From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xuebing Wang Subject: /dev/mmcblk0 (or /dev/mmcblk0p1) does not exist on Freescale iMX6SL board Date: Thu, 30 Apr 2015 17:20:12 +0800 Message-ID: <5541F3CC.4090000@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-qg0-f53.google.com ([209.85.192.53]:33840 "EHLO mail-qg0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750710AbbD3JUR (ORCPT ); Thu, 30 Apr 2015 05:20:17 -0400 Received: by qgfi89 with SMTP id i89so22338096qgf.1 for ; Thu, 30 Apr 2015 02:20:16 -0700 (PDT) Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: linux-mmc@vger.kernel.org, Shawn Guo , Sascha Hauer , fabio.estavam@freescale.com, Ulf Hansson , balbi@ti.com, niranjan Patil , richard Jiang Hi linux-mmc community, I am working on a board which is very similar to Freescale iMX6SL EVK (evaluation board), but /dev/mmcblk0 does not exist for kernel v4.0.1 A bit of background information. I was working on kernel 3.10.17, all eMMC works fine, except that USB Mass Storage performance is low when connecting USB to Windows 7 host. Its peformance is ok when connecting to MacOS or Linux host. linux-usb community suggests me to give a try of the latest kernel. Here is how I build uImage and device tree blob: make ARCH=arm imx_v6_v7_defconfig make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- LOADADDR=0x80008000 uImage -j8 make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- LOADADDR=0x80008000 imx6sl-evk.dtb My u-boot resides on eMMC, and I am using tftp (to load uImage and dtb) and nfs-rootfs. --------------------------------- # uname -r 4.0.1 # dmesg | grep mmc [ 1.282872] Driver 'mmcblk' needs updating - please use bus_type methods [ 1.309598] sdhci-esdhc-imx 2190000.usdhc: No vmmc regulator found [ 1.315809] sdhci-esdhc-imx 2190000.usdhc: No vqmmc regulator found [ 1.367511] mmc0: SDHCI controller on 2190000.usdhc [2190000.usdhc] using ADMA [ 1.378980] sdhci-esdhc-imx 2194000.usdhc: No vmmc regulator found [ 1.385191] sdhci-esdhc-imx 2194000.usdhc: No vqmmc regulator found [ 1.437440] mmc1: SDHCI controller on 2194000.usdhc [2194000.usdhc] using ADMA [ 1.449272] sdhci-esdhc-imx 2198000.usdhc: No vmmc regulator found [ 1.455479] sdhci-esdhc-imx 2198000.usdhc: No vqmmc regulator found [ 1.507338] mmc2: SDHCI controller on 2198000.usdhc [2198000.usdhc] using ADMA $ arm-none-linux-gnueabi-gcc --version arm-none-linux-gnueabi-gcc (Sourcery CodeBench Lite 2013.05-24) 4.7.3 Copyright (C) 2012 Free Software Foundation, Inc. --------------------------------- Any suggestions? -- Xuebing