Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Maxim MAX197 A/D Converter driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2012 Savoir-faire Linux Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *          Vivien Didelot <vivien.didelot@savoirfairelinux.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * For further information, see the Documentation/hwmon/max197.rst file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/hwmon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/platform_data/max197.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define MAX199_LIMIT	4000		/* 4V */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define MAX197_LIMIT	10000		/* 10V */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define MAX197_NUM_CH	8		/* 8 Analog Input Channels */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) /* Control byte format */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define MAX197_BIP	(1 << 3)	/* Bipolarity */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define MAX197_RNG	(1 << 4)	/* Full range */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define MAX197_SCALE	12207		/* Scale coefficient for raw data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) /* List of supported chips */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) enum max197_chips { max197, max199 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * struct max197_data - device instance specific data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * @pdata:		Platform data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * @hwmon_dev:		The hwmon device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * @lock:		Read/Write mutex.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * @limit:		Max range value (10V for MAX197, 4V for MAX199).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * @scale:		Need to scale.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  * @ctrl_bytes:		Channels control byte.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) struct max197_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct max197_platform_data *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct device *hwmon_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	int limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	bool scale;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	u8 ctrl_bytes[MAX197_NUM_CH];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static inline void max197_set_unipolarity(struct max197_data *data, int channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	data->ctrl_bytes[channel] &= ~MAX197_BIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static inline void max197_set_bipolarity(struct max197_data *data, int channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	data->ctrl_bytes[channel] |= MAX197_BIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) static inline void max197_set_half_range(struct max197_data *data, int channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	data->ctrl_bytes[channel] &= ~MAX197_RNG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static inline void max197_set_full_range(struct max197_data *data, int channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	data->ctrl_bytes[channel] |= MAX197_RNG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) static inline bool max197_is_bipolar(struct max197_data *data, int channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	return data->ctrl_bytes[channel] & MAX197_BIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) static inline bool max197_is_full_range(struct max197_data *data, int channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	return data->ctrl_bytes[channel] & MAX197_RNG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) /* Function called on read access on in{0,1,2,3,4,5,6,7}_{min,max} */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) static ssize_t max197_show_range(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 				 struct device_attribute *devattr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	struct max197_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	int channel = attr->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	bool is_min = attr->nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	int range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	if (mutex_lock_interruptible(&data->lock))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	range = max197_is_full_range(data, channel) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		data->limit : data->limit / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (is_min) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		if (max197_is_bipolar(data, channel))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			range = -range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 			range = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	return sprintf(buf, "%d\n", range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /* Function called on write access on in{0,1,2,3,4,5,6,7}_{min,max} */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static ssize_t max197_store_range(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 				  struct device_attribute *devattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 				  const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	struct max197_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	int channel = attr->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	bool is_min = attr->nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	long value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	int half = data->limit / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	int full = data->limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	if (kstrtol(buf, 10, &value))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	if (is_min) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		if (value <= -full)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 			value = -full;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		else if (value < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 			value = -half;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			value = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		if (value >= full)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 			value = full;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			value = half;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (mutex_lock_interruptible(&data->lock))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (value == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		/* We can deduce only the polarity */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		max197_set_unipolarity(data, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	} else if (value == -half) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		max197_set_bipolarity(data, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		max197_set_half_range(data, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	} else if (value == -full) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		max197_set_bipolarity(data, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		max197_set_full_range(data, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	} else if (value == half) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		/* We can deduce only the range */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		max197_set_half_range(data, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	} else if (value == full) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		/* We can deduce only the range */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		max197_set_full_range(data, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /* Function called on read access on in{0,1,2,3,4,5,6,7}_input */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static ssize_t max197_show_input(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 				 struct device_attribute *devattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 				 char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	struct max197_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	int channel = attr->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	s32 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (mutex_lock_interruptible(&data->lock))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	ret = data->pdata->convert(data->ctrl_bytes[channel]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		dev_err(dev, "conversion failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	value = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	 * Coefficient to apply on raw value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	 * See Table 1. Full Scale and Zero Scale in the MAX197 datasheet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	if (data->scale) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		value *= MAX197_SCALE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		if (max197_is_full_range(data, channel))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 			value *= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		value /= 10000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	ret = sprintf(buf, "%d\n", value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static ssize_t name_show(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			 char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	return sprintf(buf, "%s\n", pdev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #define MAX197_SENSOR_DEVICE_ATTR_CH(chan)				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	static SENSOR_DEVICE_ATTR(in##chan##_input, S_IRUGO,		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 				  max197_show_input, NULL, chan);	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	static SENSOR_DEVICE_ATTR_2(in##chan##_min, S_IRUGO | S_IWUSR,	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 				    max197_show_range,			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 				    max197_store_range,			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 				    true, chan);			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	static SENSOR_DEVICE_ATTR_2(in##chan##_max, S_IRUGO | S_IWUSR,	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 				    max197_show_range,			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 				    max197_store_range,			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 				    false, chan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) #define MAX197_SENSOR_DEV_ATTR_IN(chan)					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	&sensor_dev_attr_in##chan##_input.dev_attr.attr,		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	&sensor_dev_attr_in##chan##_max.dev_attr.attr,			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	&sensor_dev_attr_in##chan##_min.dev_attr.attr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) static DEVICE_ATTR_RO(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) MAX197_SENSOR_DEVICE_ATTR_CH(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) MAX197_SENSOR_DEVICE_ATTR_CH(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) MAX197_SENSOR_DEVICE_ATTR_CH(2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) MAX197_SENSOR_DEVICE_ATTR_CH(3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) MAX197_SENSOR_DEVICE_ATTR_CH(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) MAX197_SENSOR_DEVICE_ATTR_CH(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) MAX197_SENSOR_DEVICE_ATTR_CH(6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) MAX197_SENSOR_DEVICE_ATTR_CH(7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) static const struct attribute_group max197_sysfs_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	.attrs = (struct attribute *[]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		&dev_attr_name.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		MAX197_SENSOR_DEV_ATTR_IN(0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		MAX197_SENSOR_DEV_ATTR_IN(1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		MAX197_SENSOR_DEV_ATTR_IN(2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		MAX197_SENSOR_DEV_ATTR_IN(3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		MAX197_SENSOR_DEV_ATTR_IN(4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		MAX197_SENSOR_DEV_ATTR_IN(5),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		MAX197_SENSOR_DEV_ATTR_IN(6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		MAX197_SENSOR_DEV_ATTR_IN(7),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static int max197_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	int ch, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	struct max197_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	struct max197_platform_data *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	enum max197_chips chip = platform_get_device_id(pdev)->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	if (pdata == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		dev_err(&pdev->dev, "no platform data supplied\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	if (pdata->convert == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		dev_err(&pdev->dev, "no convert function supplied\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	data = devm_kzalloc(&pdev->dev, sizeof(struct max197_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	data->pdata = pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	mutex_init(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	if (chip == max197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		data->limit = MAX197_LIMIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		data->scale = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		data->limit = MAX199_LIMIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		data->scale = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	for (ch = 0; ch < MAX197_NUM_CH; ch++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		data->ctrl_bytes[ch] = (u8) ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	platform_set_drvdata(pdev, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	ret = sysfs_create_group(&pdev->dev.kobj, &max197_sysfs_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		dev_err(&pdev->dev, "sysfs create group failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	data->hwmon_dev = hwmon_device_register(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	if (IS_ERR(data->hwmon_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		ret = PTR_ERR(data->hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		dev_err(&pdev->dev, "hwmon device register failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	sysfs_remove_group(&pdev->dev.kobj, &max197_sysfs_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static int max197_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	struct max197_data *data = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	hwmon_device_unregister(data->hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	sysfs_remove_group(&pdev->dev.kobj, &max197_sysfs_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static const struct platform_device_id max197_device_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	{ "max197", max197 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	{ "max199", max199 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) MODULE_DEVICE_TABLE(platform, max197_device_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) static struct platform_driver max197_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		.name = "max197",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	.probe = max197_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	.remove = max197_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	.id_table = max197_device_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) module_platform_driver(max197_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) MODULE_AUTHOR("Savoir-faire Linux Inc. <kernel@savoirfairelinux.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) MODULE_DESCRIPTION("Maxim MAX197 A/D Converter driver");