intel_soc_pmic_chtdc_ti.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Device access for Dollar Cove TI PMIC
  4 *
  5 * Copyright (c) 2014, Intel Corporation.
  6 *   Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
  7 *
  8 * Cleanup and forward-ported
  9 *   Copyright (c) 2017 Takashi Iwai <tiwai@suse.de>
 10 */
 11
 12#include <linux/acpi.h>
 13#include <linux/interrupt.h>
 14#include <linux/i2c.h>
 15#include <linux/mfd/core.h>
 16#include <linux/mfd/intel_soc_pmic.h>
 17#include <linux/module.h>
 18#include <linux/regmap.h>
 19
 20#define CHTDC_TI_IRQLVL1	0x01
 21#define CHTDC_TI_MASK_IRQLVL1	0x02
 22
 23/* Level 1 IRQs */
 24enum {
 25	CHTDC_TI_PWRBTN = 0,	/* power button */
 26	CHTDC_TI_DIETMPWARN,	/* thermal */
 27	CHTDC_TI_ADCCMPL,	/* ADC */
 28	/* No IRQ 3 */
 29	CHTDC_TI_VBATLOW = 4,	/* battery */
 30	CHTDC_TI_VBUSDET,	/* power source */
 31	/* No IRQ 6 */
 32	CHTDC_TI_CCEOCAL = 7,	/* battery */
 33};
 34
 35static const struct resource power_button_resources[] = {
 36	DEFINE_RES_IRQ(CHTDC_TI_PWRBTN),
 37};
 38
 39static const struct resource thermal_resources[] = {
 40	DEFINE_RES_IRQ(CHTDC_TI_DIETMPWARN),
 41};
 42
 43static const struct resource adc_resources[] = {
 44	DEFINE_RES_IRQ(CHTDC_TI_ADCCMPL),
 45};
 46
 47static const struct resource pwrsrc_resources[] = {
 48	DEFINE_RES_IRQ(CHTDC_TI_VBUSDET),
 49};
 50
 51static const struct resource battery_resources[] = {
 52	DEFINE_RES_IRQ(CHTDC_TI_VBATLOW),
 53	DEFINE_RES_IRQ(CHTDC_TI_CCEOCAL),
 54};
 55
 56static struct mfd_cell chtdc_ti_dev[] = {
 57	{
 58		.name = "chtdc_ti_pwrbtn",
 59		.num_resources = ARRAY_SIZE(power_button_resources),
 60		.resources = power_button_resources,
 61	}, {
 62		.name = "chtdc_ti_adc",
 63		.num_resources = ARRAY_SIZE(adc_resources),
 64		.resources = adc_resources,
 65	}, {
 66		.name = "chtdc_ti_thermal",
 67		.num_resources = ARRAY_SIZE(thermal_resources),
 68		.resources = thermal_resources,
 69	}, {
 70		.name = "chtdc_ti_pwrsrc",
 71		.num_resources = ARRAY_SIZE(pwrsrc_resources),
 72		.resources = pwrsrc_resources,
 73	}, {
 74		.name = "chtdc_ti_battery",
 75		.num_resources = ARRAY_SIZE(battery_resources),
 76		.resources = battery_resources,
 77	},
 78	{	.name = "chtdc_ti_region", },
 79};
 80
 81static const struct regmap_config chtdc_ti_regmap_config = {
 82	.reg_bits = 8,
 83	.val_bits = 8,
 84	.max_register = 0xff,
 85	/* The hardware does not support reading multiple registers at once */
 86	.use_single_read = true,
 87};
 88
 89static const struct regmap_irq chtdc_ti_irqs[] = {
 90	REGMAP_IRQ_REG(CHTDC_TI_PWRBTN, 0, BIT(CHTDC_TI_PWRBTN)),
 91	REGMAP_IRQ_REG(CHTDC_TI_DIETMPWARN, 0, BIT(CHTDC_TI_DIETMPWARN)),
 92	REGMAP_IRQ_REG(CHTDC_TI_ADCCMPL, 0, BIT(CHTDC_TI_ADCCMPL)),
 93	REGMAP_IRQ_REG(CHTDC_TI_VBATLOW, 0, BIT(CHTDC_TI_VBATLOW)),
 94	REGMAP_IRQ_REG(CHTDC_TI_VBUSDET, 0, BIT(CHTDC_TI_VBUSDET)),
 95	REGMAP_IRQ_REG(CHTDC_TI_CCEOCAL, 0, BIT(CHTDC_TI_CCEOCAL)),
 96};
 97
 98static const struct regmap_irq_chip chtdc_ti_irq_chip = {
 99	.name = KBUILD_MODNAME,
100	.irqs = chtdc_ti_irqs,
101	.num_irqs = ARRAY_SIZE(chtdc_ti_irqs),
102	.num_regs = 1,
103	.status_base = CHTDC_TI_IRQLVL1,
104	.mask_base = CHTDC_TI_MASK_IRQLVL1,
105	.ack_base = CHTDC_TI_IRQLVL1,
106};
107
108static int chtdc_ti_probe(struct i2c_client *i2c)
109{
110	struct device *dev = &i2c->dev;
111	struct intel_soc_pmic *pmic;
112	int ret;
113
114	pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
115	if (!pmic)
116		return -ENOMEM;
117
118	i2c_set_clientdata(i2c, pmic);
119
120	pmic->regmap = devm_regmap_init_i2c(i2c, &chtdc_ti_regmap_config);
121	if (IS_ERR(pmic->regmap))
122		return PTR_ERR(pmic->regmap);
123	pmic->irq = i2c->irq;
124
125	ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
126				       IRQF_ONESHOT, 0,
127				       &chtdc_ti_irq_chip,
128				       &pmic->irq_chip_data);
129	if (ret)
130		return ret;
131
132	return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, chtdc_ti_dev,
133				    ARRAY_SIZE(chtdc_ti_dev), NULL, 0,
134				    regmap_irq_get_domain(pmic->irq_chip_data));
135}
136
137static void chtdc_ti_shutdown(struct i2c_client *i2c)
138{
139	struct intel_soc_pmic *pmic = i2c_get_clientdata(i2c);
140
141	disable_irq(pmic->irq);
142}
143
144static int chtdc_ti_suspend(struct device *dev)
145{
146	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
147
148	disable_irq(pmic->irq);
149
150	return 0;
151}
152
153static int chtdc_ti_resume(struct device *dev)
154{
155	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
156
157	enable_irq(pmic->irq);
158
159	return 0;
160}
161
162static DEFINE_SIMPLE_DEV_PM_OPS(chtdc_ti_pm_ops, chtdc_ti_suspend, chtdc_ti_resume);
163
164static const struct acpi_device_id chtdc_ti_acpi_ids[] = {
165	{ "INT33F5" },
166	{ },
167};
168MODULE_DEVICE_TABLE(acpi, chtdc_ti_acpi_ids);
169
170static struct i2c_driver chtdc_ti_i2c_driver = {
171	.driver = {
172		.name = "intel_soc_pmic_chtdc_ti",
173		.pm = pm_sleep_ptr(&chtdc_ti_pm_ops),
174		.acpi_match_table = chtdc_ti_acpi_ids,
175	},
176	.probe = chtdc_ti_probe,
177	.shutdown = chtdc_ti_shutdown,
178};
179module_i2c_driver(chtdc_ti_i2c_driver);
180
181MODULE_DESCRIPTION("I2C driver for Intel SoC Dollar Cove TI PMIC");
182MODULE_LICENSE("GPL v2");