This patch adds ADS7846 compatible touchscreen support for
OMAP3 Pandora.
Signed-off-by: Grazvydas Ignotas <notasas@xxxxxxxxx>
---
arch/arm/mach-omap2/board-omap3pandora.c | 57 ++++++++++++++++++++++++++++++
1 files changed, 57 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap3pandora.c b/arch/arm/mach-omap2/board-omap3pandora.c
index 9fd3499..b10bf00 100644
--- a/arch/arm/mach-omap2/board-omap3pandora.c
+++ b/arch/arm/mach-omap2/board-omap3pandora.c
@@ -25,6 +25,8 @@
#include <linux/kernel.h>
#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/ads7846.h>
#include <linux/i2c/twl4030.h>
#include <linux/mtd/mtd.h>
@@ -45,6 +47,7 @@
#include <mach/nand.h>
#include <mach/usb-ehci.h>
#include <mach/usb-musb.h>
+#include <mach/mcspi.h>
#include "sdram-micron-mt46h32m32lf-6.h"
#include "mmc-twl4030.h"
@@ -54,6 +57,8 @@
#define GPMC_CS0_BASE 0x60
#define GPMC_CS_SIZE 0x30
+#define OMAP3_PANDORA_TS_GPIO 94
+
static struct mtd_partition omap3pandora_nand_partitions[] = {
{
.name = "xloader",
@@ -185,6 +190,55 @@ static void __init omap3pandora_init_irq(void)
omap_gpio_init();
}
+static void __init omap3pandora_ads7846_init(void)
+{
+ int gpio = OMAP3_PANDORA_TS_GPIO;
+ int ret;
+
+ ret = gpio_request(gpio, "ads7846_pen_down");
+ if (ret < 0) {
+ printk(KERN_ERR "Failed to request GPIO %d for "
+ "ads7846 pen down IRQ\n", gpio);
+ return;
+ }
+
+ gpio_direction_input(gpio);
+}
+
+static int ads7846_get_pendown_state(void)
+{
+ return !gpio_get_value(OMAP3_PANDORA_TS_GPIO);
+}
+
+static struct ads7846_platform_data ads7846_config = {
+ .x_max = 0x0fff,
+ .y_max = 0x0fff,
+ .x_plate_ohms = 180,
+ .pressure_max = 255,
+ .debounce_max = 10,
+ .debounce_tol = 3,
+ .debounce_rep = 1,
+ .get_pendown_state = ads7846_get_pendown_state,
+ .keep_vref_on = 1,
+};
+
+static struct omap2_mcspi_device_config ads7846_mcspi_config = {
+ .turbo_mode = 0,
+ .single_channel = 1, /* 0: slave, 1: master */
+};
+
+static struct spi_board_info omap3pandora_spi_board_info[] __initdata = {
+ {
+ .modalias = "ads7846",
+ .bus_num = 1,
+ .chip_select = 0,
+ .max_speed_hz = 1500000,
+ .controller_data = &ads7846_mcspi_config,
+ .irq = OMAP_GPIO_IRQ(OMAP3_PANDORA_TS_GPIO),
+ .platform_data = &ads7846_config,
+ }
+};
+
static struct platform_device omap3pandora_lcd_device = {
.name = "pandora_lcd",
.id = -1,
@@ -219,10 +273,13 @@ static void __init omap3pandora_init(void)
omap_board_config = omap3pandora_config;
omap_board_config_size = ARRAY_SIZE(omap3pandora_config);
omap_serial_init();
+ spi_register_board_info(omap3pandora_spi_board_info,
+ ARRAY_SIZE(omap3pandora_spi_board_info));
hsmmc_init(mmc);
usb_musb_init();
usb_ehci_init();
omap3pandora_flash_init();
+ omap3pandora_ads7846_init();
}
static void __init omap3pandora_map_io(void)
--
1.5.4.3
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