1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Dollar Cove TI PMIC operation region driver
  4 * Copyright (C) 2014 Intel Corporation. All rights reserved.
  5 *
  6 * Rewritten and cleaned up
  7 * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>
  8 */
  9
 10#include <linux/acpi.h>
 11#include <linux/init.h>
 12#include <linux/mfd/intel_soc_pmic.h>
 13#include <linux/platform_device.h>
 14#include "intel_pmic.h"
 15
 16/* registers stored in 16bit BE (high:low, total 10bit) */
 17#define CHTDC_TI_VBAT		0x54
 18#define CHTDC_TI_DIETEMP	0x56
 19#define CHTDC_TI_BPTHERM	0x58
 20#define CHTDC_TI_GPADC		0x5a
 21
 22static struct pmic_table chtdc_ti_power_table[] = {
 23	{ .address = 0x00, .reg = 0x41 }, /* LDO1 */
 24	{ .address = 0x04, .reg = 0x42 }, /* LDO2 */
 25	{ .address = 0x08, .reg = 0x43 }, /* LDO3 */
 26	{ .address = 0x0c, .reg = 0x45 }, /* LDO5 */
 27	{ .address = 0x10, .reg = 0x46 }, /* LDO6 */
 28	{ .address = 0x14, .reg = 0x47 }, /* LDO7 */
 29	{ .address = 0x18, .reg = 0x48 }, /* LDO8 */
 30	{ .address = 0x1c, .reg = 0x49 }, /* LDO9 */
 31	{ .address = 0x20, .reg = 0x4a }, /* LD10 */
 32	{ .address = 0x24, .reg = 0x4b }, /* LD11 */
 33	{ .address = 0x28, .reg = 0x4c }, /* LD12 */
 34	{ .address = 0x2c, .reg = 0x4d }, /* LD13 */
 35	{ .address = 0x30, .reg = 0x4e }, /* LD14 */
 36};
 37
 38static struct pmic_table chtdc_ti_thermal_table[] = {
 39	{
 40		.address = 0x00,
 41		.reg = CHTDC_TI_GPADC
 42	},
 43	{
 44		.address = 0x0c,
 45		.reg = CHTDC_TI_GPADC
 46	},
 47	/* TMP2 -> SYSTEMP */
 48	{
 49		.address = 0x18,
 50		.reg = CHTDC_TI_GPADC
 51	},
 52	/* TMP3 -> BPTHERM */
 53	{
 54		.address = 0x24,
 55		.reg = CHTDC_TI_BPTHERM
 56	},
 57	{
 58		.address = 0x30,
 59		.reg = CHTDC_TI_GPADC
 60	},
 61	/* TMP5 -> DIETEMP */
 62	{
 63		.address = 0x3c,
 64		.reg = CHTDC_TI_DIETEMP
 65	},
 66};
 67
 68static int chtdc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit,
 69				   u64 *value)
 70{
 71	int data;
 72
 73	if (regmap_read(regmap, reg, &data))
 74		return -EIO;
 75
 76	*value = data & 1;
 77	return 0;
 78}
 79
 80static int chtdc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit,
 81				      bool on)
 82{
 83	return regmap_update_bits(regmap, reg, 1, on);
 84}
 85
 86static int chtdc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)
 87{
 88	u8 buf[2];
 89
 90	if (regmap_bulk_read(regmap, reg, buf, 2))
 91		return -EIO;
 92
 93	/* stored in big-endian */
 94	return ((buf[0] & 0x03) << 8) | buf[1];
 95}
 96
 97static const struct intel_pmic_opregion_data chtdc_ti_pmic_opregion_data = {
 98	.get_power = chtdc_ti_pmic_get_power,
 99	.update_power = chtdc_ti_pmic_update_power,
100	.get_raw_temp = chtdc_ti_pmic_get_raw_temp,
101	.lpat_raw_to_temp = acpi_lpat_raw_to_temp,
102	.power_table = chtdc_ti_power_table,
103	.power_table_count = ARRAY_SIZE(chtdc_ti_power_table),
104	.thermal_table = chtdc_ti_thermal_table,
105	.thermal_table_count = ARRAY_SIZE(chtdc_ti_thermal_table),
106	.pmic_i2c_address = 0x5e,
107};
108
109static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)
110{
111	struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
112	int err;
113
114	err = intel_pmic_install_opregion_handler(&pdev->dev,
115			ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
116			&chtdc_ti_pmic_opregion_data);
117	if (err < 0)
118		return err;
119
120	/* Re-enumerate devices depending on PMIC */
121	acpi_dev_clear_dependencies(ACPI_COMPANION(pdev->dev.parent));
122	return 0;
123}
124
125static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {
126	{ .name = "chtdc_ti_region" },
127	{},
128};
129
130static struct platform_driver chtdc_ti_pmic_opregion_driver = {
131	.probe = chtdc_ti_pmic_opregion_probe,
132	.driver = {
133		.name = "cht_dollar_cove_ti_pmic",
134	},
135	.id_table = chtdc_ti_pmic_opregion_id_table,
136};
137builtin_platform_driver(chtdc_ti_pmic_opregion_driver);