1 /* 2 * (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com> 3 * 4 * Sunxi PMIC bus access helpers 5 * 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. 8 * 9 * SPDX-License-Identifier: GPL-2.0+ 10 */ 11 12 #include <common.h> 13 #include <asm/arch/p2wi.h> 14 #include <asm/arch/rsb.h> 15 #include <i2c.h> 16 #include <asm/arch/pmic_bus.h> 17 18 #define AXP152_I2C_ADDR 0x30 19 20 #define AXP209_I2C_ADDR 0x34 21 22 #define AXP221_CHIP_ADDR 0x68 23 #define AXP221_CTRL_ADDR 0x3e 24 #define AXP221_INIT_DATA 0x3e 25 26 /* AXP818 device and runtime addresses are same as AXP223 */ 27 #define AXP223_DEVICE_ADDR 0x3a3 28 #define AXP223_RUNTIME_ADDR 0x2d 29 30 int pmic_bus_init(void) 31 { 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; 35 36 if (!needs_init) 37 return 0; 38 39 #if defined CONFIG_AXP221_POWER || defined CONFIG_AXP818_POWER 40 # ifdef CONFIG_MACH_SUN6I 41 p2wi_init(); 42 ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR, 43 AXP221_INIT_DATA); 44 # else 45 ret = rsb_init(); 46 if (ret) 47 return ret; 48 49 ret = rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR); 50 # endif 51 if (ret) 52 return ret; 53 #endif 54 55 needs_init = 0; 56 return 0; 57 } 58 59 int pmic_bus_read(u8 reg, u8 *data) 60 { 61 #ifdef CONFIG_AXP152_POWER 62 return i2c_read(AXP152_I2C_ADDR, reg, 1, data, 1); 63 #elif defined CONFIG_AXP209_POWER 64 return i2c_read(AXP209_I2C_ADDR, reg, 1, data, 1); 65 #elif defined CONFIG_AXP221_POWER || defined CONFIG_AXP818_POWER 66 # ifdef CONFIG_MACH_SUN6I 67 return p2wi_read(reg, data); 68 # else 69 return rsb_read(AXP223_RUNTIME_ADDR, reg, data); 70 # endif 71 #endif 72 } 73 74 int pmic_bus_write(u8 reg, u8 data) 75 { 76 #ifdef CONFIG_AXP152_POWER 77 return i2c_write(AXP152_I2C_ADDR, reg, 1, &data, 1); 78 #elif defined CONFIG_AXP209_POWER 79 return i2c_write(AXP209_I2C_ADDR, reg, 1, &data, 1); 80 #elif defined CONFIG_AXP221_POWER || defined CONFIG_AXP818_POWER 81 # ifdef CONFIG_MACH_SUN6I 82 return p2wi_write(reg, data); 83 # else 84 return rsb_write(AXP223_RUNTIME_ADDR, reg, data); 85 # endif 86 #endif 87 } 88 89 int pmic_bus_setbits(u8 reg, u8 bits) 90 { 91 int ret; 92 u8 val; 93 94 ret = pmic_bus_read(reg, &val); 95 if (ret) 96 return ret; 97 98 val |= bits; 99 return pmic_bus_write(reg, val); 100 } 101 102 int pmic_bus_clrbits(u8 reg, u8 bits) 103 { 104 int ret; 105 u8 val; 106 107 ret = pmic_bus_read(reg, &val); 108 if (ret) 109 return ret; 110 111 val &= ~bits; 112 return pmic_bus_write(reg, val); 113 } 114