Messages in this thread | | | Date | Fri, 15 Dec 2023 19:15:05 +0100 | From | Dragan Simic <> | Subject | Re: [PATCH] arm64: dts: rockchip: Increase maximum frequency of SPI flash for ROCK Pi 4A/B/C |
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On 2023-12-15 13:28, Stefan Nagy wrote: > The ROCK Pi 4A/B/C boards come with a 32 Mbit SPI NOR flash chip (XTX > Technology Limited XT25F32) which has a maximum clock frequency of 108 > MHz. However, the Rockchip SPI controller driver limits the maximum > SPI clock frequency to 50 MHz. Use this limit for spi-max-freq. > > This patch has been tested on ROCK Pi 4A. > > Signed-off-by: Stefan Nagy <stefan.nagy@ixypsilon.net> > --- > arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts | 2 +- > arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts | 2 +- > arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts | 2 +- > 3 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts > b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts > index d5df8939a..30e63e62a 100644 > --- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts > +++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts > @@ -19,6 +19,6 @@ &spi1 { > flash@0 { > compatible = "jedec,spi-nor"; > reg = <0>; > - spi-max-frequency = <10000000>; > + spi-max-frequency = <50000000>; > }; > }; > diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts > b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts > index bee6d7588..7122bf6c0 100644 > --- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts > +++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts > @@ -37,7 +37,7 @@ &spi1 { > flash@0 { > compatible = "jedec,spi-nor"; > reg = <0>; > - spi-max-frequency = <10000000>; > + spi-max-frequency = <50000000>; > }; > }; > > diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts > b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts > index de2ebe4cb..8af75bc7c 100644 > --- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts > +++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts > @@ -49,7 +49,7 @@ &spi1 { > flash@0 { > compatible = "jedec,spi-nor"; > reg = <0>; > - spi-max-frequency = <10000000>; > + spi-max-frequency = <50000000>; > }; > };
It would be better to upstream these changes to the Linux kernel first, and then sync them back to U-Boot.
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