1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (C) STMicroelectronics 2018 3 // Author: Pascal Paillet <p.paillet@st.com> 4 5 #include <linux/i2c.h> 6 #include <linux/interrupt.h> 7 #include <linux/mfd/core.h> 8 #include <linux/mfd/stpmic1.h> 9 #include <linux/module.h> 10 #include <linux/reboot.h> 11 #include <linux/of.h> 12 #include <linux/of_irq.h> 13 #include <linux/of_platform.h> 14 #include <linux/pm_wakeirq.h> 15 #include <linux/regmap.h> 16 17 #include <dt-bindings/mfd/st,stpmic1.h> 18 19 #define STPMIC1_MAIN_IRQ 0 20 21 static const struct regmap_range stpmic1_readable_ranges[] = { 22 regmap_reg_range(TURN_ON_SR, VERSION_SR), 23 regmap_reg_range(MAIN_CR, LDO6_STDBY_CR), 24 regmap_reg_range(BST_SW_CR, BST_SW_CR), 25 regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4), 26 regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4), 27 regmap_reg_range(INT_MASK_R1, INT_MASK_R4), 28 regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4), 29 regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4), 30 regmap_reg_range(INT_SRC_R1, INT_SRC_R1), 31 }; 32 33 static const struct regmap_range stpmic1_writeable_ranges[] = { 34 regmap_reg_range(MAIN_CR, LDO6_STDBY_CR), 35 regmap_reg_range(BST_SW_CR, BST_SW_CR), 36 regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4), 37 regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4), 38 regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4), 39 }; 40 41 static const struct regmap_range stpmic1_volatile_ranges[] = { 42 regmap_reg_range(TURN_ON_SR, VERSION_SR), 43 regmap_reg_range(WCHDG_CR, WCHDG_CR), 44 regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4), 45 regmap_reg_range(INT_SRC_R1, INT_SRC_R4), 46 }; 47 48 static const struct regmap_access_table stpmic1_readable_table = { 49 .yes_ranges = stpmic1_readable_ranges, 50 .n_yes_ranges = ARRAY_SIZE(stpmic1_readable_ranges), 51 }; 52 53 static const struct regmap_access_table stpmic1_writeable_table = { 54 .yes_ranges = stpmic1_writeable_ranges, 55 .n_yes_ranges = ARRAY_SIZE(stpmic1_writeable_ranges), 56 }; 57 58 static const struct regmap_access_table stpmic1_volatile_table = { 59 .yes_ranges = stpmic1_volatile_ranges, 60 .n_yes_ranges = ARRAY_SIZE(stpmic1_volatile_ranges), 61 }; 62 63 static const struct regmap_config stpmic1_regmap_config = { 64 .reg_bits = 8, 65 .val_bits = 8, 66 .cache_type = REGCACHE_RBTREE, 67 .max_register = PMIC_MAX_REGISTER_ADDRESS, 68 .rd_table = &stpmic1_readable_table, 69 .wr_table = &stpmic1_writeable_table, 70 .volatile_table = &stpmic1_volatile_table, 71 }; 72 73 static const struct regmap_irq stpmic1_irqs[] = { 74 REGMAP_IRQ_REG(IT_PONKEY_F, 0, 0x01), 75 REGMAP_IRQ_REG(IT_PONKEY_R, 0, 0x02), 76 REGMAP_IRQ_REG(IT_WAKEUP_F, 0, 0x04), 77 REGMAP_IRQ_REG(IT_WAKEUP_R, 0, 0x08), 78 REGMAP_IRQ_REG(IT_VBUS_OTG_F, 0, 0x10), 79 REGMAP_IRQ_REG(IT_VBUS_OTG_R, 0, 0x20), 80 REGMAP_IRQ_REG(IT_SWOUT_F, 0, 0x40), 81 REGMAP_IRQ_REG(IT_SWOUT_R, 0, 0x80), 82 83 REGMAP_IRQ_REG(IT_CURLIM_BUCK1, 1, 0x01), 84 REGMAP_IRQ_REG(IT_CURLIM_BUCK2, 1, 0x02), 85 REGMAP_IRQ_REG(IT_CURLIM_BUCK3, 1, 0x04), 86 REGMAP_IRQ_REG(IT_CURLIM_BUCK4, 1, 0x08), 87 REGMAP_IRQ_REG(IT_OCP_OTG, 1, 0x10), 88 REGMAP_IRQ_REG(IT_OCP_SWOUT, 1, 0x20), 89 REGMAP_IRQ_REG(IT_OCP_BOOST, 1, 0x40), 90 REGMAP_IRQ_REG(IT_OVP_BOOST, 1, 0x80), 91 92 REGMAP_IRQ_REG(IT_CURLIM_LDO1, 2, 0x01), 93 REGMAP_IRQ_REG(IT_CURLIM_LDO2, 2, 0x02), 94 REGMAP_IRQ_REG(IT_CURLIM_LDO3, 2, 0x04), 95 REGMAP_IRQ_REG(IT_CURLIM_LDO4, 2, 0x08), 96 REGMAP_IRQ_REG(IT_CURLIM_LDO5, 2, 0x10), 97 REGMAP_IRQ_REG(IT_CURLIM_LDO6, 2, 0x20), 98 REGMAP_IRQ_REG(IT_SHORT_SWOTG, 2, 0x40), 99 REGMAP_IRQ_REG(IT_SHORT_SWOUT, 2, 0x80), 100 101 REGMAP_IRQ_REG(IT_TWARN_F, 3, 0x01), 102 REGMAP_IRQ_REG(IT_TWARN_R, 3, 0x02), 103 REGMAP_IRQ_REG(IT_VINLOW_F, 3, 0x04), 104 REGMAP_IRQ_REG(IT_VINLOW_R, 3, 0x08), 105 REGMAP_IRQ_REG(IT_SWIN_F, 3, 0x40), 106 REGMAP_IRQ_REG(IT_SWIN_R, 3, 0x80), 107 }; 108 109 static const struct regmap_irq_chip stpmic1_regmap_irq_chip = { 110 .name = "pmic_irq", 111 .status_base = INT_PENDING_R1, 112 .mask_base = INT_SET_MASK_R1, 113 .unmask_base = INT_CLEAR_MASK_R1, 114 .mask_unmask_non_inverted = true, 115 .ack_base = INT_CLEAR_R1, 116 .num_regs = STPMIC1_PMIC_NUM_IRQ_REGS, 117 .irqs = stpmic1_irqs, 118 .num_irqs = ARRAY_SIZE(stpmic1_irqs), 119 }; 120 121 static int stpmic1_power_off(struct sys_off_data *data) 122 { 123 struct stpmic1 *ddata = data->cb_data; 124 125 regmap_update_bits(ddata->regmap, MAIN_CR, 126 SOFTWARE_SWITCH_OFF, SOFTWARE_SWITCH_OFF); 127 128 return NOTIFY_DONE; 129 } 130 131 static int stpmic1_probe(struct i2c_client *i2c) 132 { 133 struct stpmic1 *ddata; 134 struct device *dev = &i2c->dev; 135 int ret; 136 struct device_node *np = dev->of_node; 137 u32 reg; 138 139 ddata = devm_kzalloc(dev, sizeof(struct stpmic1), GFP_KERNEL); 140 if (!ddata) 141 return -ENOMEM; 142 143 i2c_set_clientdata(i2c, ddata); 144 ddata->dev = dev; 145 146 ddata->regmap = devm_regmap_init_i2c(i2c, &stpmic1_regmap_config); 147 if (IS_ERR(ddata->regmap)) 148 return PTR_ERR(ddata->regmap); 149 150 ddata->irq = of_irq_get(np, STPMIC1_MAIN_IRQ); 151 if (ddata->irq < 0) { 152 dev_err(dev, "Failed to get main IRQ: %d\n", ddata->irq); 153 return ddata->irq; 154 } 155 156 ret = regmap_read(ddata->regmap, VERSION_SR, ®); 157 if (ret) { 158 dev_err(dev, "Unable to read PMIC version\n"); 159 return ret; 160 } 161 dev_info(dev, "PMIC Chip Version: 0x%x\n", reg); 162 163 /* Initialize PMIC IRQ Chip & associated IRQ domains */ 164 ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq, 165 IRQF_ONESHOT | IRQF_SHARED, 166 0, &stpmic1_regmap_irq_chip, 167 &ddata->irq_data); 168 if (ret) { 169 dev_err(dev, "IRQ Chip registration failed: %d\n", ret); 170 return ret; 171 } 172 173 ret = devm_register_sys_off_handler(ddata->dev, 174 SYS_OFF_MODE_POWER_OFF, 175 SYS_OFF_PRIO_DEFAULT, 176 stpmic1_power_off, 177 ddata); 178 if (ret) { 179 dev_err(ddata->dev, "failed to register sys-off handler: %d\n", ret); 180 return ret; 181 } 182 183 return devm_of_platform_populate(dev); 184 } 185 186 static int stpmic1_suspend(struct device *dev) 187 { 188 struct i2c_client *i2c = to_i2c_client(dev); 189 struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c); 190 191 disable_irq(pmic_dev->irq); 192 193 return 0; 194 } 195 196 static int stpmic1_resume(struct device *dev) 197 { 198 struct i2c_client *i2c = to_i2c_client(dev); 199 struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c); 200 int ret; 201 202 ret = regcache_sync(pmic_dev->regmap); 203 if (ret) 204 return ret; 205 206 enable_irq(pmic_dev->irq); 207 208 return 0; 209 } 210 211 static DEFINE_SIMPLE_DEV_PM_OPS(stpmic1_pm, stpmic1_suspend, stpmic1_resume); 212 213 static const struct of_device_id stpmic1_of_match[] = { 214 { .compatible = "st,stpmic1", }, 215 {}, 216 }; 217 MODULE_DEVICE_TABLE(of, stpmic1_of_match); 218 219 static struct i2c_driver stpmic1_driver = { 220 .driver = { 221 .name = "stpmic1", 222 .of_match_table = stpmic1_of_match, 223 .pm = pm_sleep_ptr(&stpmic1_pm), 224 }, 225 .probe = stpmic1_probe, 226 }; 227 228 module_i2c_driver(stpmic1_driver); 229 230 MODULE_DESCRIPTION("STPMIC1 PMIC Driver"); 231 MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>"); 232 MODULE_LICENSE("GPL v2"); 233