From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Mihai.Sain@microchip.com, claudiu.beznea@tuxon.dev,
robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
conor+dt@kernel.org, Nicolas.Ferre@microchip.com,
alexandre.belloni@bootlin.com, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/8] ARM: dts: microchip: sam9x60_curiosity: Add power-supply properties for sdmmc nodes
Date: Tue, 23 Jan 2024 10:58:12 +0100 [thread overview]
Message-ID: <143b8da0-ee76-41a2-a26b-e7513e44e784@linaro.org> (raw)
In-Reply-To: <PH8PR11MB68047F3DD9D23C6749D7F86082742@PH8PR11MB6804.namprd11.prod.outlook.com>
On 23/01/2024 10:07, Mihai.Sain@microchip.com wrote:
> Hi Krzysztof,
>
> I'm sorry for quoting (email is sent from Outlook).
> The sdmmc controller from SAM9 MPUs doesn't support the IO voltage signaling/switching required by the UHS sd-card.
> On the electrical schematics of the boards the controller and sd-card power pins are connected to 3V3 regulator.
> On the SAMA5 MPUs there is support for IO voltage switching but since we have issues with the tuning procedure required but the UHS cards,
> we want to keep vqmmc at 3V3 in order to use high-speed mode.
OK, it is fine for me.
Best regards,
Krzysztof
next prev parent reply other threads:[~2024-01-23 9:58 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-23 8:31 [PATCH 0/8] Add power-supply properties for sdmmc nodes on Microchip boards Mihai Sain
2024-01-23 8:31 ` [PATCH 1/8] ARM: dts: microchip: sam9x60_curiosity: Add power-supply properties for sdmmc nodes Mihai Sain
2024-01-23 8:46 ` Krzysztof Kozlowski
2024-01-23 9:07 ` Mihai.Sain
2024-01-23 9:58 ` Krzysztof Kozlowski [this message]
2024-02-03 16:55 ` claudiu beznea
2024-01-23 8:31 ` [PATCH 2/8] ARM: dts: microchip: sam9x60ek: " Mihai Sain
2024-01-23 8:31 ` [PATCH 3/8] ARM: dts: microchip: sama5d27_som1_ek: " Mihai Sain
2024-01-23 8:31 ` [PATCH 4/8] ARM: dts: microchip: sama5d27_wlsom1: Add power-supply property for sdmmc1 node Mihai Sain
2024-01-23 8:31 ` [PATCH 5/8] ARM: dts: microchip: sama5d27_wlsom1_ek: Add power-supply property for sdmmc0 node Mihai Sain
2024-01-23 8:31 ` [PATCH 6/8] ARM: dts: microchip: sama5d29_curiosity: Add power-supply properties for sdmmc nodes Mihai Sain
2024-01-23 8:31 ` [PATCH 7/8] ARM: dts: microchip: sama5d2_icp: Add power-supply property for sdmmc0 node Mihai Sain
2024-01-23 8:31 ` [PATCH 8/8] ARM: dts: microchip: sama5d2_xplained: " Mihai Sain
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