Part Number: AM4378
Other Parts Discussed in Thread: AM4372, TPS65218
Hello,
I'm currently trying to port linux kernel on custom board based AM437x-gp-evm.
(Using ti-processor-sdk-linux-am437x-evm-11.02.05.02-Linux-x86-Install.bin)
The kernel was built using the command below.
////////////////
make ARCH=arm CROSS_COMPILE="$CROSS_COMPILE_32" distclean
make ARCH=arm CROSS_COMPILE="$CROSS_COMPILE_32" multi_v7_defconfig ti_multi_v7_prune.config no_smp.config
make ARCH=arm CROSS_COMPILE="$CROSS_COMPILE_32" -j$(nproc) zImage ti/omap/am437x-custom.dtb
////////////////
However, when I add uart5 to the dts file and boot, it stops after the log shows "Kernel starting"
Without uart5, it has no problem.
Below is the dts file(am437x-custom.dts)
// DTS file
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/
*/
/* AM437x GP EVM */
/dts-v1/;
#include "am4372.dtsi"
#include <dt-bindings/pinctrl/am43xx.h>
#include <dt-bindings/pwm/pwm.h>
#include <dt-bindings/gpio/gpio.h>
/ {
model = "EDGER_LCD_MainPCB (Minimal)";
compatible = "custom,edger-lcd", "ti,am4372", "ti,am43";
chosen {
stdout-path = &uart0;
};
/* Fixed 32k RTC clock from BAT */
clk_32k_rtc: clk_32k_rtc {
#clock-cells = <0>;
compatible = "fixed-clock";
clock-frequency = <32768>;
};
};
&am43xx_pinmux {
pinctrl-names = "default";
i2c0_pins: i2c0_pins {
pinctrl-single,pins = <
AM4372_IOPAD(0x988, PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE0) /* i2c0_sda */
AM4372_IOPAD(0x98c, PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE0) /* i2c0_scl */
>;
};
uart0_pins: uart0_pins {
pinctrl-single,pins = <
AM4372_IOPAD(0x970, PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE0) /* uart0_rxd */
AM4372_IOPAD(0x974, PIN_OUTPUT_PULLDOWN | SLEWCTRL_FAST | MUX_MODE0) /* uart0_txd */
>;
};
/* Tracer 1 */
uart5_pins: uart5_pins {
pinctrl-single,pins = <
AM4372_IOPAD(0x908, PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE3) /* uart5_rxd.uart5_rxd */
AM4372_IOPAD(0x944, PIN_OUTPUT_PULLDOWN | SLEWCTRL_FAST | MUX_MODE3) /* uart5_txd.uart5_txd */
>;
};
};
&i2c0 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins>;
clock-frequency = <100000>;
tps65218: tps@24 {
compatible = "ti,tps65218";
reg = <0x24>;
interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>; /* NMIn */
interrupt-controller;
#interrupt-cells = <2>;
dcdc1: regulator-dcdc1 {
regulator-name = "vdd_core";
regulator-min-microvolt = <1100000>;
regulator-max-microvolt = <1100000>;
regulator-boot-on;
regulator-always-on;
};
dcdc2: regulator-dcdc2 {
regulator-name = "vdd_mpu";
regulator-min-microvolt = <1325000>;
regulator-max-microvolt = <1325000>;
regulator-boot-on;
regulator-always-on;
};
dcdc3: regulator-dcdc3 {
regulator-name = "vdd_ddr";
regulator-min-microvolt = <1500000>;
regulator-max-microvolt = <1500000>;
regulator-boot-on;
regulator-always-on;
};
dcdc5: regulator-dcdc5 {
regulator-name = "v1_0bat";
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
regulator-boot-on;
regulator-always-on;
};
dcdc6: regulator-dcdc6 {
regulator-name = "v1_8bat";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-boot-on;
regulator-always-on;
};
ldo1: regulator-ldo1 {
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
regulator-always-on;
};
};
};
&uart0 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&uart0_pins>;
};
&uart5 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&uart5_pins>;
};
&cpu {
cpu0-supply = <&dcdc2>;
};
&rtc {
clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
clock-names = "ext-clk", "int-clk";
status = "okay";
};
//&mac_sw {
// status = "disabled"; /* Disable Ethernet to free mii/rmii pins for UART5 */
//};
What could be the problem?
