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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-01-06 17:31:35 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-01-06 17:32:03 -0500
commit4ec3eb13634529c0bc7466658d84d0bbe3244aea (patch)
treeb491daac2ccfc7b8ca88e171a43f66888463568a /drivers/leds
parent24056f525051a9e186af28904b396320e18bf9a0 (diff)
parent15095bb0fe779c0403091bda7adce5fb3bb9ca35 (diff)
Merge branch 'smp' into misc
Conflicts: arch/arm/kernel/entry-armv.S arch/arm/mm/ioremap.c
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/Kconfig20
-rw-r--r--drivers/leds/Makefile2
-rw-r--r--drivers/leds/led-class.c105
-rw-r--r--drivers/leds/led-triggers.c2
-rw-r--r--drivers/leds/leds-gpio.c2
-rw-r--r--drivers/leds/leds-lp5521.c837
-rw-r--r--drivers/leds/leds-lp5523.c1069
-rw-r--r--drivers/leds/leds-net5501.c2
-rw-r--r--drivers/leds/leds-ss4200.c1
-rw-r--r--drivers/leds/ledtrig-timer.c124
10 files changed, 2046 insertions, 118 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index cc2a88d5192f..77b8fd20cd90 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -10,7 +10,7 @@ menuconfig NEW_LEDS
10if NEW_LEDS 10if NEW_LEDS
11 11
12config LEDS_CLASS 12config LEDS_CLASS
13 tristate "LED Class Support" 13 bool "LED Class Support"
14 help 14 help
15 This option enables the led sysfs class in /sys/class/leds. You'll 15 This option enables the led sysfs class in /sys/class/leds. You'll
16 need this to do anything useful with LEDs. If unsure, say N. 16 need this to do anything useful with LEDs. If unsure, say N.
@@ -176,6 +176,24 @@ config LEDS_LP3944
176 To compile this driver as a module, choose M here: the 176 To compile this driver as a module, choose M here: the
177 module will be called leds-lp3944. 177 module will be called leds-lp3944.
178 178
179config LEDS_LP5521
180 tristate "LED Support for N.S. LP5521 LED driver chip"
181 depends on LEDS_CLASS && I2C
182 help
183 If you say yes here you get support for the National Semiconductor
184 LP5521 LED driver. It is 3 channel chip with programmable engines.
185 Driver provides direct control via LED class and interface for
186 programming the engines.
187
188config LEDS_LP5523
189 tristate "LED Support for N.S. LP5523 LED driver chip"
190 depends on LEDS_CLASS && I2C
191 help
192 If you say yes here you get support for the National Semiconductor
193 LP5523 LED driver. It is 9 channel chip with programmable engines.
194 Driver provides direct control via LED class and interface for
195 programming the engines.
196
179config LEDS_CLEVO_MAIL 197config LEDS_CLEVO_MAIL
180 tristate "Mail LED on Clevo notebook" 198 tristate "Mail LED on Clevo notebook"
181 depends on X86 && SERIO_I8042 && DMI 199 depends on X86 && SERIO_I8042 && DMI
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 9c96db40ef6d..aae6989ff6b6 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -23,6 +23,8 @@ obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunfire.o
23obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o 23obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o
24obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o 24obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o
25obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o 25obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o
26obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o
27obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o
26obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o 28obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
27obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o 29obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
28obj-$(CONFIG_LEDS_FSG) += leds-fsg.o 30obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 260660076507..211e21f34bd5 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -81,6 +81,79 @@ static struct device_attribute led_class_attrs[] = {
81 __ATTR_NULL, 81 __ATTR_NULL,
82}; 82};
83 83
84static void led_timer_function(unsigned long data)
85{
86 struct led_classdev *led_cdev = (void *)data;
87 unsigned long brightness;
88 unsigned long delay;
89
90 if (!led_cdev->blink_delay_on || !led_cdev->blink_delay_off) {
91 led_set_brightness(led_cdev, LED_OFF);
92 return;
93 }
94
95 brightness = led_get_brightness(led_cdev);
96 if (!brightness) {
97 /* Time to switch the LED on. */
98 brightness = led_cdev->blink_brightness;
99 delay = led_cdev->blink_delay_on;
100 } else {
101 /* Store the current brightness value to be able
102 * to restore it when the delay_off period is over.
103 */
104 led_cdev->blink_brightness = brightness;
105 brightness = LED_OFF;
106 delay = led_cdev->blink_delay_off;
107 }
108
109 led_set_brightness(led_cdev, brightness);
110
111 mod_timer(&led_cdev->blink_timer, jiffies + msecs_to_jiffies(delay));
112}
113
114static void led_stop_software_blink(struct led_classdev *led_cdev)
115{
116 /* deactivate previous settings */
117 del_timer_sync(&led_cdev->blink_timer);
118 led_cdev->blink_delay_on = 0;
119 led_cdev->blink_delay_off = 0;
120}
121
122static void led_set_software_blink(struct led_classdev *led_cdev,
123 unsigned long delay_on,
124 unsigned long delay_off)
125{
126 int current_brightness;
127
128 current_brightness = led_get_brightness(led_cdev);
129 if (current_brightness)
130 led_cdev->blink_brightness = current_brightness;
131 if (!led_cdev->blink_brightness)
132 led_cdev->blink_brightness = led_cdev->max_brightness;
133
134 if (delay_on == led_cdev->blink_delay_on &&
135 delay_off == led_cdev->blink_delay_off)
136 return;
137
138 led_stop_software_blink(led_cdev);
139
140 led_cdev->blink_delay_on = delay_on;
141 led_cdev->blink_delay_off = delay_off;
142
143 /* never on - don't blink */
144 if (!delay_on)
145 return;
146
147 /* never off - just set to brightness */
148 if (!delay_off) {
149 led_set_brightness(led_cdev, led_cdev->blink_brightness);
150 return;
151 }
152
153 mod_timer(&led_cdev->blink_timer, jiffies + 1);
154}
155
156
84/** 157/**
85 * led_classdev_suspend - suspend an led_classdev. 158 * led_classdev_suspend - suspend an led_classdev.
86 * @led_cdev: the led_classdev to suspend. 159 * @led_cdev: the led_classdev to suspend.
@@ -148,6 +221,10 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
148 221
149 led_update_brightness(led_cdev); 222 led_update_brightness(led_cdev);
150 223
224 init_timer(&led_cdev->blink_timer);
225 led_cdev->blink_timer.function = led_timer_function;
226 led_cdev->blink_timer.data = (unsigned long)led_cdev;
227
151#ifdef CONFIG_LEDS_TRIGGERS 228#ifdef CONFIG_LEDS_TRIGGERS
152 led_trigger_set_default(led_cdev); 229 led_trigger_set_default(led_cdev);
153#endif 230#endif
@@ -157,7 +234,6 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
157 234
158 return 0; 235 return 0;
159} 236}
160
161EXPORT_SYMBOL_GPL(led_classdev_register); 237EXPORT_SYMBOL_GPL(led_classdev_register);
162 238
163/** 239/**
@@ -175,6 +251,9 @@ void led_classdev_unregister(struct led_classdev *led_cdev)
175 up_write(&led_cdev->trigger_lock); 251 up_write(&led_cdev->trigger_lock);
176#endif 252#endif
177 253
254 /* Stop blinking */
255 led_brightness_set(led_cdev, LED_OFF);
256
178 device_unregister(led_cdev->dev); 257 device_unregister(led_cdev->dev);
179 258
180 down_write(&leds_list_lock); 259 down_write(&leds_list_lock);
@@ -183,6 +262,30 @@ void led_classdev_unregister(struct led_classdev *led_cdev)
183} 262}
184EXPORT_SYMBOL_GPL(led_classdev_unregister); 263EXPORT_SYMBOL_GPL(led_classdev_unregister);
185 264
265void led_blink_set(struct led_classdev *led_cdev,
266 unsigned long *delay_on,
267 unsigned long *delay_off)
268{
269 if (led_cdev->blink_set &&
270 led_cdev->blink_set(led_cdev, delay_on, delay_off))
271 return;
272
273 /* blink with 1 Hz as default if nothing specified */
274 if (!*delay_on && !*delay_off)
275 *delay_on = *delay_off = 500;
276
277 led_set_software_blink(led_cdev, *delay_on, *delay_off);
278}
279EXPORT_SYMBOL(led_blink_set);
280
281void led_brightness_set(struct led_classdev *led_cdev,
282 enum led_brightness brightness)
283{
284 led_stop_software_blink(led_cdev);
285 led_cdev->brightness_set(led_cdev, brightness);
286}
287EXPORT_SYMBOL(led_brightness_set);
288
186static int __init leds_init(void) 289static int __init leds_init(void)
187{ 290{
188 leds_class = class_create(THIS_MODULE, "leds"); 291 leds_class = class_create(THIS_MODULE, "leds");
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index f1c00db88b5e..c41eb6180c9c 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -113,7 +113,7 @@ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger)
113 if (led_cdev->trigger->deactivate) 113 if (led_cdev->trigger->deactivate)
114 led_cdev->trigger->deactivate(led_cdev); 114 led_cdev->trigger->deactivate(led_cdev);
115 led_cdev->trigger = NULL; 115 led_cdev->trigger = NULL;
116 led_set_brightness(led_cdev, LED_OFF); 116 led_brightness_set(led_cdev, LED_OFF);
117 } 117 }
118 if (trigger) { 118 if (trigger) {
119 write_lock_irqsave(&trigger->leddev_list_lock, flags); 119 write_lock_irqsave(&trigger->leddev_list_lock, flags);
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index ea57e05d08f3..4d9fa38d9ff6 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -316,7 +316,7 @@ static struct of_platform_driver of_gpio_leds_driver = {
316 316
317static int __init gpio_led_init(void) 317static int __init gpio_led_init(void)
318{ 318{
319 int ret; 319 int ret = 0;
320 320
321#ifdef CONFIG_LEDS_GPIO_PLATFORM 321#ifdef CONFIG_LEDS_GPIO_PLATFORM
322 ret = platform_driver_register(&gpio_led_driver); 322 ret = platform_driver_register(&gpio_led_driver);
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
new file mode 100644
index 000000000000..33facd0c45d1
--- /dev/null
+++ b/drivers/leds/leds-lp5521.c
@@ -0,0 +1,837 @@
1/*
2 * LP5521 LED chip driver.
3 *
4 * Copyright (C) 2010 Nokia Corporation
5 *
6 * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 */
22
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/i2c.h>
26#include <linux/mutex.h>
27#include <linux/gpio.h>
28#include <linux/interrupt.h>
29#include <linux/delay.h>
30#include <linux/ctype.h>
31#include <linux/spinlock.h>
32#include <linux/wait.h>
33#include <linux/leds.h>
34#include <linux/leds-lp5521.h>
35#include <linux/workqueue.h>
36#include <linux/slab.h>
37
38#define LP5521_PROGRAM_LENGTH 32 /* in bytes */
39
40#define LP5521_MAX_LEDS 3 /* Maximum number of LEDs */
41#define LP5521_MAX_ENGINES 3 /* Maximum number of engines */
42
43#define LP5521_ENG_MASK_BASE 0x30 /* 00110000 */
44#define LP5521_ENG_STATUS_MASK 0x07 /* 00000111 */
45
46#define LP5521_CMD_LOAD 0x15 /* 00010101 */
47#define LP5521_CMD_RUN 0x2a /* 00101010 */
48#define LP5521_CMD_DIRECT 0x3f /* 00111111 */
49#define LP5521_CMD_DISABLED 0x00 /* 00000000 */
50
51/* Registers */
52#define LP5521_REG_ENABLE 0x00
53#define LP5521_REG_OP_MODE 0x01
54#define LP5521_REG_R_PWM 0x02
55#define LP5521_REG_G_PWM 0x03
56#define LP5521_REG_B_PWM 0x04
57#define LP5521_REG_R_CURRENT 0x05
58#define LP5521_REG_G_CURRENT 0x06
59#define LP5521_REG_B_CURRENT 0x07
60#define LP5521_REG_CONFIG 0x08
61#define LP5521_REG_R_CHANNEL_PC 0x09
62#define LP5521_REG_G_CHANNEL_PC 0x0A
63#define LP5521_REG_B_CHANNEL_PC 0x0B
64#define LP5521_REG_STATUS 0x0C
65#define LP5521_REG_RESET 0x0D
66#define LP5521_REG_GPO 0x0E
67#define LP5521_REG_R_PROG_MEM 0x10
68#define LP5521_REG_G_PROG_MEM 0x30
69#define LP5521_REG_B_PROG_MEM 0x50
70
71#define LP5521_PROG_MEM_BASE LP5521_REG_R_PROG_MEM
72#define LP5521_PROG_MEM_SIZE 0x20
73
74/* Base register to set LED current */
75#define LP5521_REG_LED_CURRENT_BASE LP5521_REG_R_CURRENT
76
77/* Base register to set the brightness */
78#define LP5521_REG_LED_PWM_BASE LP5521_REG_R_PWM
79
80/* Bits in ENABLE register */
81#define LP5521_MASTER_ENABLE 0x40 /* Chip master enable */
82#define LP5521_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */
83#define LP5521_EXEC_RUN 0x2A
84
85/* Bits in CONFIG register */
86#define LP5521_PWM_HF 0x40 /* PWM: 0 = 256Hz, 1 = 558Hz */
87#define LP5521_PWRSAVE_EN 0x20 /* 1 = Power save mode */
88#define LP5521_CP_MODE_OFF 0 /* Charge pump (CP) off */
89#define LP5521_CP_MODE_BYPASS 8 /* CP forced to bypass mode */
90#define LP5521_CP_MODE_1X5 0x10 /* CP forced to 1.5x mode */
91#define LP5521_CP_MODE_AUTO 0x18 /* Automatic mode selection */
92#define LP5521_R_TO_BATT 4 /* R out: 0 = CP, 1 = Vbat */
93#define LP5521_CLK_SRC_EXT 0 /* Ext-clk source (CLK_32K) */
94#define LP5521_CLK_INT 1 /* Internal clock */
95#define LP5521_CLK_AUTO 2 /* Automatic clock selection */
96
97/* Status */
98#define LP5521_EXT_CLK_USED 0x08
99
100struct lp5521_engine {
101 const struct attribute_group *attributes;
102 int id;
103 u8 mode;
104 u8 prog_page;
105 u8 engine_mask;
106};
107
108struct lp5521_led {
109 int id;
110 u8 chan_nr;
111 u8 led_current;
112 u8 max_current;
113 struct led_classdev cdev;
114 struct work_struct brightness_work;
115 u8 brightness;
116};
117
118struct lp5521_chip {
119 struct lp5521_platform_data *pdata;
120 struct mutex lock; /* Serialize control */
121 struct i2c_client *client;
122 struct lp5521_engine engines[LP5521_MAX_ENGINES];
123 struct lp5521_led leds[LP5521_MAX_LEDS];
124 u8 num_channels;
125 u8 num_leds;
126};
127
128static inline struct lp5521_led *cdev_to_led(struct led_classdev *cdev)
129{
130 return container_of(cdev, struct lp5521_led, cdev);
131}
132
133static inline struct lp5521_chip *engine_to_lp5521(struct lp5521_engine *engine)
134{
135 return container_of(engine, struct lp5521_chip,
136 engines[engine->id - 1]);
137}
138
139static inline struct lp5521_chip *led_to_lp5521(struct lp5521_led *led)
140{
141 return container_of(led, struct lp5521_chip,
142 leds[led->id]);
143}
144
145static void lp5521_led_brightness_work(struct work_struct *work);
146
147static inline int lp5521_write(struct i2c_client *client, u8 reg, u8 value)
148{
149 return i2c_smbus_write_byte_data(client, reg, value);
150}
151
152static int lp5521_read(struct i2c_client *client, u8 reg, u8 *buf)
153{
154 s32 ret;
155
156 ret = i2c_smbus_read_byte_data(client, reg);
157 if (ret < 0)
158 return -EIO;
159
160 *buf = ret;
161 return 0;
162}
163
164static int lp5521_set_engine_mode(struct lp5521_engine *engine, u8 mode)
165{
166 struct lp5521_chip *chip = engine_to_lp5521(engine);
167 struct i2c_client *client = chip->client;
168 int ret;
169 u8 engine_state;
170
171 /* Only transition between RUN and DIRECT mode are handled here */
172 if (mode == LP5521_CMD_LOAD)
173 return 0;
174
175 if (mode == LP5521_CMD_DISABLED)
176 mode = LP5521_CMD_DIRECT;
177
178 ret = lp5521_read(client, LP5521_REG_OP_MODE, &engine_state);
179
180 /* set mode only for this engine */
181 engine_state &= ~(engine->engine_mask);
182 mode &= engine->engine_mask;
183 engine_state |= mode;
184 ret |= lp5521_write(client, LP5521_REG_OP_MODE, engine_state);
185
186 return ret;
187}
188
189static int lp5521_load_program(struct lp5521_engine *eng, const u8 *pattern)
190{
191 struct lp5521_chip *chip = engine_to_lp5521(eng);
192 struct i2c_client *client = chip->client;
193 int ret;
194 int addr;
195 u8 mode;
196
197 /* move current engine to direct mode and remember the state */
198 ret = lp5521_set_engine_mode(eng, LP5521_CMD_DIRECT);
199 /* Mode change requires min 500 us delay. 1 - 2 ms with margin */
200 usleep_range(1000, 2000);
201 ret |= lp5521_read(client, LP5521_REG_OP_MODE, &mode);
202
203 /* For loading, all the engines to load mode */
204 lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
205 /* Mode change requires min 500 us delay. 1 - 2 ms with margin */
206 usleep_range(1000, 2000);
207 lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_LOAD);
208 /* Mode change requires min 500 us delay. 1 - 2 ms with margin */
209 usleep_range(1000, 2000);
210
211 addr = LP5521_PROG_MEM_BASE + eng->prog_page * LP5521_PROG_MEM_SIZE;
212 i2c_smbus_write_i2c_block_data(client,
213 addr,
214 LP5521_PROG_MEM_SIZE,
215 pattern);
216
217 ret |= lp5521_write(client, LP5521_REG_OP_MODE, mode);
218 return ret;
219}
220
221static int lp5521_set_led_current(struct lp5521_chip *chip, int led, u8 curr)
222{
223 return lp5521_write(chip->client,
224 LP5521_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr,
225 curr);
226}
227
228static void lp5521_init_engine(struct lp5521_chip *chip,
229 const struct attribute_group *attr_group)
230{
231 int i;
232 for (i = 0; i < ARRAY_SIZE(chip->engines); i++) {
233 chip->engines[i].id = i + 1;
234 chip->engines[i].engine_mask = LP5521_ENG_MASK_BASE >> (i * 2);
235 chip->engines[i].prog_page = i;
236 chip->engines[i].attributes = &attr_group[i];
237 }
238}
239
240static int lp5521_configure(struct i2c_client *client,
241 const struct attribute_group *attr_group)
242{
243 struct lp5521_chip *chip = i2c_get_clientdata(client);
244 int ret;
245
246 lp5521_init_engine(chip, attr_group);
247
248 /* Set all PWMs to direct control mode */
249 ret = lp5521_write(client, LP5521_REG_OP_MODE, 0x3F);
250
251 /* Enable auto-powersave, set charge pump to auto, red to battery */
252 ret |= lp5521_write(client, LP5521_REG_CONFIG,
253 LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT);
254
255 /* Initialize all channels PWM to zero -> leds off */
256 ret |= lp5521_write(client, LP5521_REG_R_PWM, 0);
257 ret |= lp5521_write(client, LP5521_REG_G_PWM, 0);
258 ret |= lp5521_write(client, LP5521_REG_B_PWM, 0);
259
260 /* Set engines are set to run state when OP_MODE enables engines */
261 ret |= lp5521_write(client, LP5521_REG_ENABLE,
262 LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM |
263 LP5521_EXEC_RUN);
264 /* enable takes 500us. 1 - 2 ms leaves some margin */
265 usleep_range(1000, 2000);
266
267 return ret;
268}
269
270static int lp5521_run_selftest(struct lp5521_chip *chip, char *buf)
271{
272 int ret;
273 u8 status;
274
275 ret = lp5521_read(chip->client, LP5521_REG_STATUS, &status);
276 if (ret < 0)
277 return ret;
278
279 /* Check that ext clock is really in use if requested */
280 if (chip->pdata && chip->pdata->clock_mode == LP5521_CLOCK_EXT)
281 if ((status & LP5521_EXT_CLK_USED) == 0)
282 return -EIO;
283 return 0;
284}
285
286static void lp5521_set_brightness(struct led_classdev *cdev,
287 enum led_brightness brightness)
288{
289 struct lp5521_led *led = cdev_to_led(cdev);
290 led->brightness = (u8)brightness;
291 schedule_work(&led->brightness_work);
292}
293
294static void lp5521_led_brightness_work(struct work_struct *work)
295{
296 struct lp5521_led *led = container_of(work,
297 struct lp5521_led,
298 brightness_work);
299 struct lp5521_chip *chip = led_to_lp5521(led);
300 struct i2c_client *client = chip->client;
301
302 mutex_lock(&chip->lock);
303 lp5521_write(client, LP5521_REG_LED_PWM_BASE + led->chan_nr,
304 led->brightness);
305 mutex_unlock(&chip->lock);
306}
307
308/* Detect the chip by setting its ENABLE register and reading it back. */
309static int lp5521_detect(struct i2c_client *client)
310{
311 int ret;
312 u8 buf;
313
314 ret = lp5521_write(client, LP5521_REG_ENABLE,
315 LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM);
316 if (ret)
317 return ret;
318 /* enable takes 500us. 1 - 2 ms leaves some margin */
319 usleep_range(1000, 2000);
320 ret = lp5521_read(client, LP5521_REG_ENABLE, &buf);
321 if (ret)
322 return ret;
323 if (buf != (LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM))
324 return -ENODEV;
325
326 return 0;
327}
328
329/* Set engine mode and create appropriate sysfs attributes, if required. */
330static int lp5521_set_mode(struct lp5521_engine *engine, u8 mode)
331{
332 struct lp5521_chip *chip = engine_to_lp5521(engine);
333 struct i2c_client *client = chip->client;
334 struct device *dev = &client->dev;
335 int ret = 0;
336
337 /* if in that mode already do nothing, except for run */
338 if (mode == engine->mode && mode != LP5521_CMD_RUN)
339 return 0;
340
341 if (mode == LP5521_CMD_RUN) {
342 ret = lp5521_set_engine_mode(engine, LP5521_CMD_RUN);
343 } else if (mode == LP5521_CMD_LOAD) {
344 lp5521_set_engine_mode(engine, LP5521_CMD_DISABLED);
345 lp5521_set_engine_mode(engine, LP5521_CMD_LOAD);
346
347 ret = sysfs_create_group(&dev->kobj, engine->attributes);
348 if (ret)
349 return ret;
350 } else if (mode == LP5521_CMD_DISABLED) {
351 lp5521_set_engine_mode(engine, LP5521_CMD_DISABLED);
352 }
353
354 /* remove load attribute from sysfs if not in load mode */
355 if (engine->mode == LP5521_CMD_LOAD && mode != LP5521_CMD_LOAD)
356 sysfs_remove_group(&dev->kobj, engine->attributes);
357
358 engine->mode = mode;
359
360 return ret;
361}
362
363static int lp5521_do_store_load(struct lp5521_engine *engine,
364 const char *buf, size_t len)
365{
366 struct lp5521_chip *chip = engine_to_lp5521(engine);
367 struct i2c_client *client = chip->client;
368 int ret, nrchars, offset = 0, i = 0;
369 char c[3];
370 unsigned cmd;
371 u8 pattern[LP5521_PROGRAM_LENGTH] = {0};
372
373 while ((offset < len - 1) && (i < LP5521_PROGRAM_LENGTH)) {
374 /* separate sscanfs because length is working only for %s */
375 ret = sscanf(buf + offset, "%2s%n ", c, &nrchars);
376 ret = sscanf(c, "%2x", &cmd);
377 if (ret != 1)
378 goto fail;
379 pattern[i] = (u8)cmd;
380
381 offset += nrchars;
382 i++;
383 }
384
385 /* Each instruction is 16bit long. Check that length is even */
386 if (i % 2)
387 goto fail;
388
389 mutex_lock(&chip->lock);
390 ret = lp5521_load_program(engine, pattern);
391 mutex_unlock(&chip->lock);
392
393 if (ret) {
394 dev_err(&client->dev, "failed loading pattern\n");
395 return ret;
396 }
397
398 return len;
399fail:
400 dev_err(&client->dev, "wrong pattern format\n");
401 return -EINVAL;
402}
403
404static ssize_t store_engine_load(struct device *dev,
405 struct device_attribute *attr,
406 const char *buf, size_t len, int nr)
407{
408 struct i2c_client *client = to_i2c_client(dev);
409 struct lp5521_chip *chip = i2c_get_clientdata(client);
410 return lp5521_do_store_load(&chip->engines[nr - 1], buf, len);
411}
412
413#define store_load(nr) \
414static ssize_t store_engine##nr##_load(struct device *dev, \
415 struct device_attribute *attr, \
416 const char *buf, size_t len) \
417{ \
418 return store_engine_load(dev, attr, buf, len, nr); \
419}
420store_load(1)
421store_load(2)
422store_load(3)
423
424static ssize_t show_engine_mode(struct device *dev,
425 struct device_attribute *attr,
426 char *buf, int nr)
427{
428 struct i2c_client *client = to_i2c_client(dev);
429 struct lp5521_chip *chip = i2c_get_clientdata(client);
430 switch (chip->engines[nr - 1].mode) {
431 case LP5521_CMD_RUN:
432 return sprintf(buf, "run\n");
433 case LP5521_CMD_LOAD:
434 return sprintf(buf, "load\n");
435 case LP5521_CMD_DISABLED:
436 return sprintf(buf, "disabled\n");
437 default:
438 return sprintf(buf, "disabled\n");
439 }
440}
441
442#define show_mode(nr) \
443static ssize_t show_engine##nr##_mode(struct device *dev, \
444 struct device_attribute *attr, \
445 char *buf) \
446{ \
447 return show_engine_mode(dev, attr, buf, nr); \
448}
449show_mode(1)
450show_mode(2)
451show_mode(3)
452
453static ssize_t store_engine_mode(struct device *dev,
454 struct device_attribute *attr,
455 const char *buf, size_t len, int nr)
456{
457 struct i2c_client *client = to_i2c_client(dev);
458 struct lp5521_chip *chip = i2c_get_clientdata(client);
459 struct lp5521_engine *engine = &chip->engines[nr - 1];
460 mutex_lock(&chip->lock);
461
462 if (!strncmp(buf, "run", 3))
463 lp5521_set_mode(engine, LP5521_CMD_RUN);
464 else if (!strncmp(buf, "load", 4))
465 lp5521_set_mode(engine, LP5521_CMD_LOAD);
466 else if (!strncmp(buf, "disabled", 8))
467 lp5521_set_mode(engine, LP5521_CMD_DISABLED);
468
469 mutex_unlock(&chip->lock);
470 return len;
471}
472
473#define store_mode(nr) \
474static ssize_t store_engine##nr##_mode(struct device *dev, \
475 struct device_attribute *attr, \
476 const char *buf, size_t len) \
477{ \
478 return store_engine_mode(dev, attr, buf, len, nr); \
479}
480store_mode(1)
481store_mode(2)
482store_mode(3)
483
484static ssize_t show_max_current(struct device *dev,
485 struct device_attribute *attr,
486 char *buf)
487{
488 struct led_classdev *led_cdev = dev_get_drvdata(dev);
489 struct lp5521_led *led = cdev_to_led(led_cdev);
490
491 return sprintf(buf, "%d\n", led->max_current);
492}
493
494static ssize_t show_current(struct device *dev,
495 struct device_attribute *attr,
496 char *buf)
497{
498 struct led_classdev *led_cdev = dev_get_drvdata(dev);
499 struct lp5521_led *led = cdev_to_led(led_cdev);
500
501 return sprintf(buf, "%d\n", led->led_current);
502}
503
504static ssize_t store_current(struct device *dev,
505 struct device_attribute *attr,
506 const char *buf, size_t len)
507{
508 struct led_classdev *led_cdev = dev_get_drvdata(dev);
509 struct lp5521_led *led = cdev_to_led(led_cdev);
510 struct lp5521_chip *chip = led_to_lp5521(led);
511 ssize_t ret;
512 unsigned long curr;
513
514 if (strict_strtoul(buf, 0, &curr))
515 return -EINVAL;
516
517 if (curr > led->max_current)
518 return -EINVAL;
519
520 mutex_lock(&chip->lock);
521 ret = lp5521_set_led_current(chip, led->id, curr);
522 mutex_unlock(&chip->lock);
523
524 if (ret < 0)
525 return ret;
526
527 led->led_current = (u8)curr;
528
529 return len;
530}
531
532static ssize_t lp5521_selftest(struct device *dev,
533 struct device_attribute *attr,
534 char *buf)
535{
536 struct i2c_client *client = to_i2c_client(dev);
537 struct lp5521_chip *chip = i2c_get_clientdata(client);
538 int ret;
539
540 mutex_lock(&chip->lock);
541 ret = lp5521_run_selftest(chip, buf);
542 mutex_unlock(&chip->lock);
543 return sprintf(buf, "%s\n", ret ? "FAIL" : "OK");
544}
545
546/* led class device attributes */
547static DEVICE_ATTR(led_current, S_IRUGO | S_IWUGO, show_current, store_current);
548static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL);
549
550static struct attribute *lp5521_led_attributes[] = {
551 &dev_attr_led_current.attr,
552 &dev_attr_max_current.attr,
553 NULL,
554};
555
556static struct attribute_group lp5521_led_attribute_group = {
557 .attrs = lp5521_led_attributes
558};
559
560/* device attributes */
561static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUGO,
562 show_engine1_mode, store_engine1_mode);
563static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUGO,
564 show_engine2_mode, store_engine2_mode);
565static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUGO,
566 show_engine3_mode, store_engine3_mode);
567static DEVICE_ATTR(engine1_load, S_IWUGO, NULL, store_engine1_load);
568static DEVICE_ATTR(engine2_load, S_IWUGO, NULL, store_engine2_load);
569static DEVICE_ATTR(engine3_load, S_IWUGO, NULL, store_engine3_load);
570static DEVICE_ATTR(selftest, S_IRUGO, lp5521_selftest, NULL);
571
572static struct attribute *lp5521_attributes[] = {
573 &dev_attr_engine1_mode.attr,
574 &dev_attr_engine2_mode.attr,
575 &dev_attr_engine3_mode.attr,
576 &dev_attr_selftest.attr,
577 NULL
578};
579
580static struct attribute *lp5521_engine1_attributes[] = {
581 &dev_attr_engine1_load.attr,
582 NULL
583};
584
585static struct attribute *lp5521_engine2_attributes[] = {
586 &dev_attr_engine2_load.attr,
587 NULL
588};
589
590static struct attribute *lp5521_engine3_attributes[] = {
591 &dev_attr_engine3_load.attr,
592 NULL
593};
594
595static const struct attribute_group lp5521_group = {
596 .attrs = lp5521_attributes,
597};
598
599static const struct attribute_group lp5521_engine_group[] = {
600 {.attrs = lp5521_engine1_attributes },
601 {.attrs = lp5521_engine2_attributes },
602 {.attrs = lp5521_engine3_attributes },
603};
604
605static int lp5521_register_sysfs(struct i2c_client *client)
606{
607 struct device *dev = &client->dev;
608 return sysfs_create_group(&dev->kobj, &lp5521_group);
609}
610
611static void lp5521_unregister_sysfs(struct i2c_client *client)
612{
613 struct lp5521_chip *chip = i2c_get_clientdata(client);
614 struct device *dev = &client->dev;
615 int i;
616
617 sysfs_remove_group(&dev->kobj, &lp5521_group);
618
619 for (i = 0; i < ARRAY_SIZE(chip->engines); i++) {
620 if (chip->engines[i].mode == LP5521_CMD_LOAD)
621 sysfs_remove_group(&dev->kobj,
622 chip->engines[i].attributes);
623 }
624
625 for (i = 0; i < chip->num_leds; i++)
626 sysfs_remove_group(&chip->leds[i].cdev.dev->kobj,
627 &lp5521_led_attribute_group);
628}
629
630static int __init lp5521_init_led(struct lp5521_led *led,
631 struct i2c_client *client,
632 int chan, struct lp5521_platform_data *pdata)
633{
634 struct device *dev = &client->dev;
635 char name[32];
636 int res;
637
638 if (chan >= LP5521_MAX_LEDS)
639 return -EINVAL;
640
641 if (pdata->led_config[chan].led_current == 0)
642 return 0;
643
644 led->led_current = pdata->led_config[chan].led_current;
645 led->max_current = pdata->led_config[chan].max_current;
646 led->chan_nr = pdata->led_config[chan].chan_nr;
647
648 if (led->chan_nr >= LP5521_MAX_LEDS) {
649 dev_err(dev, "Use channel numbers between 0 and %d\n",
650 LP5521_MAX_LEDS - 1);
651 return -EINVAL;
652 }
653
654 snprintf(name, sizeof(name), "%s:channel%d", client->name, chan);
655 led->cdev.brightness_set = lp5521_set_brightness;
656 led->cdev.name = name;
657 res = led_classdev_register(dev, &led->cdev);
658 if (res < 0) {
659 dev_err(dev, "couldn't register led on channel %d\n", chan);
660 return res;
661 }
662
663 res = sysfs_create_group(&led->cdev.dev->kobj,
664 &lp5521_led_attribute_group);
665 if (res < 0) {
666 dev_err(dev, "couldn't register current attribute\n");
667 led_classdev_unregister(&led->cdev);
668 return res;
669 }
670 return 0;
671}
672
673static int lp5521_probe(struct i2c_client *client,
674 const struct i2c_device_id *id)
675{
676 struct lp5521_chip *chip;
677 struct lp5521_platform_data *pdata;
678 int ret, i, led;
679
680 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
681 if (!chip)
682 return -ENOMEM;
683
684 i2c_set_clientdata(client, chip);
685 chip->client = client;
686
687 pdata = client->dev.platform_data;
688
689 if (!pdata) {
690 dev_err(&client->dev, "no platform data\n");
691 ret = -EINVAL;
692 goto fail1;
693 }
694
695 mutex_init(&chip->lock);
696
697 chip->pdata = pdata;
698
699 if (pdata->setup_resources) {
700 ret = pdata->setup_resources();
701 if (ret < 0)
702 goto fail1;
703 }
704
705 if (pdata->enable) {
706 pdata->enable(0);
707 usleep_range(1000, 2000); /* Keep enable down at least 1ms */
708 pdata->enable(1);
709 usleep_range(1000, 2000); /* 500us abs min. */
710 }
711
712 lp5521_write(client, LP5521_REG_RESET, 0xff);
713 usleep_range(10000, 20000); /*
714 * Exact value is not available. 10 - 20ms
715 * appears to be enough for reset.
716 */
717 ret = lp5521_detect(client);
718
719 if (ret) {
720 dev_err(&client->dev, "Chip not found\n");
721 goto fail2;
722 }
723
724 dev_info(&client->dev, "%s programmable led chip found\n", id->name);
725
726 ret = lp5521_configure(client, lp5521_engine_group);
727 if (ret < 0) {
728 dev_err(&client->dev, "error configuring chip\n");
729 goto fail2;
730 }
731
732 /* Initialize leds */
733 chip->num_channels = pdata->num_channels;
734 chip->num_leds = 0;
735 led = 0;
736 for (i = 0; i < pdata->num_channels; i++) {
737 /* Do not initialize channels that are not connected */
738 if (pdata->led_config[i].led_current == 0)
739 continue;
740
741 ret = lp5521_init_led(&chip->leds[led], client, i, pdata);
742 if (ret) {
743 dev_err(&client->dev, "error initializing leds\n");
744 goto fail3;
745 }
746 chip->num_leds++;
747
748 chip->leds[led].id = led;
749 /* Set initial LED current */
750 lp5521_set_led_current(chip, led,
751 chip->leds[led].led_current);
752
753 INIT_WORK(&(chip->leds[led].brightness_work),
754 lp5521_led_brightness_work);
755
756 led++;
757 }
758
759 ret = lp5521_register_sysfs(client);
760 if (ret) {
761 dev_err(&client->dev, "registering sysfs failed\n");
762 goto fail3;
763 }
764 return ret;
765fail3:
766 for (i = 0; i < chip->num_leds; i++) {
767 led_classdev_unregister(&chip->leds[i].cdev);
768 cancel_work_sync(&chip->leds[i].brightness_work);
769 }
770fail2:
771 if (pdata->enable)
772 pdata->enable(0);
773 if (pdata->release_resources)
774 pdata->release_resources();
775fail1:
776 kfree(chip);
777 return ret;
778}
779
780static int lp5521_remove(struct i2c_client *client)
781{
782 struct lp5521_chip *chip = i2c_get_clientdata(client);
783 int i;
784
785 lp5521_unregister_sysfs(client);
786
787 for (i = 0; i < chip->num_leds; i++) {
788 led_classdev_unregister(&chip->leds[i].cdev);
789 cancel_work_sync(&chip->leds[i].brightness_work);
790 }
791
792 if (chip->pdata->enable)
793 chip->pdata->enable(0);
794 if (chip->pdata->release_resources)
795 chip->pdata->release_resources();
796 kfree(chip);
797 return 0;
798}
799
800static const struct i2c_device_id lp5521_id[] = {
801 { "lp5521", 0 }, /* Three channel chip */
802 { }
803};
804MODULE_DEVICE_TABLE(i2c, lp5521_id);
805
806static struct i2c_driver lp5521_driver = {
807 .driver = {
808 .name = "lp5521",
809 },
810 .probe = lp5521_probe,
811 .remove = lp5521_remove,
812 .id_table = lp5521_id,
813};
814
815static int __init lp5521_init(void)
816{
817 int ret;
818
819 ret = i2c_add_driver(&lp5521_driver);
820
821 if (ret < 0)
822 printk(KERN_ALERT "Adding lp5521 driver failed\n");
823
824 return ret;
825}
826
827static void __exit lp5521_exit(void)
828{
829 i2c_del_driver(&lp5521_driver);
830}
831
832module_init(lp5521_init);
833module_exit(lp5521_exit);
834
835MODULE_AUTHOR("Mathias Nyman, Yuri Zaporozhets, Samu Onkalo");
836MODULE_DESCRIPTION("LP5521 LED engine");
837MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
new file mode 100644
index 000000000000..0cc4ead2fd8b
--- /dev/null
+++ b/drivers/leds/leds-lp5523.c
@@ -0,0 +1,1069 @@
1/*
2 * lp5523.c - LP5523 LED Driver
3 *
4 * Copyright (C) 2010 Nokia Corporation
5 *
6 * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 */
22
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/i2c.h>
26#include <linux/mutex.h>
27#include <linux/gpio.h>
28#include <linux/interrupt.h>
29#include <linux/delay.h>
30#include <linux/ctype.h>
31#include <linux/spinlock.h>
32#include <linux/wait.h>
33#include <linux/leds.h>
34#include <linux/leds-lp5523.h>
35#include <linux/workqueue.h>
36#include <linux/slab.h>
37
38#define LP5523_REG_ENABLE 0x00
39#define LP5523_REG_OP_MODE 0x01
40#define LP5523_REG_RATIOMETRIC_MSB 0x02
41#define LP5523_REG_RATIOMETRIC_LSB 0x03
42#define LP5523_REG_ENABLE_LEDS_MSB 0x04
43#define LP5523_REG_ENABLE_LEDS_LSB 0x05
44#define LP5523_REG_LED_CNTRL_BASE 0x06
45#define LP5523_REG_LED_PWM_BASE 0x16
46#define LP5523_REG_LED_CURRENT_BASE 0x26
47#define LP5523_REG_CONFIG 0x36
48#define LP5523_REG_CHANNEL1_PC 0x37
49#define LP5523_REG_CHANNEL2_PC 0x38
50#define LP5523_REG_CHANNEL3_PC 0x39
51#define LP5523_REG_STATUS 0x3a
52#define LP5523_REG_GPO 0x3b
53#define LP5523_REG_VARIABLE 0x3c
54#define LP5523_REG_RESET 0x3d
55#define LP5523_REG_TEMP_CTRL 0x3e
56#define LP5523_REG_TEMP_READ 0x3f
57#define LP5523_REG_TEMP_WRITE 0x40
58#define LP5523_REG_LED_TEST_CTRL 0x41
59#define LP5523_REG_LED_TEST_ADC 0x42
60#define LP5523_REG_ENG1_VARIABLE 0x45
61#define LP5523_REG_ENG2_VARIABLE 0x46
62#define LP5523_REG_ENG3_VARIABLE 0x47
63#define LP5523_REG_MASTER_FADER1 0x48
64#define LP5523_REG_MASTER_FADER2 0x49
65#define LP5523_REG_MASTER_FADER3 0x4a
66#define LP5523_REG_CH1_PROG_START 0x4c
67#define LP5523_REG_CH2_PROG_START 0x4d
68#define LP5523_REG_CH3_PROG_START 0x4e
69#define LP5523_REG_PROG_PAGE_SEL 0x4f
70#define LP5523_REG_PROG_MEM 0x50
71
72#define LP5523_CMD_LOAD 0x15 /* 00010101 */
73#define LP5523_CMD_RUN 0x2a /* 00101010 */
74#define LP5523_CMD_DISABLED 0x00 /* 00000000 */
75
76#define LP5523_ENABLE 0x40
77#define LP5523_AUTO_INC 0x40
78#define LP5523_PWR_SAVE 0x20
79#define LP5523_PWM_PWR_SAVE 0x04
80#define LP5523_CP_1 0x08
81#define LP5523_CP_1_5 0x10
82#define LP5523_CP_AUTO 0x18
83#define LP5523_INT_CLK 0x01
84#define LP5523_AUTO_CLK 0x02
85#define LP5523_EN_LEDTEST 0x80
86#define LP5523_LEDTEST_DONE 0x80
87
88#define LP5523_DEFAULT_CURRENT 50 /* microAmps */
89#define LP5523_PROGRAM_LENGTH 32 /* in bytes */
90#define LP5523_PROGRAM_PAGES 6
91#define LP5523_ADC_SHORTCIRC_LIM 80
92
93#define LP5523_LEDS 9
94#define LP5523_ENGINES 3
95
96#define LP5523_ENG_MASK_BASE 0x30 /* 00110000 */
97
98#define LP5523_ENG_STATUS_MASK 0x07 /* 00000111 */
99
100#define LP5523_IRQ_FLAGS IRQF_TRIGGER_FALLING
101
102#define LP5523_EXT_CLK_USED 0x08
103
104#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
105#define SHIFT_MASK(id) (((id) - 1) * 2)
106
107struct lp5523_engine {
108 const struct attribute_group *attributes;
109 int id;
110 u8 mode;
111 u8 prog_page;
112 u8 mux_page;
113 u16 led_mux;
114 u8 engine_mask;
115};
116
117struct lp5523_led {
118 int id;
119 u8 chan_nr;
120 u8 led_current;
121 u8 max_current;
122 struct led_classdev cdev;
123 struct work_struct brightness_work;
124 u8 brightness;
125};
126
127struct lp5523_chip {
128 struct mutex lock; /* Serialize control */
129 struct i2c_client *client;
130 struct lp5523_engine engines[LP5523_ENGINES];
131 struct lp5523_led leds[LP5523_LEDS];
132 struct lp5523_platform_data *pdata;
133 u8 num_channels;
134 u8 num_leds;
135};
136
137static inline struct lp5523_led *cdev_to_led(struct led_classdev *cdev)
138{
139 return container_of(cdev, struct lp5523_led, cdev);
140}
141
142static inline struct lp5523_chip *engine_to_lp5523(struct lp5523_engine *engine)
143{
144 return container_of(engine, struct lp5523_chip,
145 engines[engine->id - 1]);
146}
147
148static inline struct lp5523_chip *led_to_lp5523(struct lp5523_led *led)
149{
150 return container_of(led, struct lp5523_chip,
151 leds[led->id]);
152}
153
154static int lp5523_set_mode(struct lp5523_engine *engine, u8 mode);
155static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode);
156static int lp5523_load_program(struct lp5523_engine *engine, u8 *pattern);
157
158static void lp5523_led_brightness_work(struct work_struct *work);
159
160static int lp5523_write(struct i2c_client *client, u8 reg, u8 value)
161{
162 return i2c_smbus_write_byte_data(client, reg, value);
163}
164
165static int lp5523_read(struct i2c_client *client, u8 reg, u8 *buf)
166{
167 s32 ret = i2c_smbus_read_byte_data(client, reg);
168
169 if (ret < 0)
170 return -EIO;
171
172 *buf = ret;
173 return 0;
174}
175
176static int lp5523_detect(struct i2c_client *client)
177{
178 int ret;
179 u8 buf;
180
181 ret = lp5523_write(client, LP5523_REG_ENABLE, 0x40);
182 if (ret)
183 return ret;
184 ret = lp5523_read(client, LP5523_REG_ENABLE, &buf);
185 if (ret)
186 return ret;
187 if (buf == 0x40)
188 return 0;
189 else
190 return -ENODEV;
191}
192
193static int lp5523_configure(struct i2c_client *client)
194{
195 struct lp5523_chip *chip = i2c_get_clientdata(client);
196 int ret = 0;
197 u8 status;
198
199 /* one pattern per engine setting led mux start and stop addresses */
200 u8 pattern[][LP5523_PROGRAM_LENGTH] = {
201 { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
202 { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
203 { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
204 };
205
206 ret |= lp5523_write(client, LP5523_REG_ENABLE, LP5523_ENABLE);
207 /* Chip startup time is 500 us, 1 - 2 ms gives some margin */
208 usleep_range(1000, 2000);
209
210 ret |= lp5523_write(client, LP5523_REG_CONFIG,
211 LP5523_AUTO_INC | LP5523_PWR_SAVE |
212 LP5523_CP_AUTO | LP5523_AUTO_CLK |
213 LP5523_PWM_PWR_SAVE);
214
215 /* turn on all leds */
216 ret |= lp5523_write(client, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
217 ret |= lp5523_write(client, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
218
219 /* hardcode 32 bytes of memory for each engine from program memory */
220 ret |= lp5523_write(client, LP5523_REG_CH1_PROG_START, 0x00);
221 ret |= lp5523_write(client, LP5523_REG_CH2_PROG_START, 0x10);
222 ret |= lp5523_write(client, LP5523_REG_CH3_PROG_START, 0x20);
223
224 /* write led mux address space for each channel */
225 ret |= lp5523_load_program(&chip->engines[0], pattern[0]);
226 ret |= lp5523_load_program(&chip->engines[1], pattern[1]);
227 ret |= lp5523_load_program(&chip->engines[2], pattern[2]);
228
229 if (ret) {
230 dev_err(&client->dev, "could not load mux programs\n");
231 return -1;
232 }
233
234 /* set all engines exec state and mode to run 00101010 */
235 ret |= lp5523_write(client, LP5523_REG_ENABLE,
236 (LP5523_CMD_RUN | LP5523_ENABLE));
237
238 ret |= lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_RUN);
239
240 if (ret) {
241 dev_err(&client->dev, "could not start mux programs\n");
242 return -1;
243 }
244
245 /* Let the programs run for couple of ms and check the engine status */
246 usleep_range(3000, 6000);
247 lp5523_read(client, LP5523_REG_STATUS, &status);
248 status &= LP5523_ENG_STATUS_MASK;
249
250 if (status == LP5523_ENG_STATUS_MASK) {
251 dev_dbg(&client->dev, "all engines configured\n");
252 } else {
253 dev_info(&client->dev, "status == %x\n", status);
254 dev_err(&client->dev, "cound not configure LED engine\n");
255 return -1;
256 }
257
258 dev_info(&client->dev, "disabling engines\n");
259
260 ret |= lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_DISABLED);
261
262 return ret;
263}
264
265static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode)
266{
267 struct lp5523_chip *chip = engine_to_lp5523(engine);
268 struct i2c_client *client = chip->client;
269 int ret;
270 u8 engine_state;
271
272 ret = lp5523_read(client, LP5523_REG_OP_MODE, &engine_state);
273 if (ret)
274 goto fail;
275
276 engine_state &= ~(engine->engine_mask);
277
278 /* set mode only for this engine */
279 mode &= engine->engine_mask;
280
281 engine_state |= mode;
282
283 ret |= lp5523_write(client, LP5523_REG_OP_MODE, engine_state);
284fail:
285 return ret;
286}
287
288static int lp5523_load_mux(struct lp5523_engine *engine, u16 mux)
289{
290 struct lp5523_chip *chip = engine_to_lp5523(engine);
291 struct i2c_client *client = chip->client;
292 int ret = 0;
293
294 ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
295
296 ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL, engine->mux_page);
297 ret |= lp5523_write(client, LP5523_REG_PROG_MEM,
298 (u8)(mux >> 8));
299 ret |= lp5523_write(client, LP5523_REG_PROG_MEM + 1, (u8)(mux));
300 engine->led_mux = mux;
301
302 return ret;
303}
304
305static int lp5523_load_program(struct lp5523_engine *engine, u8 *pattern)
306{
307 struct lp5523_chip *chip = engine_to_lp5523(engine);
308 struct i2c_client *client = chip->client;
309
310 int ret = 0;
311
312 ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
313
314 ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL,
315 engine->prog_page);
316 ret |= i2c_smbus_write_i2c_block_data(client, LP5523_REG_PROG_MEM,
317 LP5523_PROGRAM_LENGTH, pattern);
318
319 return ret;
320}
321
322static int lp5523_run_program(struct lp5523_engine *engine)
323{
324 struct lp5523_chip *chip = engine_to_lp5523(engine);
325 struct i2c_client *client = chip->client;
326 int ret;
327
328 ret = lp5523_write(client, LP5523_REG_ENABLE,
329 LP5523_CMD_RUN | LP5523_ENABLE);
330 if (ret)
331 goto fail;
332
333 ret = lp5523_set_engine_mode(engine, LP5523_CMD_RUN);
334fail:
335 return ret;
336}
337
338static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
339{
340 int i;
341 u16 tmp_mux = 0;
342 len = len < LP5523_LEDS ? len : LP5523_LEDS;
343 for (i = 0; i < len; i++) {
344 switch (buf[i]) {
345 case '1':
346 tmp_mux |= (1 << i);
347 break;
348 case '0':
349 break;
350 case '\n':
351 i = len;
352 break;
353 default:
354 return -1;
355 }
356 }
357 *mux = tmp_mux;
358
359 return 0;
360}
361
362static void lp5523_mux_to_array(u16 led_mux, char *array)
363{
364 int i, pos = 0;
365 for (i = 0; i < LP5523_LEDS; i++)
366 pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
367
368 array[pos] = '\0';
369}
370
371/*--------------------------------------------------------------*/
372/* Sysfs interface */
373/*--------------------------------------------------------------*/
374
375static ssize_t show_engine_leds(struct device *dev,
376 struct device_attribute *attr,
377 char *buf, int nr)
378{
379 struct i2c_client *client = to_i2c_client(dev);
380 struct lp5523_chip *chip = i2c_get_clientdata(client);
381 char mux[LP5523_LEDS + 1];
382
383 lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
384
385 return sprintf(buf, "%s\n", mux);
386}
387
388#define show_leds(nr) \
389static ssize_t show_engine##nr##_leds(struct device *dev, \
390 struct device_attribute *attr, \
391 char *buf) \
392{ \
393 return show_engine_leds(dev, attr, buf, nr); \
394}
395show_leds(1)
396show_leds(2)
397show_leds(3)
398
399static ssize_t store_engine_leds(struct device *dev,
400 struct device_attribute *attr,
401 const char *buf, size_t len, int nr)
402{
403 struct i2c_client *client = to_i2c_client(dev);
404 struct lp5523_chip *chip = i2c_get_clientdata(client);
405 u16 mux = 0;
406
407 if (lp5523_mux_parse(buf, &mux, len))
408 return -EINVAL;
409
410 if (lp5523_load_mux(&chip->engines[nr - 1], mux))
411 return -EINVAL;
412
413 return len;
414}
415
416#define store_leds(nr) \
417static ssize_t store_engine##nr##_leds(struct device *dev, \
418 struct device_attribute *attr, \
419 const char *buf, size_t len) \
420{ \
421 return store_engine_leds(dev, attr, buf, len, nr); \
422}
423store_leds(1)
424store_leds(2)
425store_leds(3)
426
427static ssize_t lp5523_selftest(struct device *dev,
428 struct device_attribute *attr,
429 char *buf)
430{
431 struct i2c_client *client = to_i2c_client(dev);
432 struct lp5523_chip *chip = i2c_get_clientdata(client);
433 int i, ret, pos = 0;
434 int led = 0;
435 u8 status, adc, vdd;
436
437 mutex_lock(&chip->lock);
438
439 ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
440 if (ret < 0)
441 goto fail;
442
443 /* Check that ext clock is really in use if requested */
444 if ((chip->pdata) && (chip->pdata->clock_mode == LP5523_CLOCK_EXT))
445 if ((status & LP5523_EXT_CLK_USED) == 0)
446 goto fail;
447
448 /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */
449 lp5523_write(chip->client, LP5523_REG_LED_TEST_CTRL,
450 LP5523_EN_LEDTEST | 16);
451 usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */
452 ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
453 if (!(status & LP5523_LEDTEST_DONE))
454 usleep_range(3000, 6000); /* Was not ready. Wait little bit */
455
456 ret |= lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &vdd);
457 vdd--; /* There may be some fluctuation in measurement */
458
459 for (i = 0; i < LP5523_LEDS; i++) {
460 /* Skip non-existing channels */
461 if (chip->pdata->led_config[i].led_current == 0)
462 continue;
463
464 /* Set default current */
465 lp5523_write(chip->client,
466 LP5523_REG_LED_CURRENT_BASE + i,
467 chip->pdata->led_config[i].led_current);
468
469 lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0xff);
470 /* let current stabilize 2 - 4ms before measurements start */
471 usleep_range(2000, 4000);
472 lp5523_write(chip->client,
473 LP5523_REG_LED_TEST_CTRL,
474 LP5523_EN_LEDTEST | i);
475 /* ADC conversion time is 2.7 ms typically */
476 usleep_range(3000, 6000);
477 ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
478 if (!(status & LP5523_LEDTEST_DONE))
479 usleep_range(3000, 6000);/* Was not ready. Wait. */
480 ret |= lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &adc);
481
482 if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
483 pos += sprintf(buf + pos, "LED %d FAIL\n", i);
484
485 lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0x00);
486
487 /* Restore current */
488 lp5523_write(chip->client,
489 LP5523_REG_LED_CURRENT_BASE + i,
490 chip->leds[led].led_current);
491 led++;
492 }
493 if (pos == 0)
494 pos = sprintf(buf, "OK\n");
495 goto release_lock;
496fail:
497 pos = sprintf(buf, "FAIL\n");
498
499release_lock:
500 mutex_unlock(&chip->lock);
501
502 return pos;
503}
504
505static void lp5523_set_brightness(struct led_classdev *cdev,
506 enum led_brightness brightness)
507{
508 struct lp5523_led *led = cdev_to_led(cdev);
509
510 led->brightness = (u8)brightness;
511
512 schedule_work(&led->brightness_work);
513}
514
515static void lp5523_led_brightness_work(struct work_struct *work)
516{
517 struct lp5523_led *led = container_of(work,
518 struct lp5523_led,
519 brightness_work);
520 struct lp5523_chip *chip = led_to_lp5523(led);
521 struct i2c_client *client = chip->client;
522
523 mutex_lock(&chip->lock);
524
525 lp5523_write(client, LP5523_REG_LED_PWM_BASE + led->chan_nr,
526 led->brightness);
527
528 mutex_unlock(&chip->lock);
529}
530
531static int lp5523_do_store_load(struct lp5523_engine *engine,
532 const char *buf, size_t len)
533{
534 struct lp5523_chip *chip = engine_to_lp5523(engine);
535 struct i2c_client *client = chip->client;
536 int ret, nrchars, offset = 0, i = 0;
537 char c[3];
538 unsigned cmd;
539 u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
540
541 while ((offset < len - 1) && (i < LP5523_PROGRAM_LENGTH)) {
542 /* separate sscanfs because length is working only for %s */
543 ret = sscanf(buf + offset, "%2s%n ", c, &nrchars);
544 ret = sscanf(c, "%2x", &cmd);
545 if (ret != 1)
546 goto fail;
547 pattern[i] = (u8)cmd;
548
549 offset += nrchars;
550 i++;
551 }
552
553 /* Each instruction is 16bit long. Check that length is even */
554 if (i % 2)
555 goto fail;
556
557 mutex_lock(&chip->lock);
558
559 ret = lp5523_load_program(engine, pattern);
560 mutex_unlock(&chip->lock);
561
562 if (ret) {
563 dev_err(&client->dev, "failed loading pattern\n");
564 return ret;
565 }
566
567 return len;
568fail:
569 dev_err(&client->dev, "wrong pattern format\n");
570 return -EINVAL;
571}
572
573static ssize_t store_engine_load(struct device *dev,
574 struct device_attribute *attr,
575 const char *buf, size_t len, int nr)
576{
577 struct i2c_client *client = to_i2c_client(dev);
578 struct lp5523_chip *chip = i2c_get_clientdata(client);
579 return lp5523_do_store_load(&chip->engines[nr - 1], buf, len);
580}
581
582#define store_load(nr) \
583static ssize_t store_engine##nr##_load(struct device *dev, \
584 struct device_attribute *attr, \
585 const char *buf, size_t len) \
586{ \
587 return store_engine_load(dev, attr, buf, len, nr); \
588}
589store_load(1)
590store_load(2)
591store_load(3)
592
593static ssize_t show_engine_mode(struct device *dev,
594 struct device_attribute *attr,
595 char *buf, int nr)
596{
597 struct i2c_client *client = to_i2c_client(dev);
598 struct lp5523_chip *chip = i2c_get_clientdata(client);
599 switch (chip->engines[nr - 1].mode) {
600 case LP5523_CMD_RUN:
601 return sprintf(buf, "run\n");
602 case LP5523_CMD_LOAD:
603 return sprintf(buf, "load\n");
604 case LP5523_CMD_DISABLED:
605 return sprintf(buf, "disabled\n");
606 default:
607 return sprintf(buf, "disabled\n");
608 }
609}
610
611#define show_mode(nr) \
612static ssize_t show_engine##nr##_mode(struct device *dev, \
613 struct device_attribute *attr, \
614 char *buf) \
615{ \
616 return show_engine_mode(dev, attr, buf, nr); \
617}
618show_mode(1)
619show_mode(2)
620show_mode(3)
621
622static ssize_t store_engine_mode(struct device *dev,
623 struct device_attribute *attr,
624 const char *buf, size_t len, int nr)
625{
626 struct i2c_client *client = to_i2c_client(dev);
627 struct lp5523_chip *chip = i2c_get_clientdata(client);
628 struct lp5523_engine *engine = &chip->engines[nr - 1];
629 mutex_lock(&chip->lock);
630
631 if (!strncmp(buf, "run", 3))
632 lp5523_set_mode(engine, LP5523_CMD_RUN);
633 else if (!strncmp(buf, "load", 4))
634 lp5523_set_mode(engine, LP5523_CMD_LOAD);
635 else if (!strncmp(buf, "disabled", 8))
636 lp5523_set_mode(engine, LP5523_CMD_DISABLED);
637
638 mutex_unlock(&chip->lock);
639 return len;
640}
641
642#define store_mode(nr) \
643static ssize_t store_engine##nr##_mode(struct device *dev, \
644 struct device_attribute *attr, \
645 const char *buf, size_t len) \
646{ \
647 return store_engine_mode(dev, attr, buf, len, nr); \
648}
649store_mode(1)
650store_mode(2)
651store_mode(3)
652
653static ssize_t show_max_current(struct device *dev,
654 struct device_attribute *attr,
655 char *buf)
656{
657 struct led_classdev *led_cdev = dev_get_drvdata(dev);
658 struct lp5523_led *led = cdev_to_led(led_cdev);
659
660 return sprintf(buf, "%d\n", led->max_current);
661}
662
663static ssize_t show_current(struct device *dev,
664 struct device_attribute *attr,
665 char *buf)
666{
667 struct led_classdev *led_cdev = dev_get_drvdata(dev);
668 struct lp5523_led *led = cdev_to_led(led_cdev);
669
670 return sprintf(buf, "%d\n", led->led_current);
671}
672
673static ssize_t store_current(struct device *dev,
674 struct device_attribute *attr,
675 const char *buf, size_t len)
676{
677 struct led_classdev *led_cdev = dev_get_drvdata(dev);
678 struct lp5523_led *led = cdev_to_led(led_cdev);
679 struct lp5523_chip *chip = led_to_lp5523(led);
680 ssize_t ret;
681 unsigned long curr;
682
683 if (strict_strtoul(buf, 0, &curr))
684 return -EINVAL;
685
686 if (curr > led->max_current)
687 return -EINVAL;
688
689 mutex_lock(&chip->lock);
690 ret = lp5523_write(chip->client,
691 LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
692 (u8)curr);
693 mutex_unlock(&chip->lock);
694
695 if (ret < 0)
696 return ret;
697
698 led->led_current = (u8)curr;
699
700 return len;
701}
702
703/* led class device attributes */
704static DEVICE_ATTR(led_current, S_IRUGO | S_IWUGO, show_current, store_current);
705static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL);
706
707static struct attribute *lp5523_led_attributes[] = {
708 &dev_attr_led_current.attr,
709 &dev_attr_max_current.attr,
710 NULL,
711};
712
713static struct attribute_group lp5523_led_attribute_group = {
714 .attrs = lp5523_led_attributes
715};
716
717/* device attributes */
718static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUGO,
719 show_engine1_mode, store_engine1_mode);
720static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUGO,
721 show_engine2_mode, store_engine2_mode);
722static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUGO,
723 show_engine3_mode, store_engine3_mode);
724static DEVICE_ATTR(engine1_leds, S_IRUGO | S_IWUGO,
725 show_engine1_leds, store_engine1_leds);
726static DEVICE_ATTR(engine2_leds, S_IRUGO | S_IWUGO,
727 show_engine2_leds, store_engine2_leds);
728static DEVICE_ATTR(engine3_leds, S_IRUGO | S_IWUGO,
729 show_engine3_leds, store_engine3_leds);
730static DEVICE_ATTR(engine1_load, S_IWUGO, NULL, store_engine1_load);
731static DEVICE_ATTR(engine2_load, S_IWUGO, NULL, store_engine2_load);
732static DEVICE_ATTR(engine3_load, S_IWUGO, NULL, store_engine3_load);
733static DEVICE_ATTR(selftest, S_IRUGO, lp5523_selftest, NULL);
734
735static struct attribute *lp5523_attributes[] = {
736 &dev_attr_engine1_mode.attr,
737 &dev_attr_engine2_mode.attr,
738 &dev_attr_engine3_mode.attr,
739 &dev_attr_selftest.attr,
740 NULL
741};
742
743static struct attribute *lp5523_engine1_attributes[] = {
744 &dev_attr_engine1_load.attr,
745 &dev_attr_engine1_leds.attr,
746 NULL
747};
748
749static struct attribute *lp5523_engine2_attributes[] = {
750 &dev_attr_engine2_load.attr,
751 &dev_attr_engine2_leds.attr,
752 NULL
753};
754
755static struct attribute *lp5523_engine3_attributes[] = {
756 &dev_attr_engine3_load.attr,
757 &dev_attr_engine3_leds.attr,
758 NULL
759};
760
761static const struct attribute_group lp5523_group = {
762 .attrs = lp5523_attributes,
763};
764
765static const struct attribute_group lp5523_engine_group[] = {
766 {.attrs = lp5523_engine1_attributes },
767 {.attrs = lp5523_engine2_attributes },
768 {.attrs = lp5523_engine3_attributes },
769};
770
771static int lp5523_register_sysfs(struct i2c_client *client)
772{
773 struct device *dev = &client->dev;
774 int ret;
775
776 ret = sysfs_create_group(&dev->kobj, &lp5523_group);
777 if (ret < 0)
778 return ret;
779
780 return 0;
781}
782
783static void lp5523_unregister_sysfs(struct i2c_client *client)
784{
785 struct lp5523_chip *chip = i2c_get_clientdata(client);
786 struct device *dev = &client->dev;
787 int i;
788
789 sysfs_remove_group(&dev->kobj, &lp5523_group);
790
791 for (i = 0; i < ARRAY_SIZE(chip->engines); i++)
792 if (chip->engines[i].mode == LP5523_CMD_LOAD)
793 sysfs_remove_group(&dev->kobj, &lp5523_engine_group[i]);
794
795 for (i = 0; i < chip->num_leds; i++)
796 sysfs_remove_group(&chip->leds[i].cdev.dev->kobj,
797 &lp5523_led_attribute_group);
798}
799
800/*--------------------------------------------------------------*/
801/* Set chip operating mode */
802/*--------------------------------------------------------------*/
803static int lp5523_set_mode(struct lp5523_engine *engine, u8 mode)
804{
805 /* engine to chip */
806 struct lp5523_chip *chip = engine_to_lp5523(engine);
807 struct i2c_client *client = chip->client;
808 struct device *dev = &client->dev;
809 int ret = 0;
810
811 /* if in that mode already do nothing, except for run */
812 if (mode == engine->mode && mode != LP5523_CMD_RUN)
813 return 0;
814
815 if (mode == LP5523_CMD_RUN) {
816 ret = lp5523_run_program(engine);
817 } else if (mode == LP5523_CMD_LOAD) {
818 lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
819 lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
820
821 ret = sysfs_create_group(&dev->kobj, engine->attributes);
822 if (ret)
823 return ret;
824 } else if (mode == LP5523_CMD_DISABLED) {
825 lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
826 }
827
828 /* remove load attribute from sysfs if not in load mode */
829 if (engine->mode == LP5523_CMD_LOAD && mode != LP5523_CMD_LOAD)
830 sysfs_remove_group(&dev->kobj, engine->attributes);
831
832 engine->mode = mode;
833
834 return ret;
835}
836
837/*--------------------------------------------------------------*/
838/* Probe, Attach, Remove */
839/*--------------------------------------------------------------*/
840static int __init lp5523_init_engine(struct lp5523_engine *engine, int id)
841{
842 if (id < 1 || id > LP5523_ENGINES)
843 return -1;
844 engine->id = id;
845 engine->engine_mask = LP5523_ENG_MASK_BASE >> SHIFT_MASK(id);
846 engine->prog_page = id - 1;
847 engine->mux_page = id + 2;
848 engine->attributes = &lp5523_engine_group[id - 1];
849
850 return 0;
851}
852
853static int __init lp5523_init_led(struct lp5523_led *led, struct device *dev,
854 int chan, struct lp5523_platform_data *pdata)
855{
856 char name[32];
857 int res;
858
859 if (chan >= LP5523_LEDS)
860 return -EINVAL;
861
862 if (pdata->led_config[chan].led_current) {
863 led->led_current = pdata->led_config[chan].led_current;
864 led->max_current = pdata->led_config[chan].max_current;
865 led->chan_nr = pdata->led_config[chan].chan_nr;
866
867 if (led->chan_nr >= LP5523_LEDS) {
868 dev_err(dev, "Use channel numbers between 0 and %d\n",
869 LP5523_LEDS - 1);
870 return -EINVAL;
871 }
872
873 snprintf(name, 32, "lp5523:channel%d", chan);
874
875 led->cdev.name = name;
876 led->cdev.brightness_set = lp5523_set_brightness;
877 res = led_classdev_register(dev, &led->cdev);
878 if (res < 0) {
879 dev_err(dev, "couldn't register led on channel %d\n",
880 chan);
881 return res;
882 }
883 res = sysfs_create_group(&led->cdev.dev->kobj,
884 &lp5523_led_attribute_group);
885 if (res < 0) {
886 dev_err(dev, "couldn't register current attribute\n");
887 led_classdev_unregister(&led->cdev);
888 return res;
889 }
890 } else {
891 led->led_current = 0;
892 }
893 return 0;
894}
895
896static struct i2c_driver lp5523_driver;
897
898static int lp5523_probe(struct i2c_client *client,
899 const struct i2c_device_id *id)
900{
901 struct lp5523_chip *chip;
902 struct lp5523_platform_data *pdata;
903 int ret, i, led;
904
905 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
906 if (!chip)
907 return -ENOMEM;
908
909 i2c_set_clientdata(client, chip);
910 chip->client = client;
911
912 pdata = client->dev.platform_data;
913
914 if (!pdata) {
915 dev_err(&client->dev, "no platform data\n");
916 ret = -EINVAL;
917 goto fail1;
918 }
919
920 mutex_init(&chip->lock);
921
922 chip->pdata = pdata;
923
924 if (pdata->setup_resources) {
925 ret = pdata->setup_resources();
926 if (ret < 0)
927 goto fail1;
928 }
929
930 if (pdata->enable) {
931 pdata->enable(0);
932 usleep_range(1000, 2000); /* Keep enable down at least 1ms */
933 pdata->enable(1);
934 usleep_range(1000, 2000); /* 500us abs min. */
935 }
936
937 lp5523_write(client, LP5523_REG_RESET, 0xff);
938 usleep_range(10000, 20000); /*
939 * Exact value is not available. 10 - 20ms
940 * appears to be enough for reset.
941 */
942 ret = lp5523_detect(client);
943 if (ret)
944 goto fail2;
945
946 dev_info(&client->dev, "LP5523 Programmable led chip found\n");
947
948 /* Initialize engines */
949 for (i = 0; i < ARRAY_SIZE(chip->engines); i++) {
950 ret = lp5523_init_engine(&chip->engines[i], i + 1);
951 if (ret) {
952 dev_err(&client->dev, "error initializing engine\n");
953 goto fail2;
954 }
955 }
956 ret = lp5523_configure(client);
957 if (ret < 0) {
958 dev_err(&client->dev, "error configuring chip\n");
959 goto fail2;
960 }
961
962 /* Initialize leds */
963 chip->num_channels = pdata->num_channels;
964 chip->num_leds = 0;
965 led = 0;
966 for (i = 0; i < pdata->num_channels; i++) {
967 /* Do not initialize channels that are not connected */
968 if (pdata->led_config[i].led_current == 0)
969 continue;
970
971 ret = lp5523_init_led(&chip->leds[led], &client->dev, i, pdata);
972 if (ret) {
973 dev_err(&client->dev, "error initializing leds\n");
974 goto fail3;
975 }
976 chip->num_leds++;
977
978 chip->leds[led].id = led;
979 /* Set LED current */
980 lp5523_write(client,
981 LP5523_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr,
982 chip->leds[led].led_current);
983
984 INIT_WORK(&(chip->leds[led].brightness_work),
985 lp5523_led_brightness_work);
986
987 led++;
988 }
989
990 ret = lp5523_register_sysfs(client);
991 if (ret) {
992 dev_err(&client->dev, "registering sysfs failed\n");
993 goto fail3;
994 }
995 return ret;
996fail3:
997 for (i = 0; i < chip->num_leds; i++) {
998 led_classdev_unregister(&chip->leds[i].cdev);
999 cancel_work_sync(&chip->leds[i].brightness_work);
1000 }
1001fail2:
1002 if (pdata->enable)
1003 pdata->enable(0);
1004 if (pdata->release_resources)
1005 pdata->release_resources();
1006fail1:
1007 kfree(chip);
1008 return ret;
1009}
1010
1011static int lp5523_remove(struct i2c_client *client)
1012{
1013 struct lp5523_chip *chip = i2c_get_clientdata(client);
1014 int i;
1015
1016 lp5523_unregister_sysfs(client);
1017
1018 for (i = 0; i < chip->num_leds; i++) {
1019 led_classdev_unregister(&chip->leds[i].cdev);
1020 cancel_work_sync(&chip->leds[i].brightness_work);
1021 }
1022
1023 if (chip->pdata->enable)
1024 chip->pdata->enable(0);
1025 if (chip->pdata->release_resources)
1026 chip->pdata->release_resources();
1027 kfree(chip);
1028 return 0;
1029}
1030
1031static const struct i2c_device_id lp5523_id[] = {
1032 { "lp5523", 0 },
1033 { }
1034};
1035
1036MODULE_DEVICE_TABLE(i2c, lp5523_id);
1037
1038static struct i2c_driver lp5523_driver = {
1039 .driver = {
1040 .name = "lp5523",
1041 },
1042 .probe = lp5523_probe,
1043 .remove = lp5523_remove,
1044 .id_table = lp5523_id,
1045};
1046
1047static int __init lp5523_init(void)
1048{
1049 int ret;
1050
1051 ret = i2c_add_driver(&lp5523_driver);
1052
1053 if (ret < 0)
1054 printk(KERN_ALERT "Adding lp5523 driver failed\n");
1055
1056 return ret;
1057}
1058
1059static void __exit lp5523_exit(void)
1060{
1061 i2c_del_driver(&lp5523_driver);
1062}
1063
1064module_init(lp5523_init);
1065module_exit(lp5523_exit);
1066
1067MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
1068MODULE_DESCRIPTION("LP5523 LED engine");
1069MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-net5501.c b/drivers/leds/leds-net5501.c
index 3063f591f0dc..1739557a9038 100644
--- a/drivers/leds/leds-net5501.c
+++ b/drivers/leds/leds-net5501.c
@@ -92,3 +92,5 @@ unmap:
92} 92}
93 93
94arch_initcall(soekris_init); 94arch_initcall(soekris_init);
95
96MODULE_LICENSE("GPL");
diff --git a/drivers/leds/leds-ss4200.c b/drivers/leds/leds-ss4200.c
index a688293abd0b..614ebebaaa28 100644
--- a/drivers/leds/leds-ss4200.c
+++ b/drivers/leds/leds-ss4200.c
@@ -102,6 +102,7 @@ static struct dmi_system_id __initdata nas_led_whitelist[] = {
102 DMI_MATCH(DMI_PRODUCT_VERSION, "1.00.00") 102 DMI_MATCH(DMI_PRODUCT_VERSION, "1.00.00")
103 } 103 }
104 }, 104 },
105 {}
105}; 106};
106 107
107/* 108/*
diff --git a/drivers/leds/ledtrig-timer.c b/drivers/leds/ledtrig-timer.c
index 82b77bd482ff..b09bcbeade9c 100644
--- a/drivers/leds/ledtrig-timer.c
+++ b/drivers/leds/ledtrig-timer.c
@@ -12,73 +12,25 @@
12 */ 12 */
13 13
14#include <linux/module.h> 14#include <linux/module.h>
15#include <linux/jiffies.h>
16#include <linux/kernel.h> 15#include <linux/kernel.h>
17#include <linux/init.h> 16#include <linux/init.h>
18#include <linux/list.h>
19#include <linux/spinlock.h>
20#include <linux/device.h> 17#include <linux/device.h>
21#include <linux/sysdev.h>
22#include <linux/timer.h>
23#include <linux/ctype.h> 18#include <linux/ctype.h>
24#include <linux/leds.h> 19#include <linux/leds.h>
25#include <linux/slab.h>
26#include "leds.h" 20#include "leds.h"
27 21
28struct timer_trig_data {
29 int brightness_on; /* LED brightness during "on" period.
30 * (LED_OFF < brightness_on <= LED_FULL)
31 */
32 unsigned long delay_on; /* milliseconds on */
33 unsigned long delay_off; /* milliseconds off */
34 struct timer_list timer;
35};
36
37static void led_timer_function(unsigned long data)
38{
39 struct led_classdev *led_cdev = (struct led_classdev *) data;
40 struct timer_trig_data *timer_data = led_cdev->trigger_data;
41 unsigned long brightness;
42 unsigned long delay;
43
44 if (!timer_data->delay_on || !timer_data->delay_off) {
45 led_set_brightness(led_cdev, LED_OFF);
46 return;
47 }
48
49 brightness = led_get_brightness(led_cdev);
50 if (!brightness) {
51 /* Time to switch the LED on. */
52 brightness = timer_data->brightness_on;
53 delay = timer_data->delay_on;
54 } else {
55 /* Store the current brightness value to be able
56 * to restore it when the delay_off period is over.
57 */
58 timer_data->brightness_on = brightness;
59 brightness = LED_OFF;
60 delay = timer_data->delay_off;
61 }
62
63 led_set_brightness(led_cdev, brightness);
64
65 mod_timer(&timer_data->timer, jiffies + msecs_to_jiffies(delay));
66}
67
68static ssize_t led_delay_on_show(struct device *dev, 22static ssize_t led_delay_on_show(struct device *dev,
69 struct device_attribute *attr, char *buf) 23 struct device_attribute *attr, char *buf)
70{ 24{
71 struct led_classdev *led_cdev = dev_get_drvdata(dev); 25 struct led_classdev *led_cdev = dev_get_drvdata(dev);
72 struct timer_trig_data *timer_data = led_cdev->trigger_data;
73 26
74 return sprintf(buf, "%lu\n", timer_data->delay_on); 27 return sprintf(buf, "%lu\n", led_cdev->blink_delay_on);
75} 28}
76 29
77static ssize_t led_delay_on_store(struct device *dev, 30static ssize_t led_delay_on_store(struct device *dev,
78 struct device_attribute *attr, const char *buf, size_t size) 31 struct device_attribute *attr, const char *buf, size_t size)
79{ 32{
80 struct led_classdev *led_cdev = dev_get_drvdata(dev); 33 struct led_classdev *led_cdev = dev_get_drvdata(dev);
81 struct timer_trig_data *timer_data = led_cdev->trigger_data;
82 int ret = -EINVAL; 34 int ret = -EINVAL;
83 char *after; 35 char *after;
84 unsigned long state = simple_strtoul(buf, &after, 10); 36 unsigned long state = simple_strtoul(buf, &after, 10);
@@ -88,21 +40,7 @@ static ssize_t led_delay_on_store(struct device *dev,
88 count++; 40 count++;
89 41
90 if (count == size) { 42 if (count == size) {
91 if (timer_data->delay_on != state) { 43 led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off);
92 /* the new value differs from the previous */
93 timer_data->delay_on = state;
94
95 /* deactivate previous settings */
96 del_timer_sync(&timer_data->timer);
97
98 /* try to activate hardware acceleration, if any */
99 if (!led_cdev->blink_set ||
100 led_cdev->blink_set(led_cdev,
101 &timer_data->delay_on, &timer_data->delay_off)) {
102 /* no hardware acceleration, blink via timer */
103 mod_timer(&timer_data->timer, jiffies + 1);
104 }
105 }
106 ret = count; 44 ret = count;
107 } 45 }
108 46
@@ -113,16 +51,14 @@ static ssize_t led_delay_off_show(struct device *dev,
113 struct device_attribute *attr, char *buf) 51 struct device_attribute *attr, char *buf)
114{ 52{
115 struct led_classdev *led_cdev = dev_get_drvdata(dev); 53 struct led_classdev *led_cdev = dev_get_drvdata(dev);
116 struct timer_trig_data *timer_data = led_cdev->trigger_data;
117 54
118 return sprintf(buf, "%lu\n", timer_data->delay_off); 55 return sprintf(buf, "%lu\n", led_cdev->blink_delay_off);
119} 56}
120 57
121static ssize_t led_delay_off_store(struct device *dev, 58static ssize_t led_delay_off_store(struct device *dev,
122 struct device_attribute *attr, const char *buf, size_t size) 59 struct device_attribute *attr, const char *buf, size_t size)
123{ 60{
124 struct led_classdev *led_cdev = dev_get_drvdata(dev); 61 struct led_classdev *led_cdev = dev_get_drvdata(dev);
125 struct timer_trig_data *timer_data = led_cdev->trigger_data;
126 int ret = -EINVAL; 62 int ret = -EINVAL;
127 char *after; 63 char *after;
128 unsigned long state = simple_strtoul(buf, &after, 10); 64 unsigned long state = simple_strtoul(buf, &after, 10);
@@ -132,21 +68,7 @@ static ssize_t led_delay_off_store(struct device *dev,
132 count++; 68 count++;
133 69
134 if (count == size) { 70 if (count == size) {
135 if (timer_data->delay_off != state) { 71 led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state);
136 /* the new value differs from the previous */
137 timer_data->delay_off = state;
138
139 /* deactivate previous settings */
140 del_timer_sync(&timer_data->timer);
141
142 /* try to activate hardware acceleration, if any */
143 if (!led_cdev->blink_set ||
144 led_cdev->blink_set(led_cdev,
145 &timer_data->delay_on, &timer_data->delay_off)) {
146 /* no hardware acceleration, blink via timer */
147 mod_timer(&timer_data->timer, jiffies + 1);
148 }
149 }
150 ret = count; 72 ret = count;
151 } 73 }
152 74
@@ -158,60 +80,34 @@ static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
158 80
159static void timer_trig_activate(struct led_classdev *led_cdev) 81static void timer_trig_activate(struct led_classdev *led_cdev)
160{ 82{
161 struct timer_trig_data *timer_data;
162 int rc; 83 int rc;
163 84
164 timer_data = kzalloc(sizeof(struct timer_trig_data), GFP_KERNEL); 85 led_cdev->trigger_data = NULL;
165 if (!timer_data)
166 return;
167
168 timer_data->brightness_on = led_get_brightness(led_cdev);
169 if (timer_data->brightness_on == LED_OFF)
170 timer_data->brightness_on = led_cdev->max_brightness;
171 led_cdev->trigger_data = timer_data;
172
173 init_timer(&timer_data->timer);
174 timer_data->timer.function = led_timer_function;
175 timer_data->timer.data = (unsigned long) led_cdev;
176 86
177 rc = device_create_file(led_cdev->dev, &dev_attr_delay_on); 87 rc = device_create_file(led_cdev->dev, &dev_attr_delay_on);
178 if (rc) 88 if (rc)
179 goto err_out; 89 return;
180 rc = device_create_file(led_cdev->dev, &dev_attr_delay_off); 90 rc = device_create_file(led_cdev->dev, &dev_attr_delay_off);
181 if (rc) 91 if (rc)
182 goto err_out_delayon; 92 goto err_out_delayon;
183 93
184 /* If there is hardware support for blinking, start one 94 led_cdev->trigger_data = (void *)1;
185 * user friendly blink rate chosen by the driver.
186 */
187 if (led_cdev->blink_set)
188 led_cdev->blink_set(led_cdev,
189 &timer_data->delay_on, &timer_data->delay_off);
190 95
191 return; 96 return;
192 97
193err_out_delayon: 98err_out_delayon:
194 device_remove_file(led_cdev->dev, &dev_attr_delay_on); 99 device_remove_file(led_cdev->dev, &dev_attr_delay_on);
195err_out:
196 led_cdev->trigger_data = NULL;
197 kfree(timer_data);
198} 100}
199 101
200static void timer_trig_deactivate(struct led_classdev *led_cdev) 102static void timer_trig_deactivate(struct led_classdev *led_cdev)
201{ 103{
202 struct timer_trig_data *timer_data = led_cdev->trigger_data; 104 if (led_cdev->trigger_data) {
203 unsigned long on = 0, off = 0;
204
205 if (timer_data) {
206 device_remove_file(led_cdev->dev, &dev_attr_delay_on); 105 device_remove_file(led_cdev->dev, &dev_attr_delay_on);
207 device_remove_file(led_cdev->dev, &dev_attr_delay_off); 106 device_remove_file(led_cdev->dev, &dev_attr_delay_off);
208 del_timer_sync(&timer_data->timer);
209 kfree(timer_data);
210 } 107 }
211 108
212 /* If there is hardware support for blinking, stop it */ 109 /* Stop blinking */
213 if (led_cdev->blink_set) 110 led_brightness_set(led_cdev, LED_OFF);
214 led_cdev->blink_set(led_cdev, &on, &off);
215} 111}
216 112
217static struct led_trigger timer_led_trigger = { 113static struct led_trigger timer_led_trigger = {
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-18 17:34:33 -0500