2008-01-31 03:13:45     2.6.24 new spi mmc layer

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2008-01-31 03:13:45     2.6.24 new spi mmc layer

Vitja Makarov (RUSSIAN FEDERATION)

Message: 50418    Hi, all!

 

New linux kernel has support for spi-mmc out of the box

 

more info can be found here:

http://kernelnewbies.org/Linux_2_6_24#head-b11faf7df86672a665b8f4cce03f8c42b712f475

 

Has anyone tried it?

 

vitja.

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2008-01-31 04:37:41     Re: 2.6.24 new spi mmc layer

Bryan Wu (CHINA)

Message: 50421    I will update our svn tree from 2.6.22.y to 2.6.24 these days.

When it's finished, you can try.

 

-Bryan

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2008-02-05 03:14:35     Re: 2.6.24 new spi mmc layer

Vitja Makarov (RUSSIAN FEDERATION)

Message: 50671    The one problem still exists. Only one spi device could be connected to the bus.

Due to spi framework problems. There should be a way to lock bus to get exclusive access to it.

So you should have a way to do few transfers with cs asserted. It seems that someday that will be done in mainline kernel.

 

vitja.

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2008-02-05 10:24:35     Re: 2.6.24 new spi mmc layer

Mike Frysinger (UNITED STATES)

Message: 50698    you can already do multiple transactions in one go with the SPI framework ... just use the message functions to queue up the related pieces before sending it out instead of using spi_read/spi_write

 

the CS behavior too can be controlled on a per-device or per-transfer setting

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