kernel: add linux 4.4 support

Based on 4.4-rc3. Runtime tested on MIPS.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 47701

1 files changed, 339 insertions, 0 deletions

diff --git a/target/linux/generic/patches-4.4/880-gateworks_system_controller.patch b/target/linux/generic/patches-4.4/880-gateworks_system_controller.patch
new file mode 100644
index 0000000000..a19f30082e
--- /dev/null
+++ b/target/linux/generic/patches-4.4/880-gateworks_system_controller.patch
@@ -0,0 +1,339 @@
+--- a/drivers/hwmon/Kconfig
++++ b/drivers/hwmon/Kconfig
+@@ -527,6 +527,15 @@ config SENSORS_G762
+ 	  This driver can also be built as a module.  If so, the module
+ 	  will be called g762.
+ 
++config SENSORS_GSC
++	tristate "Gateworks System Controller"
++	depends on I2C
++	help
++	  If you say yes here you get support for the Gateworks System Controller.
++
++	  This driver can also be built as a module. If so, the module
++	  will be called gsc.
++
+ config SENSORS_GPIO_FAN
+ 	tristate "GPIO fan"
+ 	depends on GPIOLIB || COMPILE_TEST
+--- a/drivers/hwmon/Makefile
++++ b/drivers/hwmon/Makefile
+@@ -160,6 +160,7 @@ obj-$(CONFIG_SENSORS_W83L785TS)	+= w83l7
+ obj-$(CONFIG_SENSORS_W83L786NG)	+= w83l786ng.o
+ obj-$(CONFIG_SENSORS_WM831X)	+= wm831x-hwmon.o
+ obj-$(CONFIG_SENSORS_WM8350)	+= wm8350-hwmon.o
++obj-$(CONFIG_SENSORS_GSC)	+= gsc.o
+ 
+ obj-$(CONFIG_PMBUS)		+= pmbus/
+ 
+--- /dev/null
++++ b/drivers/hwmon/gsc.c
+@@ -0,0 +1,308 @@
++/*
++ * A hwmon driver for the Gateworks System Controller 
++ * Copyright (C) 2009 Gateworks Corporation
++ *
++ * Author: Chris Lang <clang@gateworks.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License,
++ * as published by the Free Software Foundation - version 2.
++ */
++
++#include <linux/module.h>
++#include <linux/i2c.h>
++#include <linux/hwmon.h>
++#include <linux/hwmon-sysfs.h>
++#include <linux/err.h>
++#include <linux/slab.h>
++
++#define DRV_VERSION "0.2"
++
++enum chips { gsp };
++
++/* AD7418 registers */
++#define GSP_REG_TEMP_IN		0x00
++#define GSP_REG_VIN		0x02
++#define GSP_REG_3P3		0x05
++#define GSP_REG_BAT		0x08
++#define GSP_REG_5P0		0x0b
++#define GSP_REG_CORE		0x0e
++#define GSP_REG_CPU1		0x11
++#define GSP_REG_CPU2		0x14
++#define GSP_REG_DRAM		0x17
++#define GSP_REG_EXT_BAT		0x1a
++#define GSP_REG_IO1		0x1d
++#define GSP_REG_IO2 		0x20
++#define GSP_REG_PCIE		0x23
++#define GSP_REG_CURRENT		0x26
++#define GSP_FAN_0		0x2C
++#define GSP_FAN_1		0x2E
++#define GSP_FAN_2		0x30
++#define GSP_FAN_3		0x32
++#define GSP_FAN_4		0x34
++#define GSP_FAN_5		0x36
++
++struct gsp_sensor_info {
++	const char* name;
++	int reg;
++};
++
++static const struct gsp_sensor_info gsp_sensors[] = {
++	{"temp", GSP_REG_TEMP_IN},
++	{"vin", GSP_REG_VIN},
++	{"3p3", GSP_REG_3P3},
++	{"bat", GSP_REG_BAT},
++	{"5p0", GSP_REG_5P0},
++	{"core", GSP_REG_CORE},
++	{"cpu1", GSP_REG_CPU1},
++	{"cpu2", GSP_REG_CPU2},
++	{"dram", GSP_REG_DRAM},
++	{"ext_bat", GSP_REG_EXT_BAT},
++	{"io1", GSP_REG_IO1},
++	{"io2", GSP_REG_IO2},
++	{"pci2", GSP_REG_PCIE},
++	{"current", GSP_REG_CURRENT},
++	{"fan_point0", GSP_FAN_0},
++	{"fan_point1", GSP_FAN_1},
++	{"fan_point2", GSP_FAN_2},
++	{"fan_point3", GSP_FAN_3},
++	{"fan_point4", GSP_FAN_4},
++	{"fan_point5", GSP_FAN_5},
++};
++
++struct gsp_data {
++	struct device		*hwmon_dev;
++	struct attribute_group	attrs;
++	enum chips		type;
++};
++
++static int gsp_probe(struct i2c_client *client,
++			const struct i2c_device_id *id);
++static int gsp_remove(struct i2c_client *client);
++
++static const struct i2c_device_id gsp_id[] = {
++	{ "gsp", 0 },
++	{ }
++};
++MODULE_DEVICE_TABLE(i2c, gsp_id);
++
++static struct i2c_driver gsp_driver = {
++	.driver = {
++		.name	= "gsp",
++	},
++	.probe		= gsp_probe,
++	.remove		= gsp_remove,
++	.id_table	= gsp_id,
++};
++
++/* All registers are word-sized, except for the configuration registers.
++ * AD7418 uses a high-byte first convention. Do NOT use those functions to
++ * access the configuration registers CONF and CONF2, as they are byte-sized.
++ */
++static inline int gsp_read(struct i2c_client *client, u8 reg)
++{
++	unsigned int adc = 0;
++	if (reg == GSP_REG_TEMP_IN || reg > GSP_REG_CURRENT)
++	{
++		adc |= i2c_smbus_read_byte_data(client, reg);
++		adc |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
++		return adc;
++	}
++	else
++	{
++		adc |= i2c_smbus_read_byte_data(client, reg);
++		adc |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
++		adc |= i2c_smbus_read_byte_data(client, reg + 2) << 16;
++		return adc;
++	}
++}
++
++static inline int gsp_write(struct i2c_client *client, u8 reg, u16 value)
++{
++	i2c_smbus_write_byte_data(client, reg, value & 0xff);
++	i2c_smbus_write_byte_data(client, reg + 1, ((value >> 8) & 0xff));
++	return 1;
++}
++
++static ssize_t show_adc(struct device *dev, struct device_attribute *devattr,
++			char *buf)
++{
++	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
++	struct i2c_client *client = to_i2c_client(dev);
++	return sprintf(buf, "%d\n", gsp_read(client, gsp_sensors[attr->index].reg));
++}
++
++static ssize_t show_label(struct device *dev,
++			struct device_attribute *devattr, char *buf)
++{
++	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
++
++	return sprintf(buf, "%s\n", gsp_sensors[attr->index].name);
++}
++
++static ssize_t store_fan(struct device *dev,
++			struct device_attribute *devattr, const char *buf, size_t count)
++{
++	u16 val;
++	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
++	struct i2c_client *client = to_i2c_client(dev);
++	val = simple_strtoul(buf, NULL, 10);
++	gsp_write(client, gsp_sensors[attr->index].reg, val);
++	return count;
++}
++
++static SENSOR_DEVICE_ATTR(temp0_input, S_IRUGO, show_adc, NULL, 0);
++static SENSOR_DEVICE_ATTR(temp0_label, S_IRUGO, show_label, NULL, 0);
++
++static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_adc, NULL, 1);
++static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL, 1);
++static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_adc, NULL, 2);
++static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_label, NULL, 2);
++static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_adc, NULL, 3);
++static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_label, NULL, 3);
++static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_adc, NULL, 4);
++static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 4);
++static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_adc, NULL, 5);
++static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL, 5);
++static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_adc, NULL, 6);
++static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL, 6);
++static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_adc, NULL, 7);
++static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL, 7);
++static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_adc, NULL, 8);
++static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 8);
++static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_adc, NULL, 9);
++static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 9);
++static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, show_adc, NULL, 10);
++static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 10);
++static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, show_adc, NULL, 11);
++static SENSOR_DEVICE_ATTR(in10_label, S_IRUGO, show_label, NULL, 11);
++static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, show_adc, NULL, 12);
++static SENSOR_DEVICE_ATTR(in11_label, S_IRUGO, show_label, NULL, 12);
++static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, show_adc, NULL, 13);
++static SENSOR_DEVICE_ATTR(in12_label, S_IRUGO, show_label, NULL, 13);
++
++static SENSOR_DEVICE_ATTR(fan0_point0, S_IRUGO | S_IWUSR, show_adc, store_fan, 14);
++static SENSOR_DEVICE_ATTR(fan0_point1, S_IRUGO | S_IWUSR, show_adc, store_fan, 15);
++static SENSOR_DEVICE_ATTR(fan0_point2, S_IRUGO | S_IWUSR, show_adc, store_fan, 16);
++static SENSOR_DEVICE_ATTR(fan0_point3, S_IRUGO | S_IWUSR, show_adc, store_fan, 17);
++static SENSOR_DEVICE_ATTR(fan0_point4, S_IRUGO | S_IWUSR, show_adc, store_fan, 18);
++static SENSOR_DEVICE_ATTR(fan0_point5, S_IRUGO | S_IWUSR, show_adc, store_fan, 19);
++
++static struct attribute *gsp_attributes[] = {
++	&sensor_dev_attr_temp0_input.dev_attr.attr,
++	&sensor_dev_attr_in0_input.dev_attr.attr,
++	&sensor_dev_attr_in1_input.dev_attr.attr,
++	&sensor_dev_attr_in2_input.dev_attr.attr,
++	&sensor_dev_attr_in3_input.dev_attr.attr,
++	&sensor_dev_attr_in4_input.dev_attr.attr,
++	&sensor_dev_attr_in5_input.dev_attr.attr,
++	&sensor_dev_attr_in6_input.dev_attr.attr,
++	&sensor_dev_attr_in7_input.dev_attr.attr,
++	&sensor_dev_attr_in8_input.dev_attr.attr,
++	&sensor_dev_attr_in9_input.dev_attr.attr,
++	&sensor_dev_attr_in10_input.dev_attr.attr,
++	&sensor_dev_attr_in11_input.dev_attr.attr,
++	&sensor_dev_attr_in12_input.dev_attr.attr,
++
++	&sensor_dev_attr_temp0_label.dev_attr.attr,
++	&sensor_dev_attr_in0_label.dev_attr.attr,
++	&sensor_dev_attr_in1_label.dev_attr.attr,
++	&sensor_dev_attr_in2_label.dev_attr.attr,
++	&sensor_dev_attr_in3_label.dev_attr.attr,
++	&sensor_dev_attr_in4_label.dev_attr.attr,
++	&sensor_dev_attr_in5_label.dev_attr.attr,
++	&sensor_dev_attr_in6_label.dev_attr.attr,
++	&sensor_dev_attr_in7_label.dev_attr.attr,
++	&sensor_dev_attr_in8_label.dev_attr.attr,
++	&sensor_dev_attr_in9_label.dev_attr.attr,
++	&sensor_dev_attr_in10_label.dev_attr.attr,
++	&sensor_dev_attr_in11_label.dev_attr.attr,
++	&sensor_dev_attr_in12_label.dev_attr.attr,
++
++	&sensor_dev_attr_fan0_point0.dev_attr.attr,
++	&sensor_dev_attr_fan0_point1.dev_attr.attr,
++	&sensor_dev_attr_fan0_point2.dev_attr.attr,
++	&sensor_dev_attr_fan0_point3.dev_attr.attr,
++	&sensor_dev_attr_fan0_point4.dev_attr.attr,
++	&sensor_dev_attr_fan0_point5.dev_attr.attr,
++	NULL
++};
++
++
++static int gsp_probe(struct i2c_client *client,
++			 const struct i2c_device_id *id)
++{
++	struct i2c_adapter *adapter = client->adapter;
++	struct gsp_data *data;
++	int err;
++
++	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
++					I2C_FUNC_SMBUS_WORD_DATA)) {
++		err = -EOPNOTSUPP;
++		goto exit;
++	}
++
++	if (!(data = kzalloc(sizeof(struct gsp_data), GFP_KERNEL))) {
++		err = -ENOMEM;
++		goto exit;
++	}
++
++	i2c_set_clientdata(client, data);
++
++	data->type = id->driver_data;
++
++	switch (data->type) {
++	case 0:
++		data->attrs.attrs = gsp_attributes;
++		break;
++	}
++
++	dev_info(&client->dev, "%s chip found\n", client->name);
++
++	/* Register sysfs hooks */
++	if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
++		goto exit_free;
++
++	data->hwmon_dev = hwmon_device_register(&client->dev);
++	if (IS_ERR(data->hwmon_dev)) {
++		err = PTR_ERR(data->hwmon_dev);
++		goto exit_remove;
++	}
++
++	return 0;
++
++exit_remove:
++	sysfs_remove_group(&client->dev.kobj, &data->attrs);
++exit_free:
++	kfree(data);
++exit:
++	return err;
++}
++
++static int gsp_remove(struct i2c_client *client)
++{
++	struct gsp_data *data = i2c_get_clientdata(client);
++	hwmon_device_unregister(data->hwmon_dev);
++	sysfs_remove_group(&client->dev.kobj, &data->attrs);
++	kfree(data);
++	return 0;
++}
++
++static int __init gsp_init(void)
++{
++	return i2c_add_driver(&gsp_driver);
++}
++
++static void __exit gsp_exit(void)
++{
++	i2c_del_driver(&gsp_driver);
++}
++
++module_init(gsp_init);
++module_exit(gsp_exit);
++
++MODULE_AUTHOR("Chris Lang <clang@gateworks.com>");
++MODULE_DESCRIPTION("GSC HWMON driver");
++MODULE_LICENSE("GPL");
++MODULE_VERSION(DRV_VERSION);
++