From: Anson Huang <anson.huang@nxp.com>
To: Fabio Estevam <festevam@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
linux-kernel <linux-kernel@vger.kernel.org>,
Rob Herring <robh+dt@kernel.org>,
dl-linux-imx <linux-imx@nxp.com>,
Sascha Hauer <kernel@pengutronix.de>,
Shawn Guo <shawnguo@kernel.org>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>
Subject: RE: [PATCH] ARM: dts: imx7ulp-evk: Use APLL_PFD1 as usdhc's clock source
Date: Thu, 31 Oct 2019 00:38:55 +0000 [thread overview]
Message-ID: <DB3PR0402MB391696BD522A252C9E386F0BF5630@DB3PR0402MB3916.eurprd04.prod.outlook.com> (raw)
In-Reply-To: <CAOMZO5CnBCbM2uhDpgUgRVXkVsPTDw27CxZUp3+FMZi+7DH1XQ@mail.gmail.com>
Hi, Fabio
> 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.
Will add fix tag in V2, thanks.
Anson
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prev parent reply other threads:[~2019-10-31 0:39 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
2019-10-31 0:38 ` Anson Huang [this message]
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