da9212.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <device/i2c_simple.h>
#include <soc/da9212.h>
 
enum {
        DA9212_SLAVE_ADDR = 0x68,
};
 
static void da9212_hw_init(uint8_t i2c_num, unsigned char variant_id)
{
        int ret = 0;
        int buck_mode = DA9212_BUCK_MODE_AUTO;
 
        if (variant_id == DA9212_VARIANT_ID_AB)
                buck_mode = DA9212_BUCK_MODE_PWM;
 
        /* page select to 0 */
        ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
                               DA9212_REG_PAGE_CON, DA9212_REG_PAGE0,
                               DA9212_REG_PAGE_MASK, DA9212_REG_PAGE_SHIFT);
 
        ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
                               DA9212_REG_BUCKA_CONT, DA9212_BUCK_GPI_GPIO1,
                               DA9212_BUCK_GPI_MASK, DA9212_BUCK_GPI_SHIFT);
 
        ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
                               DA9212_REG_BUCKB_CONT, DA9212_BUCK_GPI_OFF,
                               DA9212_BUCK_GPI_OFF, DA9212_BUCK_GPI_SHIFT);
 
        ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
                               DA9212_REG_BUCKA_CONT, DA9212_VBUCK_SEL_A,
                               DA9212_VBUCK_SEL_MASK, DA9212_VBUCK_SEL_SHIFT);
 
        ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
                               DA9212_REG_BUCKB_CONT, DA9212_VBUCK_SEL_A,
                               DA9212_VBUCK_SEL_MASK, DA9212_VBUCK_SEL_SHIFT);
 
        ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
                               DA9212_REG_BUCKA_CONF, buck_mode,
                               DA9212_BUCK_MODE_MASK, DA9212_BUCK_MODE_SHIFT);
 
        ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
                               DA9212_REG_BUCKB_CONF, buck_mode,
                               DA9212_BUCK_MODE_MASK, DA9212_BUCK_MODE_SHIFT);
 
        if (ret)
                printk(BIOS_ERR, "%s failed\n", __func__);
 
}
 
void da9212_probe(uint8_t i2c_num)
{
        int ret = 0;
        unsigned char device_id = 0;
        unsigned char variant_id = 0;
 
        /* select to page 4, clear REVERT at first time */
        ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
                               DA9212_REG_PAGE_CON, DA9212_REG_PAGE4,
                               0xF, DA9212_REG_PAGE_SHIFT);
 
        ret |= i2c_read_field(i2c_num, DA9212_SLAVE_ADDR,
                              DA9212_REG_DEVICE_ID, &device_id,
                              0xFF, 0);
 
        ret |= i2c_read_field(i2c_num, DA9212_SLAVE_ADDR,
                              DA9212_REG_VARIANT_ID, &variant_id,
                              0xFF, 0);
 
        printk(BIOS_INFO, "%s: device ID = %#x, variant ID = %#x\n", __func__,
               device_id, variant_id);
 
        /* Check device ID is DA9212 */
        if (device_id != DA9212_ID || ret) {
                printk(BIOS_ERR, "unknown DA9212 device_id\n");
                return;
        }
 
        da9212_hw_init(i2c_num, variant_id);
}