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1bfe610491
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: ============================================
Fixes: 20434dc92c ("ARM: dts: imx: add common imx7ulp dtsi support")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Tested-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.