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