I need to build u-boot with support for sdcard on-board our TLL6527M platform (assuming the u-boot has support for sdcard over SPI bus on a blackfin based system). The SDCARD is connected on the spi bus and gpio PH12 is being used for chip select.
1. What are the steps to enable sdcard support while building u-boot? Specifically, where to map the correct chip select? I saw this wiki page http://docs.blackfin.uclinux.org/doku.php?id=bootloaders:u-boot:mmc. It talks about usage but not about building support for it in u-boot.
2. Is it possible to map a GPIO instead of native SSEL signals of the blackfin SPI controller as chip select for sdcard in uboot?
Thanks & regards,