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Subject[PATCH v6 3/9] i2c: iproc: Add support for more master error status
Date
From: Michael Cheng <ccheng@broadcom.com>

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>
---
drivers/i2c/busses/i2c-bcm-iproc.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c
index 915c1b5aafd8..d64876cfa11c 100644
--- a/drivers/i2c/busses/i2c-bcm-iproc.c
+++ b/drivers/i2c/busses/i2c-bcm-iproc.c
@@ -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);

--
2.17.1
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