[PATCH] lm90: Support the MAX6648/6692 chips

Darrick J. Wong
2009-03-02T21:01:27Z

The max6648 chip has nearly the same register set as the 6657 and
seems to have a working manufacturer/chip id so we can detect it.
This patch adds support for it. Tested on a Nvidia Quadro FX 1500
card.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
---

drivers/hwmon/Kconfig | 4 ++--
drivers/hwmon/lm90.c | 7 ++++++-
2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 8c312c6..7da49d3 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -550,8 +550,8 @@ config SENSORS_LM90
help
If you say yes here you get support for National Semiconductor LM90,
LM86, LM89 and LM99, Analog Devices ADM1032 and ADT7461, and Maxim
- MAX6646, MAX6647, MAX6649, MAX6657, MAX6658, MAX6659, MAX6680 and
- MAX6681 sensor chips.
+ MAX6646, MAX6647, MAX6649, MAX6657, MAX6658, MAX6659, MAX6680,
+ MAX6648, MAX6692 and MAX6681 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 96a7018..1802366 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -776,7 +776,12 @@ static int lm90_detect(struct i2c_client *new_client, int kind,
&& (reg_config1 & 0x3f) == 0x00
&& reg_convrate <= 0x07) {
kind = max6646;
- }
+ } else
+ /* The MAX6648/6692 chips have a working man/chip id
+ * and the same register set as the 6657.
+ */
+ if (chip_id == 0x59 && address == 0x4C)
+ kind = max6657;
}

if (kind <= 0) { /* identification failed */