[ARM] pxa/poodle: use SPI based ads7846 touch screen driver

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

3 files changed, 44 insertions, 49 deletions

diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index 99ecbe7f8506..b069dcbb764c 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -31,7 +31,7 @@ obj-$(CONFIG_MACH_COLIBRI)	+= colibri.o
 obj-$(CONFIG_PXA_SHARP_C7xx)    += corgi.o corgi_ssp.o corgi_lcd.o sharpsl_pm.o corgi_pm.o
 obj-$(CONFIG_PXA_SHARP_Cxx00)   += spitz.o corgi_ssp.o corgi_lcd.o sharpsl_pm.o spitz_pm.o
 obj-$(CONFIG_MACH_AKITA)        += akita-ioexp.o
-obj-$(CONFIG_MACH_POODLE)       += poodle.o corgi_ssp.o
+obj-$(CONFIG_MACH_POODLE)       += poodle.o
 obj-$(CONFIG_MACH_PCM027)       += pcm027.o
 obj-$(CONFIG_MACH_PCM990_BASEBOARD)     += pcm990-baseboard.o
 obj-$(CONFIG_MACH_TOSA)         += tosa.o
diff --git a/arch/arm/mach-pxa/include/mach/poodle.h b/arch/arm/mach-pxa/include/mach/poodle.h
index 67debc47e8c6..ecdd7f693c4c 100644
--- a/arch/arm/mach-pxa/include/mach/poodle.h
+++ b/arch/arm/mach-pxa/include/mach/poodle.h
@@ -23,6 +23,7 @@
 #define POODLE_GPIO_AC_IN               (1)
 #define POODLE_GPIO_CO                  16
 #define POODLE_GPIO_TP_INT              (5)
+#define POODLE_GPIO_TP_CS               (24)
 #define POODLE_GPIO_WAKEUP              (11)    /* change battery */
 #define POODLE_GPIO_GA_INT              (10)
 #define POODLE_GPIO_IR_ON               (22)
diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
index 461af1c582bb..d39cbf3e9d28 100644
--- a/arch/arm/mach-pxa/poodle.c
+++ b/arch/arm/mach-pxa/poodle.c
@@ -21,6 +21,8 @@
 #include <linux/pm.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/ads7846.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -43,6 +45,7 @@
 #include <mach/pxafb.h>
 #include <mach/sharpsl.h>
 #include <mach/ssp.h>
+#include <mach/pxa2xx_spi.h>
 
 #include <asm/hardware/scoop.h>
 #include <asm/hardware/locomo.h>
@@ -63,9 +66,9 @@ static unsigned long poodle_pin_config[] __initdata = {
 
         /* SSP1 */
         GPIO23_SSP1_SCLK,
-        GPIO24_SSP1_SFRM,
         GPIO25_SSP1_TXD,
         GPIO26_SSP1_RXD,
+        GPIO24_GPIO,    /* POODLE_GPIO_TP_CS - SFRM as chip select */
 
         /* I2S */
         GPIO28_I2S_BITCLK_OUT,
@@ -197,62 +200,55 @@ struct platform_device poodle_locomo_device = {
 
 EXPORT_SYMBOL(poodle_locomo_device);
 
-/*
- * Poodle SSP Device
- */
-
-struct platform_device poodle_ssp_device = {
-        .name           = "corgi-ssp",
-        .id             = -1,
+#if defined(CONFIG_SPI_PXA2XX) || defined(CONFIG_SPI_PXA2XX_MODULE)
+static struct pxa2xx_spi_master poodle_spi_info = {
+        .num_chipselect = 1,
 };
 
-struct corgissp_machinfo poodle_ssp_machinfo = {
-        .port           = 1,
-        .cs_lcdcon      = -1,
-        .cs_ads7846     = -1,
-        .cs_max1111     = -1,
-        .clk_lcdcon     = 2,
-        .clk_ads7846    = 36,
-        .clk_max1111    = 2,
+static struct ads7846_platform_data poodle_ads7846_info = {
+        .model                  = 7846,
+        .vref_delay_usecs       = 100,
+        .x_plate_ohms           = 419,
+        .y_plate_ohms           = 486,
+        .gpio_pendown           = POODLE_GPIO_TP_INT,
 };
 
-
-/*
- * Poodle Touch Screen Device
- */
-static struct resource poodlets_resources[] = {
-        [0] = {
-                .start          = POODLE_IRQ_GPIO_TP_INT,
-                .end            = POODLE_IRQ_GPIO_TP_INT,
-                .flags          = IORESOURCE_IRQ,
-        },
-};
-
-static unsigned long poodle_get_hsync_invperiod(void)
+static void ads7846_cs(u32 command)
 {
-        return 0;
+        gpio_set_value(POODLE_GPIO_TP_CS, !(command == PXA2XX_CS_ASSERT));
 }
 
-static void poodle_null_hsync(void)
-{
-}
-
-static struct corgits_machinfo  poodle_ts_machinfo = {
-        .get_hsync_invperiod    = poodle_get_hsync_invperiod,
-        .put_hsync              = poodle_null_hsync,
-        .wait_hsync             = poodle_null_hsync,
+static struct pxa2xx_spi_chip poodle_ads7846_chip = {
+        .cs_control             = ads7846_cs,
 };
 
-static struct platform_device poodle_ts_device = {
-        .name           = "corgi-ts",
-        .dev            = {
-                .platform_data  = &poodle_ts_machinfo,
+static struct spi_board_info poodle_spi_devices[] = {
+        {
+                .modalias       = "ads7846",
+                .max_speed_hz   = 10000,
+                .bus_num        = 1,
+                .platform_data  = &poodle_ads7846_info,
+                .controller_data= &poodle_ads7846_chip,
+                .irq            = gpio_to_irq(POODLE_GPIO_TP_INT),
         },
-        .id             = -1,
-        .num_resources  = ARRAY_SIZE(poodlets_resources),
-        .resource       = poodlets_resources,
 };
 
+static void __init poodle_init_spi(void)
+{
+        int err;
+
+        err = gpio_request(POODLE_GPIO_TP_CS, "ADS7846_CS");
+        if (err)
+                return;
+
+        gpio_direction_output(POODLE_GPIO_TP_CS, 1);
+
+        pxa2xx_set_spi_info(1, &poodle_spi_info);
+        spi_register_board_info(ARRAY_AND_SIZE(poodle_spi_devices));
+}
+#else
+static inline void poodle_init_spi(void) {}
+#endif
 
 /*
  * MMC/SD Device
@@ -419,8 +415,6 @@ static struct pxafb_mach_info poodle_fb_info = {
 static struct platform_device *devices[] __initdata = {
         &poodle_locomo_device,
         &poodle_scoop_device,
-        &poodle_ssp_device,
-        &poodle_ts_device,
 };
 
 static void poodle_poweroff(void)
@@ -445,7 +439,6 @@ static void __init poodle_init(void)
         pxa2xx_mfp_config(ARRAY_AND_SIZE(poodle_pin_config));
 
         platform_scoop_config = &poodle_pcmcia_config;
-        corgi_ssp_set_machinfo(&poodle_ssp_machinfo);
 
         ret = platform_add_devices(devices, ARRAY_SIZE(devices));
         if (ret)
@@ -457,6 +450,7 @@ static void __init poodle_init(void)
         pxa_set_mci_info(&poodle_mci_platform_data);
         pxa_set_ficp_info(&poodle_ficp_platform_data);
         pxa_set_i2c_info(NULL);
+        poodle_init_spi();
 }
 
 static void __init fixup_poodle(struct machine_desc *desc,