diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2022-06-25 15:17:22 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2022-07-12 12:31:32 +0200 |
| commit | 2e586f8a5b0ed4a525014a692923ac96f6647816 (patch) | |
| tree | 529e312b952149bb37f65b0350d3b81c2c414886 /drivers/mmc/host/tmio_mmc.c | |
| parent | aabf199c4eff56e8b36a4c2807c041d93b20c1e1 (diff) | |
mmc: tmio: avoid glitches when resetting
If we reset because of an error, we need to preserve values for the
clock frequency. Otherwise, glitches may be seen on the bus.
To achieve that, we introduce a 'preserve' parameter to the reset
function and the IP core specific reset callbacks to handle everything
accordingly.
Reported-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20220625131722.1397-1-wsa@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/tmio_mmc.c')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c index b55a29c53d9c..53a2ad9a24b8 100644 --- a/drivers/mmc/host/tmio_mmc.c +++ b/drivers/mmc/host/tmio_mmc.c @@ -75,7 +75,7 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host, tmio_mmc_clk_start(host); } -static void tmio_mmc_reset(struct tmio_mmc_host *host) +static void tmio_mmc_reset(struct tmio_mmc_host *host, bool preserve) { sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000); usleep_range(10000, 11000); |