[v2] Enable multiple MCAN on AM62x

[PATCH v2 3/4] DO_NOT_MERGE arm64: dts: ti: Add AM62x MCAN MAIN domain transceiver overlay

Posted by Judith Mendez 2 years, 7 months ago

Add an overlay for main domain MCAN on AM62x SK. The AM62x
SK board does not have on-board CAN transceiver so instead
of changing the DTB permanently, add an overlay to enable
MAIN domain MCAN and support for 1 CAN transceiver.

Signed-off-by: Judith Mendez <jm@ti.com>
---
 arch/arm64/boot/dts/ti/Makefile               |  2 ++
 .../boot/dts/ti/k3-am625-sk-mcan-main.dtso    | 35 +++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index c83c9d772b81..abe15e76b614 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -9,8 +9,10 @@
 # alphabetically.
 
 # Boards with AM62x SoC
+k3-am625-sk-mcan-dtbs := k3-am625-sk.dtb k3-am625-sk-mcan-main.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-beagleplay.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am625-sk-mcan.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am62-lp-sk.dtb
 
 # Boards with AM62Ax SoC
diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso b/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso
new file mode 100644
index 000000000000..0a7b2f394f87
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * DT overlay for MCAN transceiver in main domain on AM625 SK
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include "k3-pinctrl.h"
+
+&{/} {
+	transceiver1: can-phy0 {
+		compatible = "ti,tcan1042";
+		#phy-cells = <0>;
+		max-bitrate = <5000000>;
+	};
+};
+
+&main_pmx0 {
+	main_mcan0_pins_default: main-mcan0-pins-default {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x1dc, PIN_INPUT, 0) /* (E15) MCAN0_RX */
+			AM62X_IOPAD(0x1d8, PIN_OUTPUT, 0) /* (C15) MCAN0_TX */
+		>;
+	};
+};
+
+&main_mcan0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_mcan0_pins_default>;
+	phys = <&transceiver1>;
+};
-- 
2.17.1

Re: [PATCH v2 3/4] DO_NOT_MERGE arm64: dts: ti: Add AM62x MCAN MAIN domain transceiver overlay

Posted by Nishanth Menon 2 years, 7 months ago

On 14:54-20230424, Judith Mendez wrote:
> Add an overlay for main domain MCAN on AM62x SK. The AM62x
> SK board does not have on-board CAN transceiver so instead
> of changing the DTB permanently, add an overlay to enable
> MAIN domain MCAN and support for 1 CAN transceiver.
> 
> Signed-off-by: Judith Mendez <jm@ti.com>
> ---
>  arch/arm64/boot/dts/ti/Makefile               |  2 ++
>  .../boot/dts/ti/k3-am625-sk-mcan-main.dtso    | 35 +++++++++++++++++++
>  2 files changed, 37 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso
> 

Just a headsup - for a formal patch, for the overlay, please ensure we
provide link to the specific board. I dont want to end up with 1000s
of overlay files, each enabling one specific peripheral instance of a
small subgroup of peripheral instance. Overlays should be describing a
real platform with product link.

> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
> index c83c9d772b81..abe15e76b614 100644
> --- a/arch/arm64/boot/dts/ti/Makefile
> +++ b/arch/arm64/boot/dts/ti/Makefile
> @@ -9,8 +9,10 @@
>  # alphabetically.
>  
>  # Boards with AM62x SoC
> +k3-am625-sk-mcan-dtbs := k3-am625-sk.dtb k3-am625-sk-mcan-main.dtbo
>  dtb-$(CONFIG_ARCH_K3) += k3-am625-beagleplay.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb
> +dtb-$(CONFIG_ARCH_K3) += k3-am625-sk-mcan.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-am62-lp-sk.dtb
>  
>  # Boards with AM62Ax SoC
> diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso b/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso
> new file mode 100644
> index 000000000000..0a7b2f394f87
> --- /dev/null
> +++ b/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso
> @@ -0,0 +1,35 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/**
> + * DT overlay for MCAN transceiver in main domain on AM625 SK
> + *
> + * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include "k3-pinctrl.h"
> +
> +&{/} {
> +	transceiver1: can-phy0 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +	};
> +};
> +
> +&main_pmx0 {
> +	main_mcan0_pins_default: main-mcan0-pins-default {
> +		pinctrl-single,pins = <
> +			AM62X_IOPAD(0x1dc, PIN_INPUT, 0) /* (E15) MCAN0_RX */
> +			AM62X_IOPAD(0x1d8, PIN_OUTPUT, 0) /* (C15) MCAN0_TX */
> +		>;
> +	};
> +};
> +
> +&main_mcan0 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_mcan0_pins_default>;
> +	phys = <&transceiver1>;
> +};
> -- 
> 2.17.1
> 

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D

Re: [PATCH v2 3/4] DO_NOT_MERGE arm64: dts: ti: Add AM62x MCAN MAIN domain transceiver overlay

Posted by Mendez, Judith 2 years, 7 months ago

Hello Nishanth,

On 4/25/2023 7:47 AM, Nishanth Menon wrote:
> On 14:54-20230424, Judith Mendez wrote:
>> Add an overlay for main domain MCAN on AM62x SK. The AM62x
>> SK board does not have on-board CAN transceiver so instead
>> of changing the DTB permanently, add an overlay to enable
>> MAIN domain MCAN and support for 1 CAN transceiver.
>>
>> Signed-off-by: Judith Mendez <jm@ti.com>
>> ---
>>   arch/arm64/boot/dts/ti/Makefile               |  2 ++
>>   .../boot/dts/ti/k3-am625-sk-mcan-main.dtso    | 35 +++++++++++++++++++
>>   2 files changed, 37 insertions(+)
>>   create mode 100644 arch/arm64/boot/dts/ti/k3-am625-sk-mcan-main.dtso
>>
> 
> Just a headsup - for a formal patch, for the overlay, please ensure we
> provide link to the specific board. I dont want to end up with 1000s
> of overlay files, each enabling one specific peripheral instance of a
> small subgroup of peripheral instance. Overlays should be describing a
> real platform with product link.

Will add in the next submission, thanks.

regards,
Judith