| Message ID | 20230815154412.713846-4-hsinyi@chromium.org |
|---|---|
| State | New |
| Headers | show |
| Series | Add a property to override the quad mode | expand |
On 8/15/23 18:31, Hsin-Yi Wang wrote: > Some of the SKUs are using gigadevice gd25lq64c flash chip. The chip > default enables quad mode, which results in the write protect pin set to > IO pin. In mt8183 kukui, we won't use quad enable for all SKUs, so apply > the property to disable spi nor's quad mode. Hi Hsin-Yi, To me this property, and the way you 'apply' it, makes me think that you are using the devicetree as a configuration and not a description of the hardware itself. I think the driver should decide whether to use quad or not depending on the situation or the pinout of the device (as in your case quad mode overlaps with the WP pin) Eugen > > Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> > --- > arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi > index 6ce16a265e053..8e4761e2b8ff4 100644 > --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi > +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi > @@ -877,6 +877,7 @@ w25q64dw: flash@0 { > compatible = "winbond,w25q64dw", "jedec,spi-nor"; > reg = <0>; > spi-max-frequency = <25000000>; > + disable-quad-mode; > }; > }; >
diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi index 6ce16a265e053..8e4761e2b8ff4 100644 --- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi @@ -877,6 +877,7 @@ w25q64dw: flash@0 { compatible = "winbond,w25q64dw", "jedec,spi-nor"; reg = <0>; spi-max-frequency = <25000000>; + disable-quad-mode; }; };
Some of the SKUs are using gigadevice gd25lq64c flash chip. The chip default enables quad mode, which results in the write protect pin set to IO pin. In mt8183 kukui, we won't use quad enable for all SKUs, so apply the property to disable spi nor's quad mode. Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> --- arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 1 + 1 file changed, 1 insertion(+)