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1// SPDX-License-Identifier: GPL-2.02//3// Copyright (C) 2018 BayLibre SAS4// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>5//6// Core MFD driver for MAXIM 77650/77651 charger/power-supply.7// Programming manual: https://pdfserv.maximintegrated.com/en/an/AN6428.pdf8 9#include <linux/i2c.h>10#include <linux/interrupt.h>11#include <linux/irq.h>12#include <linux/mfd/core.h>13#include <linux/mfd/max77650.h>14#include <linux/module.h>15#include <linux/of.h>16#include <linux/regmap.h>17 18#define MAX77650_INT_GPI_F_MSK BIT(0)19#define MAX77650_INT_GPI_R_MSK BIT(1)20#define MAX77650_INT_GPI_MSK \21 (MAX77650_INT_GPI_F_MSK | MAX77650_INT_GPI_R_MSK)22#define MAX77650_INT_nEN_F_MSK BIT(2)23#define MAX77650_INT_nEN_R_MSK BIT(3)24#define MAX77650_INT_TJAL1_R_MSK BIT(4)25#define MAX77650_INT_TJAL2_R_MSK BIT(5)26#define MAX77650_INT_DOD_R_MSK BIT(6)27 28#define MAX77650_INT_THM_MSK BIT(0)29#define MAX77650_INT_CHG_MSK BIT(1)30#define MAX77650_INT_CHGIN_MSK BIT(2)31#define MAX77650_INT_TJ_REG_MSK BIT(3)32#define MAX77650_INT_CHGIN_CTRL_MSK BIT(4)33#define MAX77650_INT_SYS_CTRL_MSK BIT(5)34#define MAX77650_INT_SYS_CNFG_MSK BIT(6)35 36#define MAX77650_INT_GLBL_OFFSET 037#define MAX77650_INT_CHG_OFFSET 138 39#define MAX77650_SBIA_LPM_MASK BIT(5)40#define MAX77650_SBIA_LPM_DISABLED 0x0041 42enum {43 MAX77650_INT_GPI,44 MAX77650_INT_nEN_F,45 MAX77650_INT_nEN_R,46 MAX77650_INT_TJAL1_R,47 MAX77650_INT_TJAL2_R,48 MAX77650_INT_DOD_R,49 MAX77650_INT_THM,50 MAX77650_INT_CHG,51 MAX77650_INT_CHGIN,52 MAX77650_INT_TJ_REG,53 MAX77650_INT_CHGIN_CTRL,54 MAX77650_INT_SYS_CTRL,55 MAX77650_INT_SYS_CNFG,56};57 58static const struct resource max77650_charger_resources[] = {59 DEFINE_RES_IRQ_NAMED(MAX77650_INT_CHG, "CHG"),60 DEFINE_RES_IRQ_NAMED(MAX77650_INT_CHGIN, "CHGIN"),61};62 63static const struct resource max77650_gpio_resources[] = {64 DEFINE_RES_IRQ_NAMED(MAX77650_INT_GPI, "GPI"),65};66 67static const struct resource max77650_onkey_resources[] = {68 DEFINE_RES_IRQ_NAMED(MAX77650_INT_nEN_F, "nEN_F"),69 DEFINE_RES_IRQ_NAMED(MAX77650_INT_nEN_R, "nEN_R"),70};71 72static const struct mfd_cell max77650_cells[] = {73 {74 .name = "max77650-regulator",75 .of_compatible = "maxim,max77650-regulator",76 }, {77 .name = "max77650-charger",78 .of_compatible = "maxim,max77650-charger",79 .resources = max77650_charger_resources,80 .num_resources = ARRAY_SIZE(max77650_charger_resources),81 }, {82 .name = "max77650-gpio",83 .of_compatible = "maxim,max77650-gpio",84 .resources = max77650_gpio_resources,85 .num_resources = ARRAY_SIZE(max77650_gpio_resources),86 }, {87 .name = "max77650-led",88 .of_compatible = "maxim,max77650-led",89 }, {90 .name = "max77650-onkey",91 .of_compatible = "maxim,max77650-onkey",92 .resources = max77650_onkey_resources,93 .num_resources = ARRAY_SIZE(max77650_onkey_resources),94 },95};96 97static const struct regmap_irq max77650_irqs[] = {98 [MAX77650_INT_GPI] = {99 .reg_offset = MAX77650_INT_GLBL_OFFSET,100 .mask = MAX77650_INT_GPI_MSK,101 .type = {102 .type_falling_val = MAX77650_INT_GPI_F_MSK,103 .type_rising_val = MAX77650_INT_GPI_R_MSK,104 .types_supported = IRQ_TYPE_EDGE_BOTH,105 },106 },107 REGMAP_IRQ_REG(MAX77650_INT_nEN_F,108 MAX77650_INT_GLBL_OFFSET, MAX77650_INT_nEN_F_MSK),109 REGMAP_IRQ_REG(MAX77650_INT_nEN_R,110 MAX77650_INT_GLBL_OFFSET, MAX77650_INT_nEN_R_MSK),111 REGMAP_IRQ_REG(MAX77650_INT_TJAL1_R,112 MAX77650_INT_GLBL_OFFSET, MAX77650_INT_TJAL1_R_MSK),113 REGMAP_IRQ_REG(MAX77650_INT_TJAL2_R,114 MAX77650_INT_GLBL_OFFSET, MAX77650_INT_TJAL2_R_MSK),115 REGMAP_IRQ_REG(MAX77650_INT_DOD_R,116 MAX77650_INT_GLBL_OFFSET, MAX77650_INT_DOD_R_MSK),117 REGMAP_IRQ_REG(MAX77650_INT_THM,118 MAX77650_INT_CHG_OFFSET, MAX77650_INT_THM_MSK),119 REGMAP_IRQ_REG(MAX77650_INT_CHG,120 MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHG_MSK),121 REGMAP_IRQ_REG(MAX77650_INT_CHGIN,122 MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHGIN_MSK),123 REGMAP_IRQ_REG(MAX77650_INT_TJ_REG,124 MAX77650_INT_CHG_OFFSET, MAX77650_INT_TJ_REG_MSK),125 REGMAP_IRQ_REG(MAX77650_INT_CHGIN_CTRL,126 MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHGIN_CTRL_MSK),127 REGMAP_IRQ_REG(MAX77650_INT_SYS_CTRL,128 MAX77650_INT_CHG_OFFSET, MAX77650_INT_SYS_CTRL_MSK),129 REGMAP_IRQ_REG(MAX77650_INT_SYS_CNFG,130 MAX77650_INT_CHG_OFFSET, MAX77650_INT_SYS_CNFG_MSK),131};132 133static const struct regmap_irq_chip max77650_irq_chip = {134 .name = "max77650-irq",135 .irqs = max77650_irqs,136 .num_irqs = ARRAY_SIZE(max77650_irqs),137 .num_regs = 2,138 .status_base = MAX77650_REG_INT_GLBL,139 .mask_base = MAX77650_REG_INTM_GLBL,140 .type_in_mask = true,141 .init_ack_masked = true,142 .clear_on_unmask = true,143};144 145static const struct regmap_config max77650_regmap_config = {146 .name = "max77650",147 .reg_bits = 8,148 .val_bits = 8,149};150 151static int max77650_i2c_probe(struct i2c_client *i2c)152{153 struct regmap_irq_chip_data *irq_data;154 struct device *dev = &i2c->dev;155 struct irq_domain *domain;156 struct regmap *map;157 unsigned int val;158 int rv, id;159 160 map = devm_regmap_init_i2c(i2c, &max77650_regmap_config);161 if (IS_ERR(map)) {162 dev_err(dev, "Unable to initialise I2C Regmap\n");163 return PTR_ERR(map);164 }165 166 rv = regmap_read(map, MAX77650_REG_CID, &val);167 if (rv) {168 dev_err(dev, "Unable to read Chip ID\n");169 return rv;170 }171 172 id = MAX77650_CID_BITS(val);173 switch (id) {174 case MAX77650_CID_77650A:175 case MAX77650_CID_77650C:176 case MAX77650_CID_77651A:177 case MAX77650_CID_77651B:178 break;179 default:180 dev_err(dev, "Chip not supported - ID: 0x%02x\n", id);181 return -ENODEV;182 }183 184 /*185 * This IC has a low-power mode which reduces the quiescent current186 * consumption to ~5.6uA but is only suitable for systems consuming187 * less than ~2mA. Since this is not likely the case even on188 * linux-based wearables - keep the chip in normal power mode.189 */190 rv = regmap_update_bits(map,191 MAX77650_REG_CNFG_GLBL,192 MAX77650_SBIA_LPM_MASK,193 MAX77650_SBIA_LPM_DISABLED);194 if (rv) {195 dev_err(dev, "Unable to change the power mode\n");196 return rv;197 }198 199 rv = devm_regmap_add_irq_chip(dev, map, i2c->irq,200 IRQF_ONESHOT | IRQF_SHARED, 0,201 &max77650_irq_chip, &irq_data);202 if (rv) {203 dev_err(dev, "Unable to add Regmap IRQ chip\n");204 return rv;205 }206 207 domain = regmap_irq_get_domain(irq_data);208 209 return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,210 max77650_cells, ARRAY_SIZE(max77650_cells),211 NULL, 0, domain);212}213 214static const struct of_device_id max77650_of_match[] = {215 { .compatible = "maxim,max77650" },216 { }217};218MODULE_DEVICE_TABLE(of, max77650_of_match);219 220static struct i2c_driver max77650_i2c_driver = {221 .driver = {222 .name = "max77650",223 .of_match_table = max77650_of_match,224 },225 .probe = max77650_i2c_probe,226};227module_i2c_driver(max77650_i2c_driver);228 229MODULE_DESCRIPTION("MAXIM 77650/77651 multi-function core driver");230MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");231MODULE_LICENSE("GPL v2");232