From mboxrd@z Thu Jan 1 00:00:00 1970 From: linus.walleij@linaro.org (Linus Walleij) Date: Tue, 31 Oct 2017 10:34:28 +0100 Subject: [PATCH v2 6/7] gpio: brcmstb: consolidate interrupt domains In-Reply-To: <20171024195451.30535-7-opendmb@gmail.com> References: <20171024195451.30535-1-opendmb@gmail.com> <20171024195451.30535-7-opendmb@gmail.com> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Oct 24, 2017 at 9:54 PM, Doug Berger 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 Patch applied with the tags. This needs to be revisited when we have Thierry's block/bank infrastructure merged. Yours, Linus Walleij