Messages in this thread Patch in this message |  | | From | Mika Westerberg <> | Subject | [PATCH 09/11] spi/pxa2xx: add support for SPI_LOOP | Date | Mon, 7 Jan 2013 12:44:38 +0200 |
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This is useful when testing the functionality of the controller from userspace and there aren't any real SPI slave devices connected to the bus.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> --- drivers/spi/spi-pxa2xx.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index f36d7c3..cfc4444 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1813,6 +1813,9 @@ static int setup(struct spi_device *spi) chip->cr1 |= (((spi->mode & SPI_CPHA) != 0) ? SSCR1_SPH : 0) | (((spi->mode & SPI_CPOL) != 0) ? SSCR1_SPO : 0); + if (spi->mode & SPI_LOOP) + chip->cr1 |= SSCR1_LBM; + /* NOTE: PXA25x_SSP _could_ use external clocking ... */ if (!pxa25x_ssp_comp(drv_data)) dev_dbg(&spi->dev, "%ld Hz actual, %s\n", @@ -1906,7 +1909,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) master->dev.parent = &pdev->dev; master->dev.of_node = pdev->dev.of_node; /* the spi->mode bits understood by this driver: */ - master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; + master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP; master->bus_num = ssp->port_id; master->num_chipselect = platform_info->num_chipselect; -- 1.7.10.4
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