On Wed, Nov 08, 2017 at 07:17:00PM +0900, Masahiro Yamada wrote: > A card detect GPIO is set up only for platforms with "cd-gpios" > DT property or TMIO_MMC_USE_GPIO_CD flag. However, the driver > core always uses mmc_gpio_get_cd, which just fails with -ENOSYS > if ctx->cd_gpio is unset. > > The bit 5 of the status register provides the current signal level > of the CD line. Allow to use it if the GPIO is unused. I might be missing something: Why do we need to report something sensible in this case? The card insert/eject interrupts calling mmc_detect_change is not enough?
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