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// SPDX-License-Identifier: GPL-2.0+
/*
* (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.
*/
#include <axp_pmic.h>
#include <dm.h>
#include <asm/arch/p2wi.h>
#include <asm/arch/rsb.h>
#include <i2c.h>
#include <power/pmic.h>
#include <asm/arch/pmic_bus.h>
#define AXP221_CHIP_ADDR 0x68
#if CONFIG_IS_ENABLED(PMIC_AXP)
static struct udevice *pmic;
#endif
int pmic_bus_init(void)
{
/* This cannot be 0 because it is used in SPL before BSS is ready */
static int needs_init = 1;
int ret = 0;
if (!needs_init)
return 0;
#if CONFIG_IS_ENABLED(PMIC_AXP)
ret = uclass_get_device_by_driver(UCLASS_PMIC, DM_DRIVER_GET(axp_pmic),
&pmic);
#else
if (IS_ENABLED(CONFIG_SYS_I2C_SUN6I_P2WI)) {
p2wi_init();
ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR,
AXP_PMIC_MODE_REG,
AXP_PMIC_MODE_P2WI);
} else if (IS_ENABLED(CONFIG_SYS_I2C_SUN8I_RSB)) {
ret = rsb_init();
if (ret)
return ret;
ret = rsb_set_device_address(AXP_PMIC_PRI_DEVICE_ADDR,
AXP_PMIC_PRI_RUNTIME_ADDR);
}
#endif
needs_init = ret;
return ret;
}
int pmic_bus_read(u8 reg, u8 *data)
{
#if CONFIG_IS_ENABLED(PMIC_AXP)
return pmic_read(pmic, reg, data, 1);
#else
if (IS_ENABLED(CONFIG_SYS_I2C_SUN6I_P2WI))
return p2wi_read(reg, data);
if (IS_ENABLED(CONFIG_SYS_I2C_SUN8I_RSB))
return rsb_read(AXP_PMIC_PRI_RUNTIME_ADDR, reg, data);
return i2c_read(CONFIG_AXP_I2C_ADDRESS, reg, 1, data, 1);
#endif
}
int pmic_bus_write(u8 reg, u8 data)
{
#if CONFIG_IS_ENABLED(PMIC_AXP)
return pmic_write(pmic, reg, &data, 1);
#else
if (IS_ENABLED(CONFIG_SYS_I2C_SUN6I_P2WI))
return p2wi_write(reg, data);
if (IS_ENABLED(CONFIG_SYS_I2C_SUN8I_RSB))
return rsb_write(AXP_PMIC_PRI_RUNTIME_ADDR, reg, data);
return i2c_write(CONFIG_AXP_I2C_ADDRESS, reg, 1, &data, 1);
#endif
}
int pmic_bus_setbits(u8 reg, u8 bits)
{
int ret;
u8 val;
ret = pmic_bus_read(reg, &val);
if (ret)
return ret;
if ((val & bits) == bits)
return 0;
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;
if (!(val & bits))
return 0;
val &= ~bits;
return pmic_bus_write(reg, val);
}
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