Hi, I'm working on the SPI bus on a Nvidia Tegra 2 system (Toradex Colibri). I'm using kernel 2.6.32 with toradex and nvidia patches. I need to use one of the Tegra SPI controller in Slave mode. I know that the Linux kernel does not support the Slave mode for SPI controllers, but I see the drivers/spi/spi_slave_tegra.c driver which is not documented and it is not commented, also the author name is missing. The only information available is the Nvidia Copyright 2011. Toradex does not tested the spi_slave_tegra and cannot provides an example of driver which use the spi_slave_tegra. I read the code and I see that spi_slave_tegra use the SPI framework also if the SPI framework supports only master controller. Anyone ever use the spi_slave_tegra? It works? Can you provide an example? As I understand: - obviously I must configure SPI before master start communication - speed_hz must be the same of the master - I must use spi_async (spi_sync can freeze the driver) - Only messages with single transfer. If the master sends messages with multiple transfer, I must receive them with a single transfer - I have two callback. the message->complete from the SPI framework and the spi_tegra_register_callback from the spi_slave_tegra Any suggestions, comments, opinions are welcome. Thank you for your help. -- Federico Vaga -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
