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i2c: iproc: Add support for more master error status 

Add support for more master error status including FIFO underrun and RX
FIFO full

Signed-off-by: Michael Cheng <ccheng@broadcom.com>
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Michael Cheng 2019-04-02 18:18:24 -07:00 committed by Wolfram Sang
parent f34b8d9093
commit 1b23fa2e18
1 changed files with 10 additions and 0 deletions
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10
drivers/i2c/busses/i2c-bcm-iproc.c
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@ -73,6 +73,8 @@
#define M_CMD_STATUS_NACK_ADDR 0x2
#define M_CMD_STATUS_NACK_DATA 0x3
#define M_CMD_STATUS_TIMEOUT 0x4
#define M_CMD_STATUS_FIFO_UNDERRUN 0x5
#define M_CMD_STATUS_RX_FIFO_FULL 0x6
#define M_CMD_PROTOCOL_SHIFT 9
#define M_CMD_PROTOCOL_MASK 0xf
#define M_CMD_PROTOCOL_BLK_WR 0x7
@ -536,6 +538,14 @@ static int bcm_iproc_i2c_check_status(struct bcm_iproc_i2c_dev *iproc_i2c,
dev_dbg(iproc_i2c->device, "bus timeout\n");
return -ETIMEDOUT;
case M_CMD_STATUS_FIFO_UNDERRUN:
dev_dbg(iproc_i2c->device, "FIFO under-run\n");
return -ENXIO;
case M_CMD_STATUS_RX_FIFO_FULL:
dev_dbg(iproc_i2c->device, "RX FIFO full\n");
return -ETIMEDOUT;
default:
dev_dbg(iproc_i2c->device, "unknown error code=%d\n", val);