// SPDX-License-Identifier: GPL-2.0+ /* * Core support for ATC260x PMICs * * Copyright (C) 2019 Manivannan Sadhasivam * Copyright (C) 2020 Cristian Ciocaltea */ #include #include #include #include #include #include #define ATC260X_CHIP_REV_MAX 31 struct atc260x_init_regs { unsigned int cmu_devrst; unsigned int cmu_devrst_ints; unsigned int ints_msk; unsigned int pad_en; unsigned int pad_en_extirq; }; static void regmap_lock_mutex(void *__mutex) { struct mutex *mutex = __mutex; /* * Using regmap within an atomic context (e.g. accessing a PMIC when * powering system down) is normally allowed only if the regmap type * is MMIO and the regcache type is either REGCACHE_NONE or * REGCACHE_FLAT. For slow buses like I2C and SPI, the regmap is * internally protected by a mutex which is acquired non-atomically. * * Let's improve this by using a customized locking scheme inspired * from I2C atomic transfer. See i2c_in_atomic_xfer_mode() for a * starting point. */ if (system_state > SYSTEM_RUNNING && irqs_disabled()) mutex_trylock(mutex); else mutex_lock(mutex); } static void regmap_unlock_mutex(void *__mutex) { struct mutex *mutex = __mutex; mutex_unlock(mutex); } static const struct regmap_config atc2603c_regmap_config = { .reg_bits = 8, .val_bits = 16, .max_register = ATC2603C_SADDR, .cache_type = REGCACHE_NONE, }; static const struct regmap_config atc2609a_regmap_config = { .reg_bits = 8, .val_bits = 16, .max_register = ATC2609A_SADDR, .cache_type = REGCACHE_NONE, }; static const struct regmap_irq atc2603c_regmap_irqs[] = { REGMAP_IRQ_REG(ATC2603C_IRQ_AUDIO, 0, ATC2603C_INTS_MSK_AUDIO), REGMAP_IRQ_REG(ATC2603C_IRQ_OV, 0, ATC2603C_INTS_MSK_OV), REGMAP_IRQ_REG(ATC2603C_IRQ_OC, 0, ATC2603C_INTS_MSK_OC), REGMAP_IRQ_REG(ATC2603C_IRQ_OT, 0, ATC2603C_INTS_MSK_OT), REGMAP_IRQ_REG(ATC2603C_IRQ_UV, 0, ATC2603C_INTS_MSK_UV), REGMAP_IRQ_REG(ATC2603C_IRQ_ALARM, 0, ATC2603C_INTS_MSK_ALARM), REGMAP_IRQ_REG(ATC2603C_IRQ_ONOFF, 0, ATC2603C_INTS_MSK_ONOFF), REGMAP_IRQ_REG(ATC2603C_IRQ_SGPIO, 0, ATC2603C_INTS_MSK_SGPIO), REGMAP_IRQ_REG(ATC2603C_IRQ_IR, 0, ATC2603C_INTS_MSK_IR), REGMAP_IRQ_REG(ATC2603C_IRQ_REMCON, 0, ATC2603C_INTS_MSK_REMCON), REGMAP_IRQ_REG(ATC2603C_IRQ_POWER_IN, 0, ATC2603C_INTS_MSK_POWERIN), }; static const struct regmap_irq atc2609a_regmap_irqs[] = { REGMAP_IRQ_REG(ATC2609A_IRQ_AUDIO, 0, ATC2609A_INTS_MSK_AUDIO), REGMAP_IRQ_REG(ATC2609A_IRQ_OV, 0, ATC2609A_INTS_MSK_OV), REGMAP_IRQ_REG(ATC2609A_IRQ_OC, 0, ATC2609A_INTS_MSK_OC), REGMAP_IRQ_REG(ATC2609A_IRQ_OT, 0, ATC2609A_INTS_MSK_OT), REGMAP_IRQ_REG(ATC2609A_IRQ_UV, 0, ATC2609A_INTS_MSK_UV), REGMAP_IRQ_REG(ATC2609A_IRQ_ALARM, 0, ATC2609A_INTS_MSK_ALARM), REGMAP_IRQ_REG(ATC2609A_IRQ_ONOFF, 0, ATC2609A_INTS_MSK_ONOFF), REGMAP_IRQ_REG(ATC2609A_IRQ_WKUP, 0, ATC2609A_INTS_MSK_WKUP), REGMAP_IRQ_REG(ATC2609A_IRQ_IR, 0, ATC2609A_INTS_MSK_IR), REGMAP_IRQ_REG(ATC2609A_IRQ_REMCON, 0, ATC2609A_INTS_MSK_REMCON), REGMAP_IRQ_REG(ATC2609A_IRQ_POWER_IN, 0, ATC2609A_INTS_MSK_POWERIN), }; static const struct regmap_irq_chip atc2603c_regmap_irq_chip = { .name = "atc2603c", .irqs = atc2603c_regmap_irqs, .num_irqs = ARRAY_SIZE(atc2603c_regmap_irqs), .num_regs = 1, .status_base = ATC2603C_INTS_PD, .unmask_base = ATC2603C_INTS_MSK, }; static const struct regmap_irq_chip atc2609a_regmap_irq_chip = { .name = "atc2609a", .irqs = atc2609a_regmap_irqs, .num_irqs = ARRAY_SIZE(atc2609a_regmap_irqs), .num_regs = 1, .status_base = ATC2609A_INTS_PD, .unmask_base = ATC2609A_INTS_MSK, }; static const struct resource atc2603c_onkey_resources[] = { DEFINE_RES_IRQ(ATC2603C_IRQ_ONOFF), }; static const struct resource atc2609a_onkey_resources[] = { DEFINE_RES_IRQ(ATC2609A_IRQ_ONOFF), }; static const struct mfd_cell atc2603c_mfd_cells[] = { { .name = "atc260x-regulator" }, { .name = "atc260x-pwrc" }, { .name = "atc260x-onkey", .num_resources = ARRAY_SIZE(atc2603c_onkey_resources), .resources = atc2603c_onkey_resources, }, }; static const struct mfd_cell atc2609a_mfd_cells[] = { { .name = "atc260x-regulator" }, { .name = "atc260x-pwrc" }, { .name = "atc260x-onkey", .num_resources = ARRAY_SIZE(atc2609a_onkey_resources), .resources = atc2609a_onkey_resources, }, }; static const struct atc260x_init_regs atc2603c_init_regs = { .cmu_devrst = ATC2603C_CMU_DEVRST, .cmu_devrst_ints = ATC2603C_CMU_DEVRST_INTS, .ints_msk = ATC2603C_INTS_MSK, .pad_en = ATC2603C_PAD_EN, .pad_en_extirq = ATC2603C_PAD_EN_EXTIRQ, }; static const struct atc260x_init_regs atc2609a_init_regs = { .cmu_devrst = ATC2609A_CMU_DEVRST, .cmu_devrst_ints = ATC2609A_CMU_DEVRST_INTS, .ints_msk = ATC2609A_INTS_MSK, .pad_en = ATC2609A_PAD_EN, .pad_en_extirq = ATC2609A_PAD_EN_EXTIRQ, }; static void atc260x_cmu_reset(struct atc260x *atc260x) { const struct atc260x_init_regs *regs = atc260x->init_regs; /* Assert reset */ regmap_update_bits(atc260x->regmap, regs->cmu_devrst, regs->cmu_devrst_ints, ~regs->cmu_devrst_ints); /* De-assert reset */ regmap_update_bits(atc260x->regmap, regs->cmu_devrst, regs->cmu_devrst_ints, regs->cmu_devrst_ints); } static void atc260x_dev_init(struct atc260x *atc260x) { const struct atc260x_init_regs *regs = atc260x->init_regs; /* Initialize interrupt block */ atc260x_cmu_reset(atc260x); /* Disable all interrupt sources */ regmap_write(atc260x->regmap, regs->ints_msk, 0); /* Enable EXTIRQ pad */ regmap_update_bits(atc260x->regmap, regs->pad_en, regs->pad_en_extirq, regs->pad_en_extirq); } /** * atc260x_match_device(): Setup ATC260x variant related fields * * @atc260x: ATC260x device to setup (.dev field must be set) * @regmap_cfg: regmap config associated with this ATC260x device * * This lets the ATC260x core configure the MFD cells and register maps * for later use. */ int atc260x_match_device(struct atc260x *atc260x, struct regmap_config *regmap_cfg) { struct device *dev = atc260x->dev; const void *of_data; of_data = of_device_get_match_data(dev); if (!of_data) return -ENODEV; atc260x->ic_type = (unsigned long)of_data; switch (atc260x->ic_type) { case ATC2603C: *regmap_cfg = atc2603c_regmap_config; atc260x->regmap_irq_chip = &atc2603c_regmap_irq_chip; atc260x->cells = atc2603c_mfd_cells; atc260x->nr_cells = ARRAY_SIZE(atc2603c_mfd_cells); atc260x->type_name = "atc2603c"; atc260x->rev_reg = ATC2603C_CHIP_VER; atc260x->init_regs = &atc2603c_init_regs; break; case ATC2609A: *regmap_cfg = atc2609a_regmap_config; atc260x->regmap_irq_chip = &atc2609a_regmap_irq_chip; atc260x->cells = atc2609a_mfd_cells; atc260x->nr_cells = ARRAY_SIZE(atc2609a_mfd_cells); atc260x->type_name = "atc2609a"; atc260x->rev_reg = ATC2609A_CHIP_VER; atc260x->init_regs = &atc2609a_init_regs; break; default: dev_err(dev, "Unsupported ATC260x device type: %u\n", atc260x->ic_type); return -EINVAL; } atc260x->regmap_mutex = devm_kzalloc(dev, sizeof(*atc260x->regmap_mutex), GFP_KERNEL); if (!atc260x->regmap_mutex) return -ENOMEM; mutex_init(atc260x->regmap_mutex); regmap_cfg->lock = regmap_lock_mutex; regmap_cfg->unlock = regmap_unlock_mutex; regmap_cfg->lock_arg = atc260x->regmap_mutex; return 0; } EXPORT_SYMBOL_GPL(atc260x_match_device); /** * atc260x_device_probe(): Probe a configured ATC260x device * * @atc260x: ATC260x device to probe (must be configured) * * This function lets the ATC260x core register the ATC260x MFD devices * and IRQCHIP. The ATC260x device passed in must be fully configured * with atc260x_match_device, its IRQ set, and regmap created. */ int atc260x_device_probe(struct atc260x *atc260x) { struct device *dev = atc260x->dev; unsigned int chip_rev; int ret; if (!atc260x->irq) { dev_err(dev, "No interrupt support\n"); return -EINVAL; } /* Initialize the hardware */ atc260x_dev_init(atc260x); ret = regmap_read(atc260x->regmap, atc260x->rev_reg, &chip_rev); if (ret) { dev_err(dev, "Failed to get chip revision\n"); return ret; } if (chip_rev > ATC260X_CHIP_REV_MAX) { dev_err(dev, "Unknown chip revision: %u\n", chip_rev); return -EINVAL; } atc260x->ic_ver = __ffs(chip_rev + 1U); dev_info(dev, "Detected chip type %s rev.%c\n", atc260x->type_name, 'A' + atc260x->ic_ver); ret = devm_regmap_add_irq_chip(dev, atc260x->regmap, atc260x->irq, IRQF_ONESHOT, -1, atc260x->regmap_irq_chip, &atc260x->irq_data); if (ret) { dev_err(dev, "Failed to add IRQ chip: %d\n", ret); return ret; } ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, atc260x->cells, atc260x->nr_cells, NULL, 0, regmap_irq_get_domain(atc260x->irq_data)); if (ret) { dev_err(dev, "Failed to add child devices: %d\n", ret); regmap_del_irq_chip(atc260x->irq, atc260x->irq_data); } return ret; } EXPORT_SYMBOL_GPL(atc260x_device_probe); MODULE_DESCRIPTION("ATC260x PMICs Core support"); MODULE_AUTHOR("Manivannan Sadhasivam "); MODULE_AUTHOR("Cristian Ciocaltea "); MODULE_LICENSE("GPL");