linux-kernel - Re: [PATCH v2] pinctrl: Ingenic: Add missing UART2 group C for X1000/E

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Message-ID: <CACRpkdZXhy3zkwg8UQj=+-4cqooUYhceEwQEcv1MyM-RLwvoLQ@mail.gmail.com>
Date:   Thu, 21 Apr 2022 00:41:53 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Yunian Yang <reimu@...omaker.com>
Cc:     linux-mips@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] pinctrl: Ingenic: Add missing UART2 group C for X1000/E

On Thu, Mar 24, 2022 at 2:32 PM Yunian Yang <reimu@...omaker.com> wrote:

> v2: Define PC31 pin only once, noted by Paul Cercueil <paul@...pouillou.net>
>     Confirmed to work on hardware. Although the Ingenic folks did this twice
>     in their 4.4 kernel fork; not sure why.

Put the changelog after the commit text at least please.

> X1000/E has a third UART2 pin group selection, which uses the TDI(G2) as RX
> and TDO(G1) as TX. This configuration is becoming increasingly popular in
> newer core boards, such as the Halley2 v4.1. This is done by enabling
> function 1 of a "virtual pin" PC31. See section 19.3.3 of the X1000
> Programming Manual for details.
>
> Signed-off-by: Yunian Yang <reimu@...omaker.com>

> @@ -2058,6 +2059,7 @@ static const struct group_desc x1000_groups[] = {
>         INGENIC_PIN_GROUP("uart1-data-d", x1000_uart1_data_d, 1),
>         INGENIC_PIN_GROUP("uart1-hwflow", x1000_uart1_hwflow, 1),
>         INGENIC_PIN_GROUP("uart2-data-a", x1000_uart2_data_a, 2),
> +       INGENIC_PIN_GROUP("uart2-data-c", x1000_uart2_data_c, 1),

This doesn't apply to the current mainline kernel, which doesn't
even have the uart2-data-a designation.

Clearly this patch depend on something that I haven't
yet applied? Something I missed?

Yours,
Linus Walleij