Linux-GPIO Archive on lore.kernel.org
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From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Lars Povlsen <lars.povlsen@microchip.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Arnd Bergmann <arnd@arndb.de>,
	Microchip Linux Driver Support <UNGLinuxDriver@microchip.com>,
	"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
	"open list:BROADCOM NVRAM DRIVER" <linux-mips@vger.kernel.org>
Subject: Re: [PATCH] pinctrl: ocelot: Add platform dependency
Date: Mon, 11 May 2020 16:53:29 +0200
Message-ID: <20200511145329.GV34497@piout.net> (raw)
In-Reply-To: <CAMuHMdXZMeY_Oz5fruxhfmS=6Tro0C3P+RoGiRZHpmACFrYXLg@mail.gmail.com>

On 11/05/2020 16:48:01+0200, Geert Uytterhoeven wrote:
> I can connect whatever other system using SPI, i2c, CAN, or Ethernet ;-)
> That doesn't mean I will directly program the other system's pin controller
> over that link, using the standard (MMIO) pinctrl driver.
> 

Yes, my point is that you can access all the SoC registers over SPI and
so you will probably need to also control the pinctrl for example to be
able to actually use the on-SoC switch.


-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

      reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-07 11:40 Geert Uytterhoeven
2020-05-07 11:45 ` Alexandre Belloni
2020-05-07 11:52   ` Geert Uytterhoeven
2020-05-07 12:27   ` Lars Povlsen
2020-05-07 12:44     ` Alexandre Belloni
2020-05-11 11:39       ` Geert Uytterhoeven
2020-05-11 14:20         ` Alexandre Belloni
2020-05-11 14:48           ` Geert Uytterhoeven
2020-05-11 14:53             ` Alexandre Belloni [this message]

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