[PATCH] ARM: S3C64XX: Add s3c64xx support to touchscreen driver

[Maurus Cuelenaere <mcuelenaere@gmail.com>]

Add support for the s3c64xx touchscreen to the s3c2410_ts driver,
ensuring it compiles and supports the extra features such as the
interrupt generation.

Signed-off-by: Maurus Cuelenaere <mcuelenaere@gmail.com>
---
 drivers/input/touchscreen/Kconfig      |    6 +++---
 drivers/input/touchscreen/s3c2410_ts.c |   26 ++++++++++++++++++++++----
 2 files changed, 25 insertions(+), 7 deletions(-)

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 8a8fa4d..be8e9ba 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -158,11 +158,11 @@ config TOUCHSCREEN_FUJITSU
 	  module will be called fujitsu-ts.
 
 config TOUCHSCREEN_S3C2410
-	tristate "Samsung S3C2410 touchscreen input driver"
-	depends on ARCH_S3C2410
+	tristate "Samsung S3C touchscreen input driver"
+	depends on ARCH_S3C2410 || ARCH_S3C64XX
 	select S3C24XX_ADC
 	help
-	  Say Y here if you have the s3c2410 touchscreen.
+	  Say Y here if you have the s3c touchscreen.
 
 	  If unsure, say N.
 
diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c
index 98a7d12..66d1c83 100644
--- a/drivers/input/touchscreen/s3c2410_ts.c
+++ b/drivers/input/touchscreen/s3c2410_ts.c
@@ -87,6 +87,12 @@ struct s3c2410ts {
 
 static struct s3c2410ts ts;
 
+enum s3c_cpu_type {
+	TYPE_S3C2410,
+	TYPE_S3C2440,
+	TYPE_S3C64XX,
+};
+
 /**
  * s3c2410_ts_connect - configure gpio for s3c2410 systems
  *
@@ -96,10 +102,14 @@ static struct s3c2410ts ts;
 */
 static inline void s3c2410_ts_connect(void)
 {
+#ifdef PLAT_S3C24XX
+	/* As s3c2410_gpio_cfgpin() isn't defined for non-s3c24xx builds,
+	   guard these with an ifdef. */
 	s3c2410_gpio_cfgpin(S3C2410_GPG(12), S3C2410_GPG12_XMON);
 	s3c2410_gpio_cfgpin(S3C2410_GPG(13), S3C2410_GPG13_nXPON);
 	s3c2410_gpio_cfgpin(S3C2410_GPG(14), S3C2410_GPG14_YMON);
 	s3c2410_gpio_cfgpin(S3C2410_GPG(15), S3C2410_GPG15_nYPON);
+#endif
 }
 
 /**
@@ -170,6 +180,7 @@ static DEFINE_TIMER(touch_timer, touch_timer_fire, 0, 0);
  */
 static irqreturn_t stylus_irq(int irq, void *dev_id)
 {
+	struct platform_device *pdev = to_platform_device(ts.dev);
 	unsigned long data0;
 	unsigned long data1;
 	bool down;
@@ -188,6 +199,12 @@ static irqreturn_t stylus_irq(int irq, void *dev_id)
 	else
 		dev_info(ts.dev, "%s: count=%d\n", __func__, ts.count);
 
+
+	if (platform_get_device_id(pdev)->driver_data == TYPE_S3C64XX) {
+		/* Clear pen down/up interrupt */
+		writel(0x0, ts.io + S3C64XX_ADCCLRINTPNDNUP);
+	}
+
 	return IRQ_HANDLED;
 }
 
@@ -297,7 +314,7 @@ static int __devinit s3c2410ts_probe(struct platform_device *pdev)
 	}
 
 	/* Configure the touchscreen external FETs on the S3C2410 */
-	if (!platform_get_device_id(pdev)->driver_data)
+	if (platform_get_device_id(pdev)->driver_data == TYPE_S3C2410)
 		s3c2410_ts_connect();
 
 	ts.client = s3c_adc_register(pdev, s3c24xx_ts_select,
@@ -420,15 +437,16 @@ static struct dev_pm_ops s3c_ts_pmops = {
 #endif
 
 static struct platform_device_id s3cts_driver_ids[] = {
-	{ "s3c2410-ts", 0 },
-	{ "s3c2440-ts", 1 },
+	{ "s3c2410-ts", TYPE_S3C2410 },
+	{ "s3c2440-ts", TYPE_S3C2440 },
+	{ "s3c64xx-ts", TYPE_S3C64XX },
 	{ }
 };
 MODULE_DEVICE_TABLE(platform, s3cts_driver_ids);
 
 static struct platform_driver s3c_ts_driver = {
 	.driver         = {
-		.name   = "s3c24xx-ts",
+		.name   = "s3c-ts",
 		.owner  = THIS_MODULE,
 #ifdef CONFIG_PM
 		.pm	= &s3c_ts_pmops,
-- 
1.7.1