Searched hist:277307 (Results 1 - 3 of 3) sorted by relevance
| /freebsd-11-stable/sys/arm/broadcom/bcm2835/ | ||
| H A D | bcm2835_sdhci.c | diff 277307 Sat Jan 17 18:06:27 MST 2015 ian Add a new SDHCI quirk, SDHCI_QUIRK_DONT_SET_HISPD_BIT. Apparently some sdhci controllers, such as the one on a Raspberry Pi, mishandle the signal timing in high speed signaling mode, but run just fine in standard mode with the bus running at frequencies between 25-50MHz (which shouldn't work). This is the solution adopted by U-Boot and other OSes (linux and *BSD) for the timeouts on Raspberry Pi boards with certain SD cards. Some research shows that this quirk is also used on a few other boards, so the fix is a generic quirk instead of being in the RPi-specific driver code. This change is based on information discovered by Michal Meloun. |
| /freebsd-11-stable/sys/dev/sdhci/ | ||
| H A D | sdhci.h | diff 277307 Sat Jan 17 18:06:27 MST 2015 ian Add a new SDHCI quirk, SDHCI_QUIRK_DONT_SET_HISPD_BIT. Apparently some sdhci controllers, such as the one on a Raspberry Pi, mishandle the signal timing in high speed signaling mode, but run just fine in standard mode with the bus running at frequencies between 25-50MHz (which shouldn't work). This is the solution adopted by U-Boot and other OSes (linux and *BSD) for the timeouts on Raspberry Pi boards with certain SD cards. Some research shows that this quirk is also used on a few other boards, so the fix is a generic quirk instead of being in the RPi-specific driver code. This change is based on information discovered by Michal Meloun. |
| H A D | sdhci.c | diff 277307 Sat Jan 17 18:06:27 MST 2015 ian Add a new SDHCI quirk, SDHCI_QUIRK_DONT_SET_HISPD_BIT. Apparently some sdhci controllers, such as the one on a Raspberry Pi, mishandle the signal timing in high speed signaling mode, but run just fine in standard mode with the bus running at frequencies between 25-50MHz (which shouldn't work). This is the solution adopted by U-Boot and other OSes (linux and *BSD) for the timeouts on Raspberry Pi boards with certain SD cards. Some research shows that this quirk is also used on a few other boards, so the fix is a generic quirk instead of being in the RPi-specific driver code. This change is based on information discovered by Michal Meloun. |
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