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    Subject[PATCH v1 1/6] i2c: iproc: handle Master aborted error
    Date
    Handle Master aborted error by flushing tx and rx fifo
    and reinitializing the hw.

    Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
    ---
    drivers/i2c/busses/i2c-bcm-iproc.c | 8 +++++---
    1 file changed, 5 insertions(+), 3 deletions(-)

    diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c
    index d8295b1c379d..834a98caeada 100644
    --- a/drivers/i2c/busses/i2c-bcm-iproc.c
    +++ b/drivers/i2c/busses/i2c-bcm-iproc.c
    @@ -93,6 +93,7 @@
    #define S_CMD_STATUS_MASK 0x07
    #define S_CMD_STATUS_SUCCESS 0x0
    #define S_CMD_STATUS_TIMEOUT 0x5
    +#define S_CMD_STATUS_MASTER_ABORT 0x7

    #define IE_OFFSET 0x38
    #define IE_M_RX_FIFO_FULL_SHIFT 31
    @@ -311,9 +312,10 @@ static void bcm_iproc_i2c_check_slave_status(
    return;

    val = (val >> S_CMD_STATUS_SHIFT) & S_CMD_STATUS_MASK;
    - if (val == S_CMD_STATUS_TIMEOUT) {
    - dev_err(iproc_i2c->device, "slave random stretch time timeout\n");
    -
    + if (val == S_CMD_STATUS_TIMEOUT || val == S_CMD_STATUS_MASTER_ABORT) {
    + dev_err(iproc_i2c->device, (val == S_CMD_STATUS_TIMEOUT) ?
    + "slave random stretch time timeout\n" :
    + "Master aborted read transaction\n");
    /* re-initialize i2c for recovery */
    bcm_iproc_i2c_enable_disable(iproc_i2c, false);
    bcm_iproc_i2c_slave_init(iproc_i2c, true);
    --
    2.17.1
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