diff mbox

[v2,6/6] ARM: dts: dra76x: Add MCAN node

Message ID 20180530141133.3711-7-faiz_abbas@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Faiz Abbas May 30, 2018, 2:11 p.m. UTC
From: Franklin S Cooper Jr <fcooper@ti.com>

Add support for the MCAN peripheral which supports both classic
CAN messages along with the new CAN-FD message.

Add MCAN node to evm and enable it with a maximum datarate of 5 mbps

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
---
 arch/arm/boot/dts/dra76-evm.dts |  7 +++++++
 arch/arm/boot/dts/dra76x.dtsi   | 15 +++++++++++++++
 2 files changed, 22 insertions(+)

Comments

Tony Lindgren May 30, 2018, 3:07 p.m. UTC | #1
* Faiz Abbas <faiz_abbas@ti.com> [180530 14:12]:
> From: Franklin S Cooper Jr <fcooper@ti.com>
> 
> Add support for the MCAN peripheral which supports both classic
> CAN messages along with the new CAN-FD message.
...
> --- a/arch/arm/boot/dts/dra76x.dtsi
> +++ b/arch/arm/boot/dts/dra76x.dtsi
> @@ -27,6 +27,21 @@
>  			ti,syss-mask = <1>;
>  			clocks = <&wkupaon_clkctrl DRA7_ADC_CLKCTRL 0>;
>  			clock-names = "fck";
> +
> +			m_can0: mcan@42c01a00 {
> +				compatible = "bosch,m_can";
> +				reg = <0x1a00 0x4000>, <0x0 0x18FC>;
> +				reg-names = "m_can", "message_ram";
> +				interrupt-parent = <&gic>;
> +				interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
> +					     <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>;
> +				interrupt-names = "int0", "int1";
> +				ti,hwmods = "mcan";

The "ti,hwmods" should be in the parent node now. But you may not even need
it, see the reset comment I made for the parent node patch.

> +				clocks = <&mcan_clk>, <&l3_iclk_div>;
> +				clock-names = "cclk", "hclk";
> +				bosch,mram-cfg = <0x0 0 0 32 0 0 1 1>;
> +				status = "disabled";

And then you should be able to also leave out status = "disabled" as the
hardware is there for sure and we can idle it. Then a board specific
dts file can set it to "disabled" if reallly needed. Setting everything
manually to "disabled" and then again to "enabled" is the wrong way
around, the default is "enabled".

Regards,

Tony
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diff mbox

Patch

diff --git a/arch/arm/boot/dts/dra76-evm.dts b/arch/arm/boot/dts/dra76-evm.dts
index 2deb96405d06..277765257410 100644
--- a/arch/arm/boot/dts/dra76-evm.dts
+++ b/arch/arm/boot/dts/dra76-evm.dts
@@ -404,3 +404,10 @@ 
 	phys = <&pcie1_phy>, <&pcie2_phy>;
 	phy-names = "pcie-phy0", "pcie-phy1";
 };
+
+&m_can0 {
+	status = "okay";
+	can-transceiver {
+		max-bitrate = <5000000>;
+	};
+};
diff --git a/arch/arm/boot/dts/dra76x.dtsi b/arch/arm/boot/dts/dra76x.dtsi
index 57b8dc0fe719..d7a8cc569808 100644
--- a/arch/arm/boot/dts/dra76x.dtsi
+++ b/arch/arm/boot/dts/dra76x.dtsi
@@ -27,6 +27,21 @@ 
 			ti,syss-mask = <1>;
 			clocks = <&wkupaon_clkctrl DRA7_ADC_CLKCTRL 0>;
 			clock-names = "fck";
+
+			m_can0: mcan@42c01a00 {
+				compatible = "bosch,m_can";
+				reg = <0x1a00 0x4000>, <0x0 0x18FC>;
+				reg-names = "m_can", "message_ram";
+				interrupt-parent = <&gic>;
+				interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
+					     <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>;
+				interrupt-names = "int0", "int1";
+				ti,hwmods = "mcan";
+				clocks = <&mcan_clk>, <&l3_iclk_div>;
+				clock-names = "cclk", "hclk";
+				bosch,mram-cfg = <0x0 0 0 32 0 0 1 1>;
+				status = "disabled";
+			};
 		};
 	};