diff options
Diffstat (limited to 'arch/arm/mach-pxa/lubbock.c')
-rw-r--r-- | arch/arm/mach-pxa/lubbock.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/lubbock.c b/arch/arm/mach-pxa/lubbock.c index 3e26d7ce5bb2..1ab26c6914f2 100644 --- a/arch/arm/mach-pxa/lubbock.c +++ b/arch/arm/mach-pxa/lubbock.c | |||
@@ -22,6 +22,10 @@ | |||
22 | #include <linux/mtd/mtd.h> | 22 | #include <linux/mtd/mtd.h> |
23 | #include <linux/mtd/partitions.h> | 23 | #include <linux/mtd/partitions.h> |
24 | 24 | ||
25 | #include <linux/spi/spi.h> | ||
26 | #include <linux/spi/ads7846.h> | ||
27 | #include <asm/arch/pxa2xx_spi.h> | ||
28 | |||
25 | #include <asm/setup.h> | 29 | #include <asm/setup.h> |
26 | #include <asm/memory.h> | 30 | #include <asm/memory.h> |
27 | #include <asm/mach-types.h> | 31 | #include <asm/mach-types.h> |
@@ -196,6 +200,78 @@ static struct resource smc91x_resources[] = { | |||
196 | }, | 200 | }, |
197 | }; | 201 | }; |
198 | 202 | ||
203 | /* ADS7846 is connected through SSP ... and if your board has J5 populated, | ||
204 | * you can select it to replace the ucb1400 by switching the touchscreen cable | ||
205 | * (to J5) and poking board registers (as done below). Else it's only useful | ||
206 | * for the temperature sensors. | ||
207 | */ | ||
208 | static struct resource pxa_ssp_resources[] = { | ||
209 | [0] = { | ||
210 | .start = __PREG(SSCR0_P(1)), | ||
211 | .end = __PREG(SSCR0_P(1)) + 0x14, | ||
212 | .flags = IORESOURCE_MEM, | ||
213 | }, | ||
214 | [1] = { | ||
215 | .start = IRQ_SSP, | ||
216 | .end = IRQ_SSP, | ||
217 | .flags = IORESOURCE_IRQ, | ||
218 | }, | ||
219 | }; | ||
220 | |||
221 | static struct pxa2xx_spi_master pxa_ssp_master_info = { | ||
222 | .ssp_type = PXA25x_SSP, | ||
223 | .clock_enable = CKEN3_SSP, | ||
224 | .num_chipselect = 0, | ||
225 | }; | ||
226 | |||
227 | static struct platform_device pxa_ssp = { | ||
228 | .name = "pxa2xx-spi", | ||
229 | .id = 1, | ||
230 | .resource = pxa_ssp_resources, | ||
231 | .num_resources = ARRAY_SIZE(pxa_ssp_resources), | ||
232 | .dev = { | ||
233 | .platform_data = &pxa_ssp_master_info, | ||
234 | }, | ||
235 | }; | ||
236 | |||
237 | static int lubbock_ads7846_pendown_state(void) | ||
238 | { | ||
239 | /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */ | ||
240 | return 0; | ||
241 | } | ||
242 | |||
243 | static struct ads7846_platform_data ads_info = { | ||
244 | .model = 7846, | ||
245 | .vref_delay_usecs = 100, /* internal, no cap */ | ||
246 | .get_pendown_state = lubbock_ads7846_pendown_state, | ||
247 | // .x_plate_ohms = 500, /* GUESS! */ | ||
248 | // .y_plate_ohms = 500, /* GUESS! */ | ||
249 | }; | ||
250 | |||
251 | static void ads7846_cs(u32 command) | ||
252 | { | ||
253 | static const unsigned TS_nCS = 1 << 11; | ||
254 | lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS); | ||
255 | } | ||
256 | |||
257 | static struct pxa2xx_spi_chip ads_hw = { | ||
258 | .tx_threshold = 1, | ||
259 | .rx_threshold = 2, | ||
260 | .cs_control = ads7846_cs, | ||
261 | }; | ||
262 | |||
263 | static struct spi_board_info spi_board_info[] __initdata = { { | ||
264 | .modalias = "ads7846", | ||
265 | .platform_data = &ads_info, | ||
266 | .controller_data = &ads_hw, | ||
267 | .irq = LUBBOCK_BB_IRQ, | ||
268 | .max_speed_hz = 120000 /* max sample rate at 3V */ | ||
269 | * 26 /* command + data + overhead */, | ||
270 | .bus_num = 1, | ||
271 | .chip_select = 0, | ||
272 | }, | ||
273 | }; | ||
274 | |||
199 | static struct platform_device smc91x_device = { | 275 | static struct platform_device smc91x_device = { |
200 | .name = "smc91x", | 276 | .name = "smc91x", |
201 | .id = -1, | 277 | .id = -1, |
@@ -272,6 +348,7 @@ static struct platform_device *devices[] __initdata = { | |||
272 | &smc91x_device, | 348 | &smc91x_device, |
273 | &lubbock_flash_device[0], | 349 | &lubbock_flash_device[0], |
274 | &lubbock_flash_device[1], | 350 | &lubbock_flash_device[1], |
351 | &pxa_ssp, | ||
275 | }; | 352 | }; |
276 | 353 | ||
277 | static struct pxafb_mach_info sharp_lm8v31 __initdata = { | 354 | static struct pxafb_mach_info sharp_lm8v31 __initdata = { |
@@ -400,6 +477,8 @@ static void __init lubbock_init(void) | |||
400 | lubbock_flash_data[flashboot^1].name = "application-flash"; | 477 | lubbock_flash_data[flashboot^1].name = "application-flash"; |
401 | lubbock_flash_data[flashboot].name = "boot-rom"; | 478 | lubbock_flash_data[flashboot].name = "boot-rom"; |
402 | (void) platform_add_devices(devices, ARRAY_SIZE(devices)); | 479 | (void) platform_add_devices(devices, ARRAY_SIZE(devices)); |
480 | |||
481 | spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info)); | ||
403 | } | 482 | } |
404 | 483 | ||
405 | static struct map_desc lubbock_io_desc[] __initdata = { | 484 | static struct map_desc lubbock_io_desc[] __initdata = { |
@@ -416,6 +495,11 @@ static void __init lubbock_map_io(void) | |||
416 | pxa_map_io(); | 495 | pxa_map_io(); |
417 | iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc)); | 496 | iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc)); |
418 | 497 | ||
498 | /* SSP data pins */ | ||
499 | pxa_gpio_mode(GPIO23_SCLK_MD); | ||
500 | pxa_gpio_mode(GPIO25_STXD_MD); | ||
501 | pxa_gpio_mode(GPIO26_SRXD_MD); | ||
502 | |||
419 | /* This enables the BTUART */ | 503 | /* This enables the BTUART */ |
420 | pxa_gpio_mode(GPIO42_BTRXD_MD); | 504 | pxa_gpio_mode(GPIO42_BTRXD_MD); |
421 | pxa_gpio_mode(GPIO43_BTTXD_MD); | 505 | pxa_gpio_mode(GPIO43_BTTXD_MD); |