[PATCH 2/4-V1] AM3517: Enable TSC2004 driver support for AM3517EVM

* [PATCH 2/4-V1] AM3517: Enable TSC2004 driver support for AM3517EVM
@ 2010-01-11  6:20 hvaibhav
  2010-02-05  1:05 ` [APPLIED] " Tony Lindgren
  0 siblings, 1 reply; 6+ messages in thread
From: hvaibhav @ 2010-01-11  6:20 UTC (permalink / raw)
  To: linux-omap; +Cc: tony, khilman, Vaibhav Hiremath

From: Vaibhav Hiremath <hvaibhav@ti.com>

Add platform hook-up interface to support touch-Screen driver
(TSC2004).

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
---
 arch/arm/mach-omap2/board-am3517evm.c |   60 +++++++++++++++++++++++++++++++++
 1 files changed, 60 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/board-am3517evm.c b/arch/arm/mach-omap2/board-am3517evm.c
index 300b165..33d364a 100644
--- a/arch/arm/mach-omap2/board-am3517evm.c
+++ b/arch/arm/mach-omap2/board-am3517evm.c
@@ -20,6 +20,8 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/i2c/tsc2004.h>

 #include <mach/hardware.h>
 #include <mach/am35xx.h>
@@ -33,6 +35,59 @@

 #include "mux.h"

+/*
+ * TSC 2004 Support
+ */
+#define	GPIO_TSC2004_IRQ	65
+
+static int tsc2004_init_irq(void)
+{
+	int ret = 0;
+
+	ret = gpio_request(GPIO_TSC2004_IRQ, "tsc2004-irq");
+	if (ret < 0) {
+		printk(KERN_WARNING "failed to request GPIO#%d: %d\n",
+				GPIO_TSC2004_IRQ, ret);
+		return ret;
+	}
+
+	if (gpio_direction_input(GPIO_TSC2004_IRQ)) {
+		printk(KERN_WARNING "GPIO#%d cannot be configured as "
+				"input\n", GPIO_TSC2004_IRQ);
+		return -ENXIO;
+	}
+
+	omap_set_gpio_debounce(GPIO_TSC2004_IRQ, 1);
+	omap_set_gpio_debounce_time(GPIO_TSC2004_IRQ, 0xa);
+	return ret;
+}
+
+static void tsc2004_exit_irq(void)
+{
+	gpio_free(GPIO_TSC2004_IRQ);
+}
+
+static int tsc2004_get_irq_level(void)
+{
+	return gpio_get_value(GPIO_TSC2004_IRQ) ? 0 : 1;
+}
+
+struct tsc2004_platform_data am3517evm_tsc2004data = {
+	.model = 2004,
+	.x_plate_ohms = 180,
+	.get_pendown_state = tsc2004_get_irq_level,
+	.init_platform_hw = tsc2004_init_irq,
+	.exit_platform_hw = tsc2004_exit_irq,
+};
+
+static struct i2c_board_info __initdata am3517evm_tsc_i2c_boardinfo[] = {
+	{
+		I2C_BOARD_INFO("tsc2004", 0x4B),
+		.type		= "tsc2004",
+		.platform_data	= &am3517evm_tsc2004data,
+	},
+};
+
 static int __init am3517_evm_i2c_init(void)
 {
 	omap_register_i2c_bus(1, 400, NULL, 0);
@@ -90,6 +145,11 @@ static void __init am3517_evm_init(void)

 	omap_serial_init();
 	usb_ehci_init(&ehci_pdata);
+	/* TSC 2004 */
+	omap_mux_init_gpio(65, OMAP_PIN_INPUT_PULLUP);
+	am3517evm_tsc_i2c_boardinfo[0].irq = gpio_to_irq(GPIO_TSC2004_IRQ);
+	i2c_register_board_info(1, am3517evm_tsc_i2c_boardinfo,
+				ARRAY_SIZE(am3517evm_tsc_i2c_boardinfo));
 }

 static void __init am3517_evm_map_io(void)
--
1.6.2.4


^ permalink raw reply related	[flat|nested] 6+ messages in thread