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_AXP809_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 # elif defined CONFIG_MACH_SUN8I_R40 45 /* Nothing. R40 uses the AXP221s in I2C mode */ 46 ret = 0; 47 # else 48 ret = rsb_init(); 49 if (ret) 50 return ret; 51 52 ret = rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR); 53 # endif 54 if (ret) 55 return ret; 56 #endif 57 58 needs_init = 0; 59 return 0; 60 } 61 62 int pmic_bus_read(u8 reg, u8 *data) 63 { 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); 73 # else 74 return rsb_read(AXP223_RUNTIME_ADDR, reg, data); 75 # endif 76 #endif 77 } 78 79 int pmic_bus_write(u8 reg, u8 data) 80 { 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); 90 # else 91 return rsb_write(AXP223_RUNTIME_ADDR, reg, data); 92 # endif 93 #endif 94 } 95 96 int pmic_bus_setbits(u8 reg, u8 bits) 97 { 98 int ret; 99 u8 val; 100 101 ret = pmic_bus_read(reg, &val); 102 if (ret) 103 return ret; 104 105 val |= bits; 106 return pmic_bus_write(reg, val); 107 } 108 109 int pmic_bus_clrbits(u8 reg, u8 bits) 110 { 111 int ret; 112 u8 val; 113 114 ret = pmic_bus_read(reg, &val); 115 if (ret) 116 return ret; 117 118 val &= ~bits; 119 return pmic_bus_write(reg, val); 120 } 121