Add support for onboard MCP2517FD SPI CAN transceiver attached to
SPI0 of RB3.
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
---
Change in v3:
- change underscore(_) to dash (-) in can-clock node name
- remove superfluous status = okay in can node
Changes in v2:
- add cs and pinctrl config
- remove misleading comment
arch/arm64/boot/dts/qcom/sdm845-db845c.dts | 32 ++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts
index 28fe45c5d516..d2ade684703d 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts
@@ -28,6 +28,13 @@ chosen {
stdout-path = "serial0:115200n8";
};
+ /* Fixed crystal oscillator dedicated to MCP2517FD */
+ clk40M: can-clock {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <40000000>;
+ };
+
dc12v: dc12v-regulator {
compatible = "regulator-fixed";
regulator-name = "DC12V";
@@ -746,6 +753,23 @@ codec {
};
};
+&spi0 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&qup_spi0_default>;
+ cs-gpios = <&tlmm 3 GPIO_ACTIVE_LOW>;
+
+ can@0 {
+ compatible = "microchip,mcp2517fd";
+ reg = <0>;
+ clocks = <&clk40M>;
+ interrupts-extended = <&tlmm 104 IRQ_TYPE_LEVEL_LOW>;
+ spi-max-frequency = <10000000>;
+ vdd-supply = <&vdc_5v>;
+ xceiver-supply = <&vdc_5v>;
+ };
+};
+
&spi2 {
/* On Low speed expansion */
label = "LS-SPI0";
@@ -1219,3 +1243,11 @@ ov7251_ep: endpoint {
};
};
};
+
+/* PINCTRL - additions to nodes defined in sdm845.dtsi */
+&qup_spi0_default {
+ config {
+ drive-strength = <6>;
+ bias-disable;
+ };
+};
--
2.34.1
