AcoSail/kernel_optimize_test
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i2c-nomadik: make i2c timeout specific per i2c bus

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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 committed by Ben Dooks
parent a20d23945f
commit 9772760079
2 changed files with 8 additions and 8 deletions
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6
arch/arm/plat-nomadik/include/plat/i2c.h
View File

@ -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
View File

@ -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);