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Message-ID: <212b0bd5-0b4a-49fe-bd8f-ac66c93cc98b@collabora.com>
Date: Wed, 3 Jan 2024 13:22:24 +0100
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Subject: Re: [PATCH v4 10/24] arm64: dts: mediatek: mt8183: Enable cros-ec-spi
 as wake source
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To: Mark Hasemeyer <markhas@chromium.org>, LKML <linux-kernel@vger.kernel.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>, Rob Herring <robh@kernel.org>,
 Andy Shevchenko <andriy.shevchenko@intel.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
 Konrad Dybcio <konrad.dybcio@linaro.org>, Raul Rangel
 <rrangel@chromium.org>, Tzung-Bi Shih <tzungbi@kernel.org>,
 Conor Dooley <conor+dt@kernel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Matthias Brugger <matthias.bgg@gmail.com>, Rob Herring <robh+dt@kernel.org>,
 devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
 linux-mediatek@lists.infradead.org
References: <20240102210820.2604667-1-markhas@chromium.org>
 <20240102140734.v4.10.Iba4a8b7e908989e57f7838a80013a4062be5e614@changeid>
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
In-Reply-To: <20240102140734.v4.10.Iba4a8b7e908989e57f7838a80013a4062be5e614@changeid>
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Il 02/01/24 22:07, Mark Hasemeyer ha scritto:
> The cros_ec driver currently assumes that cros-ec-spi compatible device
> nodes are a wakeup-source even though the wakeup-source property is not
> defined.
> 
> Some Chromebooks use a separate wake pin, while others overload the
> interrupt for wake and IO. With the current assumption, spurious wakes
> can occur on systems that use a separate wake pin. It is planned to
> update the driver to no longer assume that the EC interrupt pin should
> be enabled for wake.
> 
> Add the wakeup-source property to all cros-ec-spi compatible device
> nodes to signify to the driver that they should still be a valid wakeup
> source.
> 
> Signed-off-by: Mark Hasemeyer <markhas@chromium.org>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>