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ramips: speed up spi frequency for Youku YK-L1

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Youku YK-L1 has a huge storage space up to 32 MB. It is better to
use a higher spi clock to read or write serial nor flash chips.
Youku YK-L1 has Winbond w25q256fvfg on board that can support
104 MHz spi clock so 48 MHz is safe enough.
The real frequency can only be sysclk(580MHz ) /3 /(2^n) so 80 MHz
defined in dts file will set only 48 MHz in spi bus.

Signed-off-by: Shiji Yang <yangshiji66@qq.com>
(cherry picked from commit bf7ddb18f1bfa0b61b4dc43732c114f20900bd4b)
This commit is contained in:
Shiji Yang 2021-03-21 22:43:59 +08:00 committed by Petr Štetiar
parent bea1891182
commit 92489b4f82
1 changed files with 1 additions and 1 deletions
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2
target/linux/ramips/dts/mt7620a_youku_yk1.dts
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@ -70,7 +70,7 @@
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <25000000>;
spi-max-frequency = <80000000>;
m25p,fast-read;
partitions {