[PATCH 0/4] gpio: lpc32xx: add new LPC32xx GPIO controller driver

Vladimir Zapolskiy vz at mleia.com
Mon Nov 30 01:13:17 PST 2015

Hi Linus,

On 30.11.2015 10:54, Linus Walleij wrote:
> On Fri, Nov 20, 2015 at 2:29 AM, Vladimir Zapolskiy <vz at mleia.com> wrote:
>> Unfortunately the old driver has too many hacks inherited from the
>> ancient legacy NXP BSP and I find it can not be maintained, the new
>> driver has compatible interface to device tree clients, so moving
>> to the new driver should not impact any GPIO consumers.
> Has it been tested on the old hardware too?

the hardware here is the same, the driver is different.

With the existing LPC32xx DTS files I tested that the DTS GPIO client's
interface is unchanged and that GPIO client drivers correctly work with
the new GPIO controller driver.

As a summary about the change,
* DT binding of GPIO controller in lpc32xx.dtsi is extended (no removed
* client's DT binding to the GPIO controller are untouched,
* GPIO controller code is completely replaced,
* GPIO client's side is untouched.

As a reminder about the necessity of the change, the legacy driver
operates with hardware IRQs, this prevents switching of the platfrom to

It is important that the change depends on IRQ chip driver, which is
also under review.

I would appreciate, if review of this change can be started, so that
both IRQ chip driver and GPIO controller driver are accepted in one
merge window.

With best wishes,

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