Enable SPI SDHC driver to manage card power via pwr-gpios property.
Control for this property was previously partially implemented. When
this property is present, the SPI SDHC driver will use it to control
power to the SD card.
Power is toggled during SD init, so this power control can make SD init
more reliable as the power toggle will insure the SD card state is reset.
Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
Make it possible to use CPOL/CPHA SPI clock modes with the SDHC driver.
Some cards require the clock to switch to low when not active.
Signed-off-by: Łukasz Hejnak (LeHack) <lehack-ghub@lehack.pl>
Add support for configuring power on delay when using SPI SDHC. This
allows cards that reliably initialize with a shorter (1ms) delay to
avoid the long initialize delay otherwise imposed.
Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
The sdhc-spi-slot requies an spi bus, but sd nodes (like sdmmc-disk)
cannot be added to it without a warning because it does not declare an
sd bus.
Signed-off-by: JP Sugarbroad <jpsugar@amazon.com>
Add SDHC driver implementing spi mode support for SD cards. This driver
implements the standard SD host controller APIs, and sets the host
property "is_spi" to indicate to the SD subsystem the card will be
running in SPI mode.
Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
