diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-pxa2xx.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index af3f37ba82c83..259c20f7a542c 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1704,6 +1704,16 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) goto out_error_dma_irq_alloc; controller->max_speed_hz = clk_get_rate(ssp->clk); + /* + * Set minimum speed for all other platforms than Intel Quark which is + * able do under 1 Hz transfers. + */ + if (!pxa25x_ssp_comp(drv_data)) + controller->min_speed_hz = + DIV_ROUND_UP(controller->max_speed_hz, 4096); + else if (!is_quark_x1000_ssp(drv_data)) + controller->min_speed_hz = + DIV_ROUND_UP(controller->max_speed_hz, 512); /* Load default SSP configuration */ pxa2xx_spi_write(drv_data, SSCR0, 0); |