Bureaucrats, dave_user, Administrators
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Created page with "<section begin=History/> {| style="border-collapse:collapse; " !colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History |- !style="border-le..."
<section begin=History/>
{| style="border-collapse:collapse; "
!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
|-
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Version
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
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|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|1.0.0
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Jan 2022
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|First DESK-MX8M release
|-
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|}
<section end=History/>
<section begin=Body/>
==Peripheral SD==
=== Device tree configuration ===
Here below an example of device tree configuration used on standard DAVE's kit for the ORCA SOM:
From <code>imx8mp-mito8mplus-cb1001.dts</code>:
<pre>
&usdhc2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usdhc2>, <&pinctrl_usdhc2_gpio>;
cd-gpios = <&gpio2 12 GPIO_ACTIVE_LOW>;
bus-width = <4>;
status = "okay";
};
</pre>
From <code>imx8mp-mito8mplus-cb1001.dts</code>:
<pre>
&iomuxc {
...
...
pinctrl_usdhc2_gpio: usdhc2grp-gpio {
fsl,pins = <
MX8MP_IOMUXC_SD2_CD_B__GPIO2_IO12 0x1c4
>;
};
pinctrl_usdhc2: usdhc2grp {
fsl,pins = <
MX8MP_IOMUXC_SD2_CLK__USDHC2_CLK 0x190
MX8MP_IOMUXC_SD2_CMD__USDHC2_CMD 0x1d0
MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0 0x1d0
MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1 0x1d0
MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2 0x1d0
MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3 0x1d0
>;
};
...
...
};
</pre>
The USDHC interface is re-configured on carrier device tree because of the ''Card Detect'' pin (which is related to the real board hardware implementation).
===Accessing the peripheral===
Once initialized, the SD device is mapped to the standard <code>/dev/mmcblk0pX</code> block device, depending on how many partition are created on the SD card.
====Linux messages at boot time====
If the microSd card is inserted at boot time, the kernel - once the USDHC interface has been initialized - prints the device information and the partition detected like ''p1'', ''p2'', etc.:
<pre class="workstation-terminal">
...
...
[ 1.283284] sdhci: Secure Digital Host Controller Interface driver
[ 1.289476] sdhci: Copyright(c) Pierre Ossman
[ 1.300935] sdhci-pltfm: SDHCI platform and OF driver helper
[ 1.342624] mmc0: SDHCI controller on 30b40000.mmc [30b40000.mmc] using ADMA
[ 1.388722] mmc2: SDHCI controller on 30b60000.mmc [30b60000.mmc] using ADMA
...
[ 1.618036] mmcblk2: mmc2:0001 DG4008 7.28 GiB
[ 1.622685] mmcblk2boot0: mmc2:0001 DG4008 partition 1 4.00 MiB
[ 1.628729] mmcblk2boot1: mmc2:0001 DG4008 partition 2 4.00 MiB
[ 1.635352] mmcblk2rpmb: mmc2:0001 DG4008 partition 3 4.00 MiB, chardev (237:0)
[ 1.644839] mmcblk2: p1 p2 p3
...
[ 2.382461] sdhci-esdhc-imx 30b50000.mmc: Got CD GPIO
[ 2.418293] mmc1: SDHCI controller on 30b50000.mmc [30b50000.mmc] using ADMA
[ 2.505677] mmc1: new high speed SDHC card at address aaaa
[ 2.514258] mmcblk1: mmc1:aaaa SA16G 14.8 GiB
[ 2.527325] mmcblk1: p1 p2
...
...
[ 3.245015] EXT4-fs (mmcblk1p2): mounted filesystem with ordered data mode. Opts: (null)
[ 4.792069] EXT4-fs (mmcblk1p2): re-mounted. Opts: (null)
</pre>
=== Additional information ===
If the root file system configuration does not automatically mount the partition, it is possible to mount the device using the following command:
<pre class="workstation-terminal">
root@desk-mx8mp:~# mkdir -p /mnt/boot
root@desk-mx8mp:~# mkdir -p /mnt/rfs
root@desk-mx8mp:~# mount /dev/mmcblk0p1 /mnt/boot
root@desk-mx8mp:~# mount /dev/mmcblk0p2 /mnt/rfs
root@desk-mx8mp:~#
</pre>
and then the mounted partition are available on the ''/mnt/boot'' and ''/mnt/rfs'' root file system directories.
----
[[Category:ORCA]]
{| style="border-collapse:collapse; "
!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
|-
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Version
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
|-
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|1.0.0
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Jan 2022
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|First DESK-MX8M release
|-
|-
|}
<section end=History/>
<section begin=Body/>
==Peripheral SD==
=== Device tree configuration ===
Here below an example of device tree configuration used on standard DAVE's kit for the ORCA SOM:
From <code>imx8mp-mito8mplus-cb1001.dts</code>:
<pre>
&usdhc2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usdhc2>, <&pinctrl_usdhc2_gpio>;
cd-gpios = <&gpio2 12 GPIO_ACTIVE_LOW>;
bus-width = <4>;
status = "okay";
};
</pre>
From <code>imx8mp-mito8mplus-cb1001.dts</code>:
<pre>
&iomuxc {
...
...
pinctrl_usdhc2_gpio: usdhc2grp-gpio {
fsl,pins = <
MX8MP_IOMUXC_SD2_CD_B__GPIO2_IO12 0x1c4
>;
};
pinctrl_usdhc2: usdhc2grp {
fsl,pins = <
MX8MP_IOMUXC_SD2_CLK__USDHC2_CLK 0x190
MX8MP_IOMUXC_SD2_CMD__USDHC2_CMD 0x1d0
MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0 0x1d0
MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1 0x1d0
MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2 0x1d0
MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3 0x1d0
>;
};
...
...
};
</pre>
The USDHC interface is re-configured on carrier device tree because of the ''Card Detect'' pin (which is related to the real board hardware implementation).
===Accessing the peripheral===
Once initialized, the SD device is mapped to the standard <code>/dev/mmcblk0pX</code> block device, depending on how many partition are created on the SD card.
====Linux messages at boot time====
If the microSd card is inserted at boot time, the kernel - once the USDHC interface has been initialized - prints the device information and the partition detected like ''p1'', ''p2'', etc.:
<pre class="workstation-terminal">
...
...
[ 1.283284] sdhci: Secure Digital Host Controller Interface driver
[ 1.289476] sdhci: Copyright(c) Pierre Ossman
[ 1.300935] sdhci-pltfm: SDHCI platform and OF driver helper
[ 1.342624] mmc0: SDHCI controller on 30b40000.mmc [30b40000.mmc] using ADMA
[ 1.388722] mmc2: SDHCI controller on 30b60000.mmc [30b60000.mmc] using ADMA
...
[ 1.618036] mmcblk2: mmc2:0001 DG4008 7.28 GiB
[ 1.622685] mmcblk2boot0: mmc2:0001 DG4008 partition 1 4.00 MiB
[ 1.628729] mmcblk2boot1: mmc2:0001 DG4008 partition 2 4.00 MiB
[ 1.635352] mmcblk2rpmb: mmc2:0001 DG4008 partition 3 4.00 MiB, chardev (237:0)
[ 1.644839] mmcblk2: p1 p2 p3
...
[ 2.382461] sdhci-esdhc-imx 30b50000.mmc: Got CD GPIO
[ 2.418293] mmc1: SDHCI controller on 30b50000.mmc [30b50000.mmc] using ADMA
[ 2.505677] mmc1: new high speed SDHC card at address aaaa
[ 2.514258] mmcblk1: mmc1:aaaa SA16G 14.8 GiB
[ 2.527325] mmcblk1: p1 p2
...
...
[ 3.245015] EXT4-fs (mmcblk1p2): mounted filesystem with ordered data mode. Opts: (null)
[ 4.792069] EXT4-fs (mmcblk1p2): re-mounted. Opts: (null)
</pre>
=== Additional information ===
If the root file system configuration does not automatically mount the partition, it is possible to mount the device using the following command:
<pre class="workstation-terminal">
root@desk-mx8mp:~# mkdir -p /mnt/boot
root@desk-mx8mp:~# mkdir -p /mnt/rfs
root@desk-mx8mp:~# mount /dev/mmcblk0p1 /mnt/boot
root@desk-mx8mp:~# mount /dev/mmcblk0p2 /mnt/rfs
root@desk-mx8mp:~#
</pre>
and then the mounted partition are available on the ''/mnt/boot'' and ''/mnt/rfs'' root file system directories.
----
[[Category:ORCA]]
