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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/lm83.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/lm83.c')
-rw-r--r--drivers/hwmon/lm83.c81
1 files changed, 26 insertions, 55 deletions
diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c
index e59e2d1f080c..08b03e6ed0b7 100644
--- a/drivers/hwmon/lm83.c
+++ b/drivers/hwmon/lm83.c
@@ -1,7 +1,7 @@
/*
* lm83.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
- * Copyright (C) 2003-2008 Jean Delvare <khali@linux-fr.org>
+ * Copyright (C) 2003-2009 Jean Delvare <khali@linux-fr.org>
*
* Heavily inspired from the lm78, lm75 and adm1021 drivers. The LM83 is
* a sensor chip made by National Semiconductor. It reports up to four
@@ -295,69 +295,40 @@ static int lm83_detect(struct i2c_client *new_client, int kind,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = new_client->adapter;
- const char *name = "";
+ const char *name;
+ u8 man_id, chip_id;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
- /* Now we do the detection and identification. A negative kind
- * means that the driver was loaded with no force parameter
- * (default), so we must both detect and identify the chip
- * (actually there is only one possible kind of chip for now, LM83).
- * A zero kind means that the driver was loaded with the force
- * parameter, the detection step shall be skipped. A positive kind
- * means that the driver was loaded with the force parameter and a
- * given kind of chip is requested, so both the detection and the
- * identification steps are skipped. */
-
- /* Default to an LM83 if forced */
- if (kind == 0)
- kind = lm83;
-
- if (kind < 0) { /* detection */
- if (((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS1)
- & 0xA8) != 0x00) ||
- ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS2)
- & 0x48) != 0x00) ||
- ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG)
- & 0x41) != 0x00)) {
- dev_dbg(&adapter->dev,
- "LM83 detection failed at 0x%02x.\n",
- new_client->addr);
- return -ENODEV;
- }
+ /* Detection */
+ if ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS1) & 0xA8) ||
+ (i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS2) & 0x48) ||
+ (i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG) & 0x41)) {
+ dev_dbg(&adapter->dev, "LM83 detection failed at 0x%02x\n",
+ new_client->addr);
+ return -ENODEV;
}
- if (kind <= 0) { /* identification */
- u8 man_id, chip_id;
-
- man_id = i2c_smbus_read_byte_data(new_client,
- LM83_REG_R_MAN_ID);
- chip_id = i2c_smbus_read_byte_data(new_client,
- LM83_REG_R_CHIP_ID);
-
- if (man_id == 0x01) { /* National Semiconductor */
- if (chip_id == 0x03) {
- kind = lm83;
- } else
- if (chip_id == 0x01) {
- kind = lm82;
- }
- }
-
- if (kind <= 0) { /* identification failed */
- dev_info(&adapter->dev,
- "Unsupported chip (man_id=0x%02X, "
- "chip_id=0x%02X).\n", man_id, chip_id);
- return -ENODEV;
- }
- }
+ /* Identification */
+ man_id = i2c_smbus_read_byte_data(new_client, LM83_REG_R_MAN_ID);
+ if (man_id != 0x01) /* National Semiconductor */
+ return -ENODEV;
- if (kind == lm83) {
+ chip_id = i2c_smbus_read_byte_data(new_client, LM83_REG_R_CHIP_ID);
+ switch (chip_id) {
+ case 0x03:
name = "lm83";
- } else
- if (kind == lm82) {
+ break;
+ case 0x01:
name = "lm82";
+ break;
+ default:
+ /* identification failed */
+ dev_info(&adapter->dev,
+ "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
+ man_id, chip_id);
+ return -ENODEV;
}
strlcpy(info->type, name, I2C_NAME_SIZE);