target/linux/cns3xxx/patches-3.3/110-gateworks_gsp_support.patch

   1 --- a/drivers/hwmon/Kconfig
   2 +++ b/drivers/hwmon/Kconfig
   3 @@ -423,6 +423,15 @@ config SENSORS_GL520SM
   4           This driver can also be built as a module.  If so, the module
   5           will be called gl520sm.
   6
   7 +config SENSORS_GSP
   8 +       tristate "Gateworks System Peripheral"
   9 +       depends on I2C && EXPERIMENTAL
  10 +       help
  11 +         If you say yes here you get support for the Gateworks System Peripherals.
  12 +
  13 +         This driver can also be built as a module. If so, the module
  14 +         will be called gsp.
  15 +
  16  config SENSORS_GPIO_FAN
  17         tristate "GPIO fan"
  18         depends on GENERIC_GPIO
  19 --- a/drivers/hwmon/Makefile
  20 +++ b/drivers/hwmon/Makefile
  21 @@ -125,6 +125,7 @@ obj-$(CONFIG_SENSORS_W83L785TS)     += w83l7
  22  obj-$(CONFIG_SENSORS_W83L786NG)        += w83l786ng.o
  23  obj-$(CONFIG_SENSORS_WM831X)   += wm831x-hwmon.o
  24  obj-$(CONFIG_SENSORS_WM8350)   += wm8350-hwmon.o
  25 +obj-$(CONFIG_SENSORS_GSP)      += gsp.o
  26
  27  obj-$(CONFIG_PMBUS)            += pmbus/
  28
  29 --- /dev/null
  30 +++ b/drivers/hwmon/gsp.c
  31 @@ -0,0 +1,308 @@
  32 +/*
  33 + * A hwmon driver for the Gateworks System Peripheral
  34 + * Copyright (C) 2009 Gateworks Corporation
  35 + *
  36 + * Author: Chris Lang <clang@gateworks.com>
  37 + *
  38 + * This program is free software; you can redistribute it and/or modify
  39 + * it under the terms of the GNU General Public License,
  40 + * as published by the Free Software Foundation - version 2.
  41 + */
  42 +
  43 +#include <linux/module.h>
  44 +#include <linux/i2c.h>
  45 +#include <linux/hwmon.h>
  46 +#include <linux/hwmon-sysfs.h>
  47 +#include <linux/err.h>
  48 +#include <linux/slab.h>
  49 +
  50 +#define DRV_VERSION "0.2"
  51 +
  52 +enum chips { gsp };
  53 +
  54 +/* AD7418 registers */
  55 +#define GSP_REG_TEMP_IN                0x00
  56 +#define GSP_REG_VIN            0x02
  57 +#define GSP_REG_3P3            0x05
  58 +#define GSP_REG_BAT            0x08
  59 +#define GSP_REG_5P0            0x0b
  60 +#define GSP_REG_CORE           0x0e
  61 +#define GSP_REG_CPU1           0x11
  62 +#define GSP_REG_CPU2           0x14
  63 +#define GSP_REG_DRAM           0x17
  64 +#define GSP_REG_EXT_BAT                0x1a
  65 +#define GSP_REG_IO1            0x1d
  66 +#define GSP_REG_IO2            0x20
  67 +#define GSP_REG_PCIE           0x23
  68 +#define GSP_REG_CURRENT                0x26
  69 +#define GSP_FAN_0              0x2C
  70 +#define GSP_FAN_1              0x2E
  71 +#define GSP_FAN_2              0x30
  72 +#define GSP_FAN_3              0x32
  73 +#define GSP_FAN_4              0x34
  74 +#define GSP_FAN_5              0x36
  75 +
  76 +struct gsp_sensor_info {
  77 +       const char* name;
  78 +       int reg;
  79 +};
  80 +
  81 +static const struct gsp_sensor_info gsp_sensors[] = {
  82 +       {"temp", GSP_REG_TEMP_IN},
  83 +       {"vin", GSP_REG_VIN},
  84 +       {"3p3", GSP_REG_3P3},
  85 +       {"bat", GSP_REG_BAT},
  86 +       {"5p0", GSP_REG_5P0},
  87 +       {"core", GSP_REG_CORE},
  88 +       {"cpu1", GSP_REG_CPU1},
  89 +       {"cpu2", GSP_REG_CPU2},
  90 +       {"dram", GSP_REG_DRAM},
  91 +       {"ext_bat", GSP_REG_EXT_BAT},
  92 +       {"io1", GSP_REG_IO1},
  93 +       {"io2", GSP_REG_IO2},
  94 +       {"pci2", GSP_REG_PCIE},
  95 +       {"current", GSP_REG_CURRENT},
  96 +       {"fan_point0", GSP_FAN_0},
  97 +       {"fan_point1", GSP_FAN_1},
  98 +       {"fan_point2", GSP_FAN_2},
  99 +       {"fan_point3", GSP_FAN_3},
 100 +       {"fan_point4", GSP_FAN_4},
 101 +       {"fan_point5", GSP_FAN_5},
 102 +};
 103 +
 104 +struct gsp_data {
 105 +       struct device           *hwmon_dev;
 106 +       struct attribute_group  attrs;
 107 +       enum chips              type;
 108 +};
 109 +
 110 +static int gsp_probe(struct i2c_client *client,
 111 +                       const struct i2c_device_id *id);
 112 +static int gsp_remove(struct i2c_client *client);
 113 +
 114 +static const struct i2c_device_id gsp_id[] = {
 115 +       { "gsp", 0 },
 116 +       { }
 117 +};
 118 +MODULE_DEVICE_TABLE(i2c, gsp_id);
 119 +
 120 +static struct i2c_driver gsp_driver = {
 121 +       .driver = {
 122 +               .name   = "gsp",
 123 +       },
 124 +       .probe          = gsp_probe,
 125 +       .remove         = gsp_remove,
 126 +       .id_table       = gsp_id,
 127 +};
 128 +
 129 +/* All registers are word-sized, except for the configuration registers.
 130 + * AD7418 uses a high-byte first convention. Do NOT use those functions to
 131 + * access the configuration registers CONF and CONF2, as they are byte-sized.
 132 + */
 133 +static inline int gsp_read(struct i2c_client *client, u8 reg)
 134 +{
 135 +       unsigned int adc = 0;
 136 +       if (reg == GSP_REG_TEMP_IN || reg > GSP_REG_CURRENT)
 137 +       {
 138 +               adc |= i2c_smbus_read_byte_data(client, reg);
 139 +               adc |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
 140 +               return adc;
 141 +       }
 142 +       else
 143 +       {
 144 +               adc |= i2c_smbus_read_byte_data(client, reg);
 145 +               adc |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
 146 +               adc |= i2c_smbus_read_byte_data(client, reg + 2) << 16;
 147 +               return adc;
 148 +       }
 149 +}
 150 +
 151 +static inline int gsp_write(struct i2c_client *client, u8 reg, u16 value)
 152 +{
 153 +       i2c_smbus_write_byte_data(client, reg, value & 0xff);
 154 +       i2c_smbus_write_byte_data(client, reg + 1, ((value >> 8) & 0xff));
 155 +       return 1;
 156 +}
 157 +
 158 +static ssize_t show_adc(struct device *dev, struct device_attribute *devattr,
 159 +                       char *buf)
 160 +{
 161 +       struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 162 +       struct i2c_client *client = to_i2c_client(dev);
 163 +       return sprintf(buf, "%d\n", gsp_read(client, gsp_sensors[attr->index].reg));
 164 +}
 165 +
 166 +static ssize_t show_label(struct device *dev,
 167 +                       struct device_attribute *devattr, char *buf)
 168 +{
 169 +       struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 170 +
 171 +       return sprintf(buf, "%s\n", gsp_sensors[attr->index].name);
 172 +}
 173 +
 174 +static ssize_t store_fan(struct device *dev,
 175 +                       struct device_attribute *devattr, const char *buf, size_t count)
 176 +{
 177 +       u16 val;
 178 +       struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 179 +       struct i2c_client *client = to_i2c_client(dev);
 180 +       val = simple_strtoul(buf, NULL, 10);
 181 +       gsp_write(client, gsp_sensors[attr->index].reg, val);
 182 +       return count;
 183 +}
 184 +
 185 +static SENSOR_DEVICE_ATTR(temp0_input, S_IRUGO, show_adc, NULL, 0);
 186 +static SENSOR_DEVICE_ATTR(temp0_label, S_IRUGO, show_label, NULL, 0);
 187 +
 188 +static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_adc, NULL, 1);
 189 +static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL, 1);
 190 +static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_adc, NULL, 2);
 191 +static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_label, NULL, 2);
 192 +static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_adc, NULL, 3);
 193 +static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_label, NULL, 3);
 194 +static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_adc, NULL, 4);
 195 +static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 4);
 196 +static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_adc, NULL, 5);
 197 +static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL, 5);
 198 +static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_adc, NULL, 6);
 199 +static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL, 6);
 200 +static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_adc, NULL, 7);
 201 +static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL, 7);
 202 +static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_adc, NULL, 8);
 203 +static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 8);
 204 +static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_adc, NULL, 9);
 205 +static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 9);
 206 +static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, show_adc, NULL, 10);
 207 +static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 10);
 208 +static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, show_adc, NULL, 11);
 209 +static SENSOR_DEVICE_ATTR(in10_label, S_IRUGO, show_label, NULL, 11);
 210 +static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, show_adc, NULL, 12);
 211 +static SENSOR_DEVICE_ATTR(in11_label, S_IRUGO, show_label, NULL, 12);
 212 +static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, show_adc, NULL, 13);
 213 +static SENSOR_DEVICE_ATTR(in12_label, S_IRUGO, show_label, NULL, 13);
 214 +
 215 +static SENSOR_DEVICE_ATTR(fan0_point0, S_IRUGO | S_IWUSR, show_adc, store_fan, 14);
 216 +static SENSOR_DEVICE_ATTR(fan0_point1, S_IRUGO | S_IWUSR, show_adc, store_fan, 15);
 217 +static SENSOR_DEVICE_ATTR(fan0_point2, S_IRUGO | S_IWUSR, show_adc, store_fan, 16);
 218 +static SENSOR_DEVICE_ATTR(fan0_point3, S_IRUGO | S_IWUSR, show_adc, store_fan, 17);
 219 +static SENSOR_DEVICE_ATTR(fan0_point4, S_IRUGO | S_IWUSR, show_adc, store_fan, 18);
 220 +static SENSOR_DEVICE_ATTR(fan0_point5, S_IRUGO | S_IWUSR, show_adc, store_fan, 19);
 221 +
 222 +static struct attribute *gsp_attributes[] = {
 223 +       &sensor_dev_attr_temp0_input.dev_attr.attr,
 224 +       &sensor_dev_attr_in0_input.dev_attr.attr,
 225 +       &sensor_dev_attr_in1_input.dev_attr.attr,
 226 +       &sensor_dev_attr_in2_input.dev_attr.attr,
 227 +       &sensor_dev_attr_in3_input.dev_attr.attr,
 228 +       &sensor_dev_attr_in4_input.dev_attr.attr,
 229 +       &sensor_dev_attr_in5_input.dev_attr.attr,
 230 +       &sensor_dev_attr_in6_input.dev_attr.attr,
 231 +       &sensor_dev_attr_in7_input.dev_attr.attr,
 232 +       &sensor_dev_attr_in8_input.dev_attr.attr,
 233 +       &sensor_dev_attr_in9_input.dev_attr.attr,
 234 +       &sensor_dev_attr_in10_input.dev_attr.attr,
 235 +       &sensor_dev_attr_in11_input.dev_attr.attr,
 236 +       &sensor_dev_attr_in12_input.dev_attr.attr,
 237 +
 238 +       &sensor_dev_attr_temp0_label.dev_attr.attr,
 239 +       &sensor_dev_attr_in0_label.dev_attr.attr,
 240 +       &sensor_dev_attr_in1_label.dev_attr.attr,
 241 +       &sensor_dev_attr_in2_label.dev_attr.attr,
 242 +       &sensor_dev_attr_in3_label.dev_attr.attr,
 243 +       &sensor_dev_attr_in4_label.dev_attr.attr,
 244 +       &sensor_dev_attr_in5_label.dev_attr.attr,
 245 +       &sensor_dev_attr_in6_label.dev_attr.attr,
 246 +       &sensor_dev_attr_in7_label.dev_attr.attr,
 247 +       &sensor_dev_attr_in8_label.dev_attr.attr,
 248 +       &sensor_dev_attr_in9_label.dev_attr.attr,
 249 +       &sensor_dev_attr_in10_label.dev_attr.attr,
 250 +       &sensor_dev_attr_in11_label.dev_attr.attr,
 251 +       &sensor_dev_attr_in12_label.dev_attr.attr,
 252 +
 253 +       &sensor_dev_attr_fan0_point0.dev_attr.attr,
 254 +       &sensor_dev_attr_fan0_point1.dev_attr.attr,
 255 +       &sensor_dev_attr_fan0_point2.dev_attr.attr,
 256 +       &sensor_dev_attr_fan0_point3.dev_attr.attr,
 257 +       &sensor_dev_attr_fan0_point4.dev_attr.attr,
 258 +       &sensor_dev_attr_fan0_point5.dev_attr.attr,
 259 +       NULL
 260 +};
 261 +
 262 +
 263 +static int gsp_probe(struct i2c_client *client,
 264 +                        const struct i2c_device_id *id)
 265 +{
 266 +       struct i2c_adapter *adapter = client->adapter;
 267 +       struct gsp_data *data;
 268 +       int err;
 269 +
 270 +       if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 271 +                                       I2C_FUNC_SMBUS_WORD_DATA)) {
 272 +               err = -EOPNOTSUPP;
 273 +               goto exit;
 274 +       }
 275 +
 276 +       if (!(data = kzalloc(sizeof(struct gsp_data), GFP_KERNEL))) {
 277 +               err = -ENOMEM;
 278 +               goto exit;
 279 +       }
 280 +
 281 +       i2c_set_clientdata(client, data);
 282 +
 283 +       data->type = id->driver_data;
 284 +
 285 +       switch (data->type) {
 286 +       case 0:
 287 +               data->attrs.attrs = gsp_attributes;
 288 +               break;
 289 +       }
 290 +
 291 +       dev_info(&client->dev, "%s chip found\n", client->name);
 292 +
 293 +       /* Register sysfs hooks */
 294 +       if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
 295 +               goto exit_free;
 296 +
 297 +       data->hwmon_dev = hwmon_device_register(&client->dev);
 298 +       if (IS_ERR(data->hwmon_dev)) {
 299 +               err = PTR_ERR(data->hwmon_dev);
 300 +               goto exit_remove;
 301 +       }
 302 +
 303 +       return 0;
 304 +
 305 +exit_remove:
 306 +       sysfs_remove_group(&client->dev.kobj, &data->attrs);
 307 +exit_free:
 308 +       kfree(data);
 309 +exit:
 310 +       return err;
 311 +}
 312 +
 313 +static int gsp_remove(struct i2c_client *client)
 314 +{
 315 +       struct gsp_data *data = i2c_get_clientdata(client);
 316 +       hwmon_device_unregister(data->hwmon_dev);
 317 +       sysfs_remove_group(&client->dev.kobj, &data->attrs);
 318 +       kfree(data);
 319 +       return 0;
 320 +}
 321 +
 322 +static int __init gsp_init(void)
 323 +{
 324 +       return i2c_add_driver(&gsp_driver);
 325 +}
 326 +
 327 +static void __exit gsp_exit(void)
 328 +{
 329 +       i2c_del_driver(&gsp_driver);
 330 +}
 331 +
 332 +module_init(gsp_init);
 333 +module_exit(gsp_exit);
 334 +
 335 +MODULE_AUTHOR("Chris Lang <clang@gateworks.com>");
 336 +MODULE_DESCRIPTION("GSP HWMON driver");
 337 +MODULE_LICENSE("GPL");
 338 +MODULE_VERSION(DRV_VERSION);
 339 +