On 14 May 2010 14:04, Grazvydas Ignotas <notasas@xxxxxxxxx> wrote: > Hi Kalle, Hi Grazvydas, > On Wed, Apr 28, 2010 at 12:18 AM, Grazvydas Ignotas <notasas@xxxxxxxxx> wrote: >> SDIO specification allows RAW (Read after Write) operation using >> IO_RW_DIRECT command (CMD52) by setting the RAW bit. This operation is >> similar to ordinary read/write commands, except that both write and read >> are performed using single command/response pair. The Linux SDIO layer >> already supports this internaly, only external function is missing for >> drivers to make use, which is added by this patch. >> >> This type of command is required to implement proper power save mode >> support in wl1251 wifi driver. > > As wl1251 maintainer, can you confirm this is needed for wl1251 driver > to function in SDIO mode? Perhaps this could help convince Andrew to > merge this patch. Without this the chip is having problems leaving ELP > mode. Yes, this is needed for wl1251 (and I would assume also for wl1271) to wake up firmware from it's sleep state, also called as the ELP mode. A TI engineer has confirmed this for me. Kalle -- 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
