[PATCH RFC 3/4] ARM: bcm2835: specify card detect pin for RPi B
stefan.wahren at i2se.com
Wed Dec 2 08:33:44 PST 2015
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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