mmc: sdhci: Fix HISPD bit handling
authorJagan Teki <jagan@amarulasolutions.com>
Thu, 18 Jun 2020 14:03:12 +0000 (19:33 +0530)
committerPeng Fan <peng.fan@nxp.com>
Wed, 24 Jun 2020 06:05:30 +0000 (14:05 +0800)
commitf12341a9529540113f01989149bbbeb68662a829
tree862b32fcb9d807e3b9048e67a40bea1a72a8ed01
parentfe95905ffed57d617cad81a71ac419d53aaa1ebf
mmc: sdhci: Fix HISPD bit handling

SDHCI HISPD bits need to be configured based on desired mmc
timings mode and some HISPD quirks.

So, handle the HISPD bit based on the mmc computed selected
mode(timing parameter) rather than fixed mmc card clock
frequency.

Linux handle the HISPD similar like this in below commit but no
SDHCI_QUIRK_BROKEN_HISPD_MODE,

commit <501639bf2173> ("mmc: sdhci: fix SDHCI_QUIRK_NO_HISPD_BIT handling")

This eventually fixed the mmc write issue observed in
rk3399 sdhci controller.

Bug log for refernece,
=> gpt write mmc 0 $partitions
Writing GPT: mmc write failed
** Can't write to device 0 **
** Can't write to device 0 **
error!

Cc: Kever Yang <kever.yang@rock-chips.com>
Cc: Peng Fan <peng.fan@nxp.com>
Peng Fan: added back "ctrl &= ~SDHCI_CTRL_HISPD;" per Jaehoon's suggestion
Tested-by: Suniel Mahesh <sunil@amarulasolutions.com> # roc-rk3399-pc
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
drivers/mmc/sdhci.c