linux-toradex.git/drivers/w1/w1.c, branch tegra-11.2.9

w1: don't allow arbitrary users to remove w1 devices

2010-09-30T00:49:05+00:00

The search/pullup/add/remove device attributes were 0666 which would
allow arbitrary users to affect the 1 wire bus.  Change to 0664 to
prevent that.

Signed-off-by: Brian Swetland

sysfs: add struct file* to bin_attr callbacks

2010-05-21T16:37:31+00:00

This allows bin_attr->read,write,mmap callbacks to check file specific data
(such as inode owner) as part of any privilege validation.

Signed-off-by: Chris Wright 
Signed-off-by: Greg Kroah-Hartman

w1: add init/exit macros to w1.c

2010-02-05T11:22:32+00:00

Trivial patch which adds the __init/__exit macros to the module_init/
module_exit functions of

drivers/w1/w1.c

Signed-off-by: Peter Huewe 
Signed-off-by: Jiri Kosina

w1: struct device - replace bus_id with dev_name(), dev_set_name()

2009-01-06T18:44:34+00:00

CC: Evgeniy Polyakov 
Signed-off-by: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

W1: w1.c s/printk/dev_dbg/

2008-10-16T18:21:50+00:00

s/printk/dev_dbg/

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

W1: w1_slave_read_id read bug, use device_attribute

2008-10-16T18:21:50+00:00

Fix bug reading the id sysfs file.  If less than the full 8 bytes were
read, the next read would start at the first byte instead of continuing.
It needed the offset added to memcpy, or the better solution was to
replace it with the device attribute instead of bin attribute.

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

W1: recode w1_slave_found logic

2008-10-16T18:21:49+00:00

Simplified the logic in w1_slave_found by using the new
w1_attach_slave_device function to find a slave and mark it as active or
add the device if the crc checks.

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

W1: be able to manually add and remove slaves

2008-10-16T18:21:49+00:00

sysfs entries were added to manually add and remove slave devices.  This
is useful if the automatic bus searching is disabled, and the device ids
are already known.

[akpm@linux-foundation.org: fix printk types]
Signed-off-by: David Fries 
Signed-off-by: Evgeniy Polyakov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

W1: feature, enable hardware strong pullup

2008-10-16T18:21:49+00:00

Add a strong pullup option to the w1 system.  This supplies extra power
for parasite powered devices.  There is a w1_master_pullup sysfs entry and
enable_pullup module parameter to enable or disable the strong pullup.

The one wire bus requires at a minimum one wire and ground.  The common
wire is used for sending and receiving data as well as supplying power to
devices that are parasite powered of which temperature sensors can be one
example.  The bus must be idle and left high while a temperature
conversion is in progress, in addition the normal pullup resister on
larger networks or even higher temperatures might not supply enough power.
 The pullup resister can't provide too much pullup current, because
devices need to pull the bus down to write a value.  This enables the
strong pullup for supported hardware, which can supply more current when
requested.  Unsupported hardware will just delay with the bus high.

The hardware USB 2490 one wire bus master has a bit on some commands which
will enable the strong pullup as soon as the command finishes executing.
To use strong pullup, call the new w1_next_pullup function to register the
duration.  The next write command will call set_pullup before sending the
data, and reset the duration to zero once it returns.

Switched from simple_strtol to strict_strtol.

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

W1: w1_process, block or sleep

2008-10-16T18:21:49+00:00

The w1_process thread's sleeping and termination has been modified.
msleep_interruptible was replaced by schedule_timeout and schedule to
allow for kthread_stop and wake_up_process to interrupt the sleep and the
unbounded sleeping when a bus search is disabled.  The W1_MASTER_NEED_EXIT
and flags variable were removed as they were redundant with
kthread_should_stop and kthread_stop.  If w1_process is sleeping,
requesting a search will immediately wake it up rather than waiting for
the end of msleep_interruptible previously.

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

linux-toradex.git/drivers/w1/w1.c, branch tegra-11.2.9

w1: don't allow arbitrary users to remove w1 devices

sysfs: add struct file* to bin_attr callbacks

w1: add __init/__exit macros to w1.c

w1: struct device - replace bus_id with dev_name(), dev_set_name()

W1: w1.c s/printk/dev_dbg/

W1: w1_slave_read_id read bug, use device_attribute

W1: recode w1_slave_found logic

W1: be able to manually add and remove slaves

W1: feature, enable hardware strong pullup

W1: w1_process, block or sleep

w1: add init/exit macros to w1.c