diff options
Diffstat (limited to 'arch/arc/boot/dts/hsdk.dts')
| -rw-r--r-- | arch/arc/boot/dts/hsdk.dts | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts index 229d13adbce4..daeef4ab2df9 100644 --- a/arch/arc/boot/dts/hsdk.dts +++ b/arch/arc/boot/dts/hsdk.dts @@ -120,7 +120,17 @@ mmcclk_ciu: mmcclk-ciu { compatible = "fixed-clock"; - clock-frequency = <100000000>; + /* + * DW sdio controller has external ciu clock divider + * controlled via register in SDIO IP. Due to its + * unexpected default value (it should devide by 1 + * but it devides by 8) SDIO IP uses wrong clock and + * works unstable (see STAR 9001204800) + * So add temporary fix and change clock frequency + * from 100000000 to 12500000 Hz until we fix dw sdio + * driver itself. + */ + clock-frequency = <12500000>; #clock-cells = <0>; }; |