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| author | Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com> | 2018-07-17 16:24:43 +0200 |
|---|---|---|
| committer | Christoph Muellner <christoph.muellner@theobroma-systems.com> | 2019-04-30 20:01:59 +0200 |
| commit | 1c72e34163c78cb07ca2dbfc7766f576c9c52fa8 (patch) | |
| tree | 130f95e3b7889506cf802f2c939dcd2ee1480c14 /scripts/mkmultidtb.py | |
| parent | 9791560c9419a12248b2fe06aff24cf16334b238 (diff) | |
rk3399-puma.dts: reduce sd card max-frequency to 40MHz.
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.
Signed-off-by: Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>
Diffstat (limited to 'scripts/mkmultidtb.py')
0 files changed, 0 insertions, 0 deletions