Re: [PATCH V5 0/4] gpio: tegra: Cleanups and support for debounce

From: Stephen Warren
Date: Mon May 02 2016 - 12:13:17 EST

On 04/30/2016 05:07 AM, Linus Walleij wrote:
On Fri, Apr 29, 2016 at 11:20 AM, Laxman Dewangan <ldewangan@xxxxxxxxxx> wrote:
On Friday 29 April 2016 02:37 PM, Linus Walleij wrote:
On Mon, Apr 25, 2016 at 12:38 PM, Laxman Dewangan <ldewangan@xxxxxxxxxx>

Add support for the debounce as Tegra210 support debounce in HW.
Also do the clenaups to remove all global variables.

OK this v5 is applied.

Laxman does this GPIO also have open drain and/or open source

Some of the pins support the open drain and these are part of pinmux
register set.
For that we have property for setting open drain.

IIRC, Tegra has open-drain control in both the GPIO controller for all pins (OE bit) and in the pinmux controller for a small subset of pins. For GPIOs, why wouldn't we just use the control bit in the GPIO controller for all GPIOs. This would avoid any special-cases, and minimize coupling between the GPIO and pinctrl drivers.