0217-BCM270X_DT-Document-hazards-of-sdhost-overlay.patch 1.5 KB

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  1. From 8cbaec5167f764d2c7b88c2f465970fd08c55582 Mon Sep 17 00:00:00 2001
  2. From: Phil Elwell <phil@raspberrypi.org>
  3. Date: Wed, 30 Mar 2016 17:07:15 +0100
  4. Subject: [PATCH 217/381] BCM270X_DT: Document hazards of sdhost overlay
  5. Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  6. ---
  7. arch/arm/boot/dts/overlays/README | 8 +++++++-
  8. 1 file changed, 7 insertions(+), 1 deletion(-)
  9. --- a/arch/arm/boot/dts/overlays/README
  10. +++ b/arch/arm/boot/dts/overlays/README
  11. @@ -712,7 +712,11 @@ Params: <None>
  12. Name: sdhost
  13. -Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock
  14. +Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock.
  15. + N.B. This overlay is designed for situations where the mmc driver is
  16. + the default, so it disables the other (mmc) interface - this will kill
  17. + WiFi on a Pi3. If this isn't what you want, either use the sdtweak
  18. + overlay or the new sd_* dtparams of the base DTBs.
  19. Load: dtoverlay=sdhost,<param>=<val>
  20. Params: overclock_50 Clock (in MHz) to use when the MMC framework
  21. requests 50MHz
  22. @@ -771,6 +775,8 @@ Params: overclock_50 SD Clock
  23. Name: sdtweak
  24. Info: Tunes the bcm2835-sdhost SD/MMC driver
  25. + N.B. This functionality is now available via the sd_* dtparams in the
  26. + base DTB.
  27. Load: dtoverlay=sdtweak,<param>=<val>
  28. Params: overclock_50 Clock (in MHz) to use when the MMC framework
  29. requests 50MHz