linux-stable.git/drivers/w1, branch linux-2.6.27.y

w1: w1 temp calculation overflow fix

2009-02-17T17:46:17+00:00

commit 507e2fbaaacb6f164b4125b87c5002f95143174b upstream.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=12646

When the temperature exceeds 32767 milli-degrees the temperature overflows
to -32768 millidegrees.  These are bothe well within the -55 - +125 degree
range for the sensor.

Fix overflow in left-shift of a u8.

Signed-off-by: Ian Dall 
Signed-off-by: Evgeniy Polyakov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

w1/ds2482: Convert to a new-style driver

2008-07-16T17:30:07+00:00

The new-style ds2482 driver implements the optional detect() callback
to cover the use cases of the legacy driver. I'm curious if anyone
really needs this though, so it might be removed in the feature.

Signed-off-by: Jean Delvare

drivers: replace remaining FUNCTION occurrences

2008-04-30T15:29:53+00:00

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison 
Cc: Ben Dooks 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ds1wm: report bus reset error

2008-03-05T00:35:12+00:00

The patch replaces dev_dbg() by dev_err(), so the user could actually see the
error, instead of wondering why w1 doesn't work.  The root cause of the bus
reset error isn't yet debugged though, but this sometimes happens on iPaq
H5555.

And while I'm at it, some cosmetic cleanups also made (few lines were using
spaces instead of tabs).

Signed-off-by: Anton Vorontsov 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ds1wm: should check for IS_ERR(clk) instead of NULL

2008-03-05T00:35:12+00:00

On the error condition clk_get() returns ERR_PTR(..), so checking for NULL
doesn't work.  ds1wm module causes a kernel oops when ds1wm clock isn't
registered.

This patch converts NULL check to IS_ERR(), plus uses PTR_ERR()
for the return code.

Signed-off-by: Anton Vorontsov 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

DS1WM: decouple host IRQ and INTR active state settings

2008-02-07T16:42:06+00:00

The DS1WM driver incorrectly infers the IAS bit (1-wire interrupt active
high) from IRQ settings.  There are devices that have IAS=0 but still need
the IRQ to trigger on a rising edge.  With this patch, machines with DS1WM
that need IAS=1 have to set .active_high=1 in the ds1wm_platform_data.

Signed-off-by: Philipp Zabel 
Acked-by: Evgeniy Polyakov 
Acked-by: Matt Reimer 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

w1-gpio: add GPIO w1 bus master driver

2008-02-06T18:41:15+00:00

Add a GPIO 1-wire bus master driver.  The driver used the GPIO API to
control the wire and the GPIO pin can be specified using platform data
similar to i2c-gpio.  The driver was tested with AT91SAM9260 + DS2401.

Signed-off-by: Ville Syrjala 
Cc: Evgeniy Polyakov 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

W1: w1_therm.c standardize units to millidegrees C

2008-02-06T18:41:10+00:00

Standardize the temperature units to millidegrees C for the two sensor
conversion routines.  Previously the routines were,

w1_DS18B20_convert_temp degrees C
w1_DS18S20_convert_temp millidegrees C

Unfortunately this will break any program using the ds18b20 value as it
will now be 1000 times bigger.  Fortunately there can't be that many users
out there, or some of these bugs will have been fixed by now, such as the
negative C error (see previous patch) that makes me think the ds18b20 is
the better choice to change because of the current bugs.

Signed-off-by: David Fries 
Cc: Evgeniy Polyakov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

w1: remove unused and confusing variable.