> -----Original Message----- > From: Paul Walmsley [mailto:paul@xxxxxxxxx] > Sent: Thursday, February 18, 2010 2:21 PM > To: Madhusudhan > Cc: 'David Vrabel'; sakoman@xxxxxxxxx; r-woodruff2@xxxxxx; sawant@xxxxxx; > linux-mmc@xxxxxxxxxxxxxxx; linux-omap@xxxxxxxxxxxxxxx > Subject: RE: [PATCH 3/3] mmc: omap_hsmmc: enable SDIO card interrupts > > Hi, > > (cc'ing Steve, Richard, Anand) > > On Thu, 18 Feb 2010, Madhusudhan wrote: > > > Not to add further confusion but as far as I understand SDIO should be > > able to asynchronously wakeup OMAP regardless of MMC clocks being OFF . > > As per the SDIO spec DAT1 line is used for signaling the card interrupt > > to the host. The TRM clearly shows a GPIO connected to DAT1 line for > > wakeup through the SDIO interrupt. Wouldn't this help? > > Is the integration code in arch/arm/*omap* set to enable wakeup on the > DAT1 ball on the OMAP? I don't see any trace of that in the code. That > would surely prevent wakeup from succeeding on an off-mode enabled kernel. > Sounds like there may be other problems. Why not give it a try with an > SDIO card and see if you can get it to work? > > > Definitely these are good features that are being added. Just that there > > are confusions around and not everyone has a setup to validate these > > features. > > Hopefully someone inside TI is validating SDIO wakeup on Linux? > > > If I look in the mainline kernel today there is only one SDIO card > > driver " sdio_uart.c". > > [paul@twilight current]$ find . -name "*sdio*c" -print | fgrep -v /core/ > ./drivers/ssb/sdio.c > ./drivers/bluetooth/btsdio.c > ./drivers/bluetooth/btmrvl_sdio.c > ./drivers/mmc/host/mvsdio.c > ./drivers/net/wimax/i2400m/sdio-rx.c > ./drivers/net/wimax/i2400m/sdio-tx.c > ./drivers/net/wimax/i2400m/sdio.c > ./drivers/net/wimax/i2400m/sdio-fw.c > ./drivers/net/wireless/iwmc3200wifi/sdio.c > ./drivers/net/wireless/libertas/if_sdio.c > ./drivers/net/wireless/wl12xx/wl1251_sdio.c > ./drivers/net/wireless/b43/sdio.c > ./drivers/media/dvb/siano/smssdio.c > [paul@twilight current]$ > > There appear to be least seven SDIO card drivers in 2.6.34-rc7. At least > one of these is for a TI chip - the wl1251. I think some of the > Gumstix Overo OMAP3 boards are using an SDIO-connected Marvell Libertas: > > http://www.gumstix.com/store/catalog/product_info.php?products_id=252 > > David is probably testing with a Bluetooth card - maybe he can comment > further. > > > And at least I don't see a way I can test any of these features myself. > > Could you clarify? > I meant that right now I am not equipped with a setup that has a SDIO device that works to a level that this wakeup feature can be validated. Regards, Madhu > > - Paul -- 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
