regulator.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <ec/google/chromeec/ec.h>
#include <soc/mt6359p.h>
#include <soc/mt6360.h>
#include <soc/regulator.h>
 
static int get_mt6360_regulator_id(enum mtk_regulator regulator)
{
        switch (regulator) {
        case MTK_REGULATOR_VDD2:
                return MT6360_BUCK1;
        case MTK_REGULATOR_VDDQ:
                return MT6360_LDO7;
        case MTK_REGULATOR_VMDDR:
                return MT6360_LDO6;
        case MTK_REGULATOR_VCC:
                return MT6360_LDO5;
        case MTK_REGULATOR_VCCQ:
                return MT6360_LDO3;
        default:
                break;
        }
 
        return -1;
}
 
static int get_mt6359p_regulator_id(enum mtk_regulator regulator)
{
        switch (regulator) {
        case MTK_REGULATOR_VCORE:
                return MT6359P_GPU11;
        default:
                break;
        }
 
        return -1;
}
 
void mainboard_set_regulator_vol(enum mtk_regulator regulator,
                                 uint32_t voltage_uv)
{
        /*
         * Handle the regulator that does not have a regulator ID
         * in its underlying implementation.
         */
        if (regulator == MTK_REGULATOR_VDD1) {
                mt6359p_set_vm18_voltage(voltage_uv);
                return;
        }
 
        int id;
 
        id = get_mt6360_regulator_id(regulator);
        if (id >= 0) {
                uint32_t voltage_mv = voltage_uv / 1000;
                google_chromeec_regulator_set_voltage(id, voltage_mv, voltage_mv);
                return;
        }
 
        id = get_mt6359p_regulator_id(regulator);
        if (id >= 0) {
                mt6359p_buck_set_voltage(id, voltage_uv);
                return;
        }
 
        printk(BIOS_WARNING, "Invalid regulator ID: %d\n", regulator);
}
 
uint32_t mainboard_get_regulator_vol(enum mtk_regulator regulator)
{
        /*
         * Handle the regulator that does not have a regulator ID
         * in its underlying implementation.
         */
        if (regulator == MTK_REGULATOR_VDD1)
                return mt6359p_get_vm18_voltage();
 
        int id;
 
        id = get_mt6360_regulator_id(regulator);
        if (id >= 0) {
                uint32_t voltage_mv = 0;
                google_chromeec_regulator_get_voltage(id, &voltage_mv);
                return voltage_mv * 1000;
        }
 
        id = get_mt6359p_regulator_id(regulator);
        if (id >= 0)
                return mt6359p_buck_get_voltage(id);
 
        printk(BIOS_WARNING, "Invalid regulator ID: %d\n", regulator);
 
        return 0;
}
 
int mainboard_enable_regulator(enum mtk_regulator regulator, uint8_t enable)
{
        /* Return 0 if the regulator is already enabled or disabled. */
        if (mainboard_regulator_is_enabled(regulator) == enable)
                return 0;
 
        int id;
 
        id = get_mt6360_regulator_id(regulator);
        if (id < 0) {
                printk(BIOS_WARNING, "Invalid regulator ID: %d\n", regulator);
                return -1;
        }
 
        return google_chromeec_regulator_enable(id, enable);
}
 
uint8_t mainboard_regulator_is_enabled(enum mtk_regulator regulator)
{
        int id;
 
        id = get_mt6360_regulator_id(regulator);
        if (id < 0) {
                printk(BIOS_WARNING, "Invalid regulator ID: %d\n; assuming disabled",
                       regulator);
                return 0;
        }
 
        uint8_t enabled;
        if (google_chromeec_regulator_is_enabled(id, &enabled) < 0) {
                printk(BIOS_WARNING,
                       "Failed to query regulator ID: %d\n; assuming disabled",
                       regulator);
                return 0;
        }
 
        return enabled;
}