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dmarc=none action=none header.from=nxp.com; Received: from VI1PR04MB5696.eurprd04.prod.outlook.com (2603:10a6:803:e7::13) by VI1PR04MB5503.eurprd04.prod.outlook.com (2603:10a6:803:d1::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3589.20; Thu, 19 Nov 2020 15:50:50 +0000 Received: from VI1PR04MB5696.eurprd04.prod.outlook.com ([fe80::2dd6:8dc:2da7:ad84]) by VI1PR04MB5696.eurprd04.prod.outlook.com ([fe80::2dd6:8dc:2da7:ad84%5]) with mapi id 15.20.3589.024; Thu, 19 Nov 2020 15:50:50 +0000 From: Vladimir Oltean To: Shawn Guo , Li Yang , Rob Herring , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org Cc: Adrian Hunter , Ulf Hansson , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Ashish Kumar , Yangbo Lu , Michael Walle Subject: [PATCH] arm64: dts: ls1028a: make the eMMC and SD card controllers use fixed indices Date: Thu, 19 Nov 2020 17:50:25 +0200 Message-Id: <20201119155025.965941-1-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.25.1 X-Originating-IP: [188.25.2.177] X-ClientProxiedBy: AM0PR01CA0172.eurprd01.prod.exchangelabs.com (2603:10a6:208:aa::41) To VI1PR04MB5696.eurprd04.prod.outlook.com (2603:10a6:803:e7::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (188.25.2.177) by AM0PR01CA0172.eurprd01.prod.exchangelabs.com (2603:10a6:208:aa::41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3589.21 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: f9fcff52-d3ca-4c5c-a376-08d88ca2e37d X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB5696.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Nov 2020 15:50:50.4496 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: gr9OURlqzIEORCGUXhbap6FM74j8lErFuypnR3mvYwVcIquFvILD7zP6PIk3/W2GTsbULHtT4+gwEm0U6RE+ZA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB5503 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org As the boot order in the kernel continues to change, sometimes it may happen that the eSDHC controller mmc@2150000 (the one for eMMC) gets probed before the one at mmc@2140000 (for external SD cards). The effect is that the eMMC controller gets the /dev/mmcblk0 name, and the SD card gets /dev/mmcblk1. Since the introduction of this SoC, that has never happened in practice, even though it was never guaranteed in theory. Setting "root=/dev/mmcblk0p2" in /proc/cmdline has always caused the kernel to use the second partition from the SD card as the rootfs. Preserve that old behavior by adding some aliases which create naming consistency: - the SD card controller uses /dev/mmcblk0 - the eMMC controller uses /dev/mmcblk1 The aliases are parsed by mmc_alloc_host() in drivers/mmc/core/host.c. Cc: Ashish Kumar Cc: Yangbo Lu Cc: Michael Walle Signed-off-by: Vladimir Oltean --- arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts | 2 ++ arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts | 2 ++ arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts | 2 ++ 3 files changed, 6 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts index 8161dd237971..7d292999f8da 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts @@ -23,6 +23,8 @@ aliases { serial2 = &lpuart1; spi0 = &fspi; spi1 = &dspi2; + mmc0 = &esdhc; + mmc1 = &esdhc1; }; buttons0 { diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts index 13cdc958ba3e..c0786b713791 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds.dts @@ -23,6 +23,8 @@ aliases { gpio2 = &gpio3; serial0 = &duart0; serial1 = &duart1; + mmc0 = &esdhc; + mmc1 = &esdhc1; }; chosen { diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts index 1efb61cff454..c1d1ba459307 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts @@ -19,6 +19,8 @@ aliases { crypto = &crypto; serial0 = &duart0; serial1 = &duart1; + mmc0 = &esdhc; + mmc1 = &esdhc1; }; chosen {