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// SPDX-License-Identifier: GPL-2.0
/*
* Device access for Crystal Cove PMIC
*
* Copyright (C) 2012-2014, 2022 Intel Corporation. All rights reserved.
*
* Author: Yang, Bin <bin.yang@intel.com>
* Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
*/
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mfd/core.h>
#include <linux/mfd/intel_soc_pmic.h>
#include <linux/platform_data/x86/soc.h>
#include <linux/pwm.h>
#include <linux/regmap.h>
#define CRYSTAL_COVE_MAX_REGISTER 0xC6
#define CRYSTAL_COVE_REG_IRQLVL1 0x02
#define CRYSTAL_COVE_REG_MIRQLVL1 0x0E
#define CRYSTAL_COVE_IRQ_PWRSRC 0
#define CRYSTAL_COVE_IRQ_THRM 1
#define CRYSTAL_COVE_IRQ_BCU 2
#define CRYSTAL_COVE_IRQ_ADC 3
#define CRYSTAL_COVE_IRQ_CHGR 4
#define CRYSTAL_COVE_IRQ_GPIO 5
#define CRYSTAL_COVE_IRQ_VHDMIOCP 6
static const struct resource pwrsrc_resources[] = {
DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_PWRSRC, "PWRSRC"),
};
static const struct resource thermal_resources[] = {
DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_THRM, "THERMAL"),
};
static const struct resource bcu_resources[] = {
DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_BCU, "BCU"),
};
static const struct resource adc_resources[] = {
DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_ADC, "ADC"),
};
static const struct resource charger_resources[] = {
DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_CHGR, "CHGR"),
};
static const struct resource gpio_resources[] = {
DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_GPIO, "GPIO"),
};
static struct mfd_cell crystal_cove_byt_dev[] = {
{
.name = "crystal_cove_pwrsrc",
.num_resources = ARRAY_SIZE(pwrsrc_resources),
.resources = pwrsrc_resources,
},
{
.name = "crystal_cove_thermal",
.num_resources = ARRAY_SIZE(thermal_resources),
.resources = thermal_resources,
},
{
.name = "crystal_cove_bcu",
.num_resources = ARRAY_SIZE(bcu_resources),
.resources = bcu_resources,
},
{
.name = "crystal_cove_adc",
.num_resources = ARRAY_SIZE(adc_resources),
.resources = adc_resources,
},
{
.name = "crystal_cove_charger",
.num_resources = ARRAY_SIZE(charger_resources),
.resources = charger_resources,
},
{
.name = "crystal_cove_gpio",
.num_resources = ARRAY_SIZE(gpio_resources),
.resources = gpio_resources,
},
{
.name = "byt_crystal_cove_pmic",
},
{
.name = "crystal_cove_pwm",
},
};
static struct mfd_cell crystal_cove_cht_dev[] = {
{
.name = "crystal_cove_gpio",
.num_resources = ARRAY_SIZE(gpio_resources),
.resources = gpio_resources,
},
{
.name = "cht_crystal_cove_pmic",
},
{
.name = "crystal_cove_pwm",
},
};
static const struct regmap_config crystal_cove_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = CRYSTAL_COVE_MAX_REGISTER,
.cache_type = REGCACHE_NONE,
};
static const struct regmap_irq crystal_cove_irqs[] = {
REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_PWRSRC, 0, BIT(CRYSTAL_COVE_IRQ_PWRSRC)),
REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_THRM, 0, BIT(CRYSTAL_COVE_IRQ_THRM)),
REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_BCU, 0, BIT(CRYSTAL_COVE_IRQ_BCU)),
REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_ADC, 0, BIT(CRYSTAL_COVE_IRQ_ADC)),
REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_CHGR, 0, BIT(CRYSTAL_COVE_IRQ_CHGR)),
REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_GPIO, 0, BIT(CRYSTAL_COVE_IRQ_GPIO)),
REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_VHDMIOCP, 0, BIT(CRYSTAL_COVE_IRQ_VHDMIOCP)),
};
static const struct regmap_irq_chip crystal_cove_irq_chip = {
.name = "Crystal Cove",
.irqs = crystal_cove_irqs,
.num_irqs = ARRAY_SIZE(crystal_cove_irqs),
.num_regs = 1,
.status_base = CRYSTAL_COVE_REG_IRQLVL1,
.mask_base = CRYSTAL_COVE_REG_MIRQLVL1,
};
/* PWM consumed by the Intel GFX */
static struct pwm_lookup crc_pwm_lookup[] = {
PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_pmic_backlight", 0, PWM_POLARITY_NORMAL),
};
struct crystal_cove_config {
unsigned long irq_flags;
struct mfd_cell *cell_dev;
int n_cell_devs;
const struct regmap_config *regmap_config;
const struct regmap_irq_chip *irq_chip;
};
static const struct crystal_cove_config crystal_cove_config_byt_crc = {
.irq_flags = IRQF_TRIGGER_RISING,
.cell_dev = crystal_cove_byt_dev,
.n_cell_devs = ARRAY_SIZE(crystal_cove_byt_dev),
.regmap_config = &crystal_cove_regmap_config,
.irq_chip = &crystal_cove_irq_chip,
};
static const struct crystal_cove_config crystal_cove_config_cht_crc = {
.irq_flags = IRQF_TRIGGER_RISING,
.cell_dev = crystal_cove_cht_dev,
.n_cell_devs = ARRAY_SIZE(crystal_cove_cht_dev),
.regmap_config = &crystal_cove_regmap_config,
.irq_chip = &crystal_cove_irq_chip,
};
static int crystal_cove_i2c_probe(struct i2c_client *i2c)
{
const struct crystal_cove_config *config;
struct device *dev = &i2c->dev;
struct intel_soc_pmic *pmic;
int ret;
if (soc_intel_is_byt())
config = &crystal_cove_config_byt_crc;
else
config = &crystal_cove_config_cht_crc;
pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;
i2c_set_clientdata(i2c, pmic);
pmic->regmap = devm_regmap_init_i2c(i2c, config->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,
config->irq_flags | IRQF_ONESHOT,
0, config->irq_chip, &pmic->irq_chip_data);
if (ret)
return ret;
ret = enable_irq_wake(pmic->irq);
if (ret)
dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);
/* Add lookup table for crc-pwm */
pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
/* To distuingish this domain from the GPIO/charger's irqchip domains */
irq_domain_update_bus_token(regmap_irq_get_domain(pmic->irq_chip_data),
DOMAIN_BUS_NEXUS);
ret = mfd_add_devices(dev, PLATFORM_DEVID_NONE, config->cell_dev,
config->n_cell_devs, NULL, 0,
regmap_irq_get_domain(pmic->irq_chip_data));
if (ret)
pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
return ret;
}
static void crystal_cove_i2c_remove(struct i2c_client *i2c)
{
/* remove crc-pwm lookup table */
pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
mfd_remove_devices(&i2c->dev);
}
static void crystal_cove_shutdown(struct i2c_client *i2c)
{
struct intel_soc_pmic *pmic = i2c_get_clientdata(i2c);
disable_irq(pmic->irq);
return;
}
static int crystal_cove_suspend(struct device *dev)
{
struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
disable_irq(pmic->irq);
return 0;
}
static int crystal_cove_resume(struct device *dev)
{
struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
enable_irq(pmic->irq);
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(crystal_cove_pm_ops, crystal_cove_suspend, crystal_cove_resume);
static const struct acpi_device_id crystal_cove_acpi_match[] = {
{ "INT33FD" },
{ },
};
MODULE_DEVICE_TABLE(acpi, crystal_cove_acpi_match);
static struct i2c_driver crystal_cove_i2c_driver = {
.driver = {
.name = "crystal_cove_i2c",
.pm = pm_sleep_ptr(&crystal_cove_pm_ops),
.acpi_match_table = crystal_cove_acpi_match,
},
.probe = crystal_cove_i2c_probe,
.remove = crystal_cove_i2c_remove,
.shutdown = crystal_cove_shutdown,
};
module_i2c_driver(crystal_cove_i2c_driver);
MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC");
MODULE_AUTHOR("Yang, Bin <bin.yang@intel.com>");
MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>");
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