ARM: mach-shmobile: ap4evb: modify touchpanel judgment condition

Current touchpanel had below 2 issues

- LCDD2 pin which is needed for WVGA was changed to
  IRQ28_123 pin on ts_get_pendown_state

- GPIO pull up on ts_init was disabled by gpio_request
  on ts_get_pendown_state.
  This mean the return value from gpio_get_value is untrusted.

This patch solve these issues

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 35 insertions, 3 deletions

diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 005337904ad5..3dd76f0106ca 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -834,11 +834,45 @@ static void __init gpio_no_direction(u32 addr)
 }
 
 /* TouchScreen */
+#ifdef CONFIG_AP4EVB_QHD
+# define GPIO_TSC_IRQ   GPIO_FN_IRQ28_123
+# define GPIO_TSC_PORT  GPIO_PORT123
+#else /* WVGA */
+# define GPIO_TSC_IRQ   GPIO_FN_IRQ7_40
+# define GPIO_TSC_PORT  GPIO_PORT40
+#endif
+
 #define IRQ28   evt2irq(0x3380) /* IRQ28A */
 #define IRQ7    evt2irq(0x02e0) /* IRQ7A */
+static int ts_get_pendown_state(void)
+{
+        int val;
+
+        gpio_free(GPIO_TSC_IRQ);
+
+        gpio_request(GPIO_TSC_PORT, NULL);
+
+        gpio_direction_input(GPIO_TSC_PORT);
+
+        val = gpio_get_value(GPIO_TSC_PORT);
+
+        gpio_request(GPIO_TSC_IRQ, NULL);
+
+        return !val;
+}
+
+static int ts_init(void)
+{
+        gpio_request(GPIO_TSC_IRQ, NULL);
+
+        return 0;
+}
+
 static struct tsc2007_platform_data tsc2007_info = {
         .model                  = 2007,
-        .x_plate_ohms           = 1000,
+        .x_plate_ohms           = 180,
+        .get_pendown_state      = ts_get_pendown_state,
+        .init_platform_hw       = ts_init,
 };
 
 static struct i2c_board_info tsc_device = {
@@ -1015,7 +1049,6 @@ static void __init ap4evb_init(void)
         gpio_request(GPIO_FN_KEYIN4,     NULL);
 
         /* enable TouchScreen */
-        gpio_request(GPIO_FN_IRQ28_123, NULL);
         set_irq_type(IRQ28, IRQ_TYPE_LEVEL_LOW);
 
         tsc_device.irq = IRQ28;
@@ -1072,7 +1105,6 @@ static void __init ap4evb_init(void)
         lcdc_info.ch[0].lcd_size_cfg.height     = 91;
 
         /* enable TouchScreen */
-        gpio_request(GPIO_FN_IRQ7_40, NULL);
         set_irq_type(IRQ7, IRQ_TYPE_LEVEL_LOW);
 
         tsc_device.irq = IRQ7;