GMT G781 is a ADM1032-compatible temperature sensor chip.
Add support to the LM90 driver.
Cc: Mike Gorchak <lestat@xxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
v2:
- Drop device ID 0x03, since its existence is not confirmed.
Instead, accept device ID 0x01 on both 0x4c and 0x4d.
- Drop referring to G781-1; we don't do that for other chips either,
and it is not clear if it is even possible to distinguish G781 from G781-1.
- Add G781 information to Kconfig, lm90 documentation
- Mention G781 support in lm90.c file comments
- Modify formatting to better match file formatting
Documentation/hwmon/lm90 | 5 +++++
drivers/hwmon/Kconfig | 3 ++-
drivers/hwmon/lm90.c | 19 ++++++++++++++++++-
3 files changed, 25 insertions(+), 2 deletions(-)
diff --git a/Documentation/hwmon/lm90 b/Documentation/hwmon/lm90
index 9cd14cfe..d8f1e66 100644
--- a/Documentation/hwmon/lm90
+++ b/Documentation/hwmon/lm90
@@ -118,6 +118,11 @@ Supported chips:
Addresses scanned: I2C 0x48 through 0x4F
Datasheet: Publicly available at NXP website
http://ics.nxp.com/products/interface/datasheet/sa56004x.pdf
+ * GMT G781
+ Prefix: 'g781'
+ Addresses scanned: I2C 0x4c, 0x4d
+ Datasheet: Publicly available, for example from
+ http://www.datasheetarchive.com/G781-datasheet.html
Author: Jean Delvare <khali@xxxxxxxxxxxx>
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 0226040..930428c 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -647,7 +647,8 @@ config SENSORS_LM90
LM86, LM89 and LM99, Analog Devices ADM1032, ADT7461, and ADT7461A,
Maxim MAX6646, MAX6647, MAX6648, MAX6649, MAX6657, MAX6658, MAX6659,
MAX6680, MAX6681, MAX6692, MAX6695, MAX6696, ON Semiconductor NCT1008,
- Winbond/Nuvoton W83L771W/G/AWG/ASG and Philips SA56004 sensor chips.
+ Winbond/Nuvoton W83L771W/G/AWG/ASG, Philips SA56004, and GMT G781
+ sensor chips.
This driver can also be built as a module. If so, the module
will be called lm90.
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 2e207de..0af8f8f 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -57,6 +57,9 @@
* This driver also supports the SA56004 from Philips. This device is
* pin-compatible with the LM86, the ED/EDP parts are also address-compatible.
*
+ * This driver also supports the G781 from GMT. This device is compatible
+ * with the ADM1032.
+ *
* Since the LM90 was the first chipset supported by this driver, most
* comments will refer to this chipset, but are actually general and
* concern all supported chipsets, unless mentioned otherwise.
@@ -107,7 +110,7 @@ static const unsigned short normal_i2c[] = {
0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
- max6646, w83l771, max6696, sa56004 };
+ max6646, w83l771, max6696, sa56004, g781 };
/*
* The LM90 registers
@@ -184,6 +187,7 @@ static const struct i2c_device_id lm90_id[] = {
{ "adm1032", adm1032 },
{ "adt7461", adt7461 },
{ "adt7461a", adt7461 },
+ { "g781", g781 },
{ "lm90", lm90 },
{ "lm86", lm86 },
{ "lm89", lm86 },
@@ -229,6 +233,12 @@ static const struct lm90_params lm90_params[] = {
.alert_alarms = 0x7c,
.max_convrate = 10,
},
+ [g781] = {
+ .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
+ | LM90_HAVE_BROKEN_ALERT,
+ .alert_alarms = 0x7c,
+ .max_convrate = 8,
+ },
[lm86] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
.alert_alarms = 0x7b,
@@ -1291,6 +1301,13 @@ static int lm90_detect(struct i2c_client *client,
&& convrate <= 0x09) {
name = "sa56004";
}
+ } else
+ if ((address == 0x4C || address == 0x4D)
+ && man_id == 0x47) { /* GMT */
+ if (chip_id == 0x01 /* G781 */
+ && (config1 & 0x3F) == 0x00
+ && convrate <= 0x08)
+ name = "g781";
}
if (!name) { /* identification failed */
--
1.7.5.4
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