2 * (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com>
4 * Sunxi PMIC bus access helpers
6 * The axp152 & axp209 use an i2c bus, the axp221 uses the p2wi bus and the
7 * axp223 uses the rsb bus, these functions abstract this.
9 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/arch/p2wi.h>
14 #include <asm/arch/rsb.h>
16 #include <asm/arch/pmic_bus.h>
18 #define AXP152_I2C_ADDR 0x30
20 #define AXP209_I2C_ADDR 0x34
22 #define AXP221_CHIP_ADDR 0x68
23 #define AXP221_CTRL_ADDR 0x3e
24 #define AXP221_INIT_DATA 0x3e
26 /* AXP818 device and runtime addresses are same as AXP223 */
27 #define AXP223_DEVICE_ADDR 0x3a3
28 #define AXP223_RUNTIME_ADDR 0x2d
30 int pmic_bus_init(void)
32 /* This cannot be 0 because it is used in SPL before BSS is ready */
33 static int needs_init = 1;
34 __maybe_unused int ret;
39 #if defined CONFIG_AXP221_POWER || defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER
40 # ifdef CONFIG_MACH_SUN6I
42 ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR,
44 # elif defined CONFIG_MACH_SUN8I_R40
45 /* Nothing. R40 uses the AXP221s in I2C mode */
52 ret = rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR);
62 int pmic_bus_read(u8 reg, u8 *data)
64 #ifdef CONFIG_AXP152_POWER
65 return i2c_read(AXP152_I2C_ADDR, reg, 1, data, 1);
66 #elif defined CONFIG_AXP209_POWER
67 return i2c_read(AXP209_I2C_ADDR, reg, 1, data, 1);
68 #elif defined CONFIG_AXP221_POWER || defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER
69 # ifdef CONFIG_MACH_SUN6I
70 return p2wi_read(reg, data);
71 # elif defined CONFIG_MACH_SUN8I_R40
72 return i2c_read(AXP209_I2C_ADDR, reg, 1, data, 1);
74 return rsb_read(AXP223_RUNTIME_ADDR, reg, data);
79 int pmic_bus_write(u8 reg, u8 data)
81 #ifdef CONFIG_AXP152_POWER
82 return i2c_write(AXP152_I2C_ADDR, reg, 1, &data, 1);
83 #elif defined CONFIG_AXP209_POWER
84 return i2c_write(AXP209_I2C_ADDR, reg, 1, &data, 1);
85 #elif defined CONFIG_AXP221_POWER || defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER
86 # ifdef CONFIG_MACH_SUN6I
87 return p2wi_write(reg, data);
88 # elif defined CONFIG_MACH_SUN8I_R40
89 return i2c_write(AXP209_I2C_ADDR, reg, 1, &data, 1);
91 return rsb_write(AXP223_RUNTIME_ADDR, reg, data);
96 int pmic_bus_setbits(u8 reg, u8 bits)
101 ret = pmic_bus_read(reg, &val);
106 return pmic_bus_write(reg, val);
109 int pmic_bus_clrbits(u8 reg, u8 bits)
114 ret = pmic_bus_read(reg, &val);
119 return pmic_bus_write(reg, val);