]> git.baikalelectronics.ru Git - kernel.git/commit
gpiolib: provide provision to register pin ranges
authorShiraz Hashim <shiraz.hashim@st.com>
Sat, 27 Oct 2012 09:51:36 +0000 (15:21 +0530)
committerLinus Walleij <linus.walleij@linaro.org>
Sun, 11 Nov 2012 18:06:00 +0000 (19:06 +0100)
commit83eec95f4de84ed92c1e296f470b31457ed8daa0
treed1d17f111e57038c7ef6df43e79bb969c5844cd2
parent84280903ff9a0d0dc354f50dc40e85afd1cb76f5
gpiolib: provide provision to register pin ranges

pinctrl subsystem needs gpio chip base to prepare set of gpio
pin ranges, which a given pinctrl driver can handle. This is
important to handle pinctrl gpio request calls in order to
program a given pin properly for gpio operation.

As gpio base is allocated dynamically during gpiochip
registration, presently there exists no clean way to pass this
information to the pinctrl subsystem.

After few discussions from [1], it was concluded that may be
gpio controller reporting the pin range it supports, is a
better way than pinctrl subsystem directly registering it.

[1] http://comments.gmane.org/gmane.linux.ports.arm.kernel/184816

Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com>
[Edited documentation a bit]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Documentation/devicetree/bindings/gpio/gpio.txt
Documentation/gpio.txt
Documentation/pinctrl.txt
drivers/gpio/gpiolib-of.c
drivers/gpio/gpiolib.c
drivers/pinctrl/core.c
drivers/pinctrl/devicetree.c
include/asm-generic/gpio.h
include/linux/gpio.h
include/linux/pinctrl/pinctrl.h