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From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Dario Binacchi <dariobin@libero.it>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	 Haojian Zhuang <haojian.zhuang@linaro.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	 Tony Lindgren <tony@atomide.com>,
	 linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
	 "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
	 Linux OMAP Mailing List <linux-omap@vger.kernel.org>
Subject: Re: [PATCH v2 0/2] am335x: set pinmux registers from pins debug file
Date: Wed, 19 May 2021 14:31:37 +0300	[thread overview]
Message-ID: <CAHp75Vc0kmwuT21=bvpfUj+qAO1XmKEXUpxEEhx3TRZrQbR4Gw@mail.gmail.com> (raw)
In-Reply-To: <20210517200002.6316-1-dariobin@libero.it>

On Wed, May 19, 2021 at 3:58 AM Dario Binacchi <dariobin@libero.it> wrote:
>
>
> The patch was born from the need to change the slew rate of the LCD pins
> of a custom AM335x board during EMC tests. The AM335x, as described in a
> note in section 9.1 of its reference manual [1], is unable to write
> pinmux registers from user space. The series now makes it possible to
> write these registers from the pins debug file.

Even for debugfs it would be nice to have a piece of documentation.
Because pin control is a quite sensitive area and if something goes
wrong, it may damage the hardware.

> [1] https://www.ti.com/lit/ug/spruh73q/spruh73q.pdf


-- 
With Best Regards,
Andy Shevchenko

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      parent reply	other threads:[~2021-05-19 11:50 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-17 20:00 Dario Binacchi
2021-05-17 20:00 ` [PATCH v2 2/2] pinctrl: single: set pinmux " Dario Binacchi
2021-05-18  6:05   ` Tony Lindgren
2021-05-18  8:57     ` Dario Binacchi
2021-05-21  9:25       ` Tony Lindgren
2021-05-19 11:31 ` Andy Shevchenko [this message]

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