--- /dev/null
+/*
+ * 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");
Code Review / kvmfornfv.git / blobdiff