Add the code to correctly handle 'cs_change' field in 'struct spi_transfer'(base on the similar code from altera_spi.c)
Signed-off-by: Andrey Smirnov <[email protected]> --- drivers/spi/imx_spi.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/spi/imx_spi.c b/drivers/spi/imx_spi.c index a1f19eb..e552d5f 100644 --- a/drivers/spi/imx_spi.c +++ b/drivers/spi/imx_spi.c @@ -29,6 +29,7 @@ #include <mach/generic.h> #include <linux/clk.h> #include <linux/err.h> +#include <clock.h> #define CSPI_0_0_RXDATA 0x00 #define CSPI_0_0_TXDATA 0x04 @@ -457,17 +458,34 @@ static int imx_spi_transfer(struct spi_device *spi, struct spi_message *mesg) { struct imx_spi *imx = container_of(spi->master, struct imx_spi, master); struct spi_transfer *t; + unsigned int cs_change; + const int nsecs = 50; imx->chipselect(spi, 1); + cs_change = 0; + mesg->actual_length = 0; list_for_each_entry(t, &mesg->transfers, transfer_list) { + if (cs_change) { + ndelay(nsecs); + imx->chipselect(spi, 0); + ndelay(nsecs); + imx->chipselect(spi, 1); + } + + cs_change = t->cs_change; + imx_spi_do_transfer(spi, t); mesg->actual_length += t->len; + + if (cs_change) + imx->chipselect(spi, 1); } - imx->chipselect(spi, 0); + if (!cs_change) + imx->chipselect(spi, 0); return 0; } -- 2.1.0 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
