mt6311.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <device/i2c_simple.h>
#include <soc/mt6311.h>
 
enum {
        MT6311_SLAVE_ADDR = 0x6B,
};
 
static u32 get_mt6311_chip_id(uint8_t i2c_num)
{
        unsigned char id[2] = {0};
 
        i2c_read_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_CID,
                       &id[0], 0xFF, 0);
        i2c_read_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_SWCID,
                       &id[1], 0xFF, 0);
 
        return (u32)(id[0] << 8 | id[1]);
}
 
static void mt6311_hw_init(uint8_t i2c_num)
{
        int ret = 0;
        unsigned char var[3] = {0};
 
        /*
         * Phase Shedding Trim Software Setting
         * The phase 2 of MT6311 will enter PWM mode if the threshold is
         * reached.
         * The threshold is set according to EFUSE value.
         */
        ret |= i2c_read_field(i2c_num, MT6311_SLAVE_ADDR,
                              MT6311_EFUSE_DOUT_56_63, &var[0],
                              0x3, 1);
        ret |= i2c_read_field(i2c_num, MT6311_SLAVE_ADDR,
                              MT6311_EFUSE_DOUT_56_63, &var[1],
                              0x1, 7);
        ret |= i2c_read_field(i2c_num, MT6311_SLAVE_ADDR,
                              MT6311_EFUSE_DOUT_64_71, &var[2],
                              0x1, 0);
 
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_VDVFS1_ANA_CON10,
                               var[0] | var[1] << 2 | var[2] << 3, 0xf, 0);
 
        /* I2C_CONFIG; pushpull setting, Opendrain is '0' */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_TOP_INT_CON,
                               0x1, 0x1, 2);
        /* RG_WDTRSTB_EN; CC, initial WDRSTB setting. */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_TOP_RST_CON,
                               0x1, 0x1, 5);
        /* initial INT function */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_GPIO_MODE,
                               0x1, 0x7, 3);
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_STRUP_CON5,
                               0, 1 << 2 | 1 << 1 | 1 << 0, 0);
 
        /* Vo max is 1.15V */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_STRUP_ANA_CON1, 0x3, 0x3, 5);
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_BUCK_ALL_CON23, 0x1, 0x1, 0);
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_STRUP_ANA_CON2, 0x3, 0x3, 0);
        /* Suspend HW control from SPM */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_TOP_CON, 0x1, 0x1, 0);
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_VDVFS11_CON7, 0x1, 0x1, 0);
        /* default VDVFS power on */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_VDVFS11_CON9, 0x1, 0x1, 0);
        /* for DVFS slew rate rising=0.67us */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_VDVFS11_CON10, 0x1, 0x7f, 0);
        /* for DVFS slew rate, falling 2.0us */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_VDVFS11_CON11, 0x5, 0x7f, 0);
        /* default VDVFS11_VOSEL 1.0V, SW control */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_VDVFS11_CON12, 0x40, 0x7f, 0);
        /* default VDVFS11_VOSEL_ON 1.0V, HW control */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_VDVFS11_CON13, 0x40, 0x7f, 0);
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_VDVFS11_CON14, 0x40, 0x7f, 0);
        /* for DVFS sof change, falling 50us */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_VDVFS11_CON19, 0x3, 0x3, 0);
        /* for DVFS sof change, falling only */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_VDVFS11_CON19, 0x1, 0x3, 4);
        /* OFF LDO */
        ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
                               MT6311_LDO_CON3, 0, 0x1, 0);
 
        if (ret)
                printk(BIOS_ERR, "%s failed\n", __func__);
}
 
void mt6311_probe(uint8_t i2c_num)
{
        u32 val = 0;
 
        /* Check device ID is MT6311 */
        val = get_mt6311_chip_id(i2c_num);
        printk(BIOS_INFO, "%s: device ID = %#x\n", __func__, val);
 
        if (val < MT6311_E1_CID_CODE) {
                printk(BIOS_ERR, "unknown MT6311 device_id\n");
                return;
        }
 
        mt6311_hw_init(i2c_num);
}