From: stefan.wahren@i2se.com (Stefan Wahren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH RFC 3/4] ARM: bcm2835: specify card detect pin for RPi B
Date: Wed, 2 Dec 2015 17:33:44 +0100 [thread overview]
Message-ID: <565F1D68.5030503@i2se.com> (raw)
In-Reply-To: <565E690B.8020801@wwwdotorg.org>
Am 02.12.2015 um 04:44 schrieb Stephen Warren:
> On 11/19/2015 09:06 AM, Stefan Wahren wrote:
>> Only the Raspberry Pi B has a card detect pin. Specify it
>> on board level because it's not free to use.
> This seems fine, but it should have no effect in practice; when the SD
> controller driver gpio_get()s the GPIO, the same setting will be
> programmed into HW. There's a requirement to use the pinctrl bindings to
> configure pins to non-GPIO mux settings, but no actual requirement to do
> so for GPIOs.
>
> However, the new node sdhci_cd should be added to some pinctrl-0
> property or it won't be used.
This is done in Patch 4
WARNING: multiple messages have this Message-ID (diff)
From: Stefan Wahren <stefan.wahren-eS4NqCHxEME@public.gmane.org>
To: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Ian Campbell
<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Lee Jones <lee-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Eric Anholt <eric-WhKQ6XTQaPysTnJN9+BGXg@public.gmane.org>,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH RFC 3/4] ARM: bcm2835: specify card detect pin for RPi B
Date: Wed, 2 Dec 2015 17:33:44 +0100 [thread overview]
Message-ID: <565F1D68.5030503@i2se.com> (raw)
In-Reply-To: <565E690B.8020801-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
Am 02.12.2015 um 04:44 schrieb Stephen Warren:
> On 11/19/2015 09:06 AM, Stefan Wahren wrote:
>> Only the Raspberry Pi B has a card detect pin. Specify it
>> on board level because it's not free to use.
> This seems fine, but it should have no effect in practice; when the SD
> controller driver gpio_get()s the GPIO, the same setting will be
> programmed into HW. There's a requirement to use the pinctrl bindings to
> configure pins to non-GPIO mux settings, but no actual requirement to do
> so for GPIOs.
>
> However, the new node sdhci_cd should be added to some pinctrl-0
> property or it won't be used.
This is done in Patch 4
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next prev parent reply other threads:[~2015-12-02 16:33 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-19 16:06 [PATCH RFC 0/4] ARM: bcm2835: assign pins to sdhci pinctrl Stefan Wahren
2015-11-19 16:06 ` Stefan Wahren
2015-11-19 16:06 ` [PATCH RFC 1/4] ARM: bcm2835: remove sdhci pins from GPIO pinctrl Stefan Wahren
2015-11-19 16:06 ` Stefan Wahren
2015-12-02 3:40 ` Stephen Warren
2015-12-02 3:40 ` Stephen Warren
2015-12-05 9:12 ` Stefan Wahren
2015-12-05 9:12 ` Stefan Wahren
2015-12-11 5:15 ` Stephen Warren
2015-12-11 5:15 ` Stephen Warren
2015-11-19 16:06 ` [PATCH RFC 2/4] ARM: bcm2835: rename sdhci pin group Stefan Wahren
2015-11-19 16:06 ` Stefan Wahren
2015-12-02 3:42 ` Stephen Warren
2015-12-02 3:42 ` Stephen Warren
2015-12-05 9:43 ` Stefan Wahren
2015-12-05 9:43 ` Stefan Wahren
2015-12-11 5:19 ` Stephen Warren
2015-12-11 5:19 ` Stephen Warren
2015-11-19 16:06 ` [PATCH RFC 3/4] ARM: bcm2835: specify card detect pin for RPi B Stefan Wahren
2015-11-19 16:06 ` Stefan Wahren
2015-12-02 3:44 ` Stephen Warren
2015-12-02 3:44 ` Stephen Warren
2015-12-02 16:33 ` Stefan Wahren [this message]
2015-12-02 16:33 ` Stefan Wahren
2015-11-19 16:06 ` [PATCH RFC 4/4] ARM: bcm2835: assign pins to sdhci pinctrl Stefan Wahren
2015-11-19 16:06 ` Stefan Wahren
2015-12-01 23:03 ` Eric Anholt
2015-12-01 23:03 ` Eric Anholt
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