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https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-09 01:28:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
337
drivers/hwmon/pcf8591.c
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337
drivers/hwmon/pcf8591.c
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@ -0,0 +1,337 @@
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/*
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* Copyright (C) 2001-2004 Aurelien Jarno <aurelien@aurel32.net>
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* Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
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* the help of Jean Delvare <jdelvare@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/mutex.h>
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#include <linux/err.h>
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#include <linux/hwmon.h>
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/* Insmod parameters */
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static int input_mode;
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module_param(input_mode, int, 0);
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MODULE_PARM_DESC(input_mode,
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"Analog input mode:\n"
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" 0 = four single ended inputs\n"
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" 1 = three differential inputs\n"
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" 2 = single ended and differential mixed\n"
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" 3 = two differential inputs\n");
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/*
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* The PCF8591 control byte
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* 7 6 5 4 3 2 1 0
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* | 0 |AOEF| AIP | 0 |AINC| AICH |
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*/
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/* Analog Output Enable Flag (analog output active if 1) */
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#define PCF8591_CONTROL_AOEF 0x40
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/*
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* Analog Input Programming
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* 0x00 = four single ended inputs
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* 0x10 = three differential inputs
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* 0x20 = single ended and differential mixed
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* 0x30 = two differential inputs
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*/
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#define PCF8591_CONTROL_AIP_MASK 0x30
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/* Autoincrement Flag (switch on if 1) */
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#define PCF8591_CONTROL_AINC 0x04
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/*
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* Channel selection
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* 0x00 = channel 0
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* 0x01 = channel 1
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* 0x02 = channel 2
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* 0x03 = channel 3
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*/
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#define PCF8591_CONTROL_AICH_MASK 0x03
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/* Initial values */
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#define PCF8591_INIT_CONTROL ((input_mode << 4) | PCF8591_CONTROL_AOEF)
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#define PCF8591_INIT_AOUT 0 /* DAC out = 0 */
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/* Conversions */
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#define REG_TO_SIGNED(reg) (((reg) & 0x80) ? ((reg) - 256) : (reg))
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struct pcf8591_data {
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struct device *hwmon_dev;
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struct mutex update_lock;
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u8 control;
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u8 aout;
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};
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static void pcf8591_init_client(struct i2c_client *client);
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static int pcf8591_read_channel(struct device *dev, int channel);
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/* following are the sysfs callback functions */
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#define show_in_channel(channel) \
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static ssize_t show_in##channel##_input(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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return sprintf(buf, "%d\n", pcf8591_read_channel(dev, channel));\
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} \
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static DEVICE_ATTR(in##channel##_input, S_IRUGO, \
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show_in##channel##_input, NULL);
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show_in_channel(0);
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show_in_channel(1);
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show_in_channel(2);
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show_in_channel(3);
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static ssize_t show_out0_ouput(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct pcf8591_data *data = i2c_get_clientdata(to_i2c_client(dev));
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return sprintf(buf, "%d\n", data->aout * 10);
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}
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static ssize_t set_out0_output(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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unsigned long val;
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struct i2c_client *client = to_i2c_client(dev);
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struct pcf8591_data *data = i2c_get_clientdata(client);
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int err;
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err = kstrtoul(buf, 10, &val);
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if (err)
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return err;
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val /= 10;
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if (val > 255)
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return -EINVAL;
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data->aout = val;
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i2c_smbus_write_byte_data(client, data->control, data->aout);
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return count;
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}
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static DEVICE_ATTR(out0_output, S_IWUSR | S_IRUGO,
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show_out0_ouput, set_out0_output);
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static ssize_t show_out0_enable(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct pcf8591_data *data = i2c_get_clientdata(to_i2c_client(dev));
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return sprintf(buf, "%u\n", !(!(data->control & PCF8591_CONTROL_AOEF)));
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}
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static ssize_t set_out0_enable(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct pcf8591_data *data = i2c_get_clientdata(client);
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unsigned long val;
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int err;
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err = kstrtoul(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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if (val)
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data->control |= PCF8591_CONTROL_AOEF;
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else
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data->control &= ~PCF8591_CONTROL_AOEF;
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i2c_smbus_write_byte(client, data->control);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static DEVICE_ATTR(out0_enable, S_IWUSR | S_IRUGO,
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show_out0_enable, set_out0_enable);
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static struct attribute *pcf8591_attributes[] = {
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&dev_attr_out0_enable.attr,
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&dev_attr_out0_output.attr,
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&dev_attr_in0_input.attr,
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&dev_attr_in1_input.attr,
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NULL
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};
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static const struct attribute_group pcf8591_attr_group = {
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.attrs = pcf8591_attributes,
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};
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static struct attribute *pcf8591_attributes_opt[] = {
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&dev_attr_in2_input.attr,
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&dev_attr_in3_input.attr,
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NULL
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};
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static const struct attribute_group pcf8591_attr_group_opt = {
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.attrs = pcf8591_attributes_opt,
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};
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/*
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* Real code
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*/
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static int pcf8591_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct pcf8591_data *data;
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int err;
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data = devm_kzalloc(&client->dev, sizeof(struct pcf8591_data),
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GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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i2c_set_clientdata(client, data);
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mutex_init(&data->update_lock);
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/* Initialize the PCF8591 chip */
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pcf8591_init_client(client);
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/* Register sysfs hooks */
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err = sysfs_create_group(&client->dev.kobj, &pcf8591_attr_group);
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if (err)
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return err;
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/* Register input2 if not in "two differential inputs" mode */
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if (input_mode != 3) {
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err = device_create_file(&client->dev, &dev_attr_in2_input);
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if (err)
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goto exit_sysfs_remove;
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}
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/* Register input3 only in "four single ended inputs" mode */
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if (input_mode == 0) {
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err = device_create_file(&client->dev, &dev_attr_in3_input);
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if (err)
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goto exit_sysfs_remove;
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}
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data->hwmon_dev = hwmon_device_register(&client->dev);
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if (IS_ERR(data->hwmon_dev)) {
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err = PTR_ERR(data->hwmon_dev);
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goto exit_sysfs_remove;
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}
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return 0;
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exit_sysfs_remove:
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sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group_opt);
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sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group);
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return err;
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}
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static int pcf8591_remove(struct i2c_client *client)
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{
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struct pcf8591_data *data = i2c_get_clientdata(client);
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hwmon_device_unregister(data->hwmon_dev);
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sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group_opt);
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sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group);
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return 0;
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}
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/* Called when we have found a new PCF8591. */
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static void pcf8591_init_client(struct i2c_client *client)
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{
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struct pcf8591_data *data = i2c_get_clientdata(client);
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data->control = PCF8591_INIT_CONTROL;
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data->aout = PCF8591_INIT_AOUT;
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i2c_smbus_write_byte_data(client, data->control, data->aout);
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/*
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* The first byte transmitted contains the conversion code of the
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* previous read cycle. FLUSH IT!
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*/
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i2c_smbus_read_byte(client);
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}
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static int pcf8591_read_channel(struct device *dev, int channel)
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{
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u8 value;
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struct i2c_client *client = to_i2c_client(dev);
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struct pcf8591_data *data = i2c_get_clientdata(client);
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mutex_lock(&data->update_lock);
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if ((data->control & PCF8591_CONTROL_AICH_MASK) != channel) {
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data->control = (data->control & ~PCF8591_CONTROL_AICH_MASK)
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| channel;
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i2c_smbus_write_byte(client, data->control);
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/*
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* The first byte transmitted contains the conversion code of
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* the previous read cycle. FLUSH IT!
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*/
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i2c_smbus_read_byte(client);
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}
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value = i2c_smbus_read_byte(client);
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mutex_unlock(&data->update_lock);
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if ((channel == 2 && input_mode == 2) ||
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(channel != 3 && (input_mode == 1 || input_mode == 3)))
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return 10 * REG_TO_SIGNED(value);
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else
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return 10 * value;
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}
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static const struct i2c_device_id pcf8591_id[] = {
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{ "pcf8591", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, pcf8591_id);
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static struct i2c_driver pcf8591_driver = {
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.driver = {
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.name = "pcf8591",
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},
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.probe = pcf8591_probe,
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.remove = pcf8591_remove,
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.id_table = pcf8591_id,
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};
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static int __init pcf8591_init(void)
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{
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if (input_mode < 0 || input_mode > 3) {
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pr_warn("invalid input_mode (%d)\n", input_mode);
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input_mode = 0;
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}
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return i2c_add_driver(&pcf8591_driver);
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}
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static void __exit pcf8591_exit(void)
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{
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i2c_del_driver(&pcf8591_driver);
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}
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MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
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MODULE_DESCRIPTION("PCF8591 driver");
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MODULE_LICENSE("GPL");
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module_init(pcf8591_init);
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module_exit(pcf8591_exit);
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