diff options
Diffstat (limited to 'drivers/mfd/intel_soc_pmic_chtdc_ti.c')
| -rw-r--r-- | drivers/mfd/intel_soc_pmic_chtdc_ti.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/drivers/mfd/intel_soc_pmic_chtdc_ti.c b/drivers/mfd/intel_soc_pmic_chtdc_ti.c new file mode 100644 index 000000000000..861277c6580a --- /dev/null +++ b/drivers/mfd/intel_soc_pmic_chtdc_ti.c @@ -0,0 +1,184 @@ +/* + * Device access for Dollar Cove TI PMIC + * + * Copyright (c) 2014, Intel Corporation. + * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com> + * + * Cleanup and forward-ported + * Copyright (c) 2017 Takashi Iwai <tiwai@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/acpi.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/mfd/core.h> +#include <linux/mfd/intel_soc_pmic.h> +#include <linux/module.h> +#include <linux/regmap.h> + +#define CHTDC_TI_IRQLVL1 0x01 +#define CHTDC_TI_MASK_IRQLVL1 0x02 + +/* Level 1 IRQs */ +enum { + CHTDC_TI_PWRBTN = 0, /* power button */ + CHTDC_TI_DIETMPWARN, /* thermal */ + CHTDC_TI_ADCCMPL, /* ADC */ + /* No IRQ 3 */ + CHTDC_TI_VBATLOW = 4, /* battery */ + CHTDC_TI_VBUSDET, /* power source */ + /* No IRQ 6 */ + CHTDC_TI_CCEOCAL = 7, /* battery */ +}; + +static struct resource power_button_resources[] = { + DEFINE_RES_IRQ(CHTDC_TI_PWRBTN), +}; + +static struct resource thermal_resources[] = { + DEFINE_RES_IRQ(CHTDC_TI_DIETMPWARN), +}; + +static struct resource adc_resources[] = { + DEFINE_RES_IRQ(CHTDC_TI_ADCCMPL), +}; + +static struct resource pwrsrc_resources[] = { + DEFINE_RES_IRQ(CHTDC_TI_VBUSDET), +}; + +static struct resource battery_resources[] = { + DEFINE_RES_IRQ(CHTDC_TI_VBATLOW), + DEFINE_RES_IRQ(CHTDC_TI_CCEOCAL), +}; + +static struct mfd_cell chtdc_ti_dev[] = { + { + .name = "chtdc_ti_pwrbtn", + .num_resources = ARRAY_SIZE(power_button_resources), + .resources = power_button_resources, + }, { + .name = "chtdc_ti_adc", + .num_resources = ARRAY_SIZE(adc_resources), + .resources = adc_resources, + }, { + .name = "chtdc_ti_thermal", + .num_resources = ARRAY_SIZE(thermal_resources), + .resources = thermal_resources, + }, { + .name = "chtdc_ti_pwrsrc", + .num_resources = ARRAY_SIZE(pwrsrc_resources), + .resources = pwrsrc_resources, + }, { + .name = "chtdc_ti_battery", + .num_resources = ARRAY_SIZE(battery_resources), + .resources = battery_resources, + }, + { .name = "chtdc_ti_region", }, +}; + +static const struct regmap_config chtdc_ti_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 128, + .cache_type = REGCACHE_NONE, +}; + +static const struct regmap_irq chtdc_ti_irqs[] = { + REGMAP_IRQ_REG(CHTDC_TI_PWRBTN, 0, BIT(CHTDC_TI_PWRBTN)), + REGMAP_IRQ_REG(CHTDC_TI_DIETMPWARN, 0, BIT(CHTDC_TI_DIETMPWARN)), + REGMAP_IRQ_REG(CHTDC_TI_ADCCMPL, 0, BIT(CHTDC_TI_ADCCMPL)), + REGMAP_IRQ_REG(CHTDC_TI_VBATLOW, 0, BIT(CHTDC_TI_VBATLOW)), + REGMAP_IRQ_REG(CHTDC_TI_VBUSDET, 0, BIT(CHTDC_TI_VBUSDET)), + REGMAP_IRQ_REG(CHTDC_TI_CCEOCAL, 0, BIT(CHTDC_TI_CCEOCAL)), +}; + +static const struct regmap_irq_chip chtdc_ti_irq_chip = { + .name = KBUILD_MODNAME, + .irqs = chtdc_ti_irqs, + .num_irqs = ARRAY_SIZE(chtdc_ti_irqs), + .num_regs = 1, + .status_base = CHTDC_TI_IRQLVL1, + .mask_base = CHTDC_TI_MASK_IRQLVL1, + .ack_base = CHTDC_TI_IRQLVL1, +}; + +static int chtdc_ti_probe(struct i2c_client *i2c) +{ + struct device *dev = &i2c->dev; + struct intel_soc_pmic *pmic; + int ret; + + pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL); + if (!pmic) + return -ENOMEM; + + i2c_set_clientdata(i2c, pmic); + + pmic->regmap = devm_regmap_init_i2c(i2c, &chtdc_ti_regmap_config); + if (IS_ERR(pmic->regmap)) + return PTR_ERR(pmic->regmap); + pmic->irq = i2c->irq; + + ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq, + IRQF_ONESHOT, 0, + &chtdc_ti_irq_chip, + &pmic->irq_chip_data); + if (ret) + return ret; + + return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, chtdc_ti_dev, + ARRAY_SIZE(chtdc_ti_dev), NULL, 0, + regmap_irq_get_domain(pmic->irq_chip_data)); +} + +static void chtdc_ti_shutdown(struct i2c_client *i2c) +{ + struct intel_soc_pmic *pmic = i2c_get_clientdata(i2c); + + disable_irq(pmic->irq); +} + +static int __maybe_unused chtdc_ti_suspend(struct device *dev) +{ + struct intel_soc_pmic *pmic = dev_get_drvdata(dev); + + disable_irq(pmic->irq); + + return 0; +} + +static int __maybe_unused chtdc_ti_resume(struct device *dev) +{ + struct intel_soc_pmic *pmic = dev_get_drvdata(dev); + + enable_irq(pmic->irq); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(chtdc_ti_pm_ops, chtdc_ti_suspend, chtdc_ti_resume); + +static const struct acpi_device_id chtdc_ti_acpi_ids[] = { + { "INT33F5" }, + { }, +}; +MODULE_DEVICE_TABLE(acpi, chtdc_ti_acpi_ids); + +static struct i2c_driver chtdc_ti_i2c_driver = { + .driver = { + .name = "intel_soc_pmic_chtdc_ti", + .pm = &chtdc_ti_pm_ops, + .acpi_match_table = chtdc_ti_acpi_ids, + }, + .probe_new = chtdc_ti_probe, + .shutdown = chtdc_ti_shutdown, +}; +module_i2c_driver(chtdc_ti_i2c_driver); + +MODULE_DESCRIPTION("I2C driver for Intel SoC Dollar Cove TI PMIC"); +MODULE_LICENSE("GPL v2"); |