diff options
| author |   Stephen Warren <swarren@wwwdotorg.org> | 2012-09-27 21:54:21 -0600 |
|---|---|---|
| committer | Stephen Warren <swarren@wwwdotorg.org> | 2012-10-25 20:42:51 -0600 |
| commit | 805504abdc73cfc745a5fee3d616cdb24bb2a68c (patch) | |
| tree | b531ce1bcc94b540d783b8153f90567dd3c735cc /arch | |
| parent | ARM: bcm2835: implement machine restart hook (diff) | |
| download | linux-dev-805504abdc73cfc745a5fee3d616cdb24bb2a68c.tar.xz linux-dev-805504abdc73cfc745a5fee3d616cdb24bb2a68c.zip | |
ARM: bcm2835: enable GPIO/pinctrl
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/Kconfig | 5 | ||||
| -rw-r--r-- | arch/arm/boot/dts/bcm2835-rpi-b.dts | 15 | ||||
| -rw-r--r-- | arch/arm/boot/dts/bcm2835.dtsi | 23 | ||||
| -rw-r--r-- | arch/arm/mach-bcm2835/include/mach/gpio.h | 1 |
4 files changed, 43 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 73067efd4845..7cce11a1849e 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -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 diff --git a/arch/arm/boot/dts/bcm2835-rpi-b.dts b/arch/arm/boot/dts/bcm2835-rpi-b.dts index 7dd860f83f96..9b72054a0bc0 100644 --- a/arch/arm/boot/dts/bcm2835-rpi-b.dts +++ b/arch/arm/boot/dts/bcm2835-rpi-b.dts @@ -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 */ + }; +}; diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi index 5c5cbafed191..8917550fd1bb 100644 --- a/arch/arm/boot/dts/bcm2835.dtsi +++ b/arch/arm/boot/dts/bcm2835.dtsi @@ -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>; + }; }; }; diff --git a/arch/arm/mach-bcm2835/include/mach/gpio.h b/arch/arm/mach-bcm2835/include/mach/gpio.h new file mode 100644 index 000000000000..40a8c178f10d --- /dev/null +++ b/arch/arm/mach-bcm2835/include/mach/gpio.h @@ -0,0 +1 @@ +/* empty */ |