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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Feb 2025 16:54:43.0524 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e93d48c5-1061-411d-f9a2-08dd55bd1a15 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AM3PEPF00009B9E.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR08MB9945 On Mon, 24 Feb 2025 12:17:42 -0600 Chris Morgan wrote: > On Sat, Feb 22, 2025 at 11:44:39AM +0100, Jernej =C5=A0krabec wrote: > > Hi Chris, > > > > sorry it took so long. > > > > Dne petek, 18. oktober 2024 ob 18:06:14 Srednjeevropski standardni =C4= =8Das je Chris Morgan napisal(a): > > > From: Chris Morgan > > > > > > Add support for the second MMC slot on the Anbernic RG35XX series. > > > The second MMC card is connected to MMC2 (WiFi if present is MMC1). > > > The MMC logic is powered by cldo3 via the power domain to which > > > it is connected, and also has an external 3.3v GPIO controlled > > > regulator required for functionality. > > > > > > Signed-off-by: Chris Morgan > > > --- > > > .../sun50i-h700-anbernic-rg35xx-2024.dts | 27 +++++++++++++++++= -- > > > 1 file changed, 25 insertions(+), 2 deletions(-) > > > > > > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35x= x-2024.dts b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024= .dts > > > index 80ccab7b5ba7..e2039fd76b3d 100644 > > > --- a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.= dts > > > +++ b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-2024.= dts > > > @@ -18,6 +18,9 @@ / { > > > compatible =3D "anbernic,rg35xx-2024", "allwinner,sun50i-h700"; > > > > > > aliases { > > > + mmc0 =3D &mmc0; > > > + mmc1 =3D &mmc2; > > > + mmc2 =3D &mmc1; > > > > Please drop those. As a rule, we don't have it in any DT, since there a= re more > > universal to identify root partition than a relying on device order. > > Would it be okay at least to keep the mmc2 alias mapped to physical > device mmc1? > Confusingly enough, this device is such that mmc0 is the > first mmc card, mmc1 is the SDIO wifi card (not always present depending > on device), and mmc2 is the second mmc card. As Jernej mentioned, this is due to subtle hardware limitations in the Allwinner SoC. I think SDIO and/or the SDIO IRQs only work on MMC1, and MMC2 is typically the only one with 8 data lines. So this order is actually expected. > That way the WiFi at least > when present is always predictably at the mmc2 alias. Why would you want that, exactly? I do understand the desire to have fixed names for the storage devices, but for the WiFi? Doesn't the networking device get named independently from the MMC device number? And, FYI: if you really want the aliases, just pull this DT into U-Boot, and use U-Boot's DT copy when booting the kernel, as U-Boot's build system adds those MMC aliases automatically (since it's somewhat required for U-Bo= ot's own operation): > > > > > serial0 =3D &uart0; > > > }; > > > > > > @@ -175,6 +178,15 @@ reg_vcc5v: regulator-vcc5v { /* USB-C power inpu= t */ > > > regulator-min-microvolt =3D <5000000>; > > > regulator-max-microvolt =3D <5000000>; > > > }; > > > + > > > + reg_vcc3v3_mmc2: regulator-vcc3v3-mmc2 { > > > + compatible =3D "regulator-fixed"; > > > + enable-active-high; > > > + gpio =3D <&pio 4 4 GPIO_ACTIVE_HIGH>; /* PE4 */ > > > + regulator-min-microvolt =3D <3300000>; > > > + regulator-max-microvolt =3D <3300000>; > > > + regulator-name =3D "vcc3v3-mmc2"; > > > + }; > > > }; > > > > > > &cpu0 { > > > @@ -186,10 +198,21 @@ &ehci0 { > > > }; > > > > > > &mmc0 { > > > - vmmc-supply =3D <®_cldo3>; > > > - disable-wp; > > > + bus-width =3D <4>; > > > cd-gpios =3D <&pio 5 6 GPIO_ACTIVE_LOW>; /* PF6 */ > > > + disable-wp; > > > + no-1-8-v; > > > > Please leave properties in same order to minimize patch size. From > > what I can see, only above property is added, which is not needed anywa= y. > > > > Acknowledged. I just figured I'd alphabetize them, but you're right > it's a bit anal. > > > > + vmmc-supply =3D <®_cldo3>; > > > + status =3D "okay"; > > > +}; > > > + > > > +&mmc2 { > > > bus-width =3D <4>; > > > + cd-gpios =3D <&pio 4 22 GPIO_ACTIVE_LOW>; /* PE22 */ > > > + disable-wp; > > > + no-1-8-v; > > > + vmmc-supply =3D <®_vcc3v3_mmc2>; > > > + vqmmc-supply =3D <®_cldo3>; > > > > Is this another SD card slot or eMMC? You configured it as it would be = SD card, > > but mmc2 slots are usually used for eMMC, which needs different configu= ration. > > > > Physical bus mmc0 is the TF1 slot, physical bus mmc2 is the TF2 slot, > and physical bus mmc1 is the SDIO wifi card (which is present on most > but not all devices in the 35xx series). > > > Best regards, > > Jernej > > > > > status =3D "okay"; > > > }; > > > > > > > > > > > > > > > > Please let me know about setting alias mmc2, thank you. > Chris > IMPORTANT NOTICE: The contents of this email and any attachments are confid= ential and may also be privileged. If you are not the intended recipient, p= lease notify the sender immediately and do not disclose the contents to any= other person, use it for any purpose, or store or copy the information in = any medium. Thank you.