2 * intel_pmic_crc.c - Intel CrystalCove PMIC operation region driver
4 * Copyright (C) 2014 Intel Corporation. All rights reserved.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #include <linux/init.h>
17 #include <linux/acpi.h>
18 #include <linux/mfd/intel_soc_pmic.h>
19 #include <linux/regmap.h>
20 #include <linux/platform_device.h>
21 #include "intel_pmic.h"
23 #define PWR_SOURCE_SELECT BIT(1)
25 #define PMIC_A0LOCK_REG 0xc5
27 static struct pmic_table power_table[] = {
40 static struct pmic_table thermal_table[] = {
91 static int intel_crc_pmic_get_power(struct regmap *regmap, int reg,
96 if (regmap_read(regmap, reg, &data))
99 *value = (data & PWR_SOURCE_SELECT) && (data & BIT(bit)) ? 1 : 0;
103 static int intel_crc_pmic_update_power(struct regmap *regmap, int reg,
108 if (regmap_read(regmap, reg, &data))
112 data |= PWR_SOURCE_SELECT | BIT(bit);
115 data |= PWR_SOURCE_SELECT;
118 if (regmap_write(regmap, reg, data))
123 static int intel_crc_pmic_get_raw_temp(struct regmap *regmap, int reg)
128 * Raw temperature value is 10bits: 8bits in reg
129 * and 2bits in reg-1: bit0,1
131 if (regmap_read(regmap, reg, &temp_l) ||
132 regmap_read(regmap, reg - 1, &temp_h))
135 return temp_l | (temp_h & 0x3) << 8;
138 static int intel_crc_pmic_update_aux(struct regmap *regmap, int reg, int raw)
140 return regmap_write(regmap, reg, raw) ||
141 regmap_update_bits(regmap, reg - 1, 0x3, raw >> 8) ? -EIO : 0;
144 static int intel_crc_pmic_get_policy(struct regmap *regmap,
145 int reg, int bit, u64 *value)
149 if (regmap_read(regmap, reg, &pen))
155 static int intel_crc_pmic_update_policy(struct regmap *regmap,
156 int reg, int bit, int enable)
160 /* Update to policy enable bit requires unlocking a0lock */
161 if (regmap_read(regmap, PMIC_A0LOCK_REG, &alert0))
164 if (regmap_update_bits(regmap, PMIC_A0LOCK_REG, 0x01, 0))
167 if (regmap_update_bits(regmap, reg, 0x80, enable << 7))
171 if (regmap_write(regmap, PMIC_A0LOCK_REG, alert0))
177 static struct intel_pmic_opregion_data intel_crc_pmic_opregion_data = {
178 .get_power = intel_crc_pmic_get_power,
179 .update_power = intel_crc_pmic_update_power,
180 .get_raw_temp = intel_crc_pmic_get_raw_temp,
181 .update_aux = intel_crc_pmic_update_aux,
182 .get_policy = intel_crc_pmic_get_policy,
183 .update_policy = intel_crc_pmic_update_policy,
184 .power_table = power_table,
185 .power_table_count= ARRAY_SIZE(power_table),
186 .thermal_table = thermal_table,
187 .thermal_table_count = ARRAY_SIZE(thermal_table),
190 static int intel_crc_pmic_opregion_probe(struct platform_device *pdev)
192 struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
193 return intel_pmic_install_opregion_handler(&pdev->dev,
194 ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
195 &intel_crc_pmic_opregion_data);
198 static struct platform_driver intel_crc_pmic_opregion_driver = {
199 .probe = intel_crc_pmic_opregion_probe,
201 .name = "crystal_cove_pmic",
204 builtin_platform_driver(intel_crc_pmic_opregion_driver);