Re: [PATCH] x86/platform/geode: Convert LED to GPIO machine descriptor

[Andy Shevchenko <andy.shevchenko@gmail.com>]

On Mon, Jul 27, 2020 at 11:02 AM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> This makes the machine look up the LED from a GPIO machine
> descriptor table. The Geode LEDs should be on the CS5535
> companion chip.

Comments (rather nit-picks) below for all three.

In any case this version is okay
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

I'm not sure the prefix shouldn't be .../geode: for all of them
followed by mentioning the name in the subject line.

> Cc: linux-gpio@vger.kernel.org
> Cc: Andres Salomon <dilinger@queued.net>
> Cc: linux-geode@lists.infradead.org
> Cc: Andy Shevchenko <andy@infradead.org>
> Cc: Darren Hart <dvhart@infradead.org>
> Cc: platform-driver-x86@vger.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>  arch/x86/platform/geode/net5501.c | 13 +++++++++++--
>  1 file changed, 11 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/platform/geode/net5501.c b/arch/x86/platform/geode/net5501.c
> index 163e1b545517..d4e6c57b9c87 100644
> --- a/arch/x86/platform/geode/net5501.c
> +++ b/arch/x86/platform/geode/net5501.c
> @@ -20,6 +20,7 @@
>  #include <linux/platform_device.h>
>  #include <linux/input.h>
>  #include <linux/gpio_keys.h>
> +#include <linux/gpio/machine.h>
>
>  #include <asm/geode.h>
>
> @@ -55,9 +56,7 @@ static struct platform_device net5501_buttons_dev = {
>  static struct gpio_led net5501_leds[] = {
>         {
>                 .name = "net5501:1",
> -               .gpio = 6,
>                 .default_trigger = "default-on",
> -               .active_low = 0,
>         },
>  };
>
> @@ -66,6 +65,15 @@ static struct gpio_led_platform_data net5501_leds_data = {
>         .leds = net5501_leds,
>  };
>
> +static struct gpiod_lookup_table net5501_leds_gpio_table = {
> +       .dev_id = "leds-gpio",
> +       .table = {
> +               /* The Geode GPIOs should be on the CS5535 companion chip */
> +               GPIO_LOOKUP_IDX("cs5535-gpio", 6, NULL, 0, GPIO_ACTIVE_HIGH),

> +               { },

It will be good if we don't put commas in the terminator line (to
avoid copy'n'paste practice of this).

> +       },
> +};

...

>  static void __init register_net5501(void)
>  {
>         /* Setup LED control through leds-gpio driver */
> +       gpiod_add_lookup_table(&net5501_leds_gpio_table);
>         platform_add_devices(net5501_devs, ARRAY_SIZE(net5501_devs));
>  }

The cleanest way is also to provide an __exitcall function, but I
guess it may be too much.

-- 
With Best Regards,
Andy Shevchenko