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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/w83791d.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/w83791d.c')
-rw-r--r--drivers/hwmon/w83791d.c60
1 files changed, 18 insertions, 42 deletions
diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c
index 97851c5ba3a..0410bf12c52 100644
--- a/drivers/hwmon/w83791d.c
+++ b/drivers/hwmon/w83791d.c
@@ -1270,56 +1270,32 @@ static int w83791d_detect(struct i2c_client *client, int kind,
return -ENODEV;
}
- /* The w83791d may be stuck in some other bank than bank 0. This may
- make reading other information impossible. Specify a force=...
- parameter, and the Winbond will be reset to the right bank. */
- if (kind < 0) {
- if (w83791d_read(client, W83791D_REG_CONFIG) & 0x80) {
- return -ENODEV;
- }
- val1 = w83791d_read(client, W83791D_REG_BANK);
- val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
- /* Check for Winbond ID if in bank 0 */
- if (!(val1 & 0x07)) {
- /* yes it is Bank0 */
- if (((!(val1 & 0x80)) && (val2 != 0xa3)) ||
- ((val1 & 0x80) && (val2 != 0x5c))) {
- return -ENODEV;
- }
- }
- /* If Winbond chip, address of chip and W83791D_REG_I2C_ADDR
- should match */
- if (w83791d_read(client, W83791D_REG_I2C_ADDR) != address) {
+ if (w83791d_read(client, W83791D_REG_CONFIG) & 0x80)
+ return -ENODEV;
+
+ val1 = w83791d_read(client, W83791D_REG_BANK);
+ val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
+ /* Check for Winbond ID if in bank 0 */
+ if (!(val1 & 0x07)) {
+ if ((!(val1 & 0x80) && val2 != 0xa3) ||
+ ( (val1 & 0x80) && val2 != 0x5c)) {
return -ENODEV;
}
}
+ /* If Winbond chip, address of chip and W83791D_REG_I2C_ADDR
+ should match */
+ if (w83791d_read(client, W83791D_REG_I2C_ADDR) != address)
+ return -ENODEV;
- /* We either have a force parameter or we have reason to
- believe it is a Winbond chip. Either way, we want bank 0 and
- Vendor ID high byte */
+ /* We want bank 0 and Vendor ID high byte */
val1 = w83791d_read(client, W83791D_REG_BANK) & 0x78;
w83791d_write(client, W83791D_REG_BANK, val1 | 0x80);
/* Verify it is a Winbond w83791d */
- if (kind <= 0) {
- /* get vendor ID */
- val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
- if (val2 != 0x5c) { /* the vendor is NOT Winbond */
- return -ENODEV;
- }
- val1 = w83791d_read(client, W83791D_REG_WCHIPID);
- if (val1 == 0x71) {
- kind = w83791d;
- } else {
- if (kind == 0)
- dev_warn(&adapter->dev,
- "w83791d: Ignoring 'force' parameter "
- "for unknown chip at adapter %d, "
- "address 0x%02x\n",
- i2c_adapter_id(adapter), address);
- return -ENODEV;
- }
- }
+ val1 = w83791d_read(client, W83791D_REG_WCHIPID);
+ val2 = w83791d_read(client, W83791D_REG_CHIPMAN);
+ if (val1 != 0x71 || val2 != 0x5c)
+ return -ENODEV;
strlcpy(info->type, "w83791d", I2C_NAME_SIZE);