On 17:31-20230501, Judith Mendez wrote: > On AM62x there are no hardware interrupts routed to A53 GIC > interrupt controller for MCU MCAN IPs, so MCU MCANs were not > added to the MCU dtsi. In this patch series an hrtimer is introduced > to MCAN driver to generate software interrupts. Now add MCU MCAN > nodes to the MCU dtsi but disable the MCAN devices by default. > > AM62x does not carry on-board CAN transceivers, so instead of > changing DTB permanently use an overlay to enable MCU MCANs and to > add CAN transceiver nodes. > > If there is no hardware interrupt and timer method is used, remove > interrupt properties and add poll-interval to enable the hrtimer > per MCAN node. > > This DT overlay can be used with the following EVM: > Link: https://www.ti.com/tool/TCAN1042DEVM > > Signed-off-by: Judith Mendez <jm@xxxxxx> > --- > Changelog: > v3: > 1. Add link for specific board > > arch/arm64/boot/dts/ti/Makefile | 2 +- > arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi | 24 ++++++++ > .../boot/dts/ti/k3-am625-sk-mcan-mcu.dtso | 57 +++++++++++++++++++ NAK - I dont see "DO NOT MERGE" in $subject. please send this patch addressing previous comments with arch maintainer tree not the mcan tree. > 3 files changed, 82 insertions(+), 1 deletion(-) > create mode 100644 arch/arm64/boot/dts/ti/k3-am625-sk-mcan-mcu.dtso > > diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile > index abe15e76b614..c76be3888e4d 100644 > --- a/arch/arm64/boot/dts/ti/Makefile > +++ b/arch/arm64/boot/dts/ti/Makefile > @@ -9,7 +9,7 @@ > # alphabetically. > > # Boards with AM62x SoC > -k3-am625-sk-mcan-dtbs := k3-am625-sk.dtb k3-am625-sk-mcan-main.dtbo > +k3-am625-sk-mcan-dtbs := k3-am625-sk.dtb k3-am625-sk-mcan-main.dtbo k3-am625-sk-mcan-mcu.dtbo > dtb-$(CONFIG_ARCH_K3) += k3-am625-beagleplay.dtb > dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb > dtb-$(CONFIG_ARCH_K3) += k3-am625-sk-mcan.dtb > diff --git a/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi > index 076601a41e84..20462f457643 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi > @@ -141,4 +141,28 @@ > /* Tightly coupled to M4F */ > status = "reserved"; > }; > + > + mcu_mcan1: can@4e00000 { > + compatible = "bosch,m_can"; > + reg = <0x00 0x4e00000 0x00 0x8000>, > + <0x00 0x4e08000 0x00 0x200>; > + reg-names = "message_ram", "m_can"; > + power-domains = <&k3_pds 188 TI_SCI_PD_EXCLUSIVE>; > + clocks = <&k3_clks 188 6>, <&k3_clks 188 1>; > + clock-names = "hclk", "cclk"; > + bosch,mram-cfg = <0x0 128 64 64 64 64 32 32>; > + status = "disabled"; > + }; > + > + mcu_mcan2: can@4e10000 { > + compatible = "bosch,m_can"; > + reg = <0x00 0x4e10000 0x00 0x8000>, > + <0x00 0x4e18000 0x00 0x200>; > + reg-names = "message_ram", "m_can"; > + power-domains = <&k3_pds 189 TI_SCI_PD_EXCLUSIVE>; > + clocks = <&k3_clks 189 6>, <&k3_clks 189 1>; > + clock-names = "hclk", "cclk"; > + bosch,mram-cfg = <0x0 128 64 64 64 64 32 32>; > + status = "disabled"; > + }; > }; > diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-mcu.dtso b/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-mcu.dtso > new file mode 100644 > index 000000000000..5145b3de4f9b > --- /dev/null > +++ b/arch/arm64/boot/dts/ti/k3-am625-sk-mcan-mcu.dtso > @@ -0,0 +1,57 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/** > + * DT overlay for MCAN in MCU domain on AM625 SK > + * > + * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/ > + */ > + > +/dts-v1/; > +/plugin/; > + > +#include "k3-pinctrl.h" > + > +&{/} { > + transceiver2: can-phy1 { > + compatible = "ti,tcan1042"; > + #phy-cells = <0>; > + max-bitrate = <5000000>; > + }; > + > + transceiver3: can-phy2 { > + compatible = "ti,tcan1042"; > + #phy-cells = <0>; > + max-bitrate = <5000000>; > + }; > +}; > + > +&mcu_pmx0 { > + mcu_mcan1_pins_default: mcu-mcan1-pins-default { > + pinctrl-single,pins = < > + AM62X_IOPAD(0x038, PIN_INPUT, 0) /* (B3) MCU_MCAN0_RX */ > + AM62X_IOPAD(0x034, PIN_OUTPUT, 0) /* (D6) MCU_MCAN0_TX */ > + >; > + }; > + > + mcu_mcan2_pins_default: mcu-mcan2-pins-default { > + pinctrl-single,pins = < > + AM62X_IOPAD(0x040, PIN_INPUT, 0) /* (D4) MCU_MCAN1_RX */ > + AM62X_IOPAD(0x03C, PIN_OUTPUT, 0) /* (E5) MCU_MCAN1_TX */ > + >; > + }; > +}; > + > +&mcu_mcan1 { > + poll-interval; > + pinctrl-names = "default"; > + pinctrl-0 = <&mcu_mcan1_pins_default>; > + phys = <&transceiver2>; > + status = "okay"; > +}; > + > +&mcu_mcan2 { > + poll-interval; > + pinctrl-names = "default"; > + pinctrl-0 = <&mcu_mcan2_pins_default>; > + phys = <&transceiver3>; > + status = "okay"; > +}; > -- > 2.17.1 > -- Regards, Nishanth Menon Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D
