Rockchip RK801 PMIC: Versorgung, DTS und Register-Debugging

// BUCK1
static const struct linear_range rk801_buck1_voltage_ranges[] = {
   REGULATOR_LINEAR_RANGE(500000,   0, 80, 12500), /* 0.5V - 1.5V, step 12.5mV */
   REGULATOR_LINEAR_RANGE(1800000, 81, 82, 400000),/* 1.8V - 2.2V */
   REGULATOR_LINEAR_RANGE(3300000, 83, 83, 0), /* 3.3V */
   REGULATOR_LINEAR_RANGE(5000000, 84, 84, 0), /* 5.0V */
   REGULATOR_LINEAR_RANGE(5250000, 85, 85, 0), /* 5.25V */
};

// BUCK2
static const struct linear_range rk801_buck2_voltage_ranges[] = {
   REGULATOR_LINEAR_RANGE(800000,  0, 2, 50000),   /* 0.8V - 0.9V */
   REGULATOR_LINEAR_RANGE(1800000, 3, 4, 400000),  /* 1.8V - 2.2V */
   REGULATOR_LINEAR_RANGE(3300000, 5, 5, 0),   /* 3.3V */
   REGULATOR_LINEAR_RANGE(5000000, 6, 6, 0),   /* 5.0V */
   REGULATOR_LINEAR_RANGE(5250000, 7, 7, 0),   /* 5.25V */
};

// BUCK4
static const struct linear_range rk801_buck4_voltage_ranges[] = {
   REGULATOR_LINEAR_RANGE(500000,   0, 80, 12500), /* 0.5V - 1.5V */
   REGULATOR_LINEAR_RANGE(1800000, 81, 82, 400000),/* 1.8V - 2.2V */
   REGULATOR_LINEAR_RANGE(2500000, 83, 83, 0), /* 2.5V */
   REGULATOR_LINEAR_RANGE(2800000, 84, 84, 0), /* 2.8V */
   REGULATOR_LINEAR_RANGE(3000000, 85, 85, 0), /* 3.0V */
   REGULATOR_LINEAR_RANGE(3300000, 86, 86, 0), /* 3.3V */
};

drivers/mfd/rk808.c
drivers/regulator/rk801-regulator.c
drivers/input/misc/rk805-pwrkey.c

CONFIG_MFD_RK808
CONFIG_REGULATOR_RK801
CONFIG_INPUT_RK805_PWRKEY

commit 0439f30ead1393813d69a01587530652908c9171
Author: Joseph Chen <chenjh@rock-chips.com>
Date:   Fri Jun 13 17:19:25 2025 +0800

    mfd: rk808: Print full chip id of rk801

    Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
    Change-Id: I195858d23c862d0f961acb4c04bb1102ab9954c9

commit 1a81f4f6344f7cd4203be508150daeedc00fbedb
Author: Joseph Chen <chenjh@rock-chips.com>
Date:   Thu May 29 11:39:58 2025 +0800

    mfd: rk801: Add support for pwrctrl active pol set and reboot rst

    - Don't require pwrctrl dvs if hw compatible version >= 3.
    - Auto parse pwrctrl active pol from GPIO_ACTIVE_{HIGH,LOW} flag.
    - Reset pmic and soc when system reboot if required.

    Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
    Change-Id: I29e60c2a717cee5c9d1e3c6e46ee687352d4a1be

&i2c0 {
    status = "okay";
    ......

    rk801: rk801@27 {
        // Cannot be modified.
        compatible = "rockchip,rk801";
        status = "okay";
        reg = <0x27>;

        // PMIC_INT pin configuration. Here is GPIO0_C2, active low.
        interrupt-parent = <&gpio0>;
        interrupts = <RK_PC2 IRQ_TYPE_LEVEL_LOW>;

        // PWRCTRL pin configuration. Here is GPIO0_C1, active high.
        pwrctrl-gpios = <&gpio0 RK_PC1 GPIO_ACTIVE_HIGH>;

        // Pinctrl configuration.
        pinctrl-names = "default", "pmic-reset";
        // Initialize pmic_int pin state.
        pinctrl-0 = <&pmic_int>;
        // Set the state of pwrctrl when rebooting. After this configuration, PMIC will reset its various voltages together with the SoC.
        pinctrl-1 = <&soc_pwrctrl_reset>;

        // Cannot be modified. Declare that RK801 has the function of managing system power-down.
        rockchip,system-power-controller;

        // Cannot be modified. Declare PMIC_INT as a wake-up source.
        wakeup-source;

        // Input sources for each regulator.
        // vcc1~7 correspond to: BUCK1/2/3/4, LDO1/2, SWITCH.
        vcc1-supply = <&vcc12v_dc>;
        vcc2-supply = <&vcc12v_dc>;
        vcc3-supply = <&vcc5v0_sys>;
        vcc4-supply = <&vcc5v0_sys>;
        vcc5-supply = <&vcc3v3_sys>;
        vcc6-supply = <&vcc3v3_sys>;
        vcc7-supply = <&vcc3v3_sys>;
        regulators {
            vcc3v3_sys: DCDC_REG1 {
                regulator-name = "vcc3v3_sys";
                regulator-min-microvolt = <3300000>;
                regulator-max-microvolt = <3300000>;
                regulator-initial-mode = <0x1>;
                regulator-boot-on;
                regulator-always-on;
                regulator-state-mem {
                    regulator-mode = <0x2>;
                    regulator-on-in-suspend;
                    regulator-suspend-microvolt = <3300000>;
                };
            };

            vcc5v0_sys: DCDC_REG2 {
                regulator-name = "vcc5v0_sys";
                regulator-min-microvolt = <5000000>;
                regulator-max-microvolt = <5000000>;
                regulator-initial-mode = <0x1>;
                regulator-boot-on;
                regulator-always-on;
                regulator-state-mem {
                    regulator-mode = <0x2>;
                    regulator-on-in-suspend;
                    regulator-suspend-microvolt = <5000000>;
                };
            };

            vcc_ddr: DCDC_REG3 {
                regulator-name = "vcc_ddr";
                regulator-boot-on;
                regulator-always-on;
                regulator-state-mem {
                    regulator-mode = <0x2>;
                    regulator-on-in-suspend;
                };
            };

            vdd_cpu: DCDC_REG4 {
                regulator-name = "vdd_cpu";
                regulator-min-microvolt = <500000>;
                regulator-max-microvolt = <1500000>;
                regulator-initial-mode = <0x1>;
                regulator-boot-on;
                regulator-always-on;
                regulator-state-mem {
                    regulator-mode = <0x2>;
                    regulator-off-in-suspend;
                };
            };
            vdd0v9_sys: LDO_REG1 {
                regulator-name = "vdd0v9_sys";
                regulator-min-microvolt = <900000>;
                regulator-max-microvolt = <900000>;
                regulator-boot-on;
                regulator-always-on;
                regulator-state-mem {
                    regulator-on-in-suspend;
                    regulator-suspend-microvolt = <900000>;
                };
            };

            vcc_1v8: LDO_REG2 {
                regulator-name = "vcc_1v8";
                regulator-min-microvolt = <1800000>;
                regulator-max-microvolt = <1800000>;
                regulator-boot-on;
                regulator-always-on;
                regulator-state-mem {
                    regulator-on-in-suspend;
                    regulator-suspend-microvolt = <1800000>;
                };
            };

            vcc_3v3: SWITCH_REG {
                regulator-name = "vcc_3v3";
                regulator-boot-on;
                regulator-always-on;
                regulator-state-mem {
                    regulator-on-in-suspend;
                };
            };
        };
    };
};

&pinctrl {
    ......

    pmic {
        // pmic_int is set to normally high level, that is, active low.
        pmic_int: pmic-int {
            rockchip,pins = <0 RK_PC2 RK_FUNC_GPIO &pcfg_pull_up>;
        };

        // The level state that the pwrctrl pin should maintain during system reset, must be opposite to the SoC's default power-on state.
        // For example: if the default power-on is down, configure as output high; otherwise, configure as output low.
        soc_pwrctrl_reset: soc-pwrctrl-reset {
            rockchip,pins = <0 RK_PC1 RK_FUNC_GPIO &pcfg_output_high>;
        };
    };
};

rk801: rk801@27 {

    ......

    pwrkey {
        status = "disabled";
    };
};

struct regulator *rdev_logic;

rdev_logic = regulator_get(NULL, "vdd_logic");          // Get vdd_logic
regulator_enable(rdev_logic);                           // Enable vdd_logic
regulator_set_voltage(rdev_logic, 1100000, 1100000);    // Set voltage 1.1v
regulator_disable(rdev_logic);                          // Disable vdd_logic
regulator_put(rdev_logic);                              // Release vdd_logic

# Read register
echo r [addr]  > /sys/rk8xx/rk8xx_dbg
# Write register
echo w [addr] [value] > /sys/rk8xx/rk8xx_dbg

echo r 0x2f > /sys/rk8xx/rk8xx_dbg          # Read the value of register 0x2f
echo w 0x2f 0x9c > /sys/rk8xx/rk8xx_dbg     # Set the value of register 0x2f to 0x9c