diff options
| author | Eddie James <eajames@linux.ibm.com> | 2023-06-12 22:56:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-19 13:20:18 +0300 |
| commit | b374b039e066115a1e6cd8483ec914856720b87e (patch) | |
| tree | bb88ac88274086158d47755c89e45133cca233b7 /drivers/fsi/fsi-master-aspeed.c | |
| parent | f8949c06c7359847a0d51ed97c23b89a27fb1a35 (diff) | |
| download | linux-b374b039e066115a1e6cd8483ec914856720b87e.tar.xz | |
fsi: aspeed: Reset master errors after CFAM reset
[ Upstream commit 52300909f4670ac552bfeb33c1355b896eac8c06 ]
It has been observed that sometimes the FSI master will return all 0xffs
after a CFAM has been taken out of reset, without presenting any error.
Resetting the FSI master errors resolves the issue.
Fixes: 4a851d714ead ("fsi: aspeed: Support CFAM reset GPIO")
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20230612195657.245125-8-eajames@linux.ibm.com
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/fsi/fsi-master-aspeed.c')
| -rw-r--r-- | drivers/fsi/fsi-master-aspeed.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c index 87edc77260d2..db0519da0f89 100644 --- a/drivers/fsi/fsi-master-aspeed.c +++ b/drivers/fsi/fsi-master-aspeed.c @@ -445,6 +445,8 @@ static ssize_t cfam_reset_store(struct device *dev, struct device_attribute *att gpiod_set_value(aspeed->cfam_reset_gpio, 1); usleep_range(900, 1000); gpiod_set_value(aspeed->cfam_reset_gpio, 0); + usleep_range(900, 1000); + opb_writel(aspeed, ctrl_base + FSI_MRESP0, cpu_to_be32(FSI_MRESP_RST_ALL_MASTER)); mutex_unlock(&aspeed->lock); return count; |