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-rw-r--r--Documentation/misc-devices/max68756
-rw-r--r--drivers/misc/eeprom/max6875.c29
2 files changed, 9 insertions, 26 deletions
diff --git a/Documentation/misc-devices/max6875 b/Documentation/misc-devices/max6875
index 10ca43cd1a72..1e89ee3ccc1b 100644
--- a/Documentation/misc-devices/max6875
+++ b/Documentation/misc-devices/max6875
@@ -42,10 +42,12 @@ General Remarks
42 42
43Valid addresses for the MAX6875 are 0x50 and 0x52. 43Valid addresses for the MAX6875 are 0x50 and 0x52.
44Valid addresses for the MAX6874 are 0x50, 0x52, 0x54 and 0x56. 44Valid addresses for the MAX6874 are 0x50, 0x52, 0x54 and 0x56.
45The driver does not probe any address, so you must force the address. 45The driver does not probe any address, so you explicitly instantiate the
46devices.
46 47
47Example: 48Example:
48$ modprobe max6875 force=0,0x50 49$ modprobe max6875
50$ echo max6875 0x50 > /sys/bus/i2c/devices/i2c-0/new_device
49 51
50The MAX6874/MAX6875 ignores address bit 0, so this driver attaches to multiple 52The MAX6874/MAX6875 ignores address bit 0, so this driver attaches to multiple
51addresses. For example, for address 0x50, it also reserves 0x51. 53addresses. For example, for address 0x50, it also reserves 0x51.
diff --git a/drivers/misc/eeprom/max6875.c b/drivers/misc/eeprom/max6875.c
index 3c0c58eed347..5a6b2bce8ad5 100644
--- a/drivers/misc/eeprom/max6875.c
+++ b/drivers/misc/eeprom/max6875.c
@@ -33,12 +33,6 @@
33#include <linux/i2c.h> 33#include <linux/i2c.h>
34#include <linux/mutex.h> 34#include <linux/mutex.h>
35 35
36/* Do not scan - the MAX6875 access method will write to some EEPROM chips */
37static const unsigned short normal_i2c[] = { I2C_CLIENT_END };
38
39/* Insmod parameters */
40I2C_CLIENT_INSMOD_1(max6875);
41
42/* The MAX6875 can only read/write 16 bytes at a time */ 36/* The MAX6875 can only read/write 16 bytes at a time */
43#define SLICE_SIZE 16 37#define SLICE_SIZE 16
44#define SLICE_BITS 4 38#define SLICE_BITS 4
@@ -146,31 +140,21 @@ static struct bin_attribute user_eeprom_attr = {
146 .read = max6875_read, 140 .read = max6875_read,
147}; 141};
148 142
149/* Return 0 if detection is successful, -ENODEV otherwise */ 143static int max6875_probe(struct i2c_client *client,
150static int max6875_detect(struct i2c_client *client, int kind, 144 const struct i2c_device_id *id)
151 struct i2c_board_info *info)
152{ 145{
153 struct i2c_adapter *adapter = client->adapter; 146 struct i2c_adapter *adapter = client->adapter;
147 struct max6875_data *data;
148 int err;
154 149
155 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE_DATA 150 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE_DATA
156 | I2C_FUNC_SMBUS_READ_BYTE)) 151 | I2C_FUNC_SMBUS_READ_BYTE))
157 return -ENODEV; 152 return -ENODEV;
158 153
159 /* Only check even addresses */ 154 /* Only bind to even addresses */
160 if (client->addr & 1) 155 if (client->addr & 1)
161 return -ENODEV; 156 return -ENODEV;
162 157
163 strlcpy(info->type, "max6875", I2C_NAME_SIZE);
164
165 return 0;
166}
167
168static int max6875_probe(struct i2c_client *client,
169 const struct i2c_device_id *id)
170{
171 struct max6875_data *data;
172 int err;
173
174 if (!(data = kzalloc(sizeof(struct max6875_data), GFP_KERNEL))) 158 if (!(data = kzalloc(sizeof(struct max6875_data), GFP_KERNEL)))
175 return -ENOMEM; 159 return -ENOMEM;
176 160
@@ -222,9 +206,6 @@ static struct i2c_driver max6875_driver = {
222 .probe = max6875_probe, 206 .probe = max6875_probe,
223 .remove = max6875_remove, 207 .remove = max6875_remove,
224 .id_table = max6875_id, 208 .id_table = max6875_id,
225
226 .detect = max6875_detect,
227 .address_data = &addr_data,
228}; 209};
229 210
230static int __init max6875_init(void) 211static int __init max6875_init(void)