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i2c: pasemi: Log bus reset causes

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

Signed-off-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20250427-pasemi-fixes-v3-4-af28568296c0@svenpeter.dev
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
This commit is contained in:
Hector Martin 2025-04-27 11:30:46 +00:00 committed by Andi Shyti
parent f4f64fa8a6
commit 090c3a4a26
1 changed files with 7 additions and 2 deletions
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9
drivers/i2c/busses/i2c-pasemi-core.c
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@ -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
@ -99,14 +100,18 @@ static int pasemi_smb_clear(struct pasemi_smbus *smbus)
USEC_PER_MSEC * PASEMI_TRANSFER_TIMEOUT_MS);
if (ret < 0) {
dev_err(smbus->dev, "Bus is still stuck (status 0x%08x)\n", status);
dev_err(smbus->dev, "Bus is still stuck (status 0x%08x xfstatus 0x%08x)\n",
status, reg_read(smbus, REG_XFSTA));
return -EIO;
}
/* If any badness happened or there is data in the FIFOs, reset the FIFOs */
if ((status & (SMSTA_MRNE | SMSTA_JMD | SMSTA_MTO | SMSTA_TOM | SMSTA_MTN | SMSTA_MTA)) ||
!(status & SMSTA_MTE))
!(status & SMSTA_MTE)) {
dev_warn(smbus->dev, "Issuing reset due to status 0x%08x (xfstatus 0x%08x)\n",
status, reg_read(smbus, REG_XFSTA));
pasemi_reset(smbus);
}
/* Clear the flags */
reg_write(smbus, REG_SMSTA, status);