> Eric Anholt <eric@xxxxxxxxxx> hat am 1. März 2017 um 20:31 geschrieben: > > > Stefan Wahren <stefan.wahren@xxxxxxxx> writes: > > >> Eric Anholt <eric@xxxxxxxxxx> hat am 1. März 2017 um 19:00 geschrieben: > >> > >> > >> Gerd Hoffmann <kraxel@xxxxxxxxxx> writes: > >> > >> > From: Eric Anholt <eric@xxxxxxxxxx> > >> > > >> > The 2835 has two SD controllers: The Arasan sdhci controller (supported > >> > by the iproc driver) and a custom sdhost controller. This patch adds a > >> > driver for the latter. > >> > > >> > The sdhci controller supports both sdcard and sdio. The sdhost > >> > controller supports the sdcard only, but has better performance. Also > >> > note that the rpi3 has sdio wifi, so driving the sdcard with the sdhost > >> > controller allows to use the sdhci controller for wifi support. > >> > > >> > The configuration is done by devicetree via pin muxing. Both SD > >> > controller are available on the same pins (2 pin groups = pin 22 to 27 + > >> > pin 48 to 53). So it's possible to use both SD controllers at the same > >> > time with different pin groups. > >> > > >> > The code was originally written by Phil Elwell in the downstream > >> > Rasbperry Pi tree, and I did a major cleanup on it (+319, -707 lines > >> > out of the original 2055) for inclusion. > >> > > >> > Signed-off-by: Eric Anholt <eric@xxxxxxxxxx> > >> > >> Ulf, what do you need done to this driver patch before it can go in? > >> The commit message seems like it could use some rewriting at this point > >> (Personally I would drop the detailed changelogs from Stefan and Gerd, > >> updating the last paragraph here to give them credit), but what's > >> important to me is getting the driver in so that distros don't have to > >> carry this patch for wifi support. > > > > I'm still working on 3 small patches for this driver: > > > > 1. trivial error in a register comment > > 2. ignore SDCMD_FAIL_FLAG during bcm2835_finish_command (downstream [1]) > > 3. remove unnecessary call to bcm2835_reset_internal > > > > I plan to submit them on Friday. > > > > [1] - https://github.com/raspberrypi/linux/commit/711cade866c9f865f9b283c9369e9486f27d1fec > > Should any of those changes block merging the current code, though? No, but the recursion about bcm2835_finish_command() and bcm2835_transfer_complete() is still there. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
