Hi.
In the old version(6.2) of psdkla, I had to patch the dts files to use MCU MCAN0. I have referenced the page below.
https://e2e.ti.com/support/processors/f/791/p/940691/3486715?tisearch=e2e-sitesearch&keymatch=tda4x%25252520patch%25252520MCAN#3486715
After updating psdkla to ver7.1.0, I tried patching the same previous to test the can external loop-back on EVM.
I attached the patch file. (you should remove .txt in the filename)
From 0b8f70468ccf7ceb18a314ab784047c3a78a8c48 Mon Sep 17 00:00:00 2001
From: Karan Saxena <karan@ti.com>
Date: Mon, 29 Jun 2020 20:42:52 +0530
Subject: [PATCH] dts: Add MCAN0 and MCAN2 support in linux
- Add PINMUX for CAN TX and CAN RX
- Enable transceivers for MCAN0 and MCAN1
Signed-off-by: Karan Saxena <karan@ti.com>
---
.../boot/dts/ti/k3-j721e-common-proc-board.dts | 82 ++++++++++++++++++++++
arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 29 ++++++++
2 files changed, 111 insertions(+)
diff --git a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
index 0bc4805..79e6926 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
@@ -208,6 +208,7 @@
};
&wkup_pmx0 {
+
mcu_cpsw_pins_default: mcu_cpsw_pins_default {
pinctrl-single,pins = <
J721E_WKUP_IOPAD(0x0058, PIN_OUTPUT, 0) /* MCU_RGMII1_TX_CTL */
@@ -315,7 +316,46 @@
status = "disabled";
};
+&m_can0 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&mcan0_gpio_pins_default>;
+ can-transceiver {
+ max-bitrate = <5000000>;
+ };
+};
+
+&m_can2 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&mcan2_gpio_pins_default &mygpio1_pins_default>;
+ can-transceiver {
+ max-bitrate = <5000000>;
+ };
+};
+
&main_pmx0 {
+
+ mygpio1_pins_default: mygpio1_pins_default {
+ pinctrl-single,pins = <
+ J721E_IOPAD(0x200, PIN_INPUT, 7) /* (AC4) UART1_CTSn.GPIO0_127 */
+ >;
+ };
+
+ mcan0_gpio_pins_default: mcan0_gpio_pins_default {
+ pinctrl-single,pins = <
+ J721E_IOPAD(0x0208, PIN_INPUT, 0) /* (W5) MCAN0_RX:GPIO1_1 */
+ J721E_IOPAD(0x020c, PIN_OUTPUT, 0) /* (W6) MCAN0_TX:GPIO1_2 */
+ >;
+ };
+
+ mcan2_gpio_pins_default: mcan2_gpio_pins_default {
+ pinctrl-single,pins = <
+ J721E_IOPAD(0x01f0, PIN_INPUT, 3) /* (AC2) MCAN2_RX.GPIO0_123 */
+ J721E_IOPAD(0x01f4, PIN_OUTPUT, 3) /* (AB1) MCAN2_TX.GPIO0_124 */
+ >;
+ };
+
main_i2c1_exp4_pins_default: main-i2c1-exp4-pins-default {
pinctrl-single,pins = <
J721E_IOPAD(0x230, PIN_INPUT, 7) /* (U2) ECAP0_IN_APWM_OUT.GPIO1_11 */
@@ -483,6 +523,22 @@
gpio-controller;
#gpio-cells = <2>;
+ p06 {
+ /* P06 - MCAN0_EN */
+ gpio-hog;
+ gpios = <6 GPIO_ACTIVE_HIGH>;
+ output-high;
+ line-name = "MCAN0_EN";
+ };
+
+ p07 {
+ /* P07 - MCAN0_STB# */
+ gpio-hog;
+ gpios = <7 GPIO_ACTIVE_HIGH>;
+ output-high;
+ line-name = "MCAN0_STB#";
+ };
+
p09 {
/* P11 - MCASP/TRACE_MUX_S0 */
gpio-hog;
@@ -498,9 +554,35 @@
output-high;
line-name = "MCASP/TRACE_MUX_S1";
};
+
+ p13 {
+ /* P13 - MLB_MUX_SEL */
+ gpio-hog;
+ gpios = <11 GPIO_ACTIVE_HIGH>;
+ output-low;
+ line-name = "MLB_MUX_SEL";
+ };
+
+ p14 {
+ /* P14 - MCAN_MUX_SEL */
+ gpio-hog;
+ gpios = <12 GPIO_ACTIVE_HIGH>;
+ output-low;
+ line-name = "MCAN_MUX_SEL";
+ };
+
};
};
+&main_gpio0 {
+ p127 {
+ gpio-hog;
+ gpios = <127 GPIO_ACTIVE_HIGH>;
+ output-low;
+ line-name = "MCAN2_STB";
+ };
+};
+
&main_i2c1 {
pinctrl-names = "default";
pinctrl-0 = <&main_i2c1_pins_default>;
diff --git a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
index 70745bd..44b3dfd 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
@@ -1266,6 +1266,7 @@
power-domains = <&k3_pds 105 TI_SCI_PD_EXCLUSIVE>;
clocks = <&k3_clks 105 0>;
clock-names = "gpio";
+
};
main_gpio1: gpio@601000 {
@@ -2504,4 +2505,32 @@
assigned-clocks = <&k3_clks 253 1>;
assigned-clock-parents = <&k3_clks 253 5>;
};
+
+ m_can0: mcan@2701000 {
+ compatible = "bosch,m_can";
+ reg = <0x0 0x2701000 0x0 0x200>,
+ <0x0 0x2708000 0x0 0x8000>;
+ reg-names = "m_can", "message_ram";
+ power-domains = <&k3_pds 156 TI_SCI_PD_EXCLUSIVE>;
+ clocks = <&k3_clks 156 1>, <&k3_clks 156 0>;
+ clock-names = "cclk", "hclk";
+ interrupts = <GIC_SPI 124 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "int0", "int1";
+ bosch,mram-cfg = <0x0 0 0 32 0 0 1 1>;
+ };
+
+ m_can2: mcan@2721000 {
+ compatible = "bosch,m_can";
+ reg = <0x0 0x2721000 0x0 0x200>,
+ <0x0 0x2728000 0x0 0x8000>;
+ reg-names = "m_can", "message_ram";
+ power-domains = <&k3_pds 160 TI_SCI_PD_EXCLUSIVE>;
+ clocks = <&k3_clks 160 1>, <&k3_clks 160 0>;
+ clock-names = "cclk", "hclk";
+ interrupts = <GIC_SPI 130 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "int0", "int1";
+ bosch,mram-cfg = <0x0 0 0 32 0 0 1 1>;
+ };
};
--
2.7.4
It looks like patching is not OK. There are many rejected patching.
Shouldn't I patch MCAN in this version?
Best regards
Yongsig.
