diff options
| author | Eddie James <eajames@linux.ibm.com> | 2023-06-12 14:56:50 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-13 09:42:54 +0200 |
| commit | a30f26dc3ad9a7d3675f75ae51d320fa771181d7 (patch) | |
| tree | a55eb2e5a17c41a08da19317223ab5cf6d258c6b | |
| parent | d020963638f2b918f72290afe1e4259bbdf0c2af (diff) | |
| download | linux-stable-a30f26dc3ad9a7d3675f75ae51d320fa771181d7.tar.gz linux-stable-a30f26dc3ad9a7d3675f75ae51d320fa771181d7.tar.bz2 linux-stable-a30f26dc3ad9a7d3675f75ae51d320fa771181d7.zip | |
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>
| -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 7cec1772820d..5eccab175e86 100644 --- a/drivers/fsi/fsi-master-aspeed.c +++ b/drivers/fsi/fsi-master-aspeed.c @@ -454,6 +454,8 @@ 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); trace_fsi_master_aspeed_cfam_reset(false); |