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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2010-09-14 17:28:55 +0900
committerPaul Mundt <lethal@linux-sh.org>2010-09-14 17:28:55 +0900
commit52d5ac0073eb5faf284574bd98a25a65053eaae0 (patch)
tree7407911d3c79cec7bce3e42bcafd897a3582f2d4 /arch
parenta91a2d06c9797c0a533a71dbeea37b2d5a60c7f5 (diff)
downloadop-kernel-dev-52d5ac0073eb5faf284574bd98a25a65053eaae0.zip
op-kernel-dev-52d5ac0073eb5faf284574bd98a25a65053eaae0.tar.gz
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-shmobile/board-ap4evb.c38
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 0053379..3dd76f0 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;
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