1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2021, The Linux Foundation. All rights reserved. 4 */ 5 6 #include <linux/bitops.h> 7 #include <linux/i2c.h> 8 #include <linux/interrupt.h> 9 #include <linux/irq.h> 10 #include <linux/irqdomain.h> 11 #include <linux/module.h> 12 #include <linux/of_device.h> 13 #include <linux/of_platform.h> 14 #include <linux/pinctrl/consumer.h> 15 #include <linux/regmap.h> 16 #include <linux/slab.h> 17 18 #include <dt-bindings/mfd/qcom-pm8008.h> 19 20 #define I2C_INTR_STATUS_BASE 0x0550 21 #define INT_RT_STS_OFFSET 0x10 22 #define INT_SET_TYPE_OFFSET 0x11 23 #define INT_POL_HIGH_OFFSET 0x12 24 #define INT_POL_LOW_OFFSET 0x13 25 #define INT_LATCHED_CLR_OFFSET 0x14 26 #define INT_EN_SET_OFFSET 0x15 27 #define INT_EN_CLR_OFFSET 0x16 28 #define INT_LATCHED_STS_OFFSET 0x18 29 30 enum { 31 PM8008_MISC, 32 PM8008_TEMP_ALARM, 33 PM8008_GPIO1, 34 PM8008_GPIO2, 35 PM8008_NUM_PERIPHS, 36 }; 37 38 #define PM8008_PERIPH_0_BASE 0x900 39 #define PM8008_PERIPH_1_BASE 0x2400 40 #define PM8008_PERIPH_2_BASE 0xC000 41 #define PM8008_PERIPH_3_BASE 0xC100 42 43 #define PM8008_TEMP_ALARM_ADDR PM8008_PERIPH_1_BASE 44 #define PM8008_GPIO1_ADDR PM8008_PERIPH_2_BASE 45 #define PM8008_GPIO2_ADDR PM8008_PERIPH_3_BASE 46 47 #define PM8008_STATUS_BASE (PM8008_PERIPH_0_BASE | INT_LATCHED_STS_OFFSET) 48 #define PM8008_MASK_BASE (PM8008_PERIPH_0_BASE | INT_EN_SET_OFFSET) 49 #define PM8008_UNMASK_BASE (PM8008_PERIPH_0_BASE | INT_EN_CLR_OFFSET) 50 #define PM8008_TYPE_BASE (PM8008_PERIPH_0_BASE | INT_SET_TYPE_OFFSET) 51 #define PM8008_ACK_BASE (PM8008_PERIPH_0_BASE | INT_LATCHED_CLR_OFFSET) 52 #define PM8008_POLARITY_HI_BASE (PM8008_PERIPH_0_BASE | INT_POL_HIGH_OFFSET) 53 #define PM8008_POLARITY_LO_BASE (PM8008_PERIPH_0_BASE | INT_POL_LOW_OFFSET) 54 55 #define PM8008_PERIPH_OFFSET(paddr) (paddr - PM8008_PERIPH_0_BASE) 56 57 struct pm8008_data { 58 struct device *dev; 59 struct regmap *regmap; 60 int irq; 61 struct regmap_irq_chip_data *irq_data; 62 }; 63 64 static unsigned int p0_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_0_BASE)}; 65 static unsigned int p1_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_1_BASE)}; 66 static unsigned int p2_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_2_BASE)}; 67 static unsigned int p3_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_3_BASE)}; 68 69 static struct regmap_irq_sub_irq_map pm8008_sub_reg_offsets[] = { 70 REGMAP_IRQ_MAIN_REG_OFFSET(p0_offs), 71 REGMAP_IRQ_MAIN_REG_OFFSET(p1_offs), 72 REGMAP_IRQ_MAIN_REG_OFFSET(p2_offs), 73 REGMAP_IRQ_MAIN_REG_OFFSET(p3_offs), 74 }; 75 76 static unsigned int pm8008_virt_regs[] = { 77 PM8008_POLARITY_HI_BASE, 78 PM8008_POLARITY_LO_BASE, 79 }; 80 81 enum { 82 POLARITY_HI_INDEX, 83 POLARITY_LO_INDEX, 84 PM8008_NUM_VIRT_REGS, 85 }; 86 87 static struct regmap_irq pm8008_irqs[] = { 88 REGMAP_IRQ_REG(PM8008_IRQ_MISC_UVLO, PM8008_MISC, BIT(0)), 89 REGMAP_IRQ_REG(PM8008_IRQ_MISC_OVLO, PM8008_MISC, BIT(1)), 90 REGMAP_IRQ_REG(PM8008_IRQ_MISC_OTST2, PM8008_MISC, BIT(2)), 91 REGMAP_IRQ_REG(PM8008_IRQ_MISC_OTST3, PM8008_MISC, BIT(3)), 92 REGMAP_IRQ_REG(PM8008_IRQ_MISC_LDO_OCP, PM8008_MISC, BIT(4)), 93 REGMAP_IRQ_REG(PM8008_IRQ_TEMP_ALARM, PM8008_TEMP_ALARM, BIT(0)), 94 REGMAP_IRQ_REG(PM8008_IRQ_GPIO1, PM8008_GPIO1, BIT(0)), 95 REGMAP_IRQ_REG(PM8008_IRQ_GPIO2, PM8008_GPIO2, BIT(0)), 96 }; 97 98 static int pm8008_set_type_virt(unsigned int **virt_buf, 99 unsigned int type, unsigned long hwirq, 100 int reg) 101 { 102 switch (type) { 103 case IRQ_TYPE_EDGE_FALLING: 104 case IRQ_TYPE_LEVEL_LOW: 105 virt_buf[POLARITY_HI_INDEX][reg] &= ~pm8008_irqs[hwirq].mask; 106 virt_buf[POLARITY_LO_INDEX][reg] |= pm8008_irqs[hwirq].mask; 107 break; 108 109 case IRQ_TYPE_EDGE_RISING: 110 case IRQ_TYPE_LEVEL_HIGH: 111 virt_buf[POLARITY_HI_INDEX][reg] |= pm8008_irqs[hwirq].mask; 112 virt_buf[POLARITY_LO_INDEX][reg] &= ~pm8008_irqs[hwirq].mask; 113 break; 114 115 case IRQ_TYPE_EDGE_BOTH: 116 virt_buf[POLARITY_HI_INDEX][reg] |= pm8008_irqs[hwirq].mask; 117 virt_buf[POLARITY_LO_INDEX][reg] |= pm8008_irqs[hwirq].mask; 118 break; 119 120 default: 121 return -EINVAL; 122 } 123 124 return 0; 125 } 126 127 static struct regmap_irq_chip pm8008_irq_chip = { 128 .name = "pm8008_irq", 129 .main_status = I2C_INTR_STATUS_BASE, 130 .num_main_regs = 1, 131 .num_virt_regs = PM8008_NUM_VIRT_REGS, 132 .irqs = pm8008_irqs, 133 .num_irqs = ARRAY_SIZE(pm8008_irqs), 134 .num_regs = PM8008_NUM_PERIPHS, 135 .not_fixed_stride = true, 136 .sub_reg_offsets = pm8008_sub_reg_offsets, 137 .set_type_virt = pm8008_set_type_virt, 138 .status_base = PM8008_STATUS_BASE, 139 .mask_base = PM8008_MASK_BASE, 140 .unmask_base = PM8008_UNMASK_BASE, 141 .type_base = PM8008_TYPE_BASE, 142 .ack_base = PM8008_ACK_BASE, 143 .virt_reg_base = pm8008_virt_regs, 144 .num_type_reg = PM8008_NUM_PERIPHS, 145 }; 146 147 static struct regmap_config qcom_mfd_regmap_cfg = { 148 .reg_bits = 16, 149 .val_bits = 8, 150 .max_register = 0xFFFF, 151 }; 152 153 static int pm8008_init(struct pm8008_data *chip) 154 { 155 int rc; 156 157 /* 158 * Set TEMP_ALARM peripheral's TYPE so that the regmap-irq framework 159 * reads this as the default value instead of zero, the HW default. 160 * This is required to enable the writing of TYPE registers in 161 * regmap_irq_sync_unlock(). 162 */ 163 rc = regmap_write(chip->regmap, 164 (PM8008_TEMP_ALARM_ADDR | INT_SET_TYPE_OFFSET), 165 BIT(0)); 166 if (rc) 167 return rc; 168 169 /* Do the same for GPIO1 and GPIO2 peripherals */ 170 rc = regmap_write(chip->regmap, 171 (PM8008_GPIO1_ADDR | INT_SET_TYPE_OFFSET), BIT(0)); 172 if (rc) 173 return rc; 174 175 rc = regmap_write(chip->regmap, 176 (PM8008_GPIO2_ADDR | INT_SET_TYPE_OFFSET), BIT(0)); 177 178 return rc; 179 } 180 181 static int pm8008_probe_irq_peripherals(struct pm8008_data *chip, 182 int client_irq) 183 { 184 int rc, i; 185 struct regmap_irq_type *type; 186 struct regmap_irq_chip_data *irq_data; 187 188 rc = pm8008_init(chip); 189 if (rc) { 190 dev_err(chip->dev, "Init failed: %d\n", rc); 191 return rc; 192 } 193 194 for (i = 0; i < ARRAY_SIZE(pm8008_irqs); i++) { 195 type = &pm8008_irqs[i].type; 196 197 type->type_reg_offset = pm8008_irqs[i].reg_offset; 198 type->type_rising_val = pm8008_irqs[i].mask; 199 type->type_falling_val = pm8008_irqs[i].mask; 200 type->type_level_high_val = 0; 201 type->type_level_low_val = 0; 202 203 if (type->type_reg_offset == PM8008_MISC) 204 type->types_supported = IRQ_TYPE_EDGE_RISING; 205 else 206 type->types_supported = (IRQ_TYPE_EDGE_BOTH | 207 IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW); 208 } 209 210 rc = devm_regmap_add_irq_chip(chip->dev, chip->regmap, client_irq, 211 IRQF_SHARED, 0, &pm8008_irq_chip, &irq_data); 212 if (rc) { 213 dev_err(chip->dev, "Failed to add IRQ chip: %d\n", rc); 214 return rc; 215 } 216 217 return 0; 218 } 219 220 static int pm8008_probe(struct i2c_client *client) 221 { 222 int rc; 223 struct pm8008_data *chip; 224 225 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); 226 if (!chip) 227 return -ENOMEM; 228 229 chip->dev = &client->dev; 230 chip->regmap = devm_regmap_init_i2c(client, &qcom_mfd_regmap_cfg); 231 if (!chip->regmap) 232 return -ENODEV; 233 234 i2c_set_clientdata(client, chip); 235 236 if (of_property_read_bool(chip->dev->of_node, "interrupt-controller")) { 237 rc = pm8008_probe_irq_peripherals(chip, client->irq); 238 if (rc) 239 dev_err(chip->dev, "Failed to probe irq periphs: %d\n", rc); 240 } 241 242 return devm_of_platform_populate(chip->dev); 243 } 244 245 static const struct of_device_id pm8008_match[] = { 246 { .compatible = "qcom,pm8008", }, 247 { }, 248 }; 249 250 static struct i2c_driver pm8008_mfd_driver = { 251 .driver = { 252 .name = "pm8008", 253 .of_match_table = pm8008_match, 254 }, 255 .probe_new = pm8008_probe, 256 }; 257 module_i2c_driver(pm8008_mfd_driver); 258 259 MODULE_LICENSE("GPL v2"); 260 MODULE_ALIAS("i2c:qcom-pm8008"); 261