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From: Andy Shevchenko <>
To: Dario Binacchi <>
Cc: Linux Kernel Mailing List <>,
	 Haojian Zhuang <>,
	Linus Walleij <>,
	 Tony Lindgren <>,
	 linux-arm Mailing List <>,
	 "open list:GPIO SUBSYSTEM" <>,
	 Linux OMAP Mailing List <>
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: <> (raw)
In-Reply-To: <>

On Wed, May 19, 2021 at 3:58 AM Dario Binacchi <> 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]

With Best Regards,
Andy Shevchenko

linux-arm-kernel mailing list

      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 [PATCH v2 0/2] am335x: set pinmux registers from pins debug file 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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