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bh=rQbCwQn4OcCXCHFwwmFatk+l/n8S/B77Id3xHHz9OsQ=; b=te4TVB5WNIjt1p5mD9DUQAIapDQueXDRZeVO0wmwFIRSoX4cOCCkLXNbe6fhlfULiW FBDqUFFQSidDmxT3DjI6zyxmiVrgLTr1Wp1L0Fi/s6uTumjcc476mXAdF0i7TFO8iX6e +kXeds1CU2XJ8CdiYWnRB5W9Gp1W4cxpub2UoWqCAuCY4uJzxWsW65fPzuCTnVVcxbjt hvJxDbSmTlxjF+/4HaQVI5FKtwIyva5yMP9XyBYcEJCgmGkubx3l6gsIRu+srmpgTLrQ rp4PIjwYJWNCD3pGDEbkofcs/73J/RzabYn74/HWwLzGgRJlcebWe7jU3LrPj/pxsTTs 4cIw== X-Gm-Message-State: APjAAAUQzQ1ouEfbMs02TXOwdnd3zUfnQrct9VZSV+Otmez35kE5slQr itbPTBSvMDbstwyZLGWOjUR4sV2LItN1mymI6EA= X-Google-Smtp-Source: APXvYqyAwsBC9wzuv9VJycNb0BcgLvYOqtu9D89Ede9Rm7uVYGbmJDn/HV4nb+IlolpfBAIr7w5KPoyDEC0kHOBnxgk= X-Received: by 2002:a2e:819a:: with SMTP id e26mr2713781ljg.26.1572354929138; Tue, 29 Oct 2019 06:15:29 -0700 (PDT) MIME-Version: 1.0 References: <1572343372-6303-1-git-send-email-Anson.Huang@nxp.com> In-Reply-To: <1572343372-6303-1-git-send-email-Anson.Huang@nxp.com> From: Fabio Estevam Date: Tue, 29 Oct 2019 10:15:31 -0300 Message-ID: Subject: Re: [PATCH] ARM: dts: imx7ulp-evk: Use APLL_PFD1 as usdhc's clock source To: Anson Huang Cc: Rob Herring , Mark Rutland , Shawn Guo , Sascha Hauer , Sascha Hauer , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" , linux-kernel , NXP Linux Team Content-Type: text/plain; charset="UTF-8" Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi Anson, On Tue, Oct 29, 2019 at 7:06 AM Anson Huang wrote: > > i.MX7ULP does NOT support runtime switching clock source for PCC, > APLL_PFD1 by default is usdhc's clock source, so just use it > in kernel to avoid below kernel dump during kernel boot up and > make sure kernel can boot up with SD root file-system. > > [ 3.035892] Loading compiled-in X.509 certificates > [ 3.136301] sdhci-esdhc-imx 40370000.mmc: Got CD GPIO > [ 3.242886] mmc0: Reset 0x1 never completed. > [ 3.247190] mmc0: sdhci: ============ SDHCI REGISTER DUMP =========== > [ 3.253751] mmc0: sdhci: Sys addr: 0x00000000 | Version: 0x00000002 > [ 3.260218] mmc0: sdhci: Blk size: 0x00000200 | Blk cnt: 0x00000001 > [ 3.266775] mmc0: sdhci: Argument: 0x00009a64 | Trn mode: 0x00000000 > [ 3.273333] mmc0: sdhci: Present: 0x00088088 | Host ctl: 0x00000002 > [ 3.279794] mmc0: sdhci: Power: 0x00000000 | Blk gap: 0x00000080 > [ 3.286350] mmc0: sdhci: Wake-up: 0x00000008 | Clock: 0x0000007f > [ 3.292901] mmc0: sdhci: Timeout: 0x0000008c | Int stat: 0x00000000 > [ 3.299364] mmc0: sdhci: Int enab: 0x007f010b | Sig enab: 0x00000000 > [ 3.305918] mmc0: sdhci: ACmd stat: 0x00000000 | Slot int: 0x00008402 > [ 3.312471] mmc0: sdhci: Caps: 0x07eb0000 | Caps_1: 0x0000b400 > [ 3.318934] mmc0: sdhci: Cmd: 0x0000113a | Max curr: 0x00ffffff > [ 3.325488] mmc0: sdhci: Resp[0]: 0x00000900 | Resp[1]: 0x0039b37f > [ 3.332040] mmc0: sdhci: Resp[2]: 0x325b5900 | Resp[3]: 0x00400e00 > [ 3.338501] mmc0: sdhci: Host ctl2: 0x00000000 > [ 3.343051] mmc0: sdhci: ============================================ > > Signed-off-by: Anson Huang Thanks, with this patch applied I can get SD card rootfs to get mounted: Tested-by: Fabio Estevam I think this fix deserves a Fixes tag so that it can be backported to older kernels.