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Diffstat (limited to 'drivers/hwmon/w83l785ts.c')
-rw-r--r--drivers/hwmon/w83l785ts.c82
1 files changed, 26 insertions, 56 deletions
diff --git a/drivers/hwmon/w83l785ts.c b/drivers/hwmon/w83l785ts.c
index ea295b9fc4f4..20781def65ed 100644
--- a/drivers/hwmon/w83l785ts.c
+++ b/drivers/hwmon/w83l785ts.c
@@ -1,7 +1,7 @@
1/* 1/*
2 * w83l785ts.c - Part of lm_sensors, Linux kernel modules for hardware 2 * w83l785ts.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring 3 * monitoring
4 * Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org> 4 * Copyright (C) 2003-2009 Jean Delvare <khali@linux-fr.org>
5 * 5 *
6 * Inspired from the lm83 driver. The W83L785TS-S is a sensor chip made 6 * Inspired from the lm83 driver. The W83L785TS-S is a sensor chip made
7 * by Winbond. It reports a single external temperature with a 1 deg 7 * by Winbond. It reports a single external temperature with a 1 deg
@@ -52,12 +52,6 @@
52static const unsigned short normal_i2c[] = { 0x2e, I2C_CLIENT_END }; 52static const unsigned short normal_i2c[] = { 0x2e, I2C_CLIENT_END };
53 53
54/* 54/*
55 * Insmod parameters
56 */
57
58I2C_CLIENT_INSMOD_1(w83l785ts);
59
60/*
61 * The W83L785TS-S registers 55 * The W83L785TS-S registers
62 * Manufacturer ID is 0x5CA3 for Winbond. 56 * Manufacturer ID is 0x5CA3 for Winbond.
63 */ 57 */
@@ -83,7 +77,7 @@ I2C_CLIENT_INSMOD_1(w83l785ts);
83 77
84static int w83l785ts_probe(struct i2c_client *client, 78static int w83l785ts_probe(struct i2c_client *client,
85 const struct i2c_device_id *id); 79 const struct i2c_device_id *id);
86static int w83l785ts_detect(struct i2c_client *client, int kind, 80static int w83l785ts_detect(struct i2c_client *client,
87 struct i2c_board_info *info); 81 struct i2c_board_info *info);
88static int w83l785ts_remove(struct i2c_client *client); 82static int w83l785ts_remove(struct i2c_client *client);
89static u8 w83l785ts_read_value(struct i2c_client *client, u8 reg, u8 defval); 83static u8 w83l785ts_read_value(struct i2c_client *client, u8 reg, u8 defval);
@@ -94,7 +88,7 @@ static struct w83l785ts_data *w83l785ts_update_device(struct device *dev);
94 */ 88 */
95 89
96static const struct i2c_device_id w83l785ts_id[] = { 90static const struct i2c_device_id w83l785ts_id[] = {
97 { "w83l785ts", w83l785ts }, 91 { "w83l785ts", 0 },
98 { } 92 { }
99}; 93};
100MODULE_DEVICE_TABLE(i2c, w83l785ts_id); 94MODULE_DEVICE_TABLE(i2c, w83l785ts_id);
@@ -108,7 +102,7 @@ static struct i2c_driver w83l785ts_driver = {
108 .remove = w83l785ts_remove, 102 .remove = w83l785ts_remove,
109 .id_table = w83l785ts_id, 103 .id_table = w83l785ts_id,
110 .detect = w83l785ts_detect, 104 .detect = w83l785ts_detect,
111 .address_data = &addr_data, 105 .address_list = normal_i2c,
112}; 106};
113 107
114/* 108/*
@@ -146,60 +140,36 @@ static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, 1);
146 */ 140 */
147 141
148/* Return 0 if detection is successful, -ENODEV otherwise */ 142/* Return 0 if detection is successful, -ENODEV otherwise */
149static int w83l785ts_detect(struct i2c_client *new_client, int kind, 143static int w83l785ts_detect(struct i2c_client *client,
150 struct i2c_board_info *info) 144 struct i2c_board_info *info)
151{ 145{
152 struct i2c_adapter *adapter = new_client->adapter; 146 struct i2c_adapter *adapter = client->adapter;
147 u16 man_id;
148 u8 chip_id;
153 149
154 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 150 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
155 return -ENODEV; 151 return -ENODEV;
156 152
157 /* 153 /* detection */
158 * Now we do the remaining detection. A negative kind means that 154 if ((w83l785ts_read_value(client, W83L785TS_REG_CONFIG, 0) & 0x80)
159 * the driver was loaded with no force parameter (default), so we 155 || (w83l785ts_read_value(client, W83L785TS_REG_TYPE, 0) & 0xFC)) {
160 * must both detect and identify the chip (actually there is only 156 dev_dbg(&adapter->dev,
161 * one possible kind of chip for now, W83L785TS-S). A zero kind means 157 "W83L785TS-S detection failed at 0x%02x\n",
162 * that the driver was loaded with the force parameter, the detection 158 client->addr);
163 * step shall be skipped. A positive kind means that the driver 159 return -ENODEV;
164 * was loaded with the force parameter and a given kind of chip is
165 * requested, so both the detection and the identification steps
166 * are skipped.
167 */
168 if (kind < 0) { /* detection */
169 if (((w83l785ts_read_value(new_client,
170 W83L785TS_REG_CONFIG, 0) & 0x80) != 0x00)
171 || ((w83l785ts_read_value(new_client,
172 W83L785TS_REG_TYPE, 0) & 0xFC) != 0x00)) {
173 dev_dbg(&adapter->dev,
174 "W83L785TS-S detection failed at 0x%02x.\n",
175 new_client->addr);
176 return -ENODEV;
177 }
178 } 160 }
179 161
180 if (kind <= 0) { /* identification */ 162 /* Identification */
181 u16 man_id; 163 man_id = (w83l785ts_read_value(client, W83L785TS_REG_MAN_ID1, 0) << 8)
182 u8 chip_id; 164 + w83l785ts_read_value(client, W83L785TS_REG_MAN_ID2, 0);
183 165 chip_id = w83l785ts_read_value(client, W83L785TS_REG_CHIP_ID, 0);
184 man_id = (w83l785ts_read_value(new_client, 166
185 W83L785TS_REG_MAN_ID1, 0) << 8) + 167 if (man_id != 0x5CA3 /* Winbond */
186 w83l785ts_read_value(new_client, 168 || chip_id != 0x70) { /* W83L785TS-S */
187 W83L785TS_REG_MAN_ID2, 0); 169 dev_dbg(&adapter->dev,
188 chip_id = w83l785ts_read_value(new_client, 170 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n",
189 W83L785TS_REG_CHIP_ID, 0); 171 man_id, chip_id);
190 172 return -ENODEV;
191 if (man_id == 0x5CA3) { /* Winbond */
192 if (chip_id == 0x70) { /* W83L785TS-S */
193 kind = w83l785ts;
194 }
195 }
196
197 if (kind <= 0) { /* identification failed */
198 dev_info(&adapter->dev,
199 "Unsupported chip (man_id=0x%04X, "
200 "chip_id=0x%02X).\n", man_id, chip_id);
201 return -ENODEV;
202 }
203 } 173 }
204 174
205 strlcpy(info->type, "w83l785ts", I2C_NAME_SIZE); 175 strlcpy(info->type, "w83l785ts", I2C_NAME_SIZE);