Input: ucb1400_ts - allow passing IRQ through platfrom_data

This patch allows UCB1400 to get IRQ GPIO from platform data. In case
platform_data are not supplied or the IRQ supplied in the platform_data
is negative, fall back to the old IRQ detection algorithm.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

3 files changed, 18 insertions, 4 deletions

diff --git a/drivers/input/touchscreen/ucb1400_ts.c b/drivers/input/touchscreen/ucb1400_ts.c
index 095f84b1f56e..89dcbe7b4b02 100644
--- a/drivers/input/touchscreen/ucb1400_ts.c
+++ b/drivers/input/touchscreen/ucb1400_ts.c
@@ -355,10 +355,13 @@ static int ucb1400_ts_probe(struct platform_device *dev)
                 goto err;
         }
 
-        error = ucb1400_ts_detect_irq(ucb);
-        if (error) {
-                printk(KERN_ERR "UCB1400: IRQ probe failed\n");
-                goto err_free_devs;
+        /* Only in case the IRQ line wasn't supplied, try detecting it */
+        if (ucb->irq < 0) {
+                error = ucb1400_ts_detect_irq(ucb);
+                if (error) {
+                        printk(KERN_ERR "UCB1400: IRQ probe failed\n");
+                        goto err_free_devs;
+                }
         }
 
         init_waitqueue_head(&ucb->ts_wait);
diff --git a/drivers/mfd/ucb1400_core.c b/drivers/mfd/ucb1400_core.c
index fa294b6d600a..85fd9421be94 100644
--- a/drivers/mfd/ucb1400_core.c
+++ b/drivers/mfd/ucb1400_core.c
@@ -51,6 +51,7 @@ static int ucb1400_core_probe(struct device *dev)
         struct ucb1400_ts ucb_ts;
         struct ucb1400_gpio ucb_gpio;
         struct snd_ac97 *ac97;
+        struct ucb1400_pdata *pdata = dev->platform_data;
 
         memset(&ucb_ts, 0, sizeof(ucb_ts));
         memset(&ucb_gpio, 0, sizeof(ucb_gpio));
@@ -88,6 +89,12 @@ static int ucb1400_core_probe(struct device *dev)
 
         /* TOUCHSCREEN */
         ucb_ts.ac97 = ac97;
+
+        if (pdata != NULL && pdata->irq >= 0)
+                ucb_ts.irq = pdata->irq;
+        else
+                ucb_ts.irq = -1;
+
         ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1);
         if (!ucb->ucb1400_ts) {
                 err = -ENOMEM;
diff --git a/include/linux/ucb1400.h b/include/linux/ucb1400.h
index adb44066680c..1b4790911052 100644
--- a/include/linux/ucb1400.h
+++ b/include/linux/ucb1400.h
@@ -110,6 +110,10 @@ struct ucb1400 {
         struct platform_device  *ucb1400_gpio;
 };
 
+struct ucb1400_pdata {
+        int     irq;
+};
+
 static inline u16 ucb1400_reg_read(struct snd_ac97 *ac97, u16 reg)
 {
         return ac97->bus->ops->read(ac97, reg);