[PATCH v2 6/6] i2c: pasemi: Log bus reset causes

[Sven Peter via B4 Relay]

From: Hector Martin <mar...@marcan.st>

This ensures we get all information we need to debug issues when users
forward us their logs.

Signed-off-by: Hector Martin <mar...@marcan.st>
Reviewed-by: Neal Gompa <n...@gompa.dev>
Reviewed-by: Alyssa Rosenzweig <aly...@rosenzweig.io>
Signed-off-by: Sven Peter <s...@svenpeter.dev>
---
 drivers/i2c/busses/i2c-pasemi-core.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-pasemi-core.c 
b/drivers/i2c/busses/i2c-pasemi-core.c
index 
41db38d82fe62c73614b8fafe4cb73c7d1a24762..e5e8a748638f02e48d6ffa65e49aff5b12f70e06
 100644
--- a/drivers/i2c/busses/i2c-pasemi-core.c
+++ b/drivers/i2c/busses/i2c-pasemi-core.c
@@ -22,6 +22,7 @@
 /* Register offsets */
 #define REG_MTXFIFO    0x00
 #define REG_MRXFIFO    0x04
+#define REG_XFSTA      0x0c
 #define REG_SMSTA      0x14
 #define REG_IMASK      0x18
 #define REG_CTL                0x1c
@@ -89,7 +90,7 @@ static void pasemi_reset(struct pasemi_smbus *smbus)
 
 static int pasemi_smb_clear(struct pasemi_smbus *smbus)
 {
-       unsigned int status;
+       unsigned int status, xfstatus;
        int ret;
 
        /* First wait for the bus to go idle */
@@ -98,7 +99,9 @@ static int pasemi_smb_clear(struct pasemi_smbus *smbus)
                                 USEC_PER_MSEC, USEC_PER_MSEC * 
TRANSFER_TIMEOUT_MS);
 
        if (ret < 0) {
-               dev_err(smbus->dev, "Bus is still stuck (status 0x%08x)\n", 
status);
+               xfstatus = reg_read(smbus, REG_XFSTA);
+               dev_err(smbus->dev, "Bus is still stuck (status 0x%08x xfstatus 
0x%08x)\n",
+                        status, xfstatus);
                return -EIO;
        }
 

-- 
2.34.1