From: Alexandre Mergnat <amergnat@baylibre.com>
To: AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
macpaul.Lin@mediatek.com
Cc: vsatoes@baylibre.com, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>
Subject: Re: [PATCH] arm64: dts: mediatek: add mmc2 support for mt8365-evk
Date: Wed, 15 Jan 2025 13:12:29 +0100 [thread overview]
Message-ID: <fda131d9-50bf-4049-9e6a-f9cea61846c9@baylibre.com> (raw)
In-Reply-To: <91ac34bf-e184-486d-9af7-f9ddaf8f26ed@collabora.com>
On 14/01/2025 11:38, AngeloGioacchino Del Regno wrote:
>> +&mmc2 {
>> + assigned-clock-parents = <&topckgen CLK_TOP_MSDCPLL>;
>> + assigned-clocks = <&topckgen CLK_TOP_MSDC50_2_SEL>;
>> + bus-width = <4>;
>> + cap-sd-highspeed;
>> + cap-sdio-irq;
>> + hs400-ds-delay = <0x12012>;
>> + keep-power-in-suspend;
>
> Why keep-power-in-suspend?
This slot is mainly used for WiFi / BT / GPS chip, which need to keep powered on.
I guess this is to avoid to do full re-init, re-load firmware, lose context, wake-up from it...
TBH, I didn't work on it, all I know is MTK need it.
--
Regards,
Alexandre
prev parent reply other threads:[~2025-01-15 12:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-10 11:10 Alexandre Mergnat
2025-01-14 10:38 ` AngeloGioacchino Del Regno
2025-01-15 12:12 ` Alexandre Mergnat [this message]
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