Hi Gerd,
> Gerd Hoffmann <kraxel@xxxxxxxxxx> hat am 7. September 2016 um 12:31
> geschrieben:
>
>
> From: Eric Anholt <eric@xxxxxxxxxx>
>
> The BCM2835-ARM-Peripherals.pdf documentation specifies what the
> function selects do for the pins, and there are a bunch of obvious
> groupings to be made. With these created, we'll be able to replace
> bcm2835-rpi.dtsi's main "set all of these pins to alt0" with
> references to specific groups we want enabled.
>
> Signed-off-by: Eric Anholt <eric@xxxxxxxxxx>
> ---
> arch/arm/boot/dts/bcm283x.dtsi | 170
> +++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 170 insertions(+)
>
> diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
> index 4d9f3ab..acb616f 100644
> --- a/arch/arm/boot/dts/bcm283x.dtsi
> +++ b/arch/arm/boot/dts/bcm283x.dtsi
> @@ -131,6 +131,176 @@
>
> interrupt-controller;
> #interrupt-cells = <2>;
> +
> + /* Defines pin muxing groups according to
> + * BCM2835-ARM-Peripherals.pdf page 102.
> + *
> + * While each pin can have its mux selected
> + * for various functions individually, some
> + * groups only make sense to switch to a
> + * particular function together.
> + */
> ...
> + i2c0_gpio32: i2c0_gpio32 {
> + brcm,pins = <32 34>;
> + brcm,function = <BCM2835_FSEL_ALT0>;
> + };
> + spio0_gpio35: spio0_gpio35 {
> + brcm,pins = <35 36 37 38 39>;
> + brcm,function = <BCM2835_FSEL_ALT0>;
> + };
s/spio0/spi0
> + pwm0_gpio40: pwm0_gpio40 {
> + brcm,pins = <40>;
> + brcm,function = <BCM2835_FSEL_ALT0>;
> + };
> ...
> + uart1_ctsrts_gpio42: uart1_ctsrts_gpio42 {
> + brcm,pins = <42 43>;
> + brcm,function = <BCM2835_FSEL_ALT5>;
> + };
Please sort all pinctrl nodes by label.
According to this page [1] the pinctrl group for parallel display interface is
missing. Is it intended?
[1] - http://elinux.org/RPi_BCM2835_GPIOs
> };
>
> uart0: serial@7e201000 {
> --
> 1.8.3.1
>
>
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