1 files changed, 0 insertions, 560 deletions
diff --git a/drivers/platform/x86/intel_mid_thermal.c b/drivers/platform/x86/intel_mid_thermal.c
deleted file mode 100644
index f12f4e7bd971..000000000000
--- a/drivers/platform/x86/intel_mid_thermal.c
+++ /dev/null
@@ -1,560 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Intel MID platform thermal driver
- *
- * Copyright (C) 2011 Intel Corporation
- *
- * Author: Durgadoss R <durgadoss.r@intel.com>
- */
-
-#define pr_fmt(fmt) "intel_mid_thermal: " fmt
-
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/mfd/intel_msic.h>
-#include <linux/module.h>
-#include <linux/param.h>
-#include <linux/platform_device.h>
-#include <linux/pm.h>
-#include <linux/slab.h>
-#include <linux/thermal.h>
-
-/* Number of thermal sensors */
-#define MSIC_THERMAL_SENSORS	4
-
-/* ADC1 - thermal registers */
-#define MSIC_ADC_ENBL		0x10
-#define MSIC_ADC_START		0x08
-
-#define MSIC_ADCTHERM_ENBL	0x04
-#define MSIC_ADCRRDATA_ENBL	0x05
-#define MSIC_CHANL_MASK_VAL	0x0F
-
-#define MSIC_STOPBIT_MASK	16
-#define MSIC_ADCTHERM_MASK	4
-/* Number of ADC channels */
-#define ADC_CHANLS_MAX		15
-#define ADC_LOOP_MAX		(ADC_CHANLS_MAX - MSIC_THERMAL_SENSORS)
-
-/* ADC channel code values */
-#define SKIN_SENSOR0_CODE	0x08
-#define SKIN_SENSOR1_CODE	0x09
-#define SYS_SENSOR_CODE		0x0A
-#define MSIC_DIE_SENSOR_CODE	0x03
-
-#define SKIN_THERM_SENSOR0	0
-#define SKIN_THERM_SENSOR1	1
-#define SYS_THERM_SENSOR2	2
-#define MSIC_DIE_THERM_SENSOR3	3
-
-/* ADC code range */
-#define ADC_MAX			977
-#define ADC_MIN			162
-#define ADC_VAL0C		887
-#define ADC_VAL20C		720
-#define ADC_VAL40C		508
-#define ADC_VAL60C		315
-
-/* ADC base addresses */
-#define ADC_CHNL_START_ADDR	INTEL_MSIC_ADC1ADDR0	/* increments by 1 */
-#define ADC_DATA_START_ADDR	INTEL_MSIC_ADC1SNS0H	/* increments by 2 */
-
-/* MSIC die attributes */
-#define MSIC_DIE_ADC_MIN	488
-#define MSIC_DIE_ADC_MAX	1004
-
-/* This holds the address of the first free ADC channel,
- * among the 15 channels
- */
-static int channel_index;
-
-struct platform_info {
-	struct platform_device *pdev;
-	struct thermal_zone_device *tzd[MSIC_THERMAL_SENSORS];
-};
-
-struct thermal_device_info {
-	unsigned int chnl_addr;
-	int direct;
-	/* This holds the current temperature in millidegree celsius */
-	long curr_temp;
-};
-
-/**
- * to_msic_die_temp - converts adc_val to msic_die temperature
- * @adc_val: ADC value to be converted
- *
- * Can sleep
- */
-static int to_msic_die_temp(uint16_t adc_val)
-{
-	return (368 * (adc_val) / 1000) - 220;
-}
-
-/**
- * is_valid_adc - checks whether the adc code is within the defined range
- * @min: minimum value for the sensor
- * @max: maximum value for the sensor
- *
- * Can sleep
- */
-static int is_valid_adc(uint16_t adc_val, uint16_t min, uint16_t max)
-{
-	return (adc_val >= min) && (adc_val <= max);
-}
-
-/**
- * adc_to_temp - converts the ADC code to temperature in C
- * @direct: true if ths channel is direct index
- * @adc_val: the adc_val that needs to be converted
- * @tp: temperature return value
- *
- * Linear approximation is used to covert the skin adc value into temperature.
- * This technique is used to avoid very long look-up table to get
- * the appropriate temp value from ADC value.
- * The adc code vs sensor temp curve is split into five parts
- * to achieve very close approximate temp value with less than
- * 0.5C error
- */
-static int adc_to_temp(int direct, uint16_t adc_val, int *tp)
-{
-	int temp;
-
-	/* Direct conversion for die temperature */
-	if (direct) {
-		if (is_valid_adc(adc_val, MSIC_DIE_ADC_MIN, MSIC_DIE_ADC_MAX)) {
-			*tp = to_msic_die_temp(adc_val) * 1000;
-			return 0;
-		}
-		return -ERANGE;
-	}
-
-	if (!is_valid_adc(adc_val, ADC_MIN, ADC_MAX))
-		return -ERANGE;
-
-	/* Linear approximation for skin temperature */
-	if (adc_val > ADC_VAL0C)
-		temp = 177 - (adc_val/5);
-	else if ((adc_val <= ADC_VAL0C) && (adc_val > ADC_VAL20C))
-		temp = 111 - (adc_val/8);
-	else if ((adc_val <= ADC_VAL20C) && (adc_val > ADC_VAL40C))
-		temp = 92 - (adc_val/10);
-	else if ((adc_val <= ADC_VAL40C) && (adc_val > ADC_VAL60C))
-		temp = 91 - (adc_val/10);
-	else
-		temp = 112 - (adc_val/6);
-
-	/* Convert temperature in celsius to milli degree celsius */
-	*tp = temp * 1000;
-	return 0;
-}
-
-/**
- * mid_read_temp - read sensors for temperature
- * @temp: holds the current temperature for the sensor after reading
- *
- * reads the adc_code from the channel and converts it to real
- * temperature. The converted value is stored in temp.
- *
- * Can sleep
- */
-static int mid_read_temp(struct thermal_zone_device *tzd, int *temp)
-{
-	struct thermal_device_info *td_info = tzd->devdata;
-	uint16_t adc_val, addr;
-	uint8_t data = 0;
-	int ret;
-	int curr_temp;
-
-	addr = td_info->chnl_addr;
-
-	/* Enable the msic for conversion before reading */
-	ret = intel_msic_reg_write(INTEL_MSIC_ADC1CNTL3, MSIC_ADCRRDATA_ENBL);
-	if (ret)
-		return ret;
-
-	/* Re-toggle the RRDATARD bit (temporary workaround) */
-	ret = intel_msic_reg_write(INTEL_MSIC_ADC1CNTL3, MSIC_ADCTHERM_ENBL);
-	if (ret)
-		return ret;
-
-	/* Read the higher bits of data */
-	ret = intel_msic_reg_read(addr, &data);
-	if (ret)
-		return ret;
-
-	/* Shift bits to accommodate the lower two data bits */
-	adc_val = (data << 2);
-	addr++;
-
-	ret = intel_msic_reg_read(addr, &data);/* Read lower bits */
-	if (ret)
-		return ret;
-
-	/* Adding lower two bits to the higher bits */
-	data &= 03;
-	adc_val += data;
-
-	/* Convert ADC value to temperature */
-	ret = adc_to_temp(td_info->direct, adc_val, &curr_temp);
-	if (ret == 0)
-		*temp = td_info->curr_temp = curr_temp;
-	return ret;
-}
-
-/**
- * configure_adc - enables/disables the ADC for conversion
- * @val: zero: disables the ADC non-zero:enables the ADC
- *
- * Enable/Disable the ADC depending on the argument
- *
- * Can sleep
- */
-static int configure_adc(int val)
-{
-	int ret;
-	uint8_t data;
-
-	ret = intel_msic_reg_read(INTEL_MSIC_ADC1CNTL1, &data);
-	if (ret)
-		return ret;
-
-	if (val) {
-		/* Enable and start the ADC */
-		data |= (MSIC_ADC_ENBL | MSIC_ADC_START);
-	} else {
-		/* Just stop the ADC */
-		data &= (~MSIC_ADC_START);
-	}
-	return intel_msic_reg_write(INTEL_MSIC_ADC1CNTL1, data);
-}
-
-/**
- * set_up_therm_channel - enable thermal channel for conversion
- * @base_addr: index of free msic ADC channel
- *
- * Enable all the three channels for conversion
- *
- * Can sleep
- */
-static int set_up_therm_channel(u16 base_addr)
-{
-	int ret;
-
-	/* Enable all the sensor channels */
-	ret = intel_msic_reg_write(base_addr, SKIN_SENSOR0_CODE);
-	if (ret)
-		return ret;
-
-	ret = intel_msic_reg_write(base_addr + 1, SKIN_SENSOR1_CODE);
-	if (ret)
-		return ret;
-
-	ret = intel_msic_reg_write(base_addr + 2, SYS_SENSOR_CODE);
-	if (ret)
-		return ret;
-
-	/* Since this is the last channel, set the stop bit
-	 * to 1 by ORing the DIE_SENSOR_CODE with 0x10 */
-	ret = intel_msic_reg_write(base_addr + 3,
-			(MSIC_DIE_SENSOR_CODE | 0x10));
-	if (ret)
-		return ret;
-
-	/* Enable ADC and start it */
-	return configure_adc(1);
-}
-
-/**
- * reset_stopbit - sets the stop bit to 0 on the given channel
- * @addr: address of the channel
- *
- * Can sleep
- */
-static int reset_stopbit(uint16_t addr)
-{
-	int ret;
-	uint8_t data;
-	ret = intel_msic_reg_read(addr, &data);
-	if (ret)
-		return ret;
-	/* Set the stop bit to zero */
-	return intel_msic_reg_write(addr, (data & 0xEF));
-}
-
-/**
- * find_free_channel - finds an empty channel for conversion
- *
- * If the ADC is not enabled then start using 0th channel
- * itself. Otherwise find an empty channel by looking for a
- * channel in which the stopbit is set to 1. returns the index
- * of the first free channel if succeeds or an error code.
- *
- * Context: can sleep
- *
- * FIXME: Ultimately the channel allocator will move into the intel_scu_ipc
- * code.
- */
-static int find_free_channel(void)
-{
-	int ret;
-	int i;
-	uint8_t data;
-
-	/* check whether ADC is enabled */
-	ret = intel_msic_reg_read(INTEL_MSIC_ADC1CNTL1, &data);
-	if (ret)
-		return ret;
-
-	if ((data & MSIC_ADC_ENBL) == 0)
-		return 0;
-
-	/* ADC is already enabled; Looking for an empty channel */
-	for (i = 0; i < ADC_CHANLS_MAX; i++) {
-		ret = intel_msic_reg_read(ADC_CHNL_START_ADDR + i, &data);
-		if (ret)
-			return ret;
-
-		if (data & MSIC_STOPBIT_MASK) {
-			ret = i;
-			break;
-		}
-	}
-	return (ret > ADC_LOOP_MAX) ? (-EINVAL) : ret;
-}
-
-/**
- * mid_initialize_adc - initializing the ADC
- * @dev: our device structure
- *
- * Initialize the ADC for reading thermistor values. Can sleep.
- */
-static int mid_initialize_adc(struct device *dev)
-{
-	u8  data;
-	u16 base_addr;
-	int ret;
-
-	/*
-	 * Ensure that adctherm is disabled before we
-	 * initialize the ADC
-	 */
-	ret = intel_msic_reg_read(INTEL_MSIC_ADC1CNTL3, &data);
-	if (ret)
-		return ret;
-
-	data &= ~MSIC_ADCTHERM_MASK;
-	ret = intel_msic_reg_write(INTEL_MSIC_ADC1CNTL3, data);
-	if (ret)
-		return ret;
-
-	/* Index of the first channel in which the stop bit is set */
-	channel_index = find_free_channel();
-	if (channel_index < 0) {
-		dev_err(dev, "No free ADC channels");
-		return channel_index;
-	}
-
-	base_addr = ADC_CHNL_START_ADDR + channel_index;
-
-	if (!(channel_index == 0 || channel_index == ADC_LOOP_MAX)) {
-		/* Reset stop bit for channels other than 0 and 12 */
-		ret = reset_stopbit(base_addr);
-		if (ret)
-			return ret;
-
-		/* Index of the first free channel */
-		base_addr++;
-		channel_index++;
-	}
-
-	ret = set_up_therm_channel(base_addr);
-	if (ret) {
-		dev_err(dev, "unable to enable ADC");
-		return ret;
-	}
-	dev_dbg(dev, "ADC initialization successful");
-	return ret;
-}
-
-/**
- * initialize_sensor - sets default temp and timer ranges
- * @index: index of the sensor
- *
- * Context: can sleep
- */
-static struct thermal_device_info *initialize_sensor(int index)
-{
-	struct thermal_device_info *td_info =
-		kzalloc(sizeof(struct thermal_device_info), GFP_KERNEL);
-
-	if (!td_info)
-		return NULL;
-
-	/* Set the base addr of the channel for this sensor */
-	td_info->chnl_addr = ADC_DATA_START_ADDR + 2 * (channel_index + index);
-	/* Sensor 3 is direct conversion */
-	if (index == 3)
-		td_info->direct = 1;
-	return td_info;
-}
-
-#ifdef CONFIG_PM_SLEEP
-/**
- * mid_thermal_resume - resume routine
- * @dev: device structure
- *
- * mid thermal resume: re-initializes the adc. Can sleep.
- */
-static int mid_thermal_resume(struct device *dev)
-{
-	return mid_initialize_adc(dev);
-}
-
-/**
- * mid_thermal_suspend - suspend routine
- * @dev: device structure
- *
- * mid thermal suspend implements the suspend functionality
- * by stopping the ADC. Can sleep.
- */
-static int mid_thermal_suspend(struct device *dev)
-{
-	/*
-	 * This just stops the ADC and does not disable it.
-	 * temporary workaround until we have a generic ADC driver.
-	 * If 0 is passed, it disables the ADC.
-	 */
-	return configure_adc(0);
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(mid_thermal_pm,
-			 mid_thermal_suspend, mid_thermal_resume);
-
-/**
- * read_curr_temp - reads the current temperature and stores in temp
- * @temp: holds the current temperature value after reading
- *
- * Can sleep
- */
-static int read_curr_temp(struct thermal_zone_device *tzd, int *temp)
-{
-	WARN_ON(tzd == NULL);
-	return mid_read_temp(tzd, temp);
-}
-
-/* Can't be const */
-static struct thermal_zone_device_ops tzd_ops = {
-	.get_temp = read_curr_temp,
-};
-
-/**
- * mid_thermal_probe - mfld thermal initialize
- * @pdev: platform device structure
- *
- * mid thermal probe initializes the hardware and registers
- * all the sensors with the generic thermal framework. Can sleep.
- */
-static int mid_thermal_probe(struct platform_device *pdev)
-{
-	static char *name[MSIC_THERMAL_SENSORS] = {
-		"skin0", "skin1", "sys", "msicdie"
-	};
-
-	int ret;
-	int i;
-	struct platform_info *pinfo;
-
-	pinfo = devm_kzalloc(&pdev->dev, sizeof(struct platform_info),
-			     GFP_KERNEL);
-	if (!pinfo)
-		return -ENOMEM;
-
-	/* Initializing the hardware */
-	ret = mid_initialize_adc(&pdev->dev);
-	if (ret) {
-		dev_err(&pdev->dev, "ADC init failed");
-		return ret;
-	}
-
-	/* Register each sensor with the generic thermal framework*/
-	for (i = 0; i < MSIC_THERMAL_SENSORS; i++) {
-		struct thermal_device_info *td_info = initialize_sensor(i);
-
-		if (!td_info) {
-			ret = -ENOMEM;
-			goto err;
-		}
-		pinfo->tzd[i] = thermal_zone_device_register(name[i],
-				0, 0, td_info, &tzd_ops, NULL, 0, 0);
-		if (IS_ERR(pinfo->tzd[i])) {
-			kfree(td_info);
-			ret = PTR_ERR(pinfo->tzd[i]);
-			goto err;
-		}
-		ret = thermal_zone_device_enable(pinfo->tzd[i]);
-		if (ret) {
-			kfree(td_info);
-			thermal_zone_device_unregister(pinfo->tzd[i]);
-			goto err;
-		}
-	}
-
-	pinfo->pdev = pdev;
-	platform_set_drvdata(pdev, pinfo);
-	return 0;
-
-err:
-	while (--i >= 0) {
-		kfree(pinfo->tzd[i]->devdata);
-		thermal_zone_device_unregister(pinfo->tzd[i]);
-	}
-	configure_adc(0);
-	return ret;
-}
-
-/**
- * mid_thermal_remove - mfld thermal finalize
- * @dev: platform device structure
- *
- * MLFD thermal remove unregisters all the sensors from the generic
- * thermal framework. Can sleep.
- */
-static int mid_thermal_remove(struct platform_device *pdev)
-{
-	int i;
-	struct platform_info *pinfo = platform_get_drvdata(pdev);
-
-	for (i = 0; i < MSIC_THERMAL_SENSORS; i++) {
-		kfree(pinfo->tzd[i]->devdata);
-		thermal_zone_device_unregister(pinfo->tzd[i]);
-	}
-
-	/* Stop the ADC */
-	return configure_adc(0);
-}
-
-#define DRIVER_NAME "msic_thermal"
-
-static const struct platform_device_id therm_id_table[] = {
-	{ DRIVER_NAME, 1 },
-	{ }
-};
-MODULE_DEVICE_TABLE(platform, therm_id_table);
-
-static struct platform_driver mid_thermal_driver = {
-	.driver = {
-		.name = DRIVER_NAME,
-		.pm = &mid_thermal_pm,
-	},
-	.probe = mid_thermal_probe,
-	.remove = mid_thermal_remove,
-	.id_table = therm_id_table,
-};
-
-module_platform_driver(mid_thermal_driver);
-
-MODULE_AUTHOR("Durgadoss R <durgadoss.r@intel.com>");
-MODULE_DESCRIPTION("Intel Medfield Platform Thermal Driver");
-MODULE_LICENSE("GPL v2");