diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/sunxi/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/sunxi/pmic_bus.c | 93 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-sunxi/pmic_bus.h | 18 |
3 files changed, 113 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile index 3052b278a4..9a1eeec3bb 100644 --- a/arch/arm/cpu/armv7/sunxi/Makefile +++ b/arch/arm/cpu/armv7/sunxi/Makefile @@ -27,6 +27,8 @@ obj-$(CONFIG_MACH_SUN7I) += clock_sun4i.o obj-$(CONFIG_MACH_SUN8I) += clock_sun6i.o obj-$(CONFIG_MACH_SUN9I) += clock_sun9i.o +obj-$(CONFIG_AXP221_POWER) += pmic_bus.o + ifndef CONFIG_SPL_BUILD ifdef CONFIG_ARMV7_PSCI obj-y += psci.o 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 0000000000..389144bf88 --- /dev/null +++ b/arch/arm/cpu/armv7/sunxi/pmic_bus.c @@ -0,0 +1,93 @@ +/* + * (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 <asm/arch/pmic_bus.h> + +#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; + int ret; + + if (!needs_init) + return 0; + +#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; + + needs_init = 0; + return 0; +} + +int pmic_bus_read(u8 reg, u8 *data) +{ +#ifdef CONFIG_MACH_SUN6I + return p2wi_read(reg, data); +#else + return rsb_read(AXP223_RUNTIME_ADDR, reg, data); +#endif +} + +int pmic_bus_write(u8 reg, u8 data) +{ +#ifdef CONFIG_MACH_SUN6I + return p2wi_write(reg, data); +#else + return rsb_write(AXP223_RUNTIME_ADDR, reg, data); +#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); +} diff --git a/arch/arm/include/asm/arch-sunxi/pmic_bus.h b/arch/arm/include/asm/arch-sunxi/pmic_bus.h new file mode 100644 index 0000000000..9c4372a881 --- /dev/null +++ b/arch/arm/include/asm/arch-sunxi/pmic_bus.h @@ -0,0 +1,18 @@ +/* + * (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com> + * + * Sunxi PMIC bus access helpers header + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _SUNXI_PMIC_BUS_H +#define _SUNXI_PMIS_BUS_H + +int pmic_bus_init(void); +int pmic_bus_read(u8 reg, u8 *data); +int pmic_bus_write(u8 reg, u8 data); +int pmic_bus_setbits(u8 reg, u8 bits); +int pmic_bus_clrbits(u8 reg, u8 bits); + +#endif |
