TDA4VH-Q1: read/write pmic register in u-boot

Hi,

xiuqi huang said:

I want to disable watch dog in u-boot, the tyep of pmic chip is tps6594-q1. For now,  the board reboot every 13 mins.

I read the reg0x406 and 0x409 in u-boot,

Usually the slave ID has 0x0 -- 0xFF registers.

So 0x406 maps to slave ID 0x4C and register offset 0x6

Can you use

i2c md 0x4C 0x6

In the U-Boot & check if they change in kernel?

- Keerthy

Hi, Keerthy

I've tried in i2c md 0x4C 0x6  U-boot, but it didn't work

The configuration in U-boot dts:

&wkup_pmx0 {
+ wkup_i2c0_pins_default: wkup-i2c0-pins-default {
+ pinctrl-single,pins = <
+ J784S4_WKUP_IOPAD(0x098, PIN_INPUT, 0) /* (N33) WKUP_I2C0_SCL */
+ J784S4_WKUP_IOPAD(0x09C, PIN_INPUT, 0) /* (N35) WKUP_I2C0_SDA */
+ >;
+ };
+
mcu_fss0_ospi0_pins_default: mcu-fss0-ospi0-pins-default {
pinctrl-single,pins = <
J784S4_WKUP_IOPAD(0x000, PIN_OUTPUT, 0) /* (E32) MCU_OSPI0_CLK */
@@ -868,7 +875,11 @@
};

&wkup_i2c0 {
- status = "disabled";
+ status = "okay";
+ u-boot,dm-spl;
+ pinctrl-names = "default";
+ pinctrl-0 = <&wkup_i2c0_pins_default>;
+ clock-frequency = <400000>;
};