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/*
* (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com>
*
* Sunxi PMIC bus access helpers
*
* The axp152 & axp209 use an i2c bus, the axp221 uses the p2wi bus and the
* axp223 uses the rsb bus, these functions abstract this.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/p2wi.h>
#include <asm/arch/rsb.h>
#include <i2c.h>
#include <asm/arch/pmic_bus.h>
#define AXP152_I2C_ADDR 0x30
#define AXP209_I2C_ADDR 0x34
#define AXP221_CHIP_ADDR 0x68
#define AXP221_CTRL_ADDR 0x3e
#define AXP221_INIT_DATA 0x3e
/* AXP818 device and runtime addresses are same as AXP223 */
#define AXP223_DEVICE_ADDR 0x3a3
#define AXP223_RUNTIME_ADDR 0x2d
int pmic_bus_init(void)
{
/* This cannot be 0 because it is used in SPL before BSS is ready */
static int needs_init = 1;
__maybe_unused int ret;
if (!needs_init)
return 0;
#if defined CONFIG_AXP221_POWER || defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER
# ifdef CONFIG_MACH_SUN6I
p2wi_init();
ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR,
AXP221_INIT_DATA);
# elif defined CONFIG_MACH_SUN8I_R40
/* Nothing. R40 uses the AXP221s in I2C mode */
ret = 0;
# else
ret = rsb_init();
if (ret)
return ret;
ret = rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR);
# endif
if (ret)
return ret;
#endif
needs_init = 0;
return 0;
}
int pmic_bus_read(u8 reg, u8 *data)
{
#ifdef CONFIG_AXP152_POWER
return i2c_read(AXP152_I2C_ADDR, reg, 1, data, 1);
#elif defined CONFIG_AXP209_POWER
return i2c_read(AXP209_I2C_ADDR, reg, 1, data, 1);
#elif defined CONFIG_AXP221_POWER || defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER
# ifdef CONFIG_MACH_SUN6I
return p2wi_read(reg, data);
# elif defined CONFIG_MACH_SUN8I_R40
return i2c_read(AXP209_I2C_ADDR, reg, 1, data, 1);
# else
return rsb_read(AXP223_RUNTIME_ADDR, reg, data);
# endif
#endif
}
int pmic_bus_write(u8 reg, u8 data)
{
#ifdef CONFIG_AXP152_POWER
return i2c_write(AXP152_I2C_ADDR, reg, 1, &data, 1);
#elif defined CONFIG_AXP209_POWER
return i2c_write(AXP209_I2C_ADDR, reg, 1, &data, 1);
#elif defined CONFIG_AXP221_POWER || defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER
# ifdef CONFIG_MACH_SUN6I
return p2wi_write(reg, data);
# elif defined CONFIG_MACH_SUN8I_R40
return i2c_write(AXP209_I2C_ADDR, reg, 1, &data, 1);
# else
return rsb_write(AXP223_RUNTIME_ADDR, reg, data);
# endif
#endif
}
int pmic_bus_setbits(u8 reg, u8 bits)
{
int ret;
u8 val;
ret = pmic_bus_read(reg, &val);
if (ret)
return ret;
val |= bits;
return pmic_bus_write(reg, val);
}
int pmic_bus_clrbits(u8 reg, u8 bits)
{
int ret;
u8 val;
ret = pmic_bus_read(reg, &val);
if (ret)
return ret;
val &= ~bits;
return pmic_bus_write(reg, val);
}
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