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authorVirupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>2011-05-13 12:29:12 +0200
committerBen Dooks <ben-linux@fluff.org>2011-05-25 00:20:13 +0100
commit9772760079253cd9a428434b43d415d18b152332 (patch)
tree1379806baba2f945e656bd8f86db91f2398c4bfc
parenta20d23945f30ec701a544fdd90d6537f4041af6f (diff)
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>
-rw-r--r--arch/arm/plat-nomadik/include/plat/i2c.h6
-rw-r--r--drivers/i2c/busses/i2c-nomadik.c10
2 files changed, 8 insertions, 8 deletions
diff --git a/arch/arm/plat-nomadik/include/plat/i2c.h b/arch/arm/plat-nomadik/include/plat/i2c.h
index 1621db67a53d..4ed4e27d1368 100644
--- a/arch/arm/plat-nomadik/include/plat/i2c.h
+++ b/arch/arm/plat-nomadik/include/plat/i2c.h
@@ -24,13 +24,15 @@ enum i2c_freq_mode {
* to the values of 14, 6, 2 for a 48 MHz i2c clk
* @tft: Tx FIFO Threshold in bytes
* @rft: Rx FIFO Threshold in bytes
+ * @timeout Slave response timeout(ms)
* @sm: speed mode
*/
struct nmk_i2c_controller {
unsigned long clk_freq;
unsigned short slsu;
- unsigned char tft;
- unsigned char rft;
+ unsigned char tft;
+ unsigned char rft;
+ int timeout;
enum i2c_freq_mode sm;
};
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);