Linux/LINUXSDK-OMAPL138: SATA turn off

Risto Hedman

Part Number: LINUXSDK-OMAPL138
Other Parts Discussed in Thread: OMAPL138

Tool/software: Linux

Hi,

I'm measuring 100mA current in 1.2V line to OMAPL138. Not much but when produced with LDO, heat generation is remarkable. In power spreadsheet I switched SATA off and 1.2V consumption dropped significantly. Currently I'm not using SATA; there is 100MHz clock active input for future use.

Is it possible to turn SATA off in kernel or in user level, I could not find anything related?

BR, risto

over 8 years ago

0 Cvetolin Shulev-XID over 8 years ago

TI__Guru 65405 points

Hi Risto,

I've forwarded this to the OMAP-L13x software experts. Their feedback should be posted here.

BR
Tsvetolin Shulev

0 Risto Hedman over 8 years ago in reply to Cvetolin Shulev-XID

Expert 1770 points

Hi Tsvetolin,

Thank you. I've just tested to turn SATA off with AISgen and then booted the board with this new u-boot.ais . I think kernel forces SATA again on while booting.

risto

0 Risto Hedman over 8 years ago in reply to Risto Hedman

Expert 1770 points

Hi,

There was "da850_register_sata(DA850EVM_SATA_REFCLKPN_RATE); " in board configuration file - removing it reduced 1.2V cnsumption by 90%

risto

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Linux/LINUXSDK-OMAPL138: SATA turn off