Re: [PATCH 2/4] pinmux: Add TB10x pinmux driver

From: Linus Walleij
Date: Mon Jul 29 2013 - 18:35:13 EST

Sorry for taking eternities to look into this.

On Tue, Jun 18, 2013 at 11:29 AM, Christian Ruppert
<christian.ruppert@xxxxxxxxxx> wrote:

> The pinmux driver of the Abilis Systems TB10x platform based on ARC700 CPUs.
> Used to control the pinmux and is a prerequisite for the GPIO driver.
> Signed-off-by: Christian Ruppert <christian.ruppert@xxxxxxxxxx>
> Signed-off-by: Pierrick Hascoet <pierrick.hascoet@xxxxxxxxxx>
> +The following pin groups are available:
> + - GPIO ports: gpioa_pins, gpiob_pins, gpioc_pins, gpiod_pins, gpioe_pins,
> + gpiof_pins, gpiog_pins, gpioh_pins, gpioi_pins, gpioj_pins,
> + gpiok_pins, gpiol_pins, gpiom_pins, gpion_pins

I would not attempt to define groups for all GPIO pins.

> +gpioa: gpio@FF140000 {
> + compatible = "abilis,tb10x-gpio";
> + reg = <0xFF140000 0x1000>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + ngpio = <3>;
> + gpio-ranges = <&iomux 0 0>;
> + gpio-ranges-group-names = "gpioa_pins";

This uses that feature to define GPIO ranges from a group does
it not? I'm not certain about that feature.

I don't see any of the port concept creeping into the device tree
in this version and that is how I think it should be kept:
the "port" particulars is a thing for the driver and not the
device tree.

Linus Walleij
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