diff options
| author | Jakob Unterwurzacher <[email protected]> | 2022-10-19 16:27:27 +0200 |
|---|---|---|
| committer | Heiko Stuebner <[email protected]> | 2022-10-20 11:48:15 +0200 |
| commit | 91e8b74fe6381e083f8aa55217bb0562785ab398 (patch) | |
| tree | ce62be74c28847c438497d3fc33f65dc329f6796 /lib/mpi/mpi-mod.c | |
| parent | 849c19d14940b87332d5d59c7fc581d73f2099fd (diff) | |
arm64: dts: rockchip: lower rk3399-puma-haikou SD controller clock frequency
CRC errors (code -84 EILSEQ) have been observed for some SanDisk
Ultra A1 cards when running at 50MHz.
Waveform analysis suggest that the level shifters that are used on the
RK3399-Q7 module for voltage translation between 3.0 and 3.3V don't
handle clock rates at or above 48MHz properly. Back off to 40MHz for
some safety margin.
Cc: [email protected]
Fixes: 60fd9f72ce8a ("arm64: dts: rockchip: add Haikou baseboard with RK3399-Q7 SoM")
Signed-off-by: Jakob Unterwurzacher <[email protected]>
Signed-off-by: Quentin Schulz <[email protected]>
Link: https://lore.kernel.org/r/20221019-upstream-puma-sd-40mhz-v1-0-754a76421518@theobroma-systems.com
Signed-off-by: Heiko Stuebner <[email protected]>
Diffstat (limited to 'lib/mpi/mpi-mod.c')
0 files changed, 0 insertions, 0 deletions