// SPDX-License-Identifier: GPL-2.0 // // Copyright (C) 2018 BayLibre SAS // Author: Bartosz Golaszewski // // Core MFD driver for MAXIM 77650/77651 charger/power-supply. // Programming manual: https://pdfserv.maximintegrated.com/en/an/AN6428.pdf #include #include #include #include #include #include #include #include #define MAX77650_INT_GPI_F_MSK BIT(0) #define MAX77650_INT_GPI_R_MSK BIT(1) #define MAX77650_INT_GPI_MSK \ (MAX77650_INT_GPI_F_MSK | MAX77650_INT_GPI_R_MSK) #define MAX77650_INT_nEN_F_MSK BIT(2) #define MAX77650_INT_nEN_R_MSK BIT(3) #define MAX77650_INT_TJAL1_R_MSK BIT(4) #define MAX77650_INT_TJAL2_R_MSK BIT(5) #define MAX77650_INT_DOD_R_MSK BIT(6) #define MAX77650_INT_THM_MSK BIT(0) #define MAX77650_INT_CHG_MSK BIT(1) #define MAX77650_INT_CHGIN_MSK BIT(2) #define MAX77650_INT_TJ_REG_MSK BIT(3) #define MAX77650_INT_CHGIN_CTRL_MSK BIT(4) #define MAX77650_INT_SYS_CTRL_MSK BIT(5) #define MAX77650_INT_SYS_CNFG_MSK BIT(6) #define MAX77650_INT_GLBL_OFFSET 0 #define MAX77650_INT_CHG_OFFSET 1 #define MAX77650_SBIA_LPM_MASK BIT(5) #define MAX77650_SBIA_LPM_DISABLED 0x00 enum { MAX77650_INT_GPI, MAX77650_INT_nEN_F, MAX77650_INT_nEN_R, MAX77650_INT_TJAL1_R, MAX77650_INT_TJAL2_R, MAX77650_INT_DOD_R, MAX77650_INT_THM, MAX77650_INT_CHG, MAX77650_INT_CHGIN, MAX77650_INT_TJ_REG, MAX77650_INT_CHGIN_CTRL, MAX77650_INT_SYS_CTRL, MAX77650_INT_SYS_CNFG, }; static const struct resource max77650_charger_resources[] = { DEFINE_RES_IRQ_NAMED(MAX77650_INT_CHG, "CHG"), DEFINE_RES_IRQ_NAMED(MAX77650_INT_CHGIN, "CHGIN"), }; static const struct resource max77650_gpio_resources[] = { DEFINE_RES_IRQ_NAMED(MAX77650_INT_GPI, "GPI"), }; static const struct resource max77650_onkey_resources[] = { DEFINE_RES_IRQ_NAMED(MAX77650_INT_nEN_F, "nEN_F"), DEFINE_RES_IRQ_NAMED(MAX77650_INT_nEN_R, "nEN_R"), }; static const struct mfd_cell max77650_cells[] = { { .name = "max77650-regulator", .of_compatible = "maxim,max77650-regulator", }, { .name = "max77650-charger", .of_compatible = "maxim,max77650-charger", .resources = max77650_charger_resources, .num_resources = ARRAY_SIZE(max77650_charger_resources), }, { .name = "max77650-gpio", .of_compatible = "maxim,max77650-gpio", .resources = max77650_gpio_resources, .num_resources = ARRAY_SIZE(max77650_gpio_resources), }, { .name = "max77650-led", .of_compatible = "maxim,max77650-led", }, { .name = "max77650-onkey", .of_compatible = "maxim,max77650-onkey", .resources = max77650_onkey_resources, .num_resources = ARRAY_SIZE(max77650_onkey_resources), }, }; static const struct regmap_irq max77650_irqs[] = { [MAX77650_INT_GPI] = { .reg_offset = MAX77650_INT_GLBL_OFFSET, .mask = MAX77650_INT_GPI_MSK, .type = { .type_falling_val = MAX77650_INT_GPI_F_MSK, .type_rising_val = MAX77650_INT_GPI_R_MSK, .types_supported = IRQ_TYPE_EDGE_BOTH, }, }, REGMAP_IRQ_REG(MAX77650_INT_nEN_F, MAX77650_INT_GLBL_OFFSET, MAX77650_INT_nEN_F_MSK), REGMAP_IRQ_REG(MAX77650_INT_nEN_R, MAX77650_INT_GLBL_OFFSET, MAX77650_INT_nEN_R_MSK), REGMAP_IRQ_REG(MAX77650_INT_TJAL1_R, MAX77650_INT_GLBL_OFFSET, MAX77650_INT_TJAL1_R_MSK), REGMAP_IRQ_REG(MAX77650_INT_TJAL2_R, MAX77650_INT_GLBL_OFFSET, MAX77650_INT_TJAL2_R_MSK), REGMAP_IRQ_REG(MAX77650_INT_DOD_R, MAX77650_INT_GLBL_OFFSET, MAX77650_INT_DOD_R_MSK), REGMAP_IRQ_REG(MAX77650_INT_THM, MAX77650_INT_CHG_OFFSET, MAX77650_INT_THM_MSK), REGMAP_IRQ_REG(MAX77650_INT_CHG, MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHG_MSK), REGMAP_IRQ_REG(MAX77650_INT_CHGIN, MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHGIN_MSK), REGMAP_IRQ_REG(MAX77650_INT_TJ_REG, MAX77650_INT_CHG_OFFSET, MAX77650_INT_TJ_REG_MSK), REGMAP_IRQ_REG(MAX77650_INT_CHGIN_CTRL, MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHGIN_CTRL_MSK), REGMAP_IRQ_REG(MAX77650_INT_SYS_CTRL, MAX77650_INT_CHG_OFFSET, MAX77650_INT_SYS_CTRL_MSK), REGMAP_IRQ_REG(MAX77650_INT_SYS_CNFG, MAX77650_INT_CHG_OFFSET, MAX77650_INT_SYS_CNFG_MSK), }; static const struct regmap_irq_chip max77650_irq_chip = { .name = "max77650-irq", .irqs = max77650_irqs, .num_irqs = ARRAY_SIZE(max77650_irqs), .num_regs = 2, .status_base = MAX77650_REG_INT_GLBL, .mask_base = MAX77650_REG_INTM_GLBL, .type_in_mask = true, .type_invert = true, .init_ack_masked = true, .clear_on_unmask = true, }; static const struct regmap_config max77650_regmap_config = { .name = "max77650", .reg_bits = 8, .val_bits = 8, }; static int max77650_i2c_probe(struct i2c_client *i2c) { struct regmap_irq_chip_data *irq_data; struct device *dev = &i2c->dev; struct irq_domain *domain; struct regmap *map; unsigned int val; int rv, id; map = devm_regmap_init_i2c(i2c, &max77650_regmap_config); if (IS_ERR(map)) { dev_err(dev, "Unable to initialise I2C Regmap\n"); return PTR_ERR(map); } rv = regmap_read(map, MAX77650_REG_CID, &val); if (rv) { dev_err(dev, "Unable to read Chip ID\n"); return rv; } id = MAX77650_CID_BITS(val); switch (id) { case MAX77650_CID_77650A: case MAX77650_CID_77650C: case MAX77650_CID_77651A: case MAX77650_CID_77651B: break; default: dev_err(dev, "Chip not supported - ID: 0x%02x\n", id); return -ENODEV; } /* * This IC has a low-power mode which reduces the quiescent current * consumption to ~5.6uA but is only suitable for systems consuming * less than ~2mA. Since this is not likely the case even on * linux-based wearables - keep the chip in normal power mode. */ rv = regmap_update_bits(map, MAX77650_REG_CNFG_GLBL, MAX77650_SBIA_LPM_MASK, MAX77650_SBIA_LPM_DISABLED); if (rv) { dev_err(dev, "Unable to change the power mode\n"); return rv; } rv = devm_regmap_add_irq_chip(dev, map, i2c->irq, IRQF_ONESHOT | IRQF_SHARED, 0, &max77650_irq_chip, &irq_data); if (rv) { dev_err(dev, "Unable to add Regmap IRQ chip\n"); return rv; } domain = regmap_irq_get_domain(irq_data); return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, max77650_cells, ARRAY_SIZE(max77650_cells), NULL, 0, domain); } static const struct of_device_id max77650_of_match[] = { { .compatible = "maxim,max77650" }, { } }; MODULE_DEVICE_TABLE(of, max77650_of_match); static struct i2c_driver max77650_i2c_driver = { .driver = { .name = "max77650", .of_match_table = of_match_ptr(max77650_of_match), }, .probe_new = max77650_i2c_probe, }; module_i2c_driver(max77650_i2c_driver); MODULE_DESCRIPTION("MAXIM 77650/77651 multi-function core driver"); MODULE_AUTHOR("Bartosz Golaszewski "); MODULE_LICENSE("GPL v2");