diff options
Diffstat (limited to 'arch/arm/cpu/armv7/sunxi/pmic_bus.c')
-rw-r--r-- | arch/arm/cpu/armv7/sunxi/pmic_bus.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/pmic_bus.c b/arch/arm/cpu/armv7/sunxi/pmic_bus.c new file mode 100644 index 0000000..9e05127 --- /dev/null +++ b/arch/arm/cpu/armv7/sunxi/pmic_bus.c @@ -0,0 +1,112 @@ +/* + * (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 + +#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; + +#ifdef CONFIG_AXP221_POWER +# ifdef CONFIG_MACH_SUN6I + p2wi_init(); + ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR, + AXP221_INIT_DATA); +# 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 +# ifdef CONFIG_MACH_SUN6I + return p2wi_read(reg, data); +# 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 +# ifdef CONFIG_MACH_SUN6I + return p2wi_write(reg, data); +# 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); +} |