> 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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
