From: Josua Mayer <josua@solid-run.com>
To: Biju Das <biju.das.jz@bp.renesas.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
magnus.damm <magnus.damm@gmail.com>,
wsa+renesas <wsa+renesas@sang-engineering.com>
Cc: Mikhail Anikin <mikhail.anikin@solid-run.com>,
Yazan Shhady <yazan.shhady@solid-run.com>,
Jon Nettleton <jon@solid-run.com>,
"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-renesas-soc@vger.kernel.org"
<linux-renesas-soc@vger.kernel.org>
Subject: Re: [PATCH v2 0/2] mmc: host: renesas_sdhi_core: support configuring an optional sdio mux
Date: Mon, 1 Dec 2025 14:21:18 +0000 [thread overview]
Message-ID: <af4da0ac-a6f3-4248-9050-537a4ecf7711@solid-run.com> (raw)
In-Reply-To: <TY3PR01MB11346F6A9485A334E8BAAD0E586DBA@TY3PR01MB11346.jpnprd01.prod.outlook.com>
Am 01.12.25 um 14:17 schrieb Biju Das:
>
>> -----Original Message-----
>> From: Josua Mayer <josua@solid-run.com>
>> Sent: 01 December 2025 12:31
>> Subject: [PATCH v2 0/2] mmc: host: renesas_sdhi_core: support configuring an optional sdio mux
>>
>> Some Renesas SoC based boards mux SD and eMMC on a single sdio controller, exposing user control by
>> dip switch and software control by gpio.
>>
>> Purpose is to simplify development and provisioning by selecting boot media at power-on, and again
>> before starting linux.
> Does it mean, you boot with eSD mode, boot the linux with SD mode and flash the image to eMMC??
>
> and then, switch to eMMC boot mode and boot everything from eMMC??
>
>
> Or
>
> boot with eSD mode, flash emmc images at initramfs level/u-boot level
>
> and then, switch to eMMC boot mode and boot everything from eMMC??
The latter.
DIP switch decides bootloader starting from eMMC or SD.
Then u-boot has complete freedom.
Finally U-Boot shall load (and patch) DTB for either eMMC or SD.
Regardless of whether rootfs is initramfs or physical media.
next prev parent reply other threads:[~2025-12-01 14:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-01 12:31 [PATCH v2 0/2] mmc: host: renesas_sdhi_core: support configuring an optional sdio mux Josua Mayer
2025-12-01 12:31 ` [PATCH v2 1/2] dt-bindings: mmc: renesas,sdhi: Add mux-states property Josua Mayer
2025-12-01 13:02 ` Biju Das
2025-12-01 14:00 ` Josua Mayer
2025-12-01 14:15 ` Biju Das
2025-12-22 10:58 ` Geert Uytterhoeven
2025-12-22 11:04 ` Biju Das
2025-12-08 1:25 ` Rob Herring (Arm)
2025-12-09 12:08 ` Ulf Hansson
2025-12-10 14:49 ` Josua Mayer
2025-12-01 12:31 ` [PATCH v2 2/2] mmc: host: renesas_sdhi_core: support configuring an optional sdio mux Josua Mayer
2025-12-08 1:24 ` Rob Herring
2025-12-10 14:54 ` Josua Mayer
2025-12-01 13:17 ` [PATCH v2 0/2] " Biju Das
2025-12-01 14:21 ` Josua Mayer [this message]
2025-12-01 14:27 ` Biju Das
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