This commit improves the SDHost driver for RPi3 as following:
* Unblock MMC_CMD(17). Using MMC_CMD(17) is more efficient on
block reading.
* In some low probability that SEND_OP_COND might results CRC7
error. We can consider that the command runs correctly. We don't
need to retry this command so removing the code for retry.
* Using MMC_BUS_WIDTH_1 as MMC default value to improve the stability.
* Increase the clock to 50Mhz in data mode to speed up the io.
* Change the pull resistors configuration to gain more stability.
Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
This commit adds SDHost driver for RaspberryPi3. SDHost driver uses the
GPIO driver to connect the SDCard and SDHost. By using this driver it is
able to read/write raw blocks on SDCard.
Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
This commit adds GPIO driver for RaspberryPi3. The GPIO driver for RPi3
also provides the way to do pinmux selections.
Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
Ying-Chun Liu (PaulLiu)