linux-kernel - [PATCH v3] arm64: dts: qcom: db845c: Add support for MCP2517FD

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220421073438.1824061-1-vkoul@kernel.org>
Date:   Thu, 21 Apr 2022 13:04:38 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Manivannan Sadhasivam <mani@...nel.org>
Subject: [PATCH v3] arm64: dts: qcom: db845c: Add support for MCP2517FD

Add support for onboard MCP2517FD SPI CAN transceiver attached to
SPI0 of RB3.

Signed-off-by: Vinod Koul <vkoul@...nel.org>
---
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