i2c-nomadik: make i2c timeout specific per i2c bus

Add option to have different i2c timeout delay for different i2c buses
specified in platform data. Default to the old value unless specified.

Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 4 insertions, 6 deletions

diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index 182761eace80..3bf95b90abae 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -121,9 +121,6 @@ enum i2c_operation {
         I2C_READ = 0x01
 };
 
-/* controller response timeout in ms */
-#define I2C_TIMEOUT_MS  2000
-
 /**
  * struct i2c_nmk_client - client specific data
  * @slave_adr: 7-bit slave address
@@ -213,7 +210,7 @@ static int flush_i2c_fifo(struct nmk_i2c_dev *dev)
         writel((I2C_CR_FTX | I2C_CR_FRX), dev->virtbase + I2C_CR);
 
         for (i = 0; i < LOOP_ATTEMPTS; i++) {
-                timeout = jiffies + msecs_to_jiffies(I2C_TIMEOUT_MS);
+                timeout = jiffies + msecs_to_jiffies(dev->adap.timeout);
 
                 while (!time_after(jiffies, timeout)) {
                         if ((readl(dev->virtbase + I2C_CR) &
@@ -434,7 +431,7 @@ static int read_i2c(struct nmk_i2c_dev *dev)
                         dev->virtbase + I2C_IMSCR);
 
         timeout = wait_for_completion_interruptible_timeout(
-                &dev->xfer_complete, msecs_to_jiffies(I2C_TIMEOUT_MS));
+                &dev->xfer_complete, msecs_to_jiffies(dev->adap.timeout));
 
         if (timeout < 0) {
                 dev_err(&dev->pdev->dev,
@@ -498,7 +495,7 @@ static int write_i2c(struct nmk_i2c_dev *dev)
                         dev->virtbase + I2C_IMSCR);
 
         timeout = wait_for_completion_interruptible_timeout(
-                &dev->xfer_complete, msecs_to_jiffies(I2C_TIMEOUT_MS));
+                &dev->xfer_complete, msecs_to_jiffies(dev->adap.timeout));
 
         if (timeout < 0) {
                 dev_err(&dev->pdev->dev,
@@ -917,6 +914,7 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
         adap->owner     = THIS_MODULE;
         adap->class     = I2C_CLASS_HWMON | I2C_CLASS_SPD;
         adap->algo      = &nmk_i2c_algo;
+        adap->timeout   = pdata->timeout ? pdata->timeout : 20000;
         snprintf(adap->name, sizeof(adap->name),
                  "Nomadik I2C%d at %lx", pdev->id, (unsigned long)res->start);