linux-kernel - Re: 5.15-rc2 panics on boot on RK3288 veyron speedy, seems related to rockchip pinctrl / gpio split

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Date:   Sun, 26 Sep 2021 22:11:59 +0200
From:   Heiko Stuebner <heiko@...ech.de>
To:     Jianqun Xu <jay.xu@...k-chips.com>,
        linux-rockchip@...ts.infradead.org
Cc:     linus.walleij@...aro.org, brgl@...ev.pl,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        linux-gpio@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Urja Rannikko <urjaman@...il.com>
Subject: Re: 5.15-rc2 panics on boot on RK3288 veyron speedy, seems related to rockchip pinctrl / gpio split

Hi,

Am Sonntag, 26. September 2021, 13:57:33 CEST schrieb Urja Rannikko:
> A boot log of this is attached. I can say that this happens on
> 5.15-rc2 but not on 5.14.7.
> 
> Based on the log and some reading of the code my diagnosis is that
> rockchip_pinctrl_probe (via rockchip_pinctrl_register and after that
> the pinctrl core register calls) ends up trying to apply the
> configuration and accesses a null bank->gpio_chip (i think at
> drivers/pinctrl/pinctrl-rockchip.c:2139)
> before the gpio is "populated" / probed a couple of lines later in
> rockchip_pinctrl_probe (line 2710 onwards).
> 
> What I don't know is how this is supposed to work and/or how to
> properly fix it, so that's why I'm sending this bug report instead.
> 
> I'm sending this to the people who last touched the rockchip pinctrl
> (and gpio), because that's where this log points me to.

See
https://lore.kernel.org/all/20210913224926.1260726-1-heiko@sntech.de/

Heiko