| Message ID | 20200918174512.v2.2.I3c57d8b6d83d5bdad73a413eea1e249a98d11973@changeid (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | None | expand |
Quoting Douglas Anderson (2020-09-18 17:45:28) > As talked about in the patch ("arm64: dts: qcom: sc7180: Provide > pinconf for SPI to use GPIO for CS"), on some boards it makes much > more sense (and is much more efficient) to think of the SPI Chip > Select as a GPIO. Trogdor is one such board where the SPI parts don't > run in GSI mode and we do a lot of SPI traffic. > > Signed-off-by: Douglas Anderson <dianders@chromium.org> > --- Reviewed-by: Stephen Boyd <swboyd@chromium.org>
diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi index bf875589d364..0759896a0df5 100644 --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi @@ -776,7 +776,20 @@ &sdhc_2 { cd-gpios = <&tlmm 69 GPIO_ACTIVE_LOW>; }; +&spi0 { + pinctrl-0 = <&qup_spi0_cs_gpio>; + cs-gpios = <&tlmm 37 GPIO_ACTIVE_LOW>; +}; + +&spi6 { + pinctrl-0 = <&qup_spi6_cs_gpio>; + cs-gpios = <&tlmm 62 GPIO_ACTIVE_LOW>; +}; + ap_spi_fp: &spi10 { + pinctrl-0 = <&qup_spi10_cs_gpio>; + cs-gpios = <&tlmm 89 GPIO_ACTIVE_LOW>; + cros_ec_fp: ec@0 { compatible = "google,cros-ec-spi"; reg = <0>; @@ -937,7 +950,7 @@ pinconf { }; }; -&qup_spi0_default { +&qup_spi0_cs_gpio { pinconf { pins = "gpio34", "gpio35", "gpio36", "gpio37"; drive-strength = <2>; @@ -945,7 +958,7 @@ pinconf { }; }; -&qup_spi6_default { +&qup_spi6_cs_gpio { pinconf { pins = "gpio59", "gpio60", "gpio61", "gpio62"; drive-strength = <2>; @@ -953,7 +966,7 @@ pinconf { }; }; -&qup_spi10_default { +&qup_spi10_cs_gpio { pinconf { pins = "gpio86", "gpio87", "gpio88", "gpio89"; drive-strength = <2>;
As talked about in the patch ("arm64: dts: qcom: sc7180: Provide pinconf for SPI to use GPIO for CS"), on some boards it makes much more sense (and is much more efficient) to think of the SPI Chip Select as a GPIO. Trogdor is one such board where the SPI parts don't run in GSI mode and we do a lot of SPI traffic. Signed-off-by: Douglas Anderson <dianders@chromium.org> --- (no changes since v1) arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-)