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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-09 19:53:11 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-09 19:53:11 -0800
commitf71eaf68406cfee91b6a96bcdf7ce33dc78829c5 (patch)
tree92a1663ae15d521f25849d28ebb4dfad10567892 /drivers/hwmon/w83793.c
parent78f1ae193d1662c22cfebb916e788e1ca896c0fe (diff)
parent54fe4671aa5853ca88da72d67e969a3d8de6dcf6 (diff)
Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: (41 commits) hwmon: (adt7475) Add VID support for the ADT7476 hwmon: (adt7475) Add an entry in MAINTAINERS hwmon: (adt7475) Add support for the ADT7476 hwmon: (adt7475) Voltage attenuators can be bypassed hwmon: (adt7475) Print device information on probe hwmon: (adt7475) Handle alternative pin functions hwmon: (adt7475) Move sysfs files removal to a separate function hwmon: (adt7475) Add support for the ADT7490 hwmon: (adt7475) Improve device detection hwmon: (adt7475) Add missing static marker hwmon: (adt7475) Rework voltage inputs handling hwmon: (adt7475) Implement pwm_use_point2_pwm_at_crit hwmon: (adt7475) New documentation hwmon: (adt7475) Add support for the ADT7473 hwmon: (f71882fg) Add support for the f71889fg (version 2) hwmon: (f71882fg) Fix sysfs file removal hwmon: (f71882fg) Cleanup sysfs attr creation 2/2 hwmon: (f71882fg) Cleanup sysfs attr creation 1/2 hwmon: (thmc50) Stop using I2C_CLIENT_MODULE_PARM hwmon: Add Freescale MC13783 ADC driver ...
Diffstat (limited to 'drivers/hwmon/w83793.c')
-rw-r--r--drivers/hwmon/w83793.c53
1 files changed, 18 insertions, 35 deletions
diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index 47dd398f725..80a2191bf12 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -1164,7 +1164,7 @@ ERROR_SC_0:
static int w83793_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info)
{
- u8 tmp, bank;
+ u8 tmp, bank, chip_id;
struct i2c_adapter *adapter = client->adapter;
unsigned short address = client->addr;
@@ -1174,44 +1174,27 @@ static int w83793_detect(struct i2c_client *client, int kind,
bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
- if (kind < 0) {
- tmp = bank & 0x80 ? 0x5c : 0xa3;
- /* Check Winbond vendor ID */
- if (tmp != i2c_smbus_read_byte_data(client,
- W83793_REG_VENDORID)) {
- pr_debug("w83793: Detection failed at check "
- "vendor id\n");
- return -ENODEV;
- }
-
- /* If Winbond chip, address of chip and W83793_REG_I2C_ADDR
- should match */
- if ((bank & 0x07) == 0
- && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
- (address << 1)) {
- pr_debug("w83793: Detection failed at check "
- "i2c addr\n");
- return -ENODEV;
- }
-
+ tmp = bank & 0x80 ? 0x5c : 0xa3;
+ /* Check Winbond vendor ID */
+ if (tmp != i2c_smbus_read_byte_data(client, W83793_REG_VENDORID)) {
+ pr_debug("w83793: Detection failed at check vendor id\n");
+ return -ENODEV;
}
- /* We have either had a force parameter, or we have already detected the
- Winbond. Determine the chip type now */
-
- if (kind <= 0) {
- if (0x7b == i2c_smbus_read_byte_data(client,
- W83793_REG_CHIPID)) {
- kind = w83793;
- } else {
- if (kind == 0)
- dev_warn(&adapter->dev, "w83793: Ignoring "
- "'force' parameter for unknown chip "
- "at address 0x%02x\n", address);
- return -ENODEV;
- }
+ /* If Winbond chip, address of chip and W83793_REG_I2C_ADDR
+ should match */
+ if ((bank & 0x07) == 0
+ && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
+ (address << 1)) {
+ pr_debug("w83793: Detection failed at check i2c addr\n");
+ return -ENODEV;
}
+ /* Determine the chip type now */
+ chip_id = i2c_smbus_read_byte_data(client, W83793_REG_CHIPID);
+ if (chip_id != 0x7b)
+ return -ENODEV;
+
strlcpy(info->type, "w83793", I2C_NAME_SIZE);
return 0;