On Mon, Dec 5, 2011 at 10:23 AM, <r66093@xxxxxxxxxxxxx> wrote: > From: Jerry Huang <Chang-Ming.Huang@xxxxxxxxxxxxx> > > Before running get_cd() recall function to detect whether the card is > present, must make sure the power is up. (...) > + mmc_power_up(host); > if (host->ops->get_cd && host->ops->get_cd(host) == 0) > goto out; > + mmc_power_off(host); NAK, I don't get it. mmc_power_up() mmc_power_off() is about powering up/down the *card*. If you need to read a register in your MMC host or so, control power and clocking of your silicon in the driver itself. You can use runtime PM or whatever including explicit clk_enable()/clk_disable() etc. I have a strong feeling that the bug you're trying to fix is in the host controller you're using, not in the MMC core. Yours, Linus Walleij -- 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
