Piteball/android_kernel_samsung_msm8976
1
1
Fork 0
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git synced 2024-09-21 03:43:03 +00:00
Code Issues Projects Releases Wiki Activity

ARM: bcm2835: enable GPIO/pinctrl

Browse source 
Enable GPIO and pinctrl in Kconfig.

Add required <mach/gpio.h> for gpiolib.

Instantiate the BCM2835 GPIO module in bcm2835.dtsi.

Add a pinctrl definition to bcm2835-rpi-b.dts that sets up all of the
board's required pinmux configuration. GPIO aren't specified; that's
left to gpio_request().

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Stephen Warren 2012-09-27 21:54:21 -06:00
parent d0f1c7ffaa
commit 805504abdc
4 changed files with 43 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
arch/arm/Kconfig
View file

@ -336,7 +336,7 @@ config ARCH_AT91
config ARCH_BCM2835
bool "Broadcom BCM2835 family"
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARCH_REQUIRE_GPIOLIB
select ARM_AMBA
select ARM_ERRATA_411920
select ARM_TIMER_SP804
@ -344,7 +344,10 @@ config ARCH_BCM2835
select COMMON_CLK
select CPU_V6
select GENERIC_CLOCKEVENTS
select GENERIC_GPIO
select MULTI_IRQ_HANDLER
select PINCTRL
select PINCTRL_BCM2835
select SPARSE_IRQ
select USE_OF
help

15
arch/arm/boot/dts/bcm2835-rpi-b.dts
View file

@ -10,3 +10,18 @@
reg = <0 0x10000000>;
};
};
&gpio {
pinctrl-names = "default";
pinctrl-0 = <&alt0 &alt3>;
alt0: alt0 {
brcm,pins = <0 1 2 3 4 5 6 7 8 9 10 11 14 15 40 45>;
brcm,function = <4>; /* alt0 */
};
alt3: alt3 {
brcm,pins = <48 49 50 51 52 53>;
brcm,function = <7>; /* alt3 */
};
};

23
arch/arm/boot/dts/bcm2835.dtsi
View file

@ -40,5 +40,28 @@
interrupts = <2 25>;
clock-frequency = <3000000>;
};
gpio: gpio {
compatible = "brcm,bcm2835-gpio";
reg = <0x7e200000 0xb4>;
/*
* The GPIO IP block is designed for 3 banks of GPIOs.
* Each bank has a GPIO interrupt for itself.
* There is an overall "any bank" interrupt.
* In order, these are GIC interrupts 17, 18, 19, 20.
* Since the BCM2835 only has 2 banks, the 2nd bank
* interrupt output appears to be mirrored onto the
* 3rd bank's interrupt signal.
* So, a bank0 interrupt shows up on 17, 20, and
* a bank1 interrupt shows up on 18, 19, 20!
*/
interrupts = <2 17>, <2 18>, <2 19>, <2 20>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
};
};
};

1
arch/arm/mach-bcm2835/include/mach/gpio.h Normal file
View file

@ -0,0 +1 @@
/* empty */