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-rw-r--r--Documentation/spi/ep93xx_spi105
-rw-r--r--arch/arm/mach-ep93xx/edb93xx.c31
-rw-r--r--arch/arm/mach-ep93xx/simone.c63
-rw-r--r--arch/arm/mach-ep93xx/vision_ep9307.c88
-rw-r--r--drivers/spi/spi-ep93xx.c139
-rw-r--r--include/linux/platform_data/spi-ep93xx.h17
6 files changed, 74 insertions, 369 deletions
diff --git a/Documentation/spi/ep93xx_spi b/Documentation/spi/ep93xx_spi
deleted file mode 100644
index 832ddce6e5fb..000000000000
--- a/Documentation/spi/ep93xx_spi
+++ /dev/null
@@ -1,105 +0,0 @@
1Cirrus EP93xx SPI controller driver HOWTO
2=========================================
3
4ep93xx_spi driver brings SPI master support for EP93xx SPI controller. Chip
5selects are implemented with GPIO lines.
6
7NOTE: If possible, don't use SFRMOUT (SFRM1) signal as a chip select. It will
8not work correctly (it cannot be controlled by software). Use GPIO lines
9instead.
10
11Sample configuration
12====================
13
14Typically driver configuration is done in platform board files (the files under
15arch/arm/mach-ep93xx/*.c). In this example we configure MMC over SPI through
16this driver on TS-7260 board. You can adapt the code to suit your needs.
17
18This example uses EGPIO9 as SD/MMC card chip select (this is wired in DIO1
19header on the board).
20
21You need to select CONFIG_MMC_SPI to use mmc_spi driver.
22
23arch/arm/mach-ep93xx/ts72xx.c:
24
25...
26#include <linux/gpio.h>
27#include <linux/spi/spi.h>
28
29#include <linux/platform_data/spi-ep93xx.h>
30
31/* this is our GPIO line used for chip select */
32#define MMC_CHIP_SELECT_GPIO EP93XX_GPIO_LINE_EGPIO9
33
34static int ts72xx_mmc_spi_setup(struct spi_device *spi)
35{
36 int err;
37
38 err = gpio_request(MMC_CHIP_SELECT_GPIO, spi->modalias);
39 if (err)
40 return err;
41
42 gpio_direction_output(MMC_CHIP_SELECT_GPIO, 1);
43
44 return 0;
45}
46
47static void ts72xx_mmc_spi_cleanup(struct spi_device *spi)
48{
49 gpio_set_value(MMC_CHIP_SELECT_GPIO, 1);
50 gpio_direction_input(MMC_CHIP_SELECT_GPIO);
51 gpio_free(MMC_CHIP_SELECT_GPIO);
52}
53
54static void ts72xx_mmc_spi_cs_control(struct spi_device *spi, int value)
55{
56 gpio_set_value(MMC_CHIP_SELECT_GPIO, value);
57}
58
59static struct ep93xx_spi_chip_ops ts72xx_mmc_spi_ops = {
60 .setup = ts72xx_mmc_spi_setup,
61 .cleanup = ts72xx_mmc_spi_cleanup,
62 .cs_control = ts72xx_mmc_spi_cs_control,
63};
64
65static struct spi_board_info ts72xx_spi_devices[] __initdata = {
66 {
67 .modalias = "mmc_spi",
68 .controller_data = &ts72xx_mmc_spi_ops,
69 /*
70 * We use 10 MHz even though the maximum is 7.4 MHz. The driver
71 * will limit it automatically to max. frequency.
72 */
73 .max_speed_hz = 10 * 1000 * 1000,
74 .bus_num = 0,
75 .chip_select = 0,
76 .mode = SPI_MODE_0,
77 },
78};
79
80static struct ep93xx_spi_info ts72xx_spi_info = {
81 .num_chipselect = ARRAY_SIZE(ts72xx_spi_devices),
82};
83
84static void __init ts72xx_init_machine(void)
85{
86 ...
87 ep93xx_register_spi(&ts72xx_spi_info, ts72xx_spi_devices,
88 ARRAY_SIZE(ts72xx_spi_devices));
89}
90
91The driver can use DMA for the transfers also. In this case ts72xx_spi_info
92becomes:
93
94static struct ep93xx_spi_info ts72xx_spi_info = {
95 .num_chipselect = ARRAY_SIZE(ts72xx_spi_devices),
96 .use_dma = true;
97};
98
99Note that CONFIG_EP93XX_DMA should be enabled as well.
100
101Thanks to
102=========
103Martin Guy, H. Hartley Sweeten and others who helped me during development of
104the driver. Simplemachines.it donated me a Sim.One board which I used testing
105the driver on EP9307.
diff --git a/arch/arm/mach-ep93xx/edb93xx.c b/arch/arm/mach-ep93xx/edb93xx.c
index ad92d9f7e4df..0ac176386789 100644
--- a/arch/arm/mach-ep93xx/edb93xx.c
+++ b/arch/arm/mach-ep93xx/edb93xx.c
@@ -27,7 +27,6 @@
27#include <linux/kernel.h> 27#include <linux/kernel.h>
28#include <linux/init.h> 28#include <linux/init.h>
29#include <linux/platform_device.h> 29#include <linux/platform_device.h>
30#include <linux/gpio.h>
31#include <linux/i2c.h> 30#include <linux/i2c.h>
32#include <linux/i2c-gpio.h> 31#include <linux/i2c-gpio.h>
33#include <linux/spi/spi.h> 32#include <linux/spi/spi.h>
@@ -106,33 +105,10 @@ static struct cs4271_platform_data edb93xx_cs4271_data = {
106 .gpio_nreset = -EINVAL, /* filled in later */ 105 .gpio_nreset = -EINVAL, /* filled in later */
107}; 106};
108 107
109static int edb93xx_cs4271_hw_setup(struct spi_device *spi)
110{
111 return gpio_request_one(EP93XX_GPIO_LINE_EGPIO6,
112 GPIOF_OUT_INIT_HIGH, spi->modalias);
113}
114
115static void edb93xx_cs4271_hw_cleanup(struct spi_device *spi)
116{
117 gpio_free(EP93XX_GPIO_LINE_EGPIO6);
118}
119
120static void edb93xx_cs4271_hw_cs_control(struct spi_device *spi, int value)
121{
122 gpio_set_value(EP93XX_GPIO_LINE_EGPIO6, value);
123}
124
125static struct ep93xx_spi_chip_ops edb93xx_cs4271_hw = {
126 .setup = edb93xx_cs4271_hw_setup,
127 .cleanup = edb93xx_cs4271_hw_cleanup,
128 .cs_control = edb93xx_cs4271_hw_cs_control,
129};
130
131static struct spi_board_info edb93xx_spi_board_info[] __initdata = { 108static struct spi_board_info edb93xx_spi_board_info[] __initdata = {
132 { 109 {
133 .modalias = "cs4271", 110 .modalias = "cs4271",
134 .platform_data = &edb93xx_cs4271_data, 111 .platform_data = &edb93xx_cs4271_data,
135 .controller_data = &edb93xx_cs4271_hw,
136 .max_speed_hz = 6000000, 112 .max_speed_hz = 6000000,
137 .bus_num = 0, 113 .bus_num = 0,
138 .chip_select = 0, 114 .chip_select = 0,
@@ -140,8 +116,13 @@ static struct spi_board_info edb93xx_spi_board_info[] __initdata = {
140 }, 116 },
141}; 117};
142 118
119static int edb93xx_spi_chipselects[] __initdata = {
120 EP93XX_GPIO_LINE_EGPIO6,
121};
122
143static struct ep93xx_spi_info edb93xx_spi_info __initdata = { 123static struct ep93xx_spi_info edb93xx_spi_info __initdata = {
144 .num_chipselect = ARRAY_SIZE(edb93xx_spi_board_info), 124 .chipselect = edb93xx_spi_chipselects,
125 .num_chipselect = ARRAY_SIZE(edb93xx_spi_chipselects),
145}; 126};
146 127
147static void __init edb93xx_register_spi(void) 128static void __init edb93xx_register_spi(void)
diff --git a/arch/arm/mach-ep93xx/simone.c b/arch/arm/mach-ep93xx/simone.c
index 7bb540c421ee..c7a40f245892 100644
--- a/arch/arm/mach-ep93xx/simone.c
+++ b/arch/arm/mach-ep93xx/simone.c
@@ -49,56 +49,6 @@ static struct ep93xxfb_mach_info __initdata simone_fb_info = {
49#define MMC_CARD_DETECT_GPIO EP93XX_GPIO_LINE_EGPIO0 49#define MMC_CARD_DETECT_GPIO EP93XX_GPIO_LINE_EGPIO0
50 50
51/* 51/*
52 * Up to v1.3, the Sim.One used SFRMOUT as SD card chip select, but this goes
53 * low between multi-message command blocks. From v1.4, it uses a GPIO instead.
54 * v1.3 parts will still work, since the signal on SFRMOUT is automatic.
55 */
56#define MMC_CHIP_SELECT_GPIO EP93XX_GPIO_LINE_EGPIO1
57
58/*
59 * MMC SPI chip select GPIO handling. If you are using SFRMOUT (SFRM1) signal,
60 * you can leave these empty and pass NULL as .controller_data.
61 */
62
63static int simone_mmc_spi_setup(struct spi_device *spi)
64{
65 unsigned int gpio = MMC_CHIP_SELECT_GPIO;
66 int err;
67
68 err = gpio_request(gpio, spi->modalias);
69 if (err)
70 return err;
71
72 err = gpio_direction_output(gpio, 1);
73 if (err) {
74 gpio_free(gpio);
75 return err;
76 }
77
78 return 0;
79}
80
81static void simone_mmc_spi_cleanup(struct spi_device *spi)
82{
83 unsigned int gpio = MMC_CHIP_SELECT_GPIO;
84
85 gpio_set_value(gpio, 1);
86 gpio_direction_input(gpio);
87 gpio_free(gpio);
88}
89
90static void simone_mmc_spi_cs_control(struct spi_device *spi, int value)
91{
92 gpio_set_value(MMC_CHIP_SELECT_GPIO, value);
93}
94
95static struct ep93xx_spi_chip_ops simone_mmc_spi_ops = {
96 .setup = simone_mmc_spi_setup,
97 .cleanup = simone_mmc_spi_cleanup,
98 .cs_control = simone_mmc_spi_cs_control,
99};
100
101/*
102 * MMC card detection GPIO setup. 52 * MMC card detection GPIO setup.
103 */ 53 */
104 54
@@ -152,7 +102,6 @@ static struct mmc_spi_platform_data simone_mmc_spi_data = {
152static struct spi_board_info simone_spi_devices[] __initdata = { 102static struct spi_board_info simone_spi_devices[] __initdata = {
153 { 103 {
154 .modalias = "mmc_spi", 104 .modalias = "mmc_spi",
155 .controller_data = &simone_mmc_spi_ops,
156 .platform_data = &simone_mmc_spi_data, 105 .platform_data = &simone_mmc_spi_data,
157 /* 106 /*
158 * We use 10 MHz even though the maximum is 3.7 MHz. The driver 107 * We use 10 MHz even though the maximum is 3.7 MHz. The driver
@@ -165,8 +114,18 @@ static struct spi_board_info simone_spi_devices[] __initdata = {
165 }, 114 },
166}; 115};
167 116
117/*
118 * Up to v1.3, the Sim.One used SFRMOUT as SD card chip select, but this goes
119 * low between multi-message command blocks. From v1.4, it uses a GPIO instead.
120 * v1.3 parts will still work, since the signal on SFRMOUT is automatic.
121 */
122static int simone_spi_chipselects[] __initdata = {
123 EP93XX_GPIO_LINE_EGPIO1,
124};
125
168static struct ep93xx_spi_info simone_spi_info __initdata = { 126static struct ep93xx_spi_info simone_spi_info __initdata = {
169 .num_chipselect = ARRAY_SIZE(simone_spi_devices), 127 .chipselect = simone_spi_chipselects,
128 .num_chipselect = ARRAY_SIZE(simone_spi_chipselects),
170 .use_dma = 1, 129 .use_dma = 1,
171}; 130};
172 131
diff --git a/arch/arm/mach-ep93xx/vision_ep9307.c b/arch/arm/mach-ep93xx/vision_ep9307.c
index 5cced5988498..1daf9441058c 100644
--- a/arch/arm/mach-ep93xx/vision_ep9307.c
+++ b/arch/arm/mach-ep93xx/vision_ep9307.c
@@ -175,33 +175,9 @@ static struct cs4271_platform_data vision_cs4271_data = {
175 .gpio_nreset = EP93XX_GPIO_LINE_H(2), 175 .gpio_nreset = EP93XX_GPIO_LINE_H(2),
176}; 176};
177 177
178static int vision_cs4271_hw_setup(struct spi_device *spi)
179{
180 return gpio_request_one(EP93XX_GPIO_LINE_EGPIO6,
181 GPIOF_OUT_INIT_HIGH, spi->modalias);
182}
183
184static void vision_cs4271_hw_cleanup(struct spi_device *spi)
185{
186 gpio_free(EP93XX_GPIO_LINE_EGPIO6);
187}
188
189static void vision_cs4271_hw_cs_control(struct spi_device *spi, int value)
190{
191 gpio_set_value(EP93XX_GPIO_LINE_EGPIO6, value);
192}
193
194static struct ep93xx_spi_chip_ops vision_cs4271_hw = {
195 .setup = vision_cs4271_hw_setup,
196 .cleanup = vision_cs4271_hw_cleanup,
197 .cs_control = vision_cs4271_hw_cs_control,
198};
199
200/************************************************************************* 178/*************************************************************************
201 * SPI Flash 179 * SPI Flash
202 *************************************************************************/ 180 *************************************************************************/
203#define VISION_SPI_FLASH_CS EP93XX_GPIO_LINE_EGPIO7
204
205static struct mtd_partition vision_spi_flash_partitions[] = { 181static struct mtd_partition vision_spi_flash_partitions[] = {
206 { 182 {
207 .name = "SPI bootstrap", 183 .name = "SPI bootstrap",
@@ -224,68 +200,20 @@ static struct flash_platform_data vision_spi_flash_data = {
224 .nr_parts = ARRAY_SIZE(vision_spi_flash_partitions), 200 .nr_parts = ARRAY_SIZE(vision_spi_flash_partitions),
225}; 201};
226 202
227static int vision_spi_flash_hw_setup(struct spi_device *spi)
228{
229 return gpio_request_one(VISION_SPI_FLASH_CS, GPIOF_INIT_HIGH,
230 spi->modalias);
231}
232
233static void vision_spi_flash_hw_cleanup(struct spi_device *spi)
234{
235 gpio_free(VISION_SPI_FLASH_CS);
236}
237
238static void vision_spi_flash_hw_cs_control(struct spi_device *spi, int value)
239{
240 gpio_set_value(VISION_SPI_FLASH_CS, value);
241}
242
243static struct ep93xx_spi_chip_ops vision_spi_flash_hw = {
244 .setup = vision_spi_flash_hw_setup,
245 .cleanup = vision_spi_flash_hw_cleanup,
246 .cs_control = vision_spi_flash_hw_cs_control,
247};
248
249/************************************************************************* 203/*************************************************************************
250 * SPI SD/MMC host 204 * SPI SD/MMC host
251 *************************************************************************/ 205 *************************************************************************/
252#define VISION_SPI_MMC_CS EP93XX_GPIO_LINE_G(2)
253#define VISION_SPI_MMC_WP EP93XX_GPIO_LINE_F(0)
254#define VISION_SPI_MMC_CD EP93XX_GPIO_LINE_EGPIO15
255
256static struct mmc_spi_platform_data vision_spi_mmc_data = { 206static struct mmc_spi_platform_data vision_spi_mmc_data = {
257 .detect_delay = 100, 207 .detect_delay = 100,
258 .powerup_msecs = 100, 208 .powerup_msecs = 100,
259 .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34, 209 .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
260 .flags = MMC_SPI_USE_CD_GPIO | MMC_SPI_USE_RO_GPIO, 210 .flags = MMC_SPI_USE_CD_GPIO | MMC_SPI_USE_RO_GPIO,
261 .cd_gpio = VISION_SPI_MMC_CD, 211 .cd_gpio = EP93XX_GPIO_LINE_EGPIO15,
262 .cd_debounce = 1, 212 .cd_debounce = 1,
263 .ro_gpio = VISION_SPI_MMC_WP, 213 .ro_gpio = EP93XX_GPIO_LINE_F(0),
264 .caps2 = MMC_CAP2_RO_ACTIVE_HIGH, 214 .caps2 = MMC_CAP2_RO_ACTIVE_HIGH,
265}; 215};
266 216
267static int vision_spi_mmc_hw_setup(struct spi_device *spi)
268{
269 return gpio_request_one(VISION_SPI_MMC_CS, GPIOF_INIT_HIGH,
270 spi->modalias);
271}
272
273static void vision_spi_mmc_hw_cleanup(struct spi_device *spi)
274{
275 gpio_free(VISION_SPI_MMC_CS);
276}
277
278static void vision_spi_mmc_hw_cs_control(struct spi_device *spi, int value)
279{
280 gpio_set_value(VISION_SPI_MMC_CS, value);
281}
282
283static struct ep93xx_spi_chip_ops vision_spi_mmc_hw = {
284 .setup = vision_spi_mmc_hw_setup,
285 .cleanup = vision_spi_mmc_hw_cleanup,
286 .cs_control = vision_spi_mmc_hw_cs_control,
287};
288
289/************************************************************************* 217/*************************************************************************
290 * SPI Bus 218 * SPI Bus
291 *************************************************************************/ 219 *************************************************************************/
@@ -293,7 +221,6 @@ static struct spi_board_info vision_spi_board_info[] __initdata = {
293 { 221 {
294 .modalias = "cs4271", 222 .modalias = "cs4271",
295 .platform_data = &vision_cs4271_data, 223 .platform_data = &vision_cs4271_data,
296 .controller_data = &vision_cs4271_hw,
297 .max_speed_hz = 6000000, 224 .max_speed_hz = 6000000,
298 .bus_num = 0, 225 .bus_num = 0,
299 .chip_select = 0, 226 .chip_select = 0,
@@ -301,7 +228,6 @@ static struct spi_board_info vision_spi_board_info[] __initdata = {
301 }, { 228 }, {
302 .modalias = "sst25l", 229 .modalias = "sst25l",
303 .platform_data = &vision_spi_flash_data, 230 .platform_data = &vision_spi_flash_data,
304 .controller_data = &vision_spi_flash_hw,
305 .max_speed_hz = 20000000, 231 .max_speed_hz = 20000000,
306 .bus_num = 0, 232 .bus_num = 0,
307 .chip_select = 1, 233 .chip_select = 1,
@@ -309,7 +235,6 @@ static struct spi_board_info vision_spi_board_info[] __initdata = {
309 }, { 235 }, {
310 .modalias = "mmc_spi", 236 .modalias = "mmc_spi",
311 .platform_data = &vision_spi_mmc_data, 237 .platform_data = &vision_spi_mmc_data,
312 .controller_data = &vision_spi_mmc_hw,
313 .max_speed_hz = 20000000, 238 .max_speed_hz = 20000000,
314 .bus_num = 0, 239 .bus_num = 0,
315 .chip_select = 2, 240 .chip_select = 2,
@@ -317,8 +242,15 @@ static struct spi_board_info vision_spi_board_info[] __initdata = {
317 }, 242 },
318}; 243};
319 244
245static int vision_spi_chipselects[] __initdata = {
246 EP93XX_GPIO_LINE_EGPIO6,
247 EP93XX_GPIO_LINE_EGPIO7,
248 EP93XX_GPIO_LINE_G(2),
249};
250
320static struct ep93xx_spi_info vision_spi_master __initdata = { 251static struct ep93xx_spi_info vision_spi_master __initdata = {
321 .num_chipselect = ARRAY_SIZE(vision_spi_board_info), 252 .chipselect = vision_spi_chipselects,
253 .num_chipselect = ARRAY_SIZE(vision_spi_chipselects),
322 .use_dma = 1, 254 .use_dma = 1,
323}; 255};
324 256
diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c
index 17a6387e20b5..b5d766064b7b 100644
--- a/drivers/spi/spi-ep93xx.c
+++ b/drivers/spi/spi-ep93xx.c
@@ -28,6 +28,7 @@
28#include <linux/platform_device.h> 28#include <linux/platform_device.h>
29#include <linux/sched.h> 29#include <linux/sched.h>
30#include <linux/scatterlist.h> 30#include <linux/scatterlist.h>
31#include <linux/gpio.h>
31#include <linux/spi/spi.h> 32#include <linux/spi/spi.h>
32 33
33#include <linux/platform_data/dma-ep93xx.h> 34#include <linux/platform_data/dma-ep93xx.h>
@@ -107,16 +108,6 @@ struct ep93xx_spi {
107 void *zeropage; 108 void *zeropage;
108}; 109};
109 110
110/**
111 * struct ep93xx_spi_chip - SPI device hardware settings
112 * @spi: back pointer to the SPI device
113 * @ops: private chip operations
114 */
115struct ep93xx_spi_chip {
116 const struct spi_device *spi;
117 struct ep93xx_spi_chip_ops *ops;
118};
119
120/* converts bits per word to CR0.DSS value */ 111/* converts bits per word to CR0.DSS value */
121#define bits_per_word_to_dss(bpw) ((bpw) - 1) 112#define bits_per_word_to_dss(bpw) ((bpw) - 1)
122 113
@@ -229,104 +220,36 @@ static int ep93xx_spi_calc_divisors(const struct ep93xx_spi *espi,
229 return -EINVAL; 220 return -EINVAL;
230} 221}
231 222
232static void ep93xx_spi_cs_control(struct spi_device *spi, bool control) 223static void ep93xx_spi_cs_control(struct spi_device *spi, bool enable)
233{
234 struct ep93xx_spi_chip *chip = spi_get_ctldata(spi);
235 int value = (spi->mode & SPI_CS_HIGH) ? control : !control;
236
237 if (chip->ops && chip->ops->cs_control)
238 chip->ops->cs_control(spi, value);
239}
240
241/**
242 * ep93xx_spi_setup() - setup an SPI device
243 * @spi: SPI device to setup
244 *
245 * This function sets up SPI device mode, speed etc. Can be called multiple
246 * times for a single device. Returns %0 in case of success, negative error in
247 * case of failure. When this function returns success, the device is
248 * deselected.
249 */
250static int ep93xx_spi_setup(struct spi_device *spi)
251{ 224{
252 struct ep93xx_spi *espi = spi_master_get_devdata(spi->master); 225 if (spi->mode & SPI_CS_HIGH)
253 struct ep93xx_spi_chip *chip; 226 enable = !enable;
254 227
255 chip = spi_get_ctldata(spi); 228 if (gpio_is_valid(spi->cs_gpio))
256 if (!chip) { 229 gpio_set_value(spi->cs_gpio, !enable);
257 dev_dbg(&espi->pdev->dev, "initial setup for %s\n",
258 spi->modalias);
259
260 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
261 if (!chip)
262 return -ENOMEM;
263
264 chip->spi = spi;
265 chip->ops = spi->controller_data;
266
267 if (chip->ops && chip->ops->setup) {
268 int ret = chip->ops->setup(spi);
269
270 if (ret) {
271 kfree(chip);
272 return ret;
273 }
274 }
275
276 spi_set_ctldata(spi, chip);
277 }
278
279 ep93xx_spi_cs_control(spi, false);
280 return 0;
281} 230}
282 231
283/**
284 * ep93xx_spi_cleanup() - cleans up master controller specific state
285 * @spi: SPI device to cleanup
286 *
287 * This function releases master controller specific state for given @spi
288 * device.
289 */
290static void ep93xx_spi_cleanup(struct spi_device *spi)
291{
292 struct ep93xx_spi_chip *chip;
293
294 chip = spi_get_ctldata(spi);
295 if (chip) {
296 if (chip->ops && chip->ops->cleanup)
297 chip->ops->cleanup(spi);
298 spi_set_ctldata(spi, NULL);
299 kfree(chip);
300 }
301}
302
303/**
304 * ep93xx_spi_chip_setup() - configures hardware according to given @chip
305 * @espi: ep93xx SPI controller struct
306 * @chip: chip specific settings
307 * @speed_hz: transfer speed
308 * @bits_per_word: transfer bits_per_word
309 */
310static int ep93xx_spi_chip_setup(const struct ep93xx_spi *espi, 232static int ep93xx_spi_chip_setup(const struct ep93xx_spi *espi,
311 const struct ep93xx_spi_chip *chip, 233 struct spi_device *spi,
312 u32 speed_hz, u8 bits_per_word) 234 struct spi_transfer *xfer)
313{ 235{
314 u8 dss = bits_per_word_to_dss(bits_per_word); 236 u8 dss = bits_per_word_to_dss(xfer->bits_per_word);
315 u8 div_cpsr = 0; 237 u8 div_cpsr = 0;
316 u8 div_scr = 0; 238 u8 div_scr = 0;
317 u16 cr0; 239 u16 cr0;
318 int err; 240 int err;
319 241
320 err = ep93xx_spi_calc_divisors(espi, speed_hz, &div_cpsr, &div_scr); 242 err = ep93xx_spi_calc_divisors(espi, xfer->speed_hz,
243 &div_cpsr, &div_scr);
321 if (err) 244 if (err)
322 return err; 245 return err;
323 246
324 cr0 = div_scr << SSPCR0_SCR_SHIFT; 247 cr0 = div_scr << SSPCR0_SCR_SHIFT;
325 cr0 |= (chip->spi->mode & (SPI_CPHA|SPI_CPOL)) << SSPCR0_MODE_SHIFT; 248 cr0 |= (spi->mode & (SPI_CPHA | SPI_CPOL)) << SSPCR0_MODE_SHIFT;
326 cr0 |= dss; 249 cr0 |= dss;
327 250
328 dev_dbg(&espi->pdev->dev, "setup: mode %d, cpsr %d, scr %d, dss %d\n", 251 dev_dbg(&espi->pdev->dev, "setup: mode %d, cpsr %d, scr %d, dss %d\n",
329 chip->spi->mode, div_cpsr, div_scr, dss); 252 spi->mode, div_cpsr, div_scr, dss);
330 dev_dbg(&espi->pdev->dev, "setup: cr0 %#x\n", cr0); 253 dev_dbg(&espi->pdev->dev, "setup: cr0 %#x\n", cr0);
331 254
332 ep93xx_spi_write_u8(espi, SSPCPSR, div_cpsr); 255 ep93xx_spi_write_u8(espi, SSPCPSR, div_cpsr);
@@ -603,12 +526,11 @@ static void ep93xx_spi_process_transfer(struct ep93xx_spi *espi,
603 struct spi_message *msg, 526 struct spi_message *msg,
604 struct spi_transfer *t) 527 struct spi_transfer *t)
605{ 528{
606 struct ep93xx_spi_chip *chip = spi_get_ctldata(msg->spi);
607 int err; 529 int err;
608 530
609 msg->state = t; 531 msg->state = t;
610 532
611 err = ep93xx_spi_chip_setup(espi, chip, t->speed_hz, t->bits_per_word); 533 err = ep93xx_spi_chip_setup(espi, msg->spi, t);
612 if (err) { 534 if (err) {
613 dev_err(&espi->pdev->dev, 535 dev_err(&espi->pdev->dev,
614 "failed to setup chip for transfer\n"); 536 "failed to setup chip for transfer\n");
@@ -863,8 +785,13 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
863 struct resource *res; 785 struct resource *res;
864 int irq; 786 int irq;
865 int error; 787 int error;
788 int i;
866 789
867 info = dev_get_platdata(&pdev->dev); 790 info = dev_get_platdata(&pdev->dev);
791 if (!info) {
792 dev_err(&pdev->dev, "missing platform data\n");
793 return -EINVAL;
794 }
868 795
869 irq = platform_get_irq(pdev, 0); 796 irq = platform_get_irq(pdev, 0);
870 if (irq < 0) { 797 if (irq < 0) {
@@ -882,14 +809,36 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
882 if (!master) 809 if (!master)
883 return -ENOMEM; 810 return -ENOMEM;
884 811
885 master->setup = ep93xx_spi_setup;
886 master->transfer_one_message = ep93xx_spi_transfer_one_message; 812 master->transfer_one_message = ep93xx_spi_transfer_one_message;
887 master->cleanup = ep93xx_spi_cleanup;
888 master->bus_num = pdev->id; 813 master->bus_num = pdev->id;
889 master->num_chipselect = info->num_chipselect;
890 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; 814 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
891 master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16); 815 master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16);
892 816
817 master->num_chipselect = info->num_chipselect;
818 master->cs_gpios = devm_kzalloc(&master->dev,
819 sizeof(int) * master->num_chipselect,
820 GFP_KERNEL);
821 if (!master->cs_gpios) {
822 error = -ENOMEM;
823 goto fail_release_master;
824 }
825
826 for (i = 0; i < master->num_chipselect; i++) {
827 master->cs_gpios[i] = info->chipselect[i];
828
829 if (!gpio_is_valid(master->cs_gpios[i]))
830 continue;
831
832 error = devm_gpio_request_one(&pdev->dev, master->cs_gpios[i],
833 GPIOF_OUT_INIT_HIGH,
834 "ep93xx-spi");
835 if (error) {
836 dev_err(&pdev->dev, "could not request cs gpio %d\n",
837 master->cs_gpios[i]);
838 goto fail_release_master;
839 }
840 }
841
893 platform_set_drvdata(pdev, master); 842 platform_set_drvdata(pdev, master);
894 843
895 espi = spi_master_get_devdata(master); 844 espi = spi_master_get_devdata(master);
diff --git a/include/linux/platform_data/spi-ep93xx.h b/include/linux/platform_data/spi-ep93xx.h
index 9bb63ac13f04..171a271c2cbd 100644
--- a/include/linux/platform_data/spi-ep93xx.h
+++ b/include/linux/platform_data/spi-ep93xx.h
@@ -5,25 +5,14 @@ struct spi_device;
5 5
6/** 6/**
7 * struct ep93xx_spi_info - EP93xx specific SPI descriptor 7 * struct ep93xx_spi_info - EP93xx specific SPI descriptor
8 * @num_chipselect: number of chip selects on this board, must be 8 * @chipselect: array of gpio numbers to use as chip selects
9 * at least one 9 * @num_chipselect: ARRAY_SIZE(chipselect)
10 * @use_dma: use DMA for the transfers 10 * @use_dma: use DMA for the transfers
11 */ 11 */
12struct ep93xx_spi_info { 12struct ep93xx_spi_info {
13 int *chipselect;
13 int num_chipselect; 14 int num_chipselect;
14 bool use_dma; 15 bool use_dma;
15}; 16};
16 17
17/**
18 * struct ep93xx_spi_chip_ops - operation callbacks for SPI slave device
19 * @setup: setup the chip select mechanism
20 * @cleanup: cleanup the chip select mechanism
21 * @cs_control: control the device chip select
22 */
23struct ep93xx_spi_chip_ops {
24 int (*setup)(struct spi_device *spi);
25 void (*cleanup)(struct spi_device *spi);
26 void (*cs_control)(struct spi_device *spi, int value);
27};
28
29#endif /* __ASM_MACH_EP93XX_SPI_H */ 18#endif /* __ASM_MACH_EP93XX_SPI_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-02 09:41:18 -0400