Messages in this thread | | | From | Gregory Fong <> | Date | Thu, 26 Oct 2017 16:44:59 -0700 | Subject | Re: [PATCH v2 6/7] gpio: brcmstb: consolidate interrupt domains |
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On Tue, Oct 24, 2017 at 12:54 PM, Doug Berger <opendmb@gmail.com> wrote: > The GPIOLIB IRQ chip helpers were very appealing, but badly broke > the 1:1 mapping between a GPIO controller's device_node and its > interrupt domain. > > When another device-tree node references a GPIO device as its > interrupt parent, the irq_create_of_mapping() function looks for > the irq domain of the GPIO device and since all bank irq domains > reference the same GPIO device node it always resolves to the irq > domain of the first bank regardless of which bank the number of > the GPIO should resolve. This domain can only map hwirq numbers > 0-31 so interrupts on GPIO above that can't be mapped by the > device-tree. > > This commit effectively reverts the patch from Gregory Fong [1] > that was accepted upstream and replaces it with a consolidated > irq domain implementation with one larger interrupt domain per > GPIO controller instance spanning multiple GPIO banks based on > an earlier patch [2] also submitted by Gregory Fong. > > [1] https://patchwork.kernel.org/patch/6921561/ > [2] https://patchwork.kernel.org/patch/6347811/ > > Fixes: 19a7b6940b78 ("gpio: brcmstb: Add interrupt and wakeup source support") > Signed-off-by: Doug Berger <opendmb@gmail.com>
Reviewed-by: Gregory Fong <gregory.0xf0@gmail.com>
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