TPS65224-Q1: PMIC probe failed with error -22

Mohamed Emara

Part Number: TPS65224-Q1
Other Parts Discussed in Thread: AM62P

Tool/software:

Hello,

I have the soc "AM62P" on my custom board and I fail to get the pmic to fully functioning state.
I have the following node for PMIC in my dts, as you can see irq is commented because it is not wired for us:

&wkup_i2c0 {
	pinctrl-names = "default";
	pinctrl-0 = <&wkup_i2c0_pins_default>;
	clock-frequency = <40000>;
	status = "okay";
	//bootph-all;

	tps65224: pmic@48 {
		compatible = "ti,tps65224-q1";
		reg = <0x48>;
//		pinctrl-names = "default";
//		pinctrl-0 = <&pmic_irq_pins_default>;
//		interrupt-parent = <&main_gpio0>;
//		interrupts = <0 IRQ_TYPE_EDGE_FALLING>;
		ti,primary-pmic;

		gpio-controller;
		#gpio-cells = <2>;

    buck12-supply = <&vcc_5v0>;
    buck3-supply = <&vcc_5v0>;
    buck4-supply = <&vcc_5v0>;

    ldo1-supply = <&vcc_5v0>;
	  ldo2-supply = <&vcc_5v0>;
	  ldo3-supply = <&buck3>;

	  regulators {
		  buck12: buck12 {
		    regulator-name = "vcc_core_buck12";
		    regulator-min-microvolt = <715000>;
		    regulator-max-microvolt = <895000>;
		    regulator-boot-on;
		    regulator-always-on;
		  };

		  buck3: buck3 {
		    regulator-name = "vcc1v8_sys_buck3";
			  regulator-min-microvolt = <1800000>;
			  regulator-max-microvolt = <1800000>;
			  regulator-boot-on;
			  regulator-always-on;
		  };

		  buck4: buck4 {
			  regulator-name = "vcc1v1_buck4";
			  regulator-min-microvolt = <1100000>;
			  regulator-max-microvolt = <1100000>;
			  regulator-boot-on;
			  regulator-always-on;
		  };

		  ldo1: ldo1 {
			  regulator-name = "vdda1v8_ldo1";
			  regulator-min-microvolt = <1800000>;
			  regulator-max-microvolt = <1800000>;
			  regulator-boot-on;
			  regulator-always-on;
		  };

		  ldo2: ldo2 {
			  regulator-name = "dvdd3v3_ldo2";
			  regulator-min-microvolt = <3300000>;
			  regulator-max-microvolt = <3300000>;
			  regulator-boot-on;
			  regulator-always-on;
		  };

		  ldo3: ldo3 {
			  regulator-name = "vcc_0v85_ldo3";
			  regulator-min-microvolt = <850000>;
			  regulator-max-microvolt = <850000>;
			  regulator-boot-on;
			  regulator-always-on;
		  };
    };
	};
};

pinmux for wkup-i2c:

&mcu_pmx0 {
	bootph-all;

	wkup_i2c0_pins_default: wkup-i2c0-default-pins {
		pinctrl-single,pins = <
			AM62PX_MCU_IOPAD(0x04c, PIN_INPUT_PULLUP, 0)	/* (A13) WKUP_I2C0_SCL */
			AM62PX_MCU_IOPAD(0x050, PIN_INPUT_PULLUP, 0)	/* (C11) WKUP_I2C1_SDA */
		>;
		bootph-all;
	};
};

I can see the regulators in userspace under "/sys/firmware/devicetree/base/bus@f0000/bus@b00000/i2c@2b200000/pmic@48/regulators".

I have the following questions:
1. How to get the pmic to function in the right way? is it a must to have the IRQ?
2. Performing a shutdown from console does not work, Linux attempts to do shutdown but everything stay powered on and the current drawn is still the same.
3. I have configured a gpio_pin as "KEY_POWER" in linux to execute a shutdown in linux on a long-press of the push-button but it works also with a shortpress?

dmesg log:

dmesg | grep -i tps
[    1.133006] tps6594 0-0048: Failed to request IRQ 0 for tps6594-3-0x48: -22
[    1.140142] tps6594 0-0048: error -EINVAL: Failed to add regmap IRQ
[    1.146622] tps6594 0-0048: probe with driver tps6594 failed with error -22

Thanks and regards,
Mohamed

1 day ago

0 Anshu Madwesh 1 day ago

TI__Mastermind 18440 points

Hi Mohamed,

Mohamed Emara said:
1. How to get the pmic to function in the right way? is it a must to have the IRQ?

From the PMIC's device tree bindings, the interrupt properties is considered a required property: https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml?h=ti-linux-6.12.y#n99

Mohamed Emara said:
2. Performing a shutdown from console does not work, Linux attempts to do shutdown but everything stay powered on and the current drawn is still the same.

A Linux command line shutdown will suspend the OS, but it doesn't interact with the PMIC. Its possible that the other cores, peripherals, etc. are still running hence drawing current.

Mohamed Emara said:
3. I have configured a gpio_pin as "KEY_POWER" in linux to execute a shutdown in linux on a long-press of the push-button but it works also with a shortpress?

Can you clarify what you mean? Have you tested that a long press has successfully shutdown Linux? If it does work, I don't see a reason why a short press wouldn't work.

Thanks,

Anshu

0 Mohamed Emara 1 day ago in reply to Anshu Madwesh

Prodigy 70 points

Hi Anshu,
Thanks for your reply.

Anshu Madwesh said:
From the PMIC's device tree bindings, the interrupt properties is considered a required property: https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml?h=ti-linux-6.12.y#n99

This means that the interrupt pin needs to be wired on the pmic and can not be left floating? I looked into my schematic and don't see the pin "nINT/EN_DRV" connected to anything.

Anshu Madwesh said:
A Linux command line shutdown will suspend the OS, but it doesn't interact with the PMIC. Its possible that the other cores, peripherals, etc. are still running hence drawing current.

I was expecting that the SOC communicates with the PMIC through I2c and request a poweroff to the whole system. How to do a power off then in my case?
I was told by one of my colleagues that I can toggle the SOC GPIO1_31 "High->Low" in order to execute a shutdown from the pmic.
I added that pin as a poweroff_gpio to my dts and configured as output/active_low, but it did not work.

Anshu Madwesh said:
Can you clarify what you mean? Have you tested that a long press has successfully shutdown Linux? If it does work, I don't see a reason why a short press wouldn't work.

There is a misunderstanding. I mean it should perform a shutdown on longpress "2sec" but it reacts on very short press and does a shutdown.
in logind.conf.in, I configuered the longpress:
HandlePowerKeyLongPress=poweroffRegrads,
Mohamed

0 Anshu Madwesh 2 hours ago in reply to Mohamed Emara

TI__Mastermind 18440 points

Hi Mohamed,

I'll need to look into this and I'll get back to you by Friday.

Thanks,

Anshu

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TPS65224-Q1: PMIC probe failed with error -22