Date: Sun, 18 Jan 2015 17:03:12 +0900 From: "Daisuke Aoyama" <aoyama@peach.ne.jp> To: <freebsd-arm@freebsd.org> Subject: HS mode in RPi Message-ID: <AF35369EC7D84B59A5BBAADD77DC1687@ad.peach.ne.jp>
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Hi, r277307 add bcm2835_sdhci_hs=1, but this is wrong. It does not cover HS problem. The quirk and HS switching is not same. It's only one of problems on some SD card. I'm using bcm2835_sdhci_hispd_bit but this may not useful. HS mode on emmc=100MHz and core=250MHz cause SD card corruption. To avoid clock domain crossing, you need emmc=250MHz and bcm2835_sdhci_hs=1. But emmc=250MHz means running as 41MHz on HS mode(250MHz / 2N divider). However, it seems Linux use emmc=250MHz by default. I suggest use emmc=250MHz or keep bcm2835_sdhci_hs=0 by default at this time. Regards, -- Daisuke Aoyama
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