![Aaron Lu](/assets/img/avatar_default.png)
The same virtual GPIO strategy is also used for the AXP288 PMIC in that various control methods that are used to do power rail handling and sensor reading/setting will touch GPIO fields defined under the PMIC device. The GPIO fileds are only defined by the ACPI code while the actual hardware doesn't really have a GPIO controller, but to make those control method execution succeed, we have to install a GPIO handler for the PMIC device handle. Since we do not need the virtual GPIO strategy, we can simply do nothing in that handler. Signed-off-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
269 lines
5.3 KiB
C
269 lines
5.3 KiB
C
/*
|
|
* intel_pmic_xpower.c - XPower AXP288 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/axp20x.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/iio/consumer.h>
|
|
#include "intel_pmic.h"
|
|
|
|
#define XPOWER_GPADC_LOW 0x5b
|
|
|
|
static struct pmic_table power_table[] = {
|
|
{
|
|
.address = 0x00,
|
|
.reg = 0x13,
|
|
.bit = 0x05,
|
|
},
|
|
{
|
|
.address = 0x04,
|
|
.reg = 0x13,
|
|
.bit = 0x06,
|
|
},
|
|
{
|
|
.address = 0x08,
|
|
.reg = 0x13,
|
|
.bit = 0x07,
|
|
},
|
|
{
|
|
.address = 0x0c,
|
|
.reg = 0x12,
|
|
.bit = 0x03,
|
|
},
|
|
{
|
|
.address = 0x10,
|
|
.reg = 0x12,
|
|
.bit = 0x04,
|
|
},
|
|
{
|
|
.address = 0x14,
|
|
.reg = 0x12,
|
|
.bit = 0x05,
|
|
},
|
|
{
|
|
.address = 0x18,
|
|
.reg = 0x12,
|
|
.bit = 0x06,
|
|
},
|
|
{
|
|
.address = 0x1c,
|
|
.reg = 0x12,
|
|
.bit = 0x00,
|
|
},
|
|
{
|
|
.address = 0x20,
|
|
.reg = 0x12,
|
|
.bit = 0x01,
|
|
},
|
|
{
|
|
.address = 0x24,
|
|
.reg = 0x12,
|
|
.bit = 0x02,
|
|
},
|
|
{
|
|
.address = 0x28,
|
|
.reg = 0x13,
|
|
.bit = 0x02,
|
|
},
|
|
{
|
|
.address = 0x2c,
|
|
.reg = 0x13,
|
|
.bit = 0x03,
|
|
},
|
|
{
|
|
.address = 0x30,
|
|
.reg = 0x13,
|
|
.bit = 0x04,
|
|
},
|
|
{
|
|
.address = 0x38,
|
|
.reg = 0x10,
|
|
.bit = 0x03,
|
|
},
|
|
{
|
|
.address = 0x3c,
|
|
.reg = 0x10,
|
|
.bit = 0x06,
|
|
},
|
|
{
|
|
.address = 0x40,
|
|
.reg = 0x10,
|
|
.bit = 0x05,
|
|
},
|
|
{
|
|
.address = 0x44,
|
|
.reg = 0x10,
|
|
.bit = 0x04,
|
|
},
|
|
{
|
|
.address = 0x48,
|
|
.reg = 0x10,
|
|
.bit = 0x01,
|
|
},
|
|
{
|
|
.address = 0x4c,
|
|
.reg = 0x10,
|
|
.bit = 0x00
|
|
},
|
|
};
|
|
|
|
/* TMP0 - TMP5 are the same, all from GPADC */
|
|
static struct pmic_table thermal_table[] = {
|
|
{
|
|
.address = 0x00,
|
|
.reg = XPOWER_GPADC_LOW
|
|
},
|
|
{
|
|
.address = 0x0c,
|
|
.reg = XPOWER_GPADC_LOW
|
|
},
|
|
{
|
|
.address = 0x18,
|
|
.reg = XPOWER_GPADC_LOW
|
|
},
|
|
{
|
|
.address = 0x24,
|
|
.reg = XPOWER_GPADC_LOW
|
|
},
|
|
{
|
|
.address = 0x30,
|
|
.reg = XPOWER_GPADC_LOW
|
|
},
|
|
{
|
|
.address = 0x3c,
|
|
.reg = XPOWER_GPADC_LOW
|
|
},
|
|
};
|
|
|
|
static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg,
|
|
int bit, u64 *value)
|
|
{
|
|
int data;
|
|
|
|
if (regmap_read(regmap, reg, &data))
|
|
return -EIO;
|
|
|
|
*value = (data & BIT(bit)) ? 1 : 0;
|
|
return 0;
|
|
}
|
|
|
|
static int intel_xpower_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 |= BIT(bit);
|
|
else
|
|
data &= ~BIT(bit);
|
|
|
|
if (regmap_write(regmap, reg, data))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC
|
|
*
|
|
* @regmap: regmap of the PMIC device
|
|
* @reg: register to get the reading
|
|
*
|
|
* We could get the sensor value by manipulating the HW regs here, but since
|
|
* the axp288 IIO driver may also access the same regs at the same time, the
|
|
* APIs provided by IIO subsystem are used here instead to avoid problems. As
|
|
* a result, the two passed in params are of no actual use.
|
|
*
|
|
* Return a positive value on success, errno on failure.
|
|
*/
|
|
static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg)
|
|
{
|
|
struct iio_channel *gpadc_chan;
|
|
int ret, val;
|
|
|
|
gpadc_chan = iio_channel_get(NULL, "axp288-system-temp");
|
|
if (IS_ERR_OR_NULL(gpadc_chan))
|
|
return -EACCES;
|
|
|
|
ret = iio_read_channel_raw(gpadc_chan, &val);
|
|
if (ret < 0)
|
|
val = ret;
|
|
|
|
iio_channel_release(gpadc_chan);
|
|
return val;
|
|
}
|
|
|
|
static struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = {
|
|
.get_power = intel_xpower_pmic_get_power,
|
|
.update_power = intel_xpower_pmic_update_power,
|
|
.get_raw_temp = intel_xpower_pmic_get_raw_temp,
|
|
.power_table = power_table,
|
|
.power_table_count = ARRAY_SIZE(power_table),
|
|
.thermal_table = thermal_table,
|
|
.thermal_table_count = ARRAY_SIZE(thermal_table),
|
|
};
|
|
|
|
static acpi_status intel_xpower_pmic_gpio_handler(u32 function,
|
|
acpi_physical_address address, u32 bit_width, u64 *value,
|
|
void *handler_context, void *region_context)
|
|
{
|
|
return AE_OK;
|
|
}
|
|
|
|
static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *parent = pdev->dev.parent;
|
|
struct axp20x_dev *axp20x = dev_get_drvdata(parent);
|
|
acpi_status status;
|
|
int result;
|
|
|
|
status = acpi_install_address_space_handler(ACPI_HANDLE(parent),
|
|
ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler,
|
|
NULL, NULL);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
result = intel_pmic_install_opregion_handler(&pdev->dev,
|
|
ACPI_HANDLE(parent), axp20x->regmap,
|
|
&intel_xpower_pmic_opregion_data);
|
|
if (result)
|
|
acpi_remove_address_space_handler(ACPI_HANDLE(parent),
|
|
ACPI_ADR_SPACE_GPIO,
|
|
intel_xpower_pmic_gpio_handler);
|
|
|
|
return result;
|
|
}
|
|
|
|
static struct platform_driver intel_xpower_pmic_opregion_driver = {
|
|
.probe = intel_xpower_pmic_opregion_probe,
|
|
.driver = {
|
|
.name = "axp288_pmic_acpi",
|
|
},
|
|
};
|
|
|
|
static int __init intel_xpower_pmic_opregion_driver_init(void)
|
|
{
|
|
return platform_driver_register(&intel_xpower_pmic_opregion_driver);
|
|
}
|
|
module_init(intel_xpower_pmic_opregion_driver_init);
|
|
|
|
MODULE_DESCRIPTION("XPower AXP288 ACPI operation region driver");
|
|
MODULE_LICENSE("GPL");
|