Add a helper macro to enable the interation over all supported GPIO
suffixes (currently "gpios" & "gpio"). This will be used by the serial
mctrl code to check, if a GPIO property exists before requesting it.
Signed-off-by: Stefan Roese <sr@xxxxxxx>
Suggested-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpio/gpiolib.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
index 7c52c2442173..a3add73f99d6 100644
--- a/drivers/gpio/gpiolib.h
+++ b/drivers/gpio/gpiolib.h
@@ -92,6 +92,12 @@ struct acpi_gpio_info {
/* gpio suffixes used for ACPI and device tree lookup */
static __maybe_unused const char * const gpio_suffixes[] = { "gpios", "gpio" };
+#define for_each_gpio_suffix(idx, suffix) \
+ for (idx = 0; \
+ idx < ARRAY_SIZE(gpio_suffixes) && \
+ (suffix = gpio_suffixes[idx]) != NULL; \
+ idx++)
+
#ifdef CONFIG_OF_GPIO
struct gpio_desc *of_find_gpio(struct device *dev,
const char *con_id,
--
2.22.0
