From: Fabio Estevam <festevam@gmail.com>
To: Anson Huang <Anson.Huang@nxp.com>
Cc: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Sascha Hauer <kernel@pengutronix.de>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
NXP Linux Team <Linux-imx@nxp.com>
Subject: Re: [PATCH] ARM: dts: imx7ulp-evk: Use APLL_PFD1 as usdhc's clock source
Date: Tue, 29 Oct 2019 10:15:31 -0300 [thread overview]
Message-ID: <CAOMZO5CnBCbM2uhDpgUgRVXkVsPTDw27CxZUp3+FMZi+7DH1XQ@mail.gmail.com> (raw)
In-Reply-To: <1572343372-6303-1-git-send-email-Anson.Huang@nxp.com>
Hi Anson,
On Tue, Oct 29, 2019 at 7:06 AM Anson Huang <Anson.Huang@nxp.com> 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 <Anson.Huang@nxp.com>
Thanks, with this patch applied I can get SD card rootfs to get mounted:
Tested-by: Fabio Estevam <festevam@gmail.com>
I think this fix deserves a Fixes tag so that it can be backported to
older kernels.
next prev parent reply other threads:[~2019-10-29 13:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-29 10:02 [PATCH] ARM: dts: imx7ulp-evk: Use APLL_PFD1 as usdhc's clock source Anson Huang
2019-10-29 13:15 ` Fabio Estevam [this message]
2019-10-31 0:38 ` Anson Huang
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