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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>
This commit is contained in:
Virupax Sadashivpetimath 2011-05-13 12:29:12 +02:00 коммит произвёл Ben Dooks
Родитель a20d23945f
Коммит 9772760079
2 изменённых файлов: 8 добавлений и 8 удалений
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6
arch/arm/plat-nomadik/include/plat/i2c.h
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@ -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;
};

10
drivers/i2c/busses/i2c-nomadik.c
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@ -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);