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i2c: iproc: handle Master aborted error

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Handle Master aborted error by flushing tx and rx fifo
and reinitializing the hw.

Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Acked-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Rayagonda Kokatanur 2020-11-02 09:24:28 +05:30 committed by Wolfram Sang
parent 9c975c432b
commit 1ca1b45160
1 changed files with 5 additions and 3 deletions
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8
drivers/i2c/busses/i2c-bcm-iproc.c
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@ -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);