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/*
* intel_pmic_crc.c - Intel CrystalCove PMIC operation region driver
*
* Copyright (C) 2014 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/mfd/intel_soc_pmic.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include "intel_pmic.h"
#define PWR_SOURCE_SELECT BIT(1)
#define PMIC_A0LOCK_REG 0xc5
static struct pmic_table power_table[] = {
{
.address = 0x24,
.reg = 0x66,
.bit = 0x00,
},
{
.address = 0x48,
.reg = 0x5d,
.bit = 0x00,
},
};
static struct pmic_table thermal_table[] = {
{
.address = 0x00,
.reg = 0x75
},
{
.address = 0x04,
.reg = 0x95
},
{
.address = 0x08,
.reg = 0x97
},
{
.address = 0x0c,
.reg = 0x77
},
{
.address = 0x10,
.reg = 0x9a
},
{
.address = 0x14,
.reg = 0x9c
},
{
.address = 0x18,
.reg = 0x79
},
{
.address = 0x1c,
.reg = 0x9f
},
{
.address = 0x20,
.reg = 0xa1
},
{
.address = 0x48,
.reg = 0x94
},
{
.address = 0x4c,
.reg = 0x99
},
{
.address = 0x50,
.reg = 0x9e
},
};
static int intel_crc_pmic_get_power(struct regmap *regmap, int reg,
int bit, u64 *value)
{
int data;
if (regmap_read(regmap, reg, &data))
return -EIO;
*value = (data & PWR_SOURCE_SELECT) && (data & BIT(bit)) ? 1 : 0;
return 0;
}
static int intel_crc_pmic_update_power(struct regmap *regmap, int reg,
int bit, bool on)
{
int data;
if (regmap_read(regmap, reg, &data))
return -EIO;
if (on) {
data |= PWR_SOURCE_SELECT | BIT(bit);
} else {
data &= ~BIT(bit);
data |= PWR_SOURCE_SELECT;
}
if (regmap_write(regmap, reg, data))
return -EIO;
return 0;
}
static int intel_crc_pmic_get_raw_temp(struct regmap *regmap, int reg)
{
int temp_l, temp_h;
/*
* Raw temperature value is 10bits: 8bits in reg
* and 2bits in reg-1: bit0,1
*/
if (regmap_read(regmap, reg, &temp_l) ||
regmap_read(regmap, reg - 1, &temp_h))
return -EIO;
return temp_l | (temp_h & 0x3) << 8;
}
static int intel_crc_pmic_update_aux(struct regmap *regmap, int reg, int raw)
{
return regmap_write(regmap, reg, raw) ||
regmap_update_bits(regmap, reg - 1, 0x3, raw >> 8) ? -EIO : 0;
}
static int intel_crc_pmic_get_policy(struct regmap *regmap, int reg, u64 *value)
{
int pen;
if (regmap_read(regmap, reg, &pen))
return -EIO;
*value = pen >> 7;
return 0;
}
static int intel_crc_pmic_update_policy(struct regmap *regmap,
int reg, int enable)
{
int alert0;
/* Update to policy enable bit requires unlocking a0lock */
if (regmap_read(regmap, PMIC_A0LOCK_REG, &alert0))
return -EIO;
if (regmap_update_bits(regmap, PMIC_A0LOCK_REG, 0x01, 0))
return -EIO;
if (regmap_update_bits(regmap, reg, 0x80, enable << 7))
return -EIO;
/* restore alert0 */
if (regmap_write(regmap, PMIC_A0LOCK_REG, alert0))
return -EIO;
return 0;
}
static struct intel_pmic_opregion_data intel_crc_pmic_opregion_data = {
.get_power = intel_crc_pmic_get_power,
.update_power = intel_crc_pmic_update_power,
.get_raw_temp = intel_crc_pmic_get_raw_temp,
.update_aux = intel_crc_pmic_update_aux,
.get_policy = intel_crc_pmic_get_policy,
.update_policy = intel_crc_pmic_update_policy,
.power_table = power_table,
.power_table_count= ARRAY_SIZE(power_table),
.thermal_table = thermal_table,
.thermal_table_count = ARRAY_SIZE(thermal_table),
};
static int intel_crc_pmic_opregion_probe(struct platform_device *pdev)
{
struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
return intel_pmic_install_opregion_handler(&pdev->dev,
ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
&intel_crc_pmic_opregion_data);
}
static struct platform_driver intel_crc_pmic_opregion_driver = {
.probe = intel_crc_pmic_opregion_probe,
.driver = {
.name = "crystal_cove_pmic",
},
};
static int __init intel_crc_pmic_opregion_driver_init(void)
{
return platform_driver_register(&intel_crc_pmic_opregion_driver);
}
module_init(intel_crc_pmic_opregion_driver_init);
MODULE_DESCRIPTION("CrystalCove ACPI opration region driver");
MODULE_LICENSE("GPL");
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