renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-14 00:04:00 +08:00
Code

mmc: sdhci-msm: Clear tuning done flag while hs400 tuning

Browse Source 
Clear tuning_done flag while executing tuning to ensure vendor
specific HS400 settings are applied properly when the controller
is re-initialized in HS400 mode.

Without this, re-initialization of the qcom SDHC in HS400 mode fails
while resuming the driver from runtime-suspend or system-suspend.

Fixes: ff06ce4178 ("mmc: sdhci-msm: Add HS400 platform support")
Cc: stable@vger.kernel.org
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Link: https://lore.kernel.org/r/1590678838-18099-1-git-send-email-vbadigan@codeaurora.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Veerabhadrarao Badiganti 2020-05-28 20:43:52 +05:30 committed by Ulf Hansson
parent 254e175448
commit 9253d71011
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/mmc/host/sdhci-msm.c
View File

@ -1173,6 +1173,12 @@ static int sdhci_msm_execute_tuning(struct mmc_host *mmc, u32 opcode)
/* Clock-Data-Recovery used to dynamically adjust RX sampling point */
msm_host->use_cdr = true;
/*
* Clear tuning_done flag before tuning to ensure proper
* HS400 settings.
*/
msm_host->tuning_done = 0;
/*
* For HS400 tuning in HS200 timing requires:
* - select MCLK/2 in VENDOR_SPEC