Messages in this thread Patch in this message | | | From | Girish K S <> | Subject | [PATCH V3 3/5] spi: s3c64xx: Added provision for non-gpio i/o's | Date | Wed, 13 Mar 2013 12:13:32 +0530 |
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From: Girish K S <girishks2000@gmail.com>
Currently the drivers supports only the GPIO based i/o pins. But there are Exynos SoC's that use the same controller with dedicated i/o pins.
This patch provides provision to support gpio/dedicated pins. The decision is made by parsing the "gpios" property in the spi node.
Signed-off-by: Girish K S <ks.giri@samsung.com> --- drivers/spi/spi-s3c64xx.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 054b8d4..94716d1 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -1112,6 +1112,9 @@ static int s3c64xx_spi_parse_dt_gpio(struct s3c64xx_spi_driver_data *sdd) struct device *dev = &sdd->pdev->dev; int idx, gpio, ret; + if (!of_find_property(dev->of_node, "gpios", NULL)) + return 0; + /* find gpios for mosi, miso and clock lines */ for (idx = 0; idx < 3; idx++) { gpio = of_get_gpio(dev->of_node, idx); @@ -1138,6 +1141,11 @@ free_gpio: static void s3c64xx_spi_dt_gpio_free(struct s3c64xx_spi_driver_data *sdd) { unsigned int idx; + struct device *dev = &sdd->pdev->dev; + + if (!of_find_property(dev->of_node, "gpios", NULL)) + return; + for (idx = 0; idx < 3; idx++) gpio_free(sdd->gpios[idx]); } -- 1.8.0
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