projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| cfb61a41 CC |
1 | /* |
| 2 | * axp20x.c - MFD core driver for the X-Powers AXP202 and AXP209 | |
| 3 | * | |
| 4 | * AXP20x comprises an adaptive USB-Compatible PWM charger, 2 BUCK DC-DC | |
| 5 | * converters, 5 LDOs, multiple 12-bit ADCs of voltage, current and temperature | |
| 6 | * as well as 4 configurable GPIOs. | |
| 7 | * | |
| 8 | * Author: Carlo Caione <carlo@caione.org> | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or modify | |
| 11 | * it under the terms of the GNU General Public License version 2 as | |
| 12 | * published by the Free Software Foundation. | |
| 13 | */ | |
| 14 | ||
| 15 | #include <linux/err.h> | |
| 16 | #include <linux/i2c.h> | |
| 17 | #include <linux/interrupt.h> | |
| 18 | #include <linux/kernel.h> | |
| 19 | #include <linux/module.h> | |
| 20 | #include <linux/pm_runtime.h> | |
| 21 | #include <linux/regmap.h> | |
| 22 | #include <linux/slab.h> | |
| 23 | #include <linux/regulator/consumer.h> | |
| 24 | #include <linux/mfd/axp20x.h> | |
| 25 | #include <linux/mfd/core.h> | |
| 26 | #include <linux/of_device.h> | |
| 27 | #include <linux/of_irq.h> | |
| 28 | ||
| 29 | #define AXP20X_OFF 0x80 | |
| 30 | ||
| 31 | static const struct regmap_range axp20x_writeable_ranges[] = { | |
| 32 | regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ5_STATE), | |
| 33 | regmap_reg_range(AXP20X_DCDC_MODE, AXP20X_FG_RES), | |
| 34 | }; | |
| 35 | ||
| 36 | static const struct regmap_range axp20x_volatile_ranges[] = { | |
| 37 | regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IRQ5_STATE), | |
| 38 | }; | |
| 39 | ||
| 40 | static const struct regmap_access_table axp20x_writeable_table = { | |
| 41 | .yes_ranges = axp20x_writeable_ranges, | |
| 42 | .n_yes_ranges = ARRAY_SIZE(axp20x_writeable_ranges), | |
| 43 | }; | |
| 44 | ||
| 45 | static const struct regmap_access_table axp20x_volatile_table = { | |
| 46 | .yes_ranges = axp20x_volatile_ranges, | |
| 47 | .n_yes_ranges = ARRAY_SIZE(axp20x_volatile_ranges), | |
| 48 | }; | |
| 49 | ||
| 50 | static struct resource axp20x_pek_resources[] = { | |
| 51 | { | |
| 52 | .name = "PEK_DBR", | |
| 53 | .start = AXP20X_IRQ_PEK_RIS_EDGE, | |
| 54 | .end = AXP20X_IRQ_PEK_RIS_EDGE, | |
| 55 | .flags = IORESOURCE_IRQ, | |
| 56 | }, { | |
| 57 | .name = "PEK_DBF", | |
| 58 | .start = AXP20X_IRQ_PEK_FAL_EDGE, | |
| 59 | .end = AXP20X_IRQ_PEK_FAL_EDGE, | |
| 60 | .flags = IORESOURCE_IRQ, | |
| 61 | }, | |
| 62 | }; | |
| 63 | ||
| 64 | static const struct regmap_config axp20x_regmap_config = { | |
| 65 | .reg_bits = 8, | |
| 66 | .val_bits = 8, | |
| 67 | .wr_table = &axp20x_writeable_table, | |
| 68 | .volatile_table = &axp20x_volatile_table, | |
| 69 | .max_register = AXP20X_FG_RES, | |
| 70 | .cache_type = REGCACHE_RBTREE, | |
| 71 | }; | |
| 72 | ||
| 73 | #define AXP20X_IRQ(_irq, _off, _mask) \ | |
| 74 | [AXP20X_IRQ_##_irq] = { .reg_offset = (_off), .mask = BIT(_mask) } | |
| 75 | ||
| 76 | static const struct regmap_irq axp20x_regmap_irqs[] = { | |
| 77 | AXP20X_IRQ(ACIN_OVER_V, 0, 7), | |
| 78 | AXP20X_IRQ(ACIN_PLUGIN, 0, 6), | |
| 79 | AXP20X_IRQ(ACIN_REMOVAL, 0, 5), | |
| 80 | AXP20X_IRQ(VBUS_OVER_V, 0, 4), | |
| 81 | AXP20X_IRQ(VBUS_PLUGIN, 0, 3), | |
| 82 | AXP20X_IRQ(VBUS_REMOVAL, 0, 2), | |
| 83 | AXP20X_IRQ(VBUS_V_LOW, 0, 1), | |
| 84 | AXP20X_IRQ(BATT_PLUGIN, 1, 7), | |
| 85 | AXP20X_IRQ(BATT_REMOVAL, 1, 6), | |
| 86 | AXP20X_IRQ(BATT_ENT_ACT_MODE, 1, 5), | |
| 87 | AXP20X_IRQ(BATT_EXIT_ACT_MODE, 1, 4), | |
| 88 | AXP20X_IRQ(CHARG, 1, 3), | |
| 89 | AXP20X_IRQ(CHARG_DONE, 1, 2), | |
| 90 | AXP20X_IRQ(BATT_TEMP_HIGH, 1, 1), | |
| 91 | AXP20X_IRQ(BATT_TEMP_LOW, 1, 0), | |
| 92 | AXP20X_IRQ(DIE_TEMP_HIGH, 2, 7), | |
| 93 | AXP20X_IRQ(CHARG_I_LOW, 2, 6), | |
| 94 | AXP20X_IRQ(DCDC1_V_LONG, 2, 5), | |
| 95 | AXP20X_IRQ(DCDC2_V_LONG, 2, 4), | |
| 96 | AXP20X_IRQ(DCDC3_V_LONG, 2, 3), | |
| 97 | AXP20X_IRQ(PEK_SHORT, 2, 1), | |
| 98 | AXP20X_IRQ(PEK_LONG, 2, 0), | |
| 99 | AXP20X_IRQ(N_OE_PWR_ON, 3, 7), | |
| 100 | AXP20X_IRQ(N_OE_PWR_OFF, 3, 6), | |
| 101 | AXP20X_IRQ(VBUS_VALID, 3, 5), | |
| 102 | AXP20X_IRQ(VBUS_NOT_VALID, 3, 4), | |
| 103 | AXP20X_IRQ(VBUS_SESS_VALID, 3, 3), | |
| 104 | AXP20X_IRQ(VBUS_SESS_END, 3, 2), | |
| 105 | AXP20X_IRQ(LOW_PWR_LVL1, 3, 1), | |
| 106 | AXP20X_IRQ(LOW_PWR_LVL2, 3, 0), | |
| 107 | AXP20X_IRQ(TIMER, 4, 7), | |
| 108 | AXP20X_IRQ(PEK_RIS_EDGE, 4, 6), | |
| 109 | AXP20X_IRQ(PEK_FAL_EDGE, 4, 5), | |
| 110 | AXP20X_IRQ(GPIO3_INPUT, 4, 3), | |
| 111 | AXP20X_IRQ(GPIO2_INPUT, 4, 2), | |
| 112 | AXP20X_IRQ(GPIO1_INPUT, 4, 1), | |
| 113 | AXP20X_IRQ(GPIO0_INPUT, 4, 0), | |
| 114 | }; | |
| 115 | ||
| 116 | static const struct of_device_id axp20x_of_match[] = { | |
| 117 | { .compatible = "x-powers,axp202", .data = (void *) AXP202_ID }, | |
| 118 | { .compatible = "x-powers,axp209", .data = (void *) AXP209_ID }, | |
| 119 | { }, | |
| 120 | }; | |
| 121 | MODULE_DEVICE_TABLE(of, axp20x_of_match); | |
| 122 | ||
| 123 | /* | |
| 124 | * This is useless for OF-enabled devices, but it is needed by I2C subsystem | |
| 125 | */ | |
| 126 | static const struct i2c_device_id axp20x_i2c_id[] = { | |
| 127 | { }, | |
| 128 | }; | |
| 129 | MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id); | |
| 130 | ||
| 131 | static const struct regmap_irq_chip axp20x_regmap_irq_chip = { | |
| 132 | .name = "axp20x_irq_chip", | |
| 133 | .status_base = AXP20X_IRQ1_STATE, | |
| 134 | .ack_base = AXP20X_IRQ1_STATE, | |
| 135 | .mask_base = AXP20X_IRQ1_EN, | |
| 136 | .num_regs = 5, | |
| 137 | .irqs = axp20x_regmap_irqs, | |
| 138 | .num_irqs = ARRAY_SIZE(axp20x_regmap_irqs), | |
| 139 | .mask_invert = true, | |
| 140 | .init_ack_masked = true, | |
| 141 | }; | |
| 142 | ||
| 143 | static const char * const axp20x_supplies[] = { | |
| 144 | "acin", | |
| 145 | "vin2", | |
| 146 | "vin3", | |
| 147 | "ldo24in", | |
| 148 | "ldo3in", | |
| 149 | "ldo5in", | |
| 150 | }; | |
| 151 | ||
| 152 | static struct mfd_cell axp20x_cells[] = { | |
| 153 | { | |
| 154 | .name = "axp20x-pek", | |
| 155 | .num_resources = ARRAY_SIZE(axp20x_pek_resources), | |
| 156 | .resources = axp20x_pek_resources, | |
| 157 | }, { | |
| 158 | .name = "axp20x-regulator", | |
| 159 | .parent_supplies = axp20x_supplies, | |
| 160 | .num_parent_supplies = ARRAY_SIZE(axp20x_supplies), | |
| 161 | }, | |
| 162 | }; | |
| 163 | ||
| 164 | static struct axp20x_dev *axp20x_pm_power_off; | |
| 165 | static void axp20x_power_off(void) | |
| 166 | { | |
| 167 | regmap_write(axp20x_pm_power_off->regmap, AXP20X_OFF_CTRL, | |
| 168 | AXP20X_OFF); | |
| 169 | } | |
| 170 | ||
| 171 | static int axp20x_i2c_probe(struct i2c_client *i2c, | |
| 172 | const struct i2c_device_id *id) | |
| 173 | { | |
| 174 | struct axp20x_dev *axp20x; | |
| 175 | const struct of_device_id *of_id; | |
| 176 | int ret; | |
| 177 | ||
| 178 | axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL); | |
| 179 | if (!axp20x) | |
| 180 | return -ENOMEM; | |
| 181 | ||
| 182 | of_id = of_match_device(axp20x_of_match, &i2c->dev); | |
| 183 | if (!of_id) { | |
| 184 | dev_err(&i2c->dev, "Unable to setup AXP20X data\n"); | |
| 185 | return -ENODEV; | |
| 186 | } | |
| 187 | axp20x->variant = (long) of_id->data; | |
| 188 | ||
| 189 | axp20x->i2c_client = i2c; | |
| 190 | axp20x->dev = &i2c->dev; | |
| 191 | dev_set_drvdata(axp20x->dev, axp20x); | |
| 192 | ||
| 193 | axp20x->regmap = devm_regmap_init_i2c(i2c, &axp20x_regmap_config); | |
| 194 | if (IS_ERR(axp20x->regmap)) { | |
| 195 | ret = PTR_ERR(axp20x->regmap); | |
| 196 | dev_err(&i2c->dev, "regmap init failed: %d\n", ret); | |
| 197 | return ret; | |
| 198 | } | |
| 199 | ||
| 200 | ret = regmap_add_irq_chip(axp20x->regmap, i2c->irq, | |
| 201 | IRQF_ONESHOT | IRQF_SHARED, -1, | |
| 202 | &axp20x_regmap_irq_chip, | |
| 203 | &axp20x->regmap_irqc); | |
| 204 | if (ret) { | |
| 205 | dev_err(&i2c->dev, "failed to add irq chip: %d\n", ret); | |
| 206 | return ret; | |
| 207 | } | |
| 208 | ||
| 209 | ret = mfd_add_devices(axp20x->dev, -1, axp20x_cells, | |
| 210 | ARRAY_SIZE(axp20x_cells), NULL, 0, NULL); | |
| 211 | ||
| 212 | if (ret) { | |
| 213 | dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret); | |
| 214 | regmap_del_irq_chip(i2c->irq, axp20x->regmap_irqc); | |
| 215 | return ret; | |
| 216 | } | |
| 217 | ||
| 218 | if (!pm_power_off) { | |
| 219 | axp20x_pm_power_off = axp20x; | |
| 220 | pm_power_off = axp20x_power_off; | |
| 221 | } | |
| 222 | ||
| 223 | dev_info(&i2c->dev, "AXP20X driver loaded\n"); | |
| 224 | ||
| 225 | return 0; | |
| 226 | } | |
| 227 | ||
| 228 | static int axp20x_i2c_remove(struct i2c_client *i2c) | |
| 229 | { | |
| 230 | struct axp20x_dev *axp20x = i2c_get_clientdata(i2c); | |
| 231 | ||
| 232 | if (axp20x == axp20x_pm_power_off) { | |
| 233 | axp20x_pm_power_off = NULL; | |
| 234 | pm_power_off = NULL; | |
| 235 | } | |
| 236 | ||
| 237 | mfd_remove_devices(axp20x->dev); | |
| 238 | regmap_del_irq_chip(axp20x->i2c_client->irq, axp20x->regmap_irqc); | |
| 239 | ||
| 240 | return 0; | |
| 241 | } | |
| 242 | ||
| 243 | static struct i2c_driver axp20x_i2c_driver = { | |
| 244 | .driver = { | |
| 245 | .name = "axp20x", | |
| 246 | .owner = THIS_MODULE, | |
| 247 | .of_match_table = of_match_ptr(axp20x_of_match), | |
| 248 | }, | |
| 249 | .probe = axp20x_i2c_probe, | |
| 250 | .remove = axp20x_i2c_remove, | |
| 251 | .id_table = axp20x_i2c_id, | |
| 252 | }; | |
| 253 | ||
| 254 | module_i2c_driver(axp20x_i2c_driver); | |
| 255 | ||
| 256 | MODULE_DESCRIPTION("PMIC MFD core driver for AXP20X"); | |
| 257 | MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); | |
| 258 | MODULE_LICENSE("GPL"); |