spi: pxa2xx: Allow number of chip select pins to be read from property

In some cases the number of the chip select pins might come from
the device property. Allow driver to use it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240417110334.2671228-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index 2f60b2fde8d5059445898d28432e117cde9eb873..ab6fd55237cd1dbf52c3ed70aa8bdc7b688b0894 100644 (file)
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1357,6 +1357,7 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
        struct ssp_device *ssp = NULL;
        const void *match;
        bool is_lpss_priv;
+       u32 num_cs = 1;
        int status;
 
        is_lpss_priv = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpss_priv");
@@ -1395,8 +1396,11 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
                pdata->dma_filter = pxa2xx_spi_idma_filter;
        }
 
+       /* Read number of chip select pins, if provided */
+       device_property_read_u32(dev, "num-cs", &num_cs);
+
+       pdata->num_chipselect = num_cs;
        pdata->is_target = device_property_read_bool(dev, "spi-slave");
-       pdata->num_chipselect = 1;
        pdata->enable_dma = true;
        pdata->dma_burst_size = 1;