From ff71c182f461da5ae9d2d65f8a63f5a9193b9be1 Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Sun, 28 Aug 2011 13:01:49 -0700 Subject: [PATCH 1/3] hwmon: (max16065) Fix current calculation Current calculation is completely wrong. Add missing brackets to fix it. Signed-off-by: Guenter Roeck Acked-by: Jean Delvare Cc: stable@kernel.org # 3.0+ --- drivers/hwmon/max16065.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwmon/max16065.c b/drivers/hwmon/max16065.c index d94a24fdf4ba..dd2d7b9620c2 100644 --- a/drivers/hwmon/max16065.c +++ b/drivers/hwmon/max16065.c @@ -124,7 +124,7 @@ static inline int MV_TO_LIMIT(int mv, int range) static inline int ADC_TO_CURR(int adc, int gain) { - return adc * 1400000 / gain * 255; + return adc * 1400000 / (gain * 255); } /* From d91aae1e52e5289a94f4ddff968decfc8d37271e Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Mon, 29 Aug 2011 22:53:20 -0700 Subject: [PATCH 2/3] hwmon: (max16065) Add chip access warning to documentation The chips supported by the max16065 driver should not be accessed using direct i2ctools commands. Add warning to driver documentation to alert users. Signed-off-by: Guenter Roeck Acked-by: Jean Delvare --- Documentation/hwmon/max16065 | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/hwmon/max16065 b/Documentation/hwmon/max16065 index 44b4f61e04f9..c11f64a1f2ad 100644 --- a/Documentation/hwmon/max16065 +++ b/Documentation/hwmon/max16065 @@ -62,6 +62,13 @@ can be safely used to identify the chip. You will have to instantiate the devices explicitly. Please see Documentation/i2c/instantiating-devices for details. +WARNING: Do not access chip registers using the i2cdump command, and do not use +any of the i2ctools commands on a command register (0xa5 to 0xac). The chips +supported by this driver interpret any access to a command register (including +read commands) as request to execute the command in question. This may result in +power loss, board resets, and/or Flash corruption. Worst case, your board may +turn into a brick. + Sysfs entries ------------- From f020b007d5dd24597f5e985a6309bcb8393797ed Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Wed, 31 Aug 2011 11:53:41 -0400 Subject: [PATCH 3/3] hwmon: (ucd9000/ucd9200) Optimize array walk Rewrite the loop walking the id array during probe. The new code is better adapted to a null-terminated array, and is also clearer and more efficient than the original. Signed-off-by: Jean Delvare Cc: Axel Lin Cc: Guenter Roeck Signed-off-by: Guenter Roeck --- drivers/hwmon/pmbus/ucd9000.c | 6 ++---- drivers/hwmon/pmbus/ucd9200.c | 6 ++---- 2 files changed, 4 insertions(+), 8 deletions(-) diff --git a/drivers/hwmon/pmbus/ucd9000.c b/drivers/hwmon/pmbus/ucd9000.c index ace1c7319734..d0ddb60155c9 100644 --- a/drivers/hwmon/pmbus/ucd9000.c +++ b/drivers/hwmon/pmbus/ucd9000.c @@ -141,13 +141,11 @@ static int ucd9000_probe(struct i2c_client *client, block_buffer[ret] = '\0'; dev_info(&client->dev, "Device ID %s\n", block_buffer); - mid = NULL; - for (i = 0; i < ARRAY_SIZE(ucd9000_id); i++) { - mid = &ucd9000_id[i]; + for (mid = ucd9000_id; mid->name[0]; mid++) { if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) break; } - if (!mid || !strlen(mid->name)) { + if (!mid->name[0]) { dev_err(&client->dev, "Unsupported device\n"); return -ENODEV; } diff --git a/drivers/hwmon/pmbus/ucd9200.c b/drivers/hwmon/pmbus/ucd9200.c index ffcc1cf3609d..c65e9da707cc 100644 --- a/drivers/hwmon/pmbus/ucd9200.c +++ b/drivers/hwmon/pmbus/ucd9200.c @@ -68,13 +68,11 @@ static int ucd9200_probe(struct i2c_client *client, block_buffer[ret] = '\0'; dev_info(&client->dev, "Device ID %s\n", block_buffer); - mid = NULL; - for (i = 0; i < ARRAY_SIZE(ucd9200_id); i++) { - mid = &ucd9200_id[i]; + for (mid = ucd9200_id; mid->name[0]; mid++) { if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) break; } - if (!mid || !strlen(mid->name)) { + if (!mid->name[0]) { dev_err(&client->dev, "Unsupported device\n"); return -ENODEV; }