linux-kernel - Re: [PATCH 08/17] pinctrl: sunxi: add support for R329 R-PIO pin controller

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Date:   Wed, 18 Aug 2021 22:22:48 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Icenowy Zheng <icenowy@...eed.com>,
        Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Andre Przywara <andre.przywara@....com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/17] pinctrl: sunxi: add support for R329 R-PIO pin
 controller

On 8/2/21 1:22 AM, Icenowy Zheng wrote:
> Allwinner R320 SoC has a pin controller in the CPUS power domain.
> 
> Add support for it.
> 
> Signed-off-by: Icenowy Zheng <icenowy@...eed.com>
> ---
>  drivers/pinctrl/sunxi/Kconfig                 |   5 +
>  drivers/pinctrl/sunxi/Makefile                |   1 +
>  drivers/pinctrl/sunxi/pinctrl-sun50i-r329-r.c | 292 ++++++++++++++++++
>  3 files changed, 298 insertions(+)
>  create mode 100644 drivers/pinctrl/sunxi/pinctrl-sun50i-r329-r.c
> 
> diff --git a/drivers/pinctrl/sunxi/Kconfig b/drivers/pinctrl/sunxi/Kconfig
> index c662e8b1b351..abd60ff8daec 100644
> --- a/drivers/pinctrl/sunxi/Kconfig
> +++ b/drivers/pinctrl/sunxi/Kconfig
> @@ -134,4 +134,9 @@ config PINCTRL_SUN50I_R329
>  	default ARM64 && ARCH_SUNXI
>  	select PINCTRL_SUNXI
>  
> +config PINCTRL_SUN50I_R329_R
> +	bool "Support for the Allwinner R329 R-PIO"
> +	default ARM64 && ARCH_SUNXI
> +	select PINCTRL_SUNXI
> +
>  endif
> diff --git a/drivers/pinctrl/sunxi/Makefile b/drivers/pinctrl/sunxi/Makefile
> index e33f7c5f1ff9..245840a7959e 100644
> --- a/drivers/pinctrl/sunxi/Makefile
> +++ b/drivers/pinctrl/sunxi/Makefile
> @@ -26,5 +26,6 @@ obj-$(CONFIG_PINCTRL_SUN50I_H6_R)	+= pinctrl-sun50i-h6-r.o
>  obj-$(CONFIG_PINCTRL_SUN50I_H616)	+= pinctrl-sun50i-h616.o
>  obj-$(CONFIG_PINCTRL_SUN50I_H616_R)	+= pinctrl-sun50i-h616-r.o
>  obj-$(CONFIG_PINCTRL_SUN50I_R329)	+= pinctrl-sun50i-r329.o
> +obj-$(CONFIG_PINCTRL_SUN50I_R329_R)	+= pinctrl-sun50i-r329-r.o
>  obj-$(CONFIG_PINCTRL_SUN9I_A80)		+= pinctrl-sun9i-a80.o
>  obj-$(CONFIG_PINCTRL_SUN9I_A80_R)	+= pinctrl-sun9i-a80-r.o
> diff --git a/drivers/pinctrl/sunxi/pinctrl-sun50i-r329-r.c b/drivers/pinctrl/sunxi/pinctrl-sun50i-r329-r.c
> new file mode 100644
> index 000000000000..dc4792c685ba
> --- /dev/null
> +++ b/drivers/pinctrl/sunxi/pinctrl-sun50i-r329-r.c
> @@ -0,0 +1,292 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Allwinner H616 R_PIO pin controller driver

This needs to be updated.

> + *
> + * Copyright (C) 2020 Arm Ltd.
> + * Based on former work, which is:
> + *   Copyright (C) 2017 Icenowy Zheng <icenowy@...c.io>
> + */
> +
> +#include <linux/init.h>
> +#include <linux/platform_device.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/pinctrl/pinctrl.h>
> +#include <linux/reset.h>
> +
> +#include "pinctrl-sunxi.h"
> +
> +static const struct sunxi_desc_pin sun50i_r329_r_pins[] = {
> +	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 0),
> +		  SUNXI_FUNCTION(0x0, "gpio_in"),
> +		  SUNXI_FUNCTION(0x1, "gpio_out"),
> +		  SUNXI_FUNCTION(0x2, "s_i2s"),		/* LRCK */

"s_i2s0" for these would match existing drivers (and the manual).

Everything else matches the manual.

Regards,
Samuel