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authorLinus Torvalds <torvalds@linux-foundation.org>2013-09-06 16:34:43 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-06 16:34:43 -0400
commit44598f98b98e54beca34dc836b38eaea40be1abf (patch)
tree42a498e0267b23289ffe240907fd9bacb9156a2c /drivers/video
parentb4b50fd78b1e31989940dfc647e64453d0f7176a (diff)
parent4e5f67fa538ded704c904157e3ca23ceef9c7e64 (diff)
Merge tag 'boards-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC board updates from Olof Johansson: "Board updates for 3.12. Again, a bit of domain overlap with SoC and DT branches, but most of this is around legacy code and board support. We've found that platform maintainers have a hard time separating all of these out and might move towards fewer branches for next release. - Removal of a number of Marvell Kirkwood board files, since contents is now common and mostly configured via DT. - Device-tree updates for Marvell Dove, including irqchip and clocksource setup. - Defconfig updates. Gotta go somewhere. One new one for Renesas Lager. - New backlight drivers for backlights used on Renesas shmobile platforms. - Removal of Renesas leds driver. - Shuffling of some of the new Broadcom platforms to give room for others in the same mach directory. More in 3.13" * tag 'boards-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (67 commits) mmc: sdhci-bcm-kona: Staticize sdhci_bcm_kona_card_event mmc: sdhci-bcm-kona: Remove unneeded version.h inclusion ARM: bcm: Make secure API call optional ARM: DT: binding fixup to align with vendor-prefixes.txt (drivers) ARM: mmc: fix NONREMOVABLE test in sdhci-bcm-kona ARM: bcm: Rename board_bcm mmc: sdhci-bcm-kona: make linker-section warning go away ARM: tegra: defconfig updates ARM: dove: add initial DT file for Globalscale D2Plug ARM: dove: add GPIO IR receiver node to SolidRun CuBox ARM: dove: add common pinmux functions to DT ARM: dove: add cpu device tree node ARM: dove: update dove_defconfig with SI5351, PCI, and xHCI arch/arm/mach-kirkwood: Avoid using ARRAY_AND_SIZE(e) as a function argument ARM: kirkwood: fix DT building and update defconfig ARM: kirkwood: Remove all remaining trace of DNS-320/325 platform code ARM: configs: disable DEBUG_LL in bcm_defconfig ARM: bcm281xx: Board specific reboot code ARM bcm281xx: Turn on socket & network support. ARM: bcm281xx: Turn on L2 cache. ...
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/backlight/Kconfig19
-rw-r--r--drivers/video/backlight/Makefile3
-rw-r--r--drivers/video/backlight/bd6107.c213
-rw-r--r--drivers/video/backlight/gpio_backlight.c133
-rw-r--r--drivers/video/backlight/lv5207lp.c171
5 files changed, 539 insertions, 0 deletions
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index d5ab6583f440..d4a7a351d67c 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -425,6 +425,25 @@ config BACKLIGHT_AS3711
425 If you have an Austrian Microsystems AS3711 say Y to enable the 425 If you have an Austrian Microsystems AS3711 say Y to enable the
426 backlight driver. 426 backlight driver.
427 427
428config BACKLIGHT_GPIO
429 tristate "Generic GPIO based Backlight Driver"
430 depends on GPIOLIB
431 help
432 If you have a LCD backlight adjustable by GPIO, say Y to enable
433 this driver.
434
435config BACKLIGHT_LV5207LP
436 tristate "Sanyo LV5207LP Backlight"
437 depends on I2C
438 help
439 If you have a Sanyo LV5207LP say Y to enable the backlight driver.
440
441config BACKLIGHT_BD6107
442 tristate "Rohm BD6107 Backlight"
443 depends on I2C
444 help
445 If you have a Rohm BD6107 say Y to enable the backlight driver.
446
428endif # BACKLIGHT_CLASS_DEVICE 447endif # BACKLIGHT_CLASS_DEVICE
429 448
430endif # BACKLIGHT_LCD_SUPPORT 449endif # BACKLIGHT_LCD_SUPPORT
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 92711fe60464..38e1babb1946 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -26,12 +26,14 @@ obj-$(CONFIG_BACKLIGHT_ADP8870) += adp8870_bl.o
26obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o 26obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o
27obj-$(CONFIG_BACKLIGHT_AS3711) += as3711_bl.o 27obj-$(CONFIG_BACKLIGHT_AS3711) += as3711_bl.o
28obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o 28obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o
29obj-$(CONFIG_BACKLIGHT_BD6107) += bd6107.o
29obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o 30obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o
30obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o 31obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
31obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o 32obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o
32obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o 33obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o
33obj-$(CONFIG_BACKLIGHT_EP93XX) += ep93xx_bl.o 34obj-$(CONFIG_BACKLIGHT_EP93XX) += ep93xx_bl.o
34obj-$(CONFIG_BACKLIGHT_GENERIC) += generic_bl.o 35obj-$(CONFIG_BACKLIGHT_GENERIC) += generic_bl.o
36obj-$(CONFIG_BACKLIGHT_GPIO) += gpio_backlight.o
35obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o 37obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o
36obj-$(CONFIG_BACKLIGHT_HP700) += jornada720_bl.o 38obj-$(CONFIG_BACKLIGHT_HP700) += jornada720_bl.o
37obj-$(CONFIG_BACKLIGHT_LM3533) += lm3533_bl.o 39obj-$(CONFIG_BACKLIGHT_LM3533) += lm3533_bl.o
@@ -40,6 +42,7 @@ obj-$(CONFIG_BACKLIGHT_LM3639) += lm3639_bl.o
40obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o 42obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o
41obj-$(CONFIG_BACKLIGHT_LP855X) += lp855x_bl.o 43obj-$(CONFIG_BACKLIGHT_LP855X) += lp855x_bl.o
42obj-$(CONFIG_BACKLIGHT_LP8788) += lp8788_bl.o 44obj-$(CONFIG_BACKLIGHT_LP8788) += lp8788_bl.o
45obj-$(CONFIG_BACKLIGHT_LV5207LP) += lv5207lp.o
43obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o 46obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o
44obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o 47obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o
45obj-$(CONFIG_BACKLIGHT_OT200) += ot200_bl.o 48obj-$(CONFIG_BACKLIGHT_OT200) += ot200_bl.o
diff --git a/drivers/video/backlight/bd6107.c b/drivers/video/backlight/bd6107.c
new file mode 100644
index 000000000000..15e3294b29fe
--- /dev/null
+++ b/drivers/video/backlight/bd6107.c
@@ -0,0 +1,213 @@
1/*
2 * ROHM Semiconductor BD6107 LED Driver
3 *
4 * Copyright (C) 2013 Ideas on board SPRL
5 *
6 * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/backlight.h>
14#include <linux/delay.h>
15#include <linux/err.h>
16#include <linux/fb.h>
17#include <linux/gpio.h>
18#include <linux/i2c.h>
19#include <linux/module.h>
20#include <linux/platform_data/bd6107.h>
21#include <linux/slab.h>
22
23#define BD6107_PSCNT1 0x00
24#define BD6107_PSCNT1_PSCNTREG2 (1 << 2)
25#define BD6107_PSCNT1_PSCNTREG1 (1 << 0)
26#define BD6107_REGVSET 0x02
27#define BD6107_REGVSET_REG1VSET_2_85V (1 << 2)
28#define BD6107_REGVSET_REG1VSET_2_80V (0 << 2)
29#define BD6107_LEDCNT1 0x03
30#define BD6107_LEDCNT1_LEDONOFF2 (1 << 1)
31#define BD6107_LEDCNT1_LEDONOFF1 (1 << 0)
32#define BD6107_PORTSEL 0x04
33#define BD6107_PORTSEL_LEDM(n) (1 << (n))
34#define BD6107_RGB1CNT1 0x05
35#define BD6107_RGB1CNT2 0x06
36#define BD6107_RGB1CNT3 0x07
37#define BD6107_RGB1CNT4 0x08
38#define BD6107_RGB1CNT5 0x09
39#define BD6107_RGB1FLM 0x0a
40#define BD6107_RGB2CNT1 0x0b
41#define BD6107_RGB2CNT2 0x0c
42#define BD6107_RGB2CNT3 0x0d
43#define BD6107_RGB2CNT4 0x0e
44#define BD6107_RGB2CNT5 0x0f
45#define BD6107_RGB2FLM 0x10
46#define BD6107_PSCONT3 0x11
47#define BD6107_SMMONCNT 0x12
48#define BD6107_DCDCCNT 0x13
49#define BD6107_IOSEL 0x14
50#define BD6107_OUT1 0x15
51#define BD6107_OUT2 0x16
52#define BD6107_MASK1 0x17
53#define BD6107_MASK2 0x18
54#define BD6107_FACTOR1 0x19
55#define BD6107_FACTOR2 0x1a
56#define BD6107_CLRFACT1 0x1b
57#define BD6107_CLRFACT2 0x1c
58#define BD6107_STATE1 0x1d
59#define BD6107_LSIVER 0x1e
60#define BD6107_GRPSEL 0x1f
61#define BD6107_LEDCNT2 0x20
62#define BD6107_LEDCNT3 0x21
63#define BD6107_MCURRENT 0x22
64#define BD6107_MAINCNT1 0x23
65#define BD6107_MAINCNT2 0x24
66#define BD6107_SLOPECNT 0x25
67#define BD6107_MSLOPE 0x26
68#define BD6107_RGBSLOPE 0x27
69#define BD6107_TEST 0x29
70#define BD6107_SFTRST 0x2a
71#define BD6107_SFTRSTGD 0x2b
72
73struct bd6107 {
74 struct i2c_client *client;
75 struct backlight_device *backlight;
76 struct bd6107_platform_data *pdata;
77};
78
79static int bd6107_write(struct bd6107 *bd, u8 reg, u8 data)
80{
81 return i2c_smbus_write_byte_data(bd->client, reg, data);
82}
83
84static int bd6107_backlight_update_status(struct backlight_device *backlight)
85{
86 struct bd6107 *bd = bl_get_data(backlight);
87 int brightness = backlight->props.brightness;
88
89 if (backlight->props.power != FB_BLANK_UNBLANK ||
90 backlight->props.fb_blank != FB_BLANK_UNBLANK ||
91 backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
92 brightness = 0;
93
94 if (brightness) {
95 bd6107_write(bd, BD6107_PORTSEL, BD6107_PORTSEL_LEDM(2) |
96 BD6107_PORTSEL_LEDM(1) | BD6107_PORTSEL_LEDM(0));
97 bd6107_write(bd, BD6107_MAINCNT1, brightness);
98 bd6107_write(bd, BD6107_LEDCNT1, BD6107_LEDCNT1_LEDONOFF1);
99 } else {
100 gpio_set_value(bd->pdata->reset, 0);
101 msleep(24);
102 gpio_set_value(bd->pdata->reset, 1);
103 }
104
105 return 0;
106}
107
108static int bd6107_backlight_get_brightness(struct backlight_device *backlight)
109{
110 return backlight->props.brightness;
111}
112
113static int bd6107_backlight_check_fb(struct backlight_device *backlight,
114 struct fb_info *info)
115{
116 struct bd6107 *bd = bl_get_data(backlight);
117
118 return bd->pdata->fbdev == NULL || bd->pdata->fbdev == info->dev;
119}
120
121static const struct backlight_ops bd6107_backlight_ops = {
122 .options = BL_CORE_SUSPENDRESUME,
123 .update_status = bd6107_backlight_update_status,
124 .get_brightness = bd6107_backlight_get_brightness,
125 .check_fb = bd6107_backlight_check_fb,
126};
127
128static int bd6107_probe(struct i2c_client *client,
129 const struct i2c_device_id *id)
130{
131 struct bd6107_platform_data *pdata = client->dev.platform_data;
132 struct backlight_device *backlight;
133 struct backlight_properties props;
134 struct bd6107 *bd;
135 int ret;
136
137 if (pdata == NULL || !pdata->reset) {
138 dev_err(&client->dev, "No reset GPIO in platform data\n");
139 return -EINVAL;
140 }
141
142 if (!i2c_check_functionality(client->adapter,
143 I2C_FUNC_SMBUS_BYTE_DATA)) {
144 dev_warn(&client->dev,
145 "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
146 return -EIO;
147 }
148
149 bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL);
150 if (!bd)
151 return -ENOMEM;
152
153 bd->client = client;
154 bd->pdata = pdata;
155
156 ret = devm_gpio_request_one(&client->dev, pdata->reset,
157 GPIOF_DIR_OUT | GPIOF_INIT_LOW, "reset");
158 if (ret < 0) {
159 dev_err(&client->dev, "unable to request reset GPIO\n");
160 return ret;
161 }
162
163 memset(&props, 0, sizeof(props));
164 props.type = BACKLIGHT_RAW;
165 props.max_brightness = 128;
166 props.brightness = clamp_t(unsigned int, pdata->def_value, 0,
167 props.max_brightness);
168
169 backlight = backlight_device_register(dev_name(&client->dev),
170 &bd->client->dev, bd,
171 &bd6107_backlight_ops, &props);
172 if (IS_ERR(backlight)) {
173 dev_err(&client->dev, "failed to register backlight\n");
174 return PTR_ERR(backlight);
175 }
176
177 backlight_update_status(backlight);
178 i2c_set_clientdata(client, backlight);
179
180 return 0;
181}
182
183static int bd6107_remove(struct i2c_client *client)
184{
185 struct backlight_device *backlight = i2c_get_clientdata(client);
186
187 backlight->props.brightness = 0;
188 backlight_update_status(backlight);
189 backlight_device_unregister(backlight);
190
191 return 0;
192}
193
194static const struct i2c_device_id bd6107_ids[] = {
195 { "bd6107", 0 },
196 { }
197};
198MODULE_DEVICE_TABLE(i2c, bd6107_ids);
199
200static struct i2c_driver bd6107_driver = {
201 .driver = {
202 .name = "bd6107",
203 },
204 .probe = bd6107_probe,
205 .remove = bd6107_remove,
206 .id_table = bd6107_ids,
207};
208
209module_i2c_driver(bd6107_driver);
210
211MODULE_DESCRIPTION("Rohm BD6107 Backlight Driver");
212MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
213MODULE_LICENSE("GPL");
diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c
new file mode 100644
index 000000000000..5fa217f9f445
--- /dev/null
+++ b/drivers/video/backlight/gpio_backlight.c
@@ -0,0 +1,133 @@
1/*
2 * gpio_backlight.c - Simple GPIO-controlled backlight
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#include <linux/backlight.h>
10#include <linux/err.h>
11#include <linux/fb.h>
12#include <linux/gpio.h>
13#include <linux/init.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/platform_data/gpio_backlight.h>
17#include <linux/platform_device.h>
18#include <linux/slab.h>
19
20struct gpio_backlight {
21 struct device *dev;
22 struct device *fbdev;
23
24 int gpio;
25 int active;
26};
27
28static int gpio_backlight_update_status(struct backlight_device *bl)
29{
30 struct gpio_backlight *gbl = bl_get_data(bl);
31 int brightness = bl->props.brightness;
32
33 if (bl->props.power != FB_BLANK_UNBLANK ||
34 bl->props.fb_blank != FB_BLANK_UNBLANK ||
35 bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
36 brightness = 0;
37
38 gpio_set_value(gbl->gpio, brightness ? gbl->active : !gbl->active);
39
40 return 0;
41}
42
43static int gpio_backlight_get_brightness(struct backlight_device *bl)
44{
45 return bl->props.brightness;
46}
47
48static int gpio_backlight_check_fb(struct backlight_device *bl,
49 struct fb_info *info)
50{
51 struct gpio_backlight *gbl = bl_get_data(bl);
52
53 return gbl->fbdev == NULL || gbl->fbdev == info->dev;
54}
55
56static const struct backlight_ops gpio_backlight_ops = {
57 .options = BL_CORE_SUSPENDRESUME,
58 .update_status = gpio_backlight_update_status,
59 .get_brightness = gpio_backlight_get_brightness,
60 .check_fb = gpio_backlight_check_fb,
61};
62
63static int gpio_backlight_probe(struct platform_device *pdev)
64{
65 struct gpio_backlight_platform_data *pdata = pdev->dev.platform_data;
66 struct backlight_properties props;
67 struct backlight_device *bl;
68 struct gpio_backlight *gbl;
69 int ret;
70
71 if (!pdata) {
72 dev_err(&pdev->dev, "failed to find platform data\n");
73 return -ENODEV;
74 }
75
76 gbl = devm_kzalloc(&pdev->dev, sizeof(*gbl), GFP_KERNEL);
77 if (gbl == NULL)
78 return -ENOMEM;
79
80 gbl->dev = &pdev->dev;
81 gbl->fbdev = pdata->fbdev;
82 gbl->gpio = pdata->gpio;
83 gbl->active = pdata->active_low ? 0 : 1;
84
85 ret = devm_gpio_request_one(gbl->dev, gbl->gpio, GPIOF_DIR_OUT |
86 (gbl->active ? GPIOF_INIT_LOW
87 : GPIOF_INIT_HIGH),
88 pdata->name);
89 if (ret < 0) {
90 dev_err(&pdev->dev, "unable to request GPIO\n");
91 return ret;
92 }
93
94 memset(&props, 0, sizeof(props));
95 props.type = BACKLIGHT_RAW;
96 props.max_brightness = 1;
97 bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, gbl,
98 &gpio_backlight_ops, &props);
99 if (IS_ERR(bl)) {
100 dev_err(&pdev->dev, "failed to register backlight\n");
101 return PTR_ERR(bl);
102 }
103
104 bl->props.brightness = pdata->def_value;
105 backlight_update_status(bl);
106
107 platform_set_drvdata(pdev, bl);
108 return 0;
109}
110
111static int gpio_backlight_remove(struct platform_device *pdev)
112{
113 struct backlight_device *bl = platform_get_drvdata(pdev);
114
115 backlight_device_unregister(bl);
116 return 0;
117}
118
119static struct platform_driver gpio_backlight_driver = {
120 .driver = {
121 .name = "gpio-backlight",
122 .owner = THIS_MODULE,
123 },
124 .probe = gpio_backlight_probe,
125 .remove = gpio_backlight_remove,
126};
127
128module_platform_driver(gpio_backlight_driver);
129
130MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
131MODULE_DESCRIPTION("GPIO-based Backlight Driver");
132MODULE_LICENSE("GPL");
133MODULE_ALIAS("platform:gpio-backlight");
diff --git a/drivers/video/backlight/lv5207lp.c b/drivers/video/backlight/lv5207lp.c
new file mode 100644
index 000000000000..498fd73d59b9
--- /dev/null
+++ b/drivers/video/backlight/lv5207lp.c
@@ -0,0 +1,171 @@
1/*
2 * Sanyo LV5207LP LED Driver
3 *
4 * Copyright (C) 2013 Ideas on board SPRL
5 *
6 * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/backlight.h>
14#include <linux/err.h>
15#include <linux/fb.h>
16#include <linux/i2c.h>
17#include <linux/module.h>
18#include <linux/platform_data/lv5207lp.h>
19#include <linux/slab.h>
20
21#define LV5207LP_CTRL1 0x00
22#define LV5207LP_CPSW (1 << 7)
23#define LV5207LP_SCTEN (1 << 6)
24#define LV5207LP_C10 (1 << 5)
25#define LV5207LP_CKSW (1 << 4)
26#define LV5207LP_RSW (1 << 3)
27#define LV5207LP_GSW (1 << 2)
28#define LV5207LP_BSW (1 << 1)
29#define LV5207LP_CTRL2 0x01
30#define LV5207LP_MSW (1 << 7)
31#define LV5207LP_MLED4 (1 << 6)
32#define LV5207LP_RED 0x02
33#define LV5207LP_GREEN 0x03
34#define LV5207LP_BLUE 0x04
35
36#define LV5207LP_MAX_BRIGHTNESS 32
37
38struct lv5207lp {
39 struct i2c_client *client;
40 struct backlight_device *backlight;
41 struct lv5207lp_platform_data *pdata;
42};
43
44static int lv5207lp_write(struct lv5207lp *lv, u8 reg, u8 data)
45{
46 return i2c_smbus_write_byte_data(lv->client, reg, data);
47}
48
49static int lv5207lp_backlight_update_status(struct backlight_device *backlight)
50{
51 struct lv5207lp *lv = bl_get_data(backlight);
52 int brightness = backlight->props.brightness;
53
54 if (backlight->props.power != FB_BLANK_UNBLANK ||
55 backlight->props.fb_blank != FB_BLANK_UNBLANK ||
56 backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
57 brightness = 0;
58
59 if (brightness) {
60 lv5207lp_write(lv, LV5207LP_CTRL1,
61 LV5207LP_CPSW | LV5207LP_C10 | LV5207LP_CKSW);
62 lv5207lp_write(lv, LV5207LP_CTRL2,
63 LV5207LP_MSW | LV5207LP_MLED4 |
64 (brightness - 1));
65 } else {
66 lv5207lp_write(lv, LV5207LP_CTRL1, 0);
67 lv5207lp_write(lv, LV5207LP_CTRL2, 0);
68 }
69
70 return 0;
71}
72
73static int lv5207lp_backlight_get_brightness(struct backlight_device *backlight)
74{
75 return backlight->props.brightness;
76}
77
78static int lv5207lp_backlight_check_fb(struct backlight_device *backlight,
79 struct fb_info *info)
80{
81 struct lv5207lp *lv = bl_get_data(backlight);
82
83 return lv->pdata->fbdev == NULL || lv->pdata->fbdev == info->dev;
84}
85
86static const struct backlight_ops lv5207lp_backlight_ops = {
87 .options = BL_CORE_SUSPENDRESUME,
88 .update_status = lv5207lp_backlight_update_status,
89 .get_brightness = lv5207lp_backlight_get_brightness,
90 .check_fb = lv5207lp_backlight_check_fb,
91};
92
93static int lv5207lp_probe(struct i2c_client *client,
94 const struct i2c_device_id *id)
95{
96 struct lv5207lp_platform_data *pdata = client->dev.platform_data;
97 struct backlight_device *backlight;
98 struct backlight_properties props;
99 struct lv5207lp *lv;
100
101 if (pdata == NULL) {
102 dev_err(&client->dev, "No platform data supplied\n");
103 return -EINVAL;
104 }
105
106 if (!i2c_check_functionality(client->adapter,
107 I2C_FUNC_SMBUS_BYTE_DATA)) {
108 dev_warn(&client->dev,
109 "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
110 return -EIO;
111 }
112
113 lv = devm_kzalloc(&client->dev, sizeof(*lv), GFP_KERNEL);
114 if (!lv)
115 return -ENOMEM;
116
117 lv->client = client;
118 lv->pdata = pdata;
119
120 memset(&props, 0, sizeof(props));
121 props.type = BACKLIGHT_RAW;
122 props.max_brightness = min_t(unsigned int, pdata->max_value,
123 LV5207LP_MAX_BRIGHTNESS);
124 props.brightness = clamp_t(unsigned int, pdata->def_value, 0,
125 props.max_brightness);
126
127 backlight = backlight_device_register(dev_name(&client->dev),
128 &lv->client->dev, lv,
129 &lv5207lp_backlight_ops, &props);
130 if (IS_ERR(backlight)) {
131 dev_err(&client->dev, "failed to register backlight\n");
132 return PTR_ERR(backlight);
133 }
134
135 backlight_update_status(backlight);
136 i2c_set_clientdata(client, backlight);
137
138 return 0;
139}
140
141static int lv5207lp_remove(struct i2c_client *client)
142{
143 struct backlight_device *backlight = i2c_get_clientdata(client);
144
145 backlight->props.brightness = 0;
146 backlight_update_status(backlight);
147 backlight_device_unregister(backlight);
148
149 return 0;
150}
151
152static const struct i2c_device_id lv5207lp_ids[] = {
153 { "lv5207lp", 0 },
154 { }
155};
156MODULE_DEVICE_TABLE(i2c, lv5207lp_ids);
157
158static struct i2c_driver lv5207lp_driver = {
159 .driver = {
160 .name = "lv5207lp",
161 },
162 .probe = lv5207lp_probe,
163 .remove = lv5207lp_remove,
164 .id_table = lv5207lp_ids,
165};
166
167module_i2c_driver(lv5207lp_driver);
168
169MODULE_DESCRIPTION("Sanyo LV5207LP Backlight Driver");
170MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
171MODULE_LICENSE("GPL");