AM6526: How to configure eMMC clock to 100Mhz

JANAKIRAM NAGARURU

Part Number: AM6526

we are planning to change the default eMMC clock ( 200Mhz) to 100MHz. to identify one of the EMI issues.

0 Shiou Mei Huang over 2 years ago

Janakiram,

You can change the MMC clock divider in MMCSD0_CLOCK_CONTROL.

Best Regards,

Shiou Mei

0 JANAKIRAM NAGARURU over 2 years ago in reply to Shiou Mei Huang

can you please specify exactly location ? like file name and path

0 Shiou Mei Huang over 2 years ago in reply to JANAKIRAM NAGARURU

Janakiram,

That depends on the SW and revision you are using.

0 JANAKIRAM NAGARURU over 2 years ago in reply to Shiou Mei Huang

Hi Shiou Mei,

we are using SDK: 07_01_00_17 and H/W revision AM6526 revision 2.

can you please suggest location/filename.

Regards,

Janakiram

0 Shiou Mei Huang over 2 years ago in reply to JANAKIRAM NAGARURU

Janakiram,

Try add a new line under board config file's main_sdhci0() and define max-frequency = <100000000>;

For AM65x kernel, board config file is typically k3-am65-main.dtsi in the arch/arm64/boot/dts/ti/ directory.

Best Regards,

Shiou Mei

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