Input: s3c24xx_ts - Add FEAT for Samsung touchscreen support

This patch adds a feature bit field in the touchscreen driver for Samsung SoCs.
Which can be used to distinguish the TSADC module features.

Signed-off-by: Naveen Krishna Ch <ch.naveen@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
[ben-linux@fluff.org: minor fix to title]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Acked-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 12 insertions, 3 deletions

diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c
index 86086a42d5e..e0b7c834111 100644
--- a/drivers/input/touchscreen/s3c2410_ts.c
+++ b/drivers/input/touchscreen/s3c2410_ts.c
@@ -55,6 +55,8 @@
                          S3C2410_ADCTSC_AUTO_PST | \
                          S3C2410_ADCTSC_XY_PST(0))
 
+#define FEAT_PEN_IRQ    (1 << 0)        /* HAS ADCCLRINTPNDNUP */
+
 /* Per-touchscreen data. */
 
 /**
@@ -69,6 +71,7 @@
  * @irq_tc: The interrupt number for pen up/down interrupt
  * @count: The number of samples collected.
  * @shift: The log2 of the maximum count to read in one go.
+ * @features: The features supported by the TSADC MOdule.
  */
 struct s3c2410ts {
         struct s3c_adc_client *client;
@@ -81,6 +84,7 @@ struct s3c2410ts {
         int irq_tc;
         int count;
         int shift;
+        int features;
 };
 
 static struct s3c2410ts ts;
@@ -171,6 +175,11 @@ static irqreturn_t stylus_irq(int irq, void *dev_id)
         else
                 dev_info(ts.dev, "%s: count=%d\n", __func__, ts.count);
 
+        if (ts.features & FEAT_PEN_IRQ) {
+                /* Clear pen down/up interrupt */
+                writel(0x0, ts.io + S3C64XX_ADCCLRINTPNDNUP);
+        }
+
         return IRQ_HANDLED;
 }
 
@@ -317,6 +326,7 @@ static int __devinit s3c2410ts_probe(struct platform_device *pdev)
         ts.input->id.version = 0x0102;
 
         ts.shift = info->oversampling_shift;
+        ts.features = platform_get_device_id(pdev)->driver_data;
 
         ret = request_irq(ts.irq_tc, stylus_irq, IRQF_DISABLED,
                           "s3c2410_ts_pen", ts.input);
@@ -403,15 +413,14 @@ static struct dev_pm_ops s3c_ts_pmops = {
 #endif
 
 static struct platform_device_id s3cts_driver_ids[] = {
-        { "s3c2410-ts", 0 },
-        { "s3c2440-ts", 1 },
+        { "s3c64xx-ts", FEAT_PEN_IRQ },
         { }
 };
 MODULE_DEVICE_TABLE(platform, s3cts_driver_ids);
 
 static struct platform_driver s3c_ts_driver = {
         .driver         = {
-                .name   = "s3c24xx-ts",
+                .name   = "samsung-ts",
                 .owner  = THIS_MODULE,
 #ifdef CONFIG_PM
                 .pm     = &s3c_ts_pmops,