diff options
| author | Jonas Karlman <jonas@kwiboo.se> | 2025-02-04 21:38:43 +0000 |
|---|---|---|
| committer | Kever Yang <kever.yang@rock-chips.com> | 2025-02-19 23:26:40 +0800 |
| commit | d69097683d65652554639e9ff8cdb53e6e3ee63b (patch) | |
| tree | 4f7f6446ce3d0599441c53c1c55516689d2a420c /lib/efi_loader/efi_var_mem.c | |
| parent | 8d25dbb725fd07ff43efc7cca80a56b04c48eb06 (diff) | |
arm64: dts: rockchip: Fix sdmmc access on rk3308-rock-s0 v1.1 boards
BootROM leave GPIO4_D6 configured as SDMMC_PWREN function and DW MCI
driver set PRWEN high on MMC_POWER_UP and low on MMC_POWER_OFF.
Similarly U-Boot also set PRWEN high before accessing mmc.
However, HW revision prior to v1.2 must pull GPIO4_D6 low to access
sdmmc. For HW revision v1.2 the state of GPIO4_D6 has no impact.
Model an always-on active low fixed regulator using GPIO4_D6 to fix
use of sdmmc on older HW revisions of the board.
Fixes: adeb5d2a4ba4 ("arm64: dts: rockchip: Add Radxa ROCK S0")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20241119230838.4137130-1-jonas@kwiboo.se
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
[ upstream commit: 26c100232b09ced0857306ac9831a4fa9c9aa231 ]
(cherry picked from commit ca8e0bedbc790b19b11efc223677d178b8eeb74e)
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Diffstat (limited to 'lib/efi_loader/efi_var_mem.c')
0 files changed, 0 insertions, 0 deletions