MMC SD card and pxa272 | |
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Hi Pierre, I have some problems with pxamci driver. I was hopping that kind of situation would remind you of something ... My test is simple : I want to copy 1 file, of about 15kB, between 2 partitions on my sd card, the source one is ext2, the destination fat16. The SD card is a Kingstom 1GB card (shouldn't be The SD card reader is interfaced with a Marvell pxa272 SoC. The driver used is naturally pxa2xx-mci. What bothers me is that it takes a very long time (here 2secs for 15kB), but that seems linear with the file size. What I see also is a lot of interrupts (see below) fired for that simple copy. Did you see that kind of behaviour before ? Cheers. -- Robert Testcase: ========= root@mioa701:~# ls -l licorne10.gif -rwxr-xr-x 1 root root 14961 Jun 2 11:51 licorne10.gif root@mioa701:~# date; cat /proc/interrupts | grep pxa2xx-mci; cp licorne10.gif /media/card/mp3; cat /proc/interrupts | grep pxa2xx-mci; date Thu Sep 4 20:28:45 CEST 2008 23: 111747 SC pxa2xx-mci 23: 149741 SC pxa2xx-mci Thu Sep 4 20:28:47 CEST 2008 ------------------------------------------------------------------- List admin: http://lists.arm.linux.org.uk/mailman/listinfo/linux-arm-kernel FAQ: http://www.arm.linux.org.uk/mailinglists/faq.php Etiquette: http://www.arm.linux.org.uk/mailinglists/etiquette.php
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