Difference between revisions of "DESK-MX9-L/Peripherals/SD"

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! colspan="4" style="width:100%; text-align:left" ; border-bottom:solid 2px #ededed" |History
 
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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:#ededed; padding:5px; color:#000000" |2024/01/30
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<section end="History" />
 
<section end="History" />
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__FORCETOC__
 
 
<section begin="Body" />
 
<section begin="Body" />
  
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=== Device tree configuration ===
 
=== Device tree configuration ===
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''N.B.'' The USDHC interface is re-configured on the carrier device tree because of the ''Card Detect'' pin (which is related to the real board hardware implementation).
+
''N.B.'' 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).
  
−
Here below is an example of device tree configuration used on standard DAVE's kit for the AURA SOM:
+
==== AURA SOM ====
 +
Here below an example of device tree configuration used on standard DAVE's kit for the AURA SOM:
  
 
From <code>imx93-aura-cb2001.dts</code>:
 
From <code>imx93-aura-cb2001.dts</code>:
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</pre>
 
</pre>
  
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===Accessing the peripheral ===
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===Accessing the peripheral in AURA SOM===
  
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Once initialized, the SD device is mapped to the standard <code>/dev/mmcblk1pX</code> block device, depending on how many partitions are created on the SD card.
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Once initialized, the SD device is mapped to the standard <code>/dev/mmcblk1pX</code> block device, depending on how many partition are created on the SD card.
  
 
====Linux messages at boot time====
 
====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 partitions detected like ''p1'', ''p2'', etc.:
+
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">
 
<pre class="workstation-terminal">
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=== Additional information ===
 
=== Additional information ===
  
−
If booting from NFS, the file system configuration automatically mounts the uSD partitions.
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If are executed the boot with NFS the file system configuration does automatically mount the uSD partitions.
  
 
<pre class="workstation-terminal">
 
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</pre>
 
</pre>
  
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<section end="Body" />
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----
  
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[[Category:AURA]]
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[[Category:AURA]]
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[[Category:SBCX AURA]]

Revision as of 10:28, 31 January 2024

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History
2024/01/30 DESK-MX9-L-5.0.0 release


Peripheral SD[edit | edit source]

Device tree configuration[edit | edit source]

N.B. 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).

AURA SOM[edit | edit source]

Here below an example of device tree configuration used on standard DAVE's kit for the AURA SOM:

From imx93-aura-cb2001.dts: 

...
&usdhc2 {
	status = "okay";
};
...

From imx93-aura.dtsi: 

...
&usdhc2 {
	pinctrl-names = "default", "state_100mhz", "state_200mhz";
	pinctrl-0 = <&pinctrl_usdhc2>, <&pinctrl_usdhc2_gpio>;
	pinctrl-1 = <&pinctrl_usdhc2>, <&pinctrl_usdhc2_gpio>;
	pinctrl-2 = <&pinctrl_usdhc2>, <&pinctrl_usdhc2_gpio>;
	cd-gpios = <&gpio3 00 GPIO_ACTIVE_LOW>;
	bus-width = <4>;
	no-sdio;
	no-mmc;
	disable-wp;
	no-1-8-v;
	status = "disabled";
};
...
&iomuxc {
...
	pinctrl_usdhc2_gpio: usdhc2gpiogrp {
		fsl,pins = <
			MX93_PAD_SD2_CD_B__GPIO3_IO00		0x31e
		>;
	};

	pinctrl_usdhc2: usdhc2grp {
		fsl,pins = <
			MX93_PAD_SD2_CLK__USDHC2_CLK		0x17fe
			MX93_PAD_SD2_CMD__USDHC2_CMD		0x13fe
			MX93_PAD_SD2_DATA0__USDHC2_DATA0	0x13fe
			MX93_PAD_SD2_DATA1__USDHC2_DATA1	0x13fe
			MX93_PAD_SD2_DATA2__USDHC2_DATA2	0x13fe
			MX93_PAD_SD2_DATA3__USDHC2_DATA3	0x13fe
			MX93_PAD_SD2_VSELECT__USDHC2_VSELECT	0x51e
		>;
	};
...
};

Accessing the peripheral in AURA SOM[edit | edit source]

Once initialized, the SD device is mapped to the standard /dev/mmcblk1pX block device, depending on how many partition are created on the SD card.

Linux messages at boot time[edit | edit source]

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.: 

...
...
[    1.347520] sdhci: Secure Digital Host Controller Interface driver
[    1.353715] sdhci: Copyright(c) Pierre Ossman
[    1.365042] sdhci-pltfm: SDHCI platform and OF driver helper
...
[    1.402850] mmc0: SDHCI controller on 42850000.mmc [42850000.mmc] using ADMA
[    1.525510] mmc0: new DDR MMC card at address 0001
[    1.532646] mmcblk0: mmc0:0001 DG4008 7.28 GiB 
[    1.543004]  mmcblk0: p1 p2
[    1.549076] mmcblk0boot0: mmc0:0001 DG4008 4.00 MiB 
[    1.557364] mmcblk0boot1: mmc0:0001 DG4008 4.00 MiB 
[    1.566409] mmcblk0rpmb: mmc0:0001 DG4008 4.00 MiB, chardev (234:0)
[    1.814684] sdhci-esdhc-imx 42860000.mmc: Got CD GPIO
[    1.851039] mmc1: SDHCI controller on 42860000.mmc [42860000.mmc] using ADMA
[    1.889752] mmc1: new high speed SDHC card at address 5048
[    1.900514] mmcblk1: mmc1:5048 SD32G 28.9 GiB 
[    1.906361]  mmcblk1: p1 p2
[    2.358195] EXT4-fs (mmcblk1p2): mounted filesystem with ordered data mode. Quota mode: none.
[    4.890543] EXT4-fs (mmcblk1p2): re-mounted. Quota mode: none.
...

Additional information[edit | edit source]

If are executed the boot with NFS the file system configuration does automatically mount the uSD partitions. 

root@desk-mx93:~# lsblk /dev/mmcblk1 
NAME        MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
mmcblk1     179:96   0 28.9G  0 disk 
|-mmcblk1p1 179:97   0 83.2M  0 part /run/media/boot-mmcblk1p1
`-mmcblk1p2 179:98   0  6.5G  0 part /run/media/root-mmcblk1p2
root@desk-mx93:~#
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