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| author |   Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com> | 2011-05-13 12:29:55 +0200 |
|---|---|---|
| committer |   Ben Dooks <ben-linux@fluff.org> | 2011-05-25 00:20:36 +0100 |
| commit | 4cb3f538cd88fddaa659a924e7abdb685cd5e784 (patch) | |
| tree | 997042532b54dad8e2ac6cd8c3583d4b59267865 /drivers/i2c | |
| parent | i2c-nomadik: correct adapter timeout initialization (diff) | |
| download | linux-dev-4cb3f538cd88fddaa659a924e7abdb685cd5e784.tar.xz linux-dev-4cb3f538cd88fddaa659a924e7abdb685cd5e784.zip | |
i2c-nomadik: print abort cause only on abort tag
Modify the code to:
1)Print the cause of i2c failure only if the status is set to ABORT.
2)Print slave address on send/receive fail, will help in which slave
failed.
Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-nomadik.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index 28389c29af75..c8bf81abcd3c 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -442,7 +442,8 @@ static int read_i2c(struct nmk_i2c_dev *dev) if (timeout == 0) { /* controller has timedout, re-init the h/w */ - dev_err(&dev->pdev->dev, "controller timed out, re-init h/w\n"); + dev_err(&dev->pdev->dev, "read from slave 0x%x timed out\n", + dev->cli.slave_adr); (void) init_hw(dev); status = -ETIMEDOUT; } @@ -506,7 +507,8 @@ static int write_i2c(struct nmk_i2c_dev *dev) if (timeout == 0) { /* controller has timedout, re-init the h/w */ - dev_err(&dev->pdev->dev, "controller timed out, re-init h/w\n"); + dev_err(&dev->pdev->dev, "write to slave 0x%x timed out\n", + dev->cli.slave_adr); (void) init_hw(dev); status = -ETIMEDOUT; } @@ -568,6 +570,7 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap, int i; u32 cause; struct nmk_i2c_dev *dev = i2c_get_adapdata(i2c_adap); + u32 i2c_sr; dev->busy = true; @@ -607,14 +610,22 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap, status = write_i2c(dev); } if (status || (dev->result)) { - /* get the abort cause */ - cause = (readl(dev->virtbase + I2C_SR) >> 4) & 0x7; - dev_err(&dev->pdev->dev, "%s\n", - cause >= ARRAY_SIZE(abort_causes) - ? "unknown reason" : abort_causes[cause]); + i2c_sr = readl(dev->virtbase + I2C_SR); + /* + * Check if the controller I2C operation status is set + * to ABORT(11b). + */ + if (((i2c_sr >> 2) & 0x3) == 0x3) { + /* get the abort cause */ + cause = (i2c_sr >> 4) + & 0x7; + dev_err(&dev->pdev->dev, "%s\n", cause >= + ARRAY_SIZE(abort_causes) ? + "unknown reason" : + abort_causes[cause]); + } status = status ? status : dev->result; - goto out; } udelay(I2C_DELAY); |