diff options
Diffstat (limited to 'drivers/spi/spi-dw-mmio.c')
| -rw-r--r-- | drivers/spi/spi-dw-mmio.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c index 9af56cdf154..a5cba14ac3d 100644 --- a/drivers/spi/spi-dw-mmio.c +++ b/drivers/spi/spi-dw-mmio.c @@ -16,6 +16,7 @@ #include <linux/spi/spi.h> #include <linux/scatterlist.h> #include <linux/module.h> +#include <linux/of_gpio.h> #include "spi-dw.h" @@ -66,10 +67,31 @@ static int dw_spi_mmio_probe(struct platform_device *pdev) if (ret) return ret; - dws->bus_num = 0; + dws->bus_num = pdev->id; dws->num_cs = 4; dws->max_freq = clk_get_rate(dwsmmio->clk); + if (pdev->dev.of_node) { + int i; + + for (i = 0; i < dws->num_cs; i++) { + int cs_gpio = of_get_named_gpio(pdev->dev.of_node, + "cs-gpios", i); + + if (cs_gpio == -EPROBE_DEFER) { + ret = cs_gpio; + goto out; + } + + if (gpio_is_valid(cs_gpio)) { + ret = devm_gpio_request(&pdev->dev, cs_gpio, + dev_name(&pdev->dev)); + if (ret) + goto out; + } + } + } + ret = dw_spi_add_host(&pdev->dev, dws); if (ret) goto out; |