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authorEric Miao <ycmiao@ycmiao-ubuntu.internal.example.org>2008-08-24 05:32:15 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-09-23 22:04:34 +0100
commit9ee40d9acf928ef561d655e78cf6c97546b8b4fc (patch)
tree8b89ebfd1d23a387af3d73015e1cb2ec50b48757 /arch/arm/mach-pxa/poodle.c
parent26b4c8dddd98ba9f759f1986e0116adaa9dce710 (diff)
[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>
Diffstat (limited to 'arch/arm/mach-pxa/poodle.c')
-rw-r--r--arch/arm/mach-pxa/poodle.c90
1 files changed, 42 insertions, 48 deletions
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,