/*
* lm90.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
- * Copyright (C) 2003 Jean Delvare <khali@linux-fr.org>
+ * Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
*
* Based on the lm83 driver. The LM90 is a sensor chip made by National
* Semiconductor. It reports up to two temperatures (its own plus up to
* obtained from National's website at:
* http://www.national.com/pf/LM/LM90.html
*
+ * This driver also supports the LM89 and LM99, two other sensor chips
+ * made by National Semiconductor. Both have an increased remote
+ * temperature measurement accuracy (1 degree), and the LM99
+ * additionally shifts remote temperatures (measured and limits) by 16
+ * degrees, which allows for higher temperatures measurement. The
+ * driver doesn't handle it since it can be done easily in user-space.
+ * Complete datasheets can be obtained from National's website at:
+ * http://www.national.com/pf/LM/LM89.html
+ * http://www.national.com/pf/LM/LM99.html
+ * Note that there is no way to differenciate between both chips.
+ *
+ * This driver also supports the LM86, another sensor chip made by
+ * National Semiconductor. It is exactly similar to the LM90 except it
+ * has a higher accuracy.
+ * Complete datasheet can be obtained from National's website at:
+ * http://www.national.com/pf/LM/LM86.html
+ *
* This driver also supports the ADM1032, a sensor chip made by Analog
* Devices. That chip is similar to the LM90, with a few differences
* that are not handled by this driver. Complete datasheet can be
* obtained from Analog's website at:
* http://products.analog.com/products/info.asp?product=ADM1032
+ * Among others, it has a higher accuracy than the LM90, much like the
+ * LM86 does.
+ *
+ * This driver also supports the MAX6657 and MAX6658, sensor chips made
+ * by Maxim. These chips are similar to the LM86. Complete datasheet
+ * can be obtained at Maxim's website at:
+ * http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578
+ * Note that there is no way to differenciate between both chips (but
+ * no need either).
*
* Since the LM90 was the first chipset supported by this driver, most
* comments will refer to this chipset, but are actually general and
/*
* Addresses to scan
* Address is fully defined internally and cannot be changed.
+ * LM86, LM89, LM90, LM99, ADM1032, MAX6657 and MAX6658 have address 0x4c.
+ * LM89-1, and LM99-1 have address 0x4d.
*/
-static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
+static unsigned short normal_i2c[] = { 0x4c, 0x4d, I2C_CLIENT_END };
static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
* Insmod parameters
*/
-SENSORS_INSMOD_2(lm90, adm1032);
+SENSORS_INSMOD_5(lm90, adm1032, lm99, lm86, max6657);
/*
* The LM90 registers
static int lm90_attach_adapter(struct i2c_adapter *adapter)
{
- if (!(adapter->class & I2C_ADAP_CLASS_SMBUS))
+ if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_detect(adapter, &addr_data, lm90_detect);
}
struct lm90_data *data;
int err = 0;
const char *name = "";
- u8 reg_config1=0, reg_convrate=0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
* requested, so both the detection and the identification steps
* are skipped.
*/
- if (kind < 0) { /* detection */
- reg_config1 = i2c_smbus_read_byte_data(new_client,
- LM90_REG_R_CONFIG1);
- reg_convrate = i2c_smbus_read_byte_data(new_client,
- LM90_REG_R_CONVRATE);
- if ((reg_config1 & 0x2A) != 0x00
- || reg_convrate > 0x0A) {
- dev_dbg(&adapter->dev,
- "LM90 detection failed at 0x%02x.\n",
- address);
- goto exit_free;
- }
- }
+ /* Default to an LM90 if forced */
+ if (kind == 0)
+ kind = lm90;
- if (kind <= 0) { /* identification */
- u8 man_id, chip_id;
+ if (kind < 0) { /* detection and identification */
+ u8 man_id, chip_id, reg_config1, reg_convrate;
man_id = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_MAN_ID);
chip_id = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CHIP_ID);
+ reg_config1 = i2c_smbus_read_byte_data(new_client,
+ LM90_REG_R_CONFIG1);
+ reg_convrate = i2c_smbus_read_byte_data(new_client,
+ LM90_REG_R_CONVRATE);
if (man_id == 0x01) { /* National Semiconductor */
- if (chip_id >= 0x21 && chip_id < 0x30 /* LM90 */
- && (kind == 0 /* skip detection */
- || ((i2c_smbus_read_byte_data(new_client,
- LM90_REG_R_CONFIG2) & 0xF8) == 0x00
- && reg_convrate <= 0x09))) {
- kind = lm90;
+ u8 reg_config2;
+
+ reg_config2 = i2c_smbus_read_byte_data(new_client,
+ LM90_REG_R_CONFIG2);
+
+ if ((reg_config1 & 0x2A) == 0x00
+ && (reg_config2 & 0xF8) == 0x00
+ && reg_convrate <= 0x09) {
+ if (address == 0x4C
+ && (chip_id & 0xF0) == 0x20) { /* LM90 */
+ kind = lm90;
+ } else
+ if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
+ kind = lm99;
+ } else
+ if (address == 0x4C
+ && (chip_id & 0xF0) == 0x10) { /* LM86 */
+ kind = lm86;
+ }
}
- }
- else if (man_id == 0x41) { /* Analog Devices */
- if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
- && (kind == 0 /* skip detection */
- || (reg_config1 & 0x3F) == 0x00)) {
+ } else
+ if (man_id == 0x41) { /* Analog Devices */
+ if (address == 0x4C
+ && (chip_id & 0xF0) == 0x40 /* ADM1032 */
+ && (reg_config1 & 0x3F) == 0x00
+ && reg_convrate <= 0x0A) {
kind = adm1032;
}
+ } else
+ if (man_id == 0x4D) { /* Maxim */
+ if (address == 0x4C
+ && (reg_config1 & 0x1F) == 0
+ && reg_convrate <= 0x09) {
+ kind = max6657;
+ }
}
if (kind <= 0) { /* identification failed */
name = "lm90";
} else if (kind == adm1032) {
name = "adm1032";
+ } else if (kind == lm99) {
+ name = "lm99";
+ } else if (kind == lm86) {
+ name = "lm86";
+ } else if (kind == max6657) {
+ name = "max6657";
}
/* We can fill in the remaining client fields */
git://git.onelab.eu / linux-2.6.git / blobdiff