blob: 443015bacfae16a05dbfd7982d8069580c7ee98a [file] [log] [blame]
/*
* Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2018, Icenowy Zheng <icenowy@aosc.io>
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <errno.h>
#include <string.h>
#include <arch_helpers.h>
#include <common/debug.h>
#include <drivers/allwinner/axp.h>
#include <drivers/delay_timer.h>
#include <drivers/mentor/mi2cv.h>
#include <lib/mmio.h>
#include <sunxi_def.h>
#include <sunxi_mmap.h>
#include <sunxi_private.h>
#define AXP805_ADDR 0x36
static enum pmic_type {
UNKNOWN,
AXP805,
} pmic;
int axp_read(uint8_t reg)
{
uint8_t val;
int ret;
ret = i2c_write(AXP805_ADDR, 0, 0, &reg, 1);
if (ret == 0)
ret = i2c_read(AXP805_ADDR, 0, 0, &val, 1);
if (ret) {
ERROR("PMIC: Cannot read AXP805 register %02x\n", reg);
return ret;
}
return val;
}
int axp_write(uint8_t reg, uint8_t val)
{
int ret;
ret = i2c_write(AXP805_ADDR, reg, 1, &val, 1);
if (ret)
ERROR("PMIC: Cannot write AXP805 register %02x\n", reg);
return ret;
}
static int axp805_probe(void)
{
int ret;
/* Switch the AXP805 to master/single-PMIC mode. */
ret = axp_write(0xff, 0x0);
if (ret)
return ret;
ret = axp_check_id();
if (ret)
return ret;
return 0;
}
int sunxi_pmic_setup(uint16_t socid, const void *fdt)
{
int ret;
INFO("PMIC: Probing AXP805 on I2C\n");
ret = sunxi_init_platform_r_twi(SUNXI_SOC_H6, false);
if (ret)
return ret;
/* initialise mi2cv driver */
i2c_init((void *)SUNXI_R_I2C_BASE);
ret = axp805_probe();
if (ret)
return ret;
pmic = AXP805;
axp_setup_regulators(fdt);
return 0;
}
void sunxi_power_down(void)
{
switch (pmic) {
case AXP805:
/* Re-initialise after rich OS might have used it. */
sunxi_init_platform_r_twi(SUNXI_SOC_H6, false);
/* initialise mi2cv driver */
i2c_init((void *)SUNXI_R_I2C_BASE);
axp_power_off();
break;
default:
break;
}
}