1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com> 4 * 5 * Sunxi PMIC bus access helpers 6 * 7 * The axp152 & axp209 use an i2c bus, the axp221 uses the p2wi bus and the 8 * axp223 uses the rsb bus, these functions abstract this. 9 */ 10 11 #include <common.h> 12 #include <asm/arch/p2wi.h> 13 #include <asm/arch/rsb.h> 14 #include <i2c.h> 15 #include <asm/arch/pmic_bus.h> 16 17 #define AXP152_I2C_ADDR 0x30 18 19 #define AXP209_I2C_ADDR 0x34 20 21 #define AXP221_CHIP_ADDR 0x68 22 #define AXP221_CTRL_ADDR 0x3e 23 #define AXP221_INIT_DATA 0x3e 24 25 /* AXP818 device and runtime addresses are same as AXP223 */ 26 #define AXP223_DEVICE_ADDR 0x3a3 27 #define AXP223_RUNTIME_ADDR 0x2d 28 29 int pmic_bus_init(void) 30 { 31 /* This cannot be 0 because it is used in SPL before BSS is ready */ 32 static int needs_init = 1; 33 __maybe_unused int ret; 34 35 if (!needs_init) 36 return 0; 37 38 #if defined CONFIG_AXP221_POWER || defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER 39 # ifdef CONFIG_MACH_SUN6I 40 p2wi_init(); 41 ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR, 42 AXP221_INIT_DATA); 43 # elif defined CONFIG_MACH_SUN8I_R40 44 /* Nothing. R40 uses the AXP221s in I2C mode */ 45 ret = 0; 46 # else 47 ret = rsb_init(); 48 if (ret) 49 return ret; 50 51 ret = rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR); 52 # endif 53 if (ret) 54 return ret; 55 #endif 56 57 needs_init = 0; 58 return 0; 59 } 60 61 int pmic_bus_read(u8 reg, u8 *data) 62 { 63 #ifdef CONFIG_AXP152_POWER 64 return i2c_read(AXP152_I2C_ADDR, reg, 1, data, 1); 65 #elif defined CONFIG_AXP209_POWER 66 return i2c_read(AXP209_I2C_ADDR, reg, 1, data, 1); 67 #elif defined CONFIG_AXP221_POWER || defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER 68 # ifdef CONFIG_MACH_SUN6I 69 return p2wi_read(reg, data); 70 # elif defined CONFIG_MACH_SUN8I_R40 71 return i2c_read(AXP209_I2C_ADDR, reg, 1, data, 1); 72 # else 73 return rsb_read(AXP223_RUNTIME_ADDR, reg, data); 74 # endif 75 #endif 76 } 77 78 int pmic_bus_write(u8 reg, u8 data) 79 { 80 #ifdef CONFIG_AXP152_POWER 81 return i2c_write(AXP152_I2C_ADDR, reg, 1, &data, 1); 82 #elif defined CONFIG_AXP209_POWER 83 return i2c_write(AXP209_I2C_ADDR, reg, 1, &data, 1); 84 #elif defined CONFIG_AXP221_POWER || defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER 85 # ifdef CONFIG_MACH_SUN6I 86 return p2wi_write(reg, data); 87 # elif defined CONFIG_MACH_SUN8I_R40 88 return i2c_write(AXP209_I2C_ADDR, reg, 1, &data, 1); 89 # else 90 return rsb_write(AXP223_RUNTIME_ADDR, reg, data); 91 # endif 92 #endif 93 } 94 95 int pmic_bus_setbits(u8 reg, u8 bits) 96 { 97 int ret; 98 u8 val; 99 100 ret = pmic_bus_read(reg, &val); 101 if (ret) 102 return ret; 103 104 if ((val & bits) == bits) 105 return 0; 106 107 val |= bits; 108 return pmic_bus_write(reg, val); 109 } 110 111 int pmic_bus_clrbits(u8 reg, u8 bits) 112 { 113 int ret; 114 u8 val; 115 116 ret = pmic_bus_read(reg, &val); 117 if (ret) 118 return ret; 119 120 if (!(val & bits)) 121 return 0; 122 123 val &= ~bits; 124 return pmic_bus_write(reg, val); 125 } 126