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/of.h> 11 #include <linux/of_irq.h> 12 #include <linux/of_platform.h> 13 #include <linux/pm_wakeirq.h> 14 #include <linux/regmap.h> 15 16 #include <dt-bindings/mfd/st,stpmic1.h> 17 18 #define STPMIC1_MAIN_IRQ 0 19 20 static const struct regmap_range stpmic1_readable_ranges[] = { 21 regmap_reg_range(TURN_ON_SR, VERSION_SR), 22 regmap_reg_range(SWOFF_PWRCTRL_CR, LDO6_STDBY_CR), 23 regmap_reg_range(BST_SW_CR, BST_SW_CR), 24 regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4), 25 regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4), 26 regmap_reg_range(INT_MASK_R1, INT_MASK_R4), 27 regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4), 28 regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4), 29 regmap_reg_range(INT_SRC_R1, INT_SRC_R1), 30 }; 31 32 static const struct regmap_range stpmic1_writeable_ranges[] = { 33 regmap_reg_range(SWOFF_PWRCTRL_CR, LDO6_STDBY_CR), 34 regmap_reg_range(BST_SW_CR, BST_SW_CR), 35 regmap_reg_range(INT_CLEAR_R1, INT_CLEAR_R4), 36 regmap_reg_range(INT_SET_MASK_R1, INT_SET_MASK_R4), 37 regmap_reg_range(INT_CLEAR_MASK_R1, INT_CLEAR_MASK_R4), 38 }; 39 40 static const struct regmap_range stpmic1_volatile_ranges[] = { 41 regmap_reg_range(TURN_ON_SR, VERSION_SR), 42 regmap_reg_range(WCHDG_CR, WCHDG_CR), 43 regmap_reg_range(INT_PENDING_R1, INT_PENDING_R4), 44 regmap_reg_range(INT_SRC_R1, INT_SRC_R4), 45 }; 46 47 static const struct regmap_access_table stpmic1_readable_table = { 48 .yes_ranges = stpmic1_readable_ranges, 49 .n_yes_ranges = ARRAY_SIZE(stpmic1_readable_ranges), 50 }; 51 52 static const struct regmap_access_table stpmic1_writeable_table = { 53 .yes_ranges = stpmic1_writeable_ranges, 54 .n_yes_ranges = ARRAY_SIZE(stpmic1_writeable_ranges), 55 }; 56 57 static const struct regmap_access_table stpmic1_volatile_table = { 58 .yes_ranges = stpmic1_volatile_ranges, 59 .n_yes_ranges = ARRAY_SIZE(stpmic1_volatile_ranges), 60 }; 61 62 static const struct regmap_config stpmic1_regmap_config = { 63 .reg_bits = 8, 64 .val_bits = 8, 65 .cache_type = REGCACHE_RBTREE, 66 .max_register = PMIC_MAX_REGISTER_ADDRESS, 67 .rd_table = &stpmic1_readable_table, 68 .wr_table = &stpmic1_writeable_table, 69 .volatile_table = &stpmic1_volatile_table, 70 }; 71 72 static const struct regmap_irq stpmic1_irqs[] = { 73 REGMAP_IRQ_REG(IT_PONKEY_F, 0, 0x01), 74 REGMAP_IRQ_REG(IT_PONKEY_R, 0, 0x02), 75 REGMAP_IRQ_REG(IT_WAKEUP_F, 0, 0x04), 76 REGMAP_IRQ_REG(IT_WAKEUP_R, 0, 0x08), 77 REGMAP_IRQ_REG(IT_VBUS_OTG_F, 0, 0x10), 78 REGMAP_IRQ_REG(IT_VBUS_OTG_R, 0, 0x20), 79 REGMAP_IRQ_REG(IT_SWOUT_F, 0, 0x40), 80 REGMAP_IRQ_REG(IT_SWOUT_R, 0, 0x80), 81 82 REGMAP_IRQ_REG(IT_CURLIM_BUCK1, 1, 0x01), 83 REGMAP_IRQ_REG(IT_CURLIM_BUCK2, 1, 0x02), 84 REGMAP_IRQ_REG(IT_CURLIM_BUCK3, 1, 0x04), 85 REGMAP_IRQ_REG(IT_CURLIM_BUCK4, 1, 0x08), 86 REGMAP_IRQ_REG(IT_OCP_OTG, 1, 0x10), 87 REGMAP_IRQ_REG(IT_OCP_SWOUT, 1, 0x20), 88 REGMAP_IRQ_REG(IT_OCP_BOOST, 1, 0x40), 89 REGMAP_IRQ_REG(IT_OVP_BOOST, 1, 0x80), 90 91 REGMAP_IRQ_REG(IT_CURLIM_LDO1, 2, 0x01), 92 REGMAP_IRQ_REG(IT_CURLIM_LDO2, 2, 0x02), 93 REGMAP_IRQ_REG(IT_CURLIM_LDO3, 2, 0x04), 94 REGMAP_IRQ_REG(IT_CURLIM_LDO4, 2, 0x08), 95 REGMAP_IRQ_REG(IT_CURLIM_LDO5, 2, 0x10), 96 REGMAP_IRQ_REG(IT_CURLIM_LDO6, 2, 0x20), 97 REGMAP_IRQ_REG(IT_SHORT_SWOTG, 2, 0x40), 98 REGMAP_IRQ_REG(IT_SHORT_SWOUT, 2, 0x80), 99 100 REGMAP_IRQ_REG(IT_TWARN_F, 3, 0x01), 101 REGMAP_IRQ_REG(IT_TWARN_R, 3, 0x02), 102 REGMAP_IRQ_REG(IT_VINLOW_F, 3, 0x04), 103 REGMAP_IRQ_REG(IT_VINLOW_R, 3, 0x08), 104 REGMAP_IRQ_REG(IT_SWIN_F, 3, 0x40), 105 REGMAP_IRQ_REG(IT_SWIN_R, 3, 0x80), 106 }; 107 108 static const struct regmap_irq_chip stpmic1_regmap_irq_chip = { 109 .name = "pmic_irq", 110 .status_base = INT_PENDING_R1, 111 .mask_base = INT_CLEAR_MASK_R1, 112 .unmask_base = INT_SET_MASK_R1, 113 .ack_base = INT_CLEAR_R1, 114 .num_regs = STPMIC1_PMIC_NUM_IRQ_REGS, 115 .irqs = stpmic1_irqs, 116 .num_irqs = ARRAY_SIZE(stpmic1_irqs), 117 }; 118 119 static int stpmic1_probe(struct i2c_client *i2c, 120 const struct i2c_device_id *id) 121 { 122 struct stpmic1 *ddata; 123 struct device *dev = &i2c->dev; 124 int ret; 125 struct device_node *np = dev->of_node; 126 u32 reg; 127 128 ddata = devm_kzalloc(dev, sizeof(struct stpmic1), GFP_KERNEL); 129 if (!ddata) 130 return -ENOMEM; 131 132 i2c_set_clientdata(i2c, ddata); 133 ddata->dev = dev; 134 135 ddata->regmap = devm_regmap_init_i2c(i2c, &stpmic1_regmap_config); 136 if (IS_ERR(ddata->regmap)) 137 return PTR_ERR(ddata->regmap); 138 139 ddata->irq = of_irq_get(np, STPMIC1_MAIN_IRQ); 140 if (ddata->irq < 0) { 141 dev_err(dev, "Failed to get main IRQ: %d\n", ddata->irq); 142 return ddata->irq; 143 } 144 145 ret = regmap_read(ddata->regmap, VERSION_SR, ®); 146 if (ret) { 147 dev_err(dev, "Unable to read PMIC version\n"); 148 return ret; 149 } 150 dev_info(dev, "PMIC Chip Version: 0x%x\n", reg); 151 152 /* Initialize PMIC IRQ Chip & associated IRQ domains */ 153 ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq, 154 IRQF_ONESHOT | IRQF_SHARED, 155 0, &stpmic1_regmap_irq_chip, 156 &ddata->irq_data); 157 if (ret) { 158 dev_err(dev, "IRQ Chip registration failed: %d\n", ret); 159 return ret; 160 } 161 162 return devm_of_platform_populate(dev); 163 } 164 165 #ifdef CONFIG_PM_SLEEP 166 static int stpmic1_suspend(struct device *dev) 167 { 168 struct i2c_client *i2c = to_i2c_client(dev); 169 struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c); 170 171 disable_irq(pmic_dev->irq); 172 173 return 0; 174 } 175 176 static int stpmic1_resume(struct device *dev) 177 { 178 struct i2c_client *i2c = to_i2c_client(dev); 179 struct stpmic1 *pmic_dev = i2c_get_clientdata(i2c); 180 int ret; 181 182 ret = regcache_sync(pmic_dev->regmap); 183 if (ret) 184 return ret; 185 186 enable_irq(pmic_dev->irq); 187 188 return 0; 189 } 190 #endif 191 192 static SIMPLE_DEV_PM_OPS(stpmic1_pm, stpmic1_suspend, stpmic1_resume); 193 194 static const struct of_device_id stpmic1_of_match[] = { 195 { .compatible = "st,stpmic1", }, 196 {}, 197 }; 198 MODULE_DEVICE_TABLE(of, stpmic1_of_match); 199 200 static struct i2c_driver stpmic1_driver = { 201 .driver = { 202 .name = "stpmic1", 203 .of_match_table = of_match_ptr(stpmic1_of_match), 204 .pm = &stpmic1_pm, 205 }, 206 .probe = stpmic1_probe, 207 }; 208 209 module_i2c_driver(stpmic1_driver); 210 211 MODULE_DESCRIPTION("STPMIC1 PMIC Driver"); 212 MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>"); 213 MODULE_LICENSE("GPL v2"); 214