Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock,
and enables SDIO via GPIOs 22-27.
Load: dtoverlay=sdio,<param>=<val>
-Params: overclock_50 SD Clock (in MHz) to use when the MMC framework
- requests 50MHz
-
- sdio_overclock SDIO Clock (in MHz) to use when the MMC
+Params: sdio_overclock SDIO Clock (in MHz) to use when the MMC
framework requests 50MHz
- force_pio Disable DMA support (default off)
-
- pio_limit Number of blocks above which to use DMA
- (default 1)
-
- debug Enable debug output (default off)
-
poll_once Disable SDIO-device polling every second
(default on: polling once at boot-time)
Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock,
and enables 1-bit SDIO via GPIOs 22-25.
Load: dtoverlay=sdio-1bit,<param>=<val>
-Params: overclock_50 SD Clock (in MHz) to use when the MMC framework
- requests 50MHz
-
- sdio_overclock SDIO Clock (in MHz) to use when the MMC
+Params: sdio_overclock SDIO Clock (in MHz) to use when the MMC
framework requests 50MHz
- force_pio Disable DMA support (default off)
-
- pio_limit Number of blocks above which to use DMA
- (default 1)
-
- debug Enable debug output (default off)
-
poll_once Disable SDIO-device polling every second
(default on: polling once at boot-time)