Hi All,
This patch series adds support for the eSPI controller found on the newer range of Freescale SoCs including the 85xx, P1/P2xx (and I believe the P4xx) series. The reason this is an RFC is that unfortunately the hardware on these chips does not permit indefinite SPI transactions on a given chip select. A chip select is asserted only when a 'transaction length' has been passed to the controller. Once the number of characters specified in the transaction length have been transmitted, the controller decides that the 'frame' has ended and de-asserts the chip select after a defined delay. It is not possible to initiate a second transfer without re-initialising the command register, and hence clearing and re-asserting a chip select signal. This patch set addresses the issue by defining a read/write function in the spi_flash_internal API. Subsequent patches add the freescale eSPI driver and add support for it in the spansion driver and the P1/P2 board configuration header. I'm pretty sure that there are better ways of doing this, especially if a driver model with support for driver quirks was implemented for instance. Until then however, I assume having some sort of ability to use the SPI controller on these boards would be better than not being able to do anything at all. If anyone has a better solution please feel free to comment. Regards, Can -- drivers/mtd/spi/spansion.c | 60 ++++++++- drivers/mtd/spi/spi_flash.c | 38 +++++- drivers/mtd/spi/spi_flash_internal.h | 9 ++ drivers/spi/Makefile | 1 + drivers/spi/fsl_espi.c | 251 ++++++++++++++++++++++++++++++++++ include/configs/P1_P2_RDB.h | 18 +++ include/fsl_espi.h | 50 +++++++ 7 files changed, 419 insertions(+), 8 deletions(-) mode change 100644 => 100755 drivers/mtd/spi/spansion.c mode change 100644 => 100755 drivers/mtd/spi/spi_flash.c mode change 100644 => 100755 drivers/mtd/spi/spi_flash_internal.h create mode 100755 drivers/spi/fsl_espi.c create mode 100755 include/fsl_espi.h _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
