From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 6C734538C for ; Tue, 19 Sep 2023 10:39:21 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A241B1FB; Tue, 19 Sep 2023 03:39:57 -0700 (PDT) Received: from donnerap.arm.com (donnerap.manchester.arm.com [10.32.101.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 52A253F67D; Tue, 19 Sep 2023 03:39:18 -0700 (PDT) From: Andre Przywara To: Lee Jones , Chen-Yu Tsai , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Icenowy Zheng , Mark Brown , Jernej Skrabec , Samuel Holland , Shengyu Qu , Martin Botka , Matthew Croughan , linux-sunxi@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 0/2] mfd: axp20x: improve support without interrupts Date: Tue, 19 Sep 2023 11:39:11 +0100 Message-Id: <20230919103913.463156-1-andre.przywara@arm.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This is a more of a re-send, rebased on top of v6.6-rc2, with the tags added, and adding back the binding patch, since this seems to have fallen through the cracks somehow. Changelog below. ------------------------------ Every AXP PMIC we support sports an IRQ pin, that signals certain events to the SoC. For some of the chip's functionality an interrupt is crucial for operation (for instance a power key event), but for the basic regulator features for instance the interrupt does not add much. Recently we started seeing boards with smaller PMICs, that don't bother to connect the IRQ line to anything. So far we handled this as a special case for the AXP305, but there are more examples now that justify a more general solution. Patch 1/2 adds more PMICs to the list of chips for which the interrupts DT property is optional: this is needed to correctly describe some newer boards without the IRQ pin connected. Ideally we would make this optional for every PMIC, but it is unclear whether this is a good idea: many older the "bigger" PMICs have multiple MFD devices that require an interrupt, so not having interrupt functionality might not be feasible for their operation. Also so far all boards with those PMICs connect the IRQ pin, so there is no immediate need for such a relaxation. Patch 2/2 then generalises the "no interrupt specified" case in the MFD driver, as this was special cased for two PMIC models so far. This allows boards with an AXP313a to not specify an IRQ line: there are actually multiple boards relying on this out there. Cheers, Andre Changelog v3 ... v2: - rebased on top of v6.6-rc2 - add back binding patch - tags added Changelog v2 ... v1: - drop reordering approach, use separate cell lists instead Andre Przywara (2): dt-bindings: mfd: x-powers,axp152: make interrupt optional for more chips mfd: axp20x: Generalise handling without interrupt .../bindings/mfd/x-powers,axp152.yaml | 5 ++- drivers/mfd/axp20x.c | 44 ++++++++++--------- 2 files changed, 28 insertions(+), 21 deletions(-) -- 2.25.1