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-rw-r--r--include/linux/gpio/driver.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 9c1fbfaebaa8..175129a92656 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -552,6 +552,21 @@ DEFINE_CLASS(_gpiochip_for_each_data,
const char **label, int *i)
/**
+ * for_each_hwgpio - Iterates over all GPIOs for given chip.
+ * @_chip: Chip to iterate over.
+ * @_i: Loop counter.
+ * @_label: Place to store the address of the label if the GPIO is requested.
+ * Set to NULL for unused GPIOs.
+ */
+#define for_each_hwgpio(_chip, _i, _label) \
+ for (CLASS(_gpiochip_for_each_data, _data)(&_label, &_i); \
+ *_data.i < _chip->ngpio; \
+ (*_data.i)++, kfree(*(_data.label)), *_data.label = NULL) \
+ if (IS_ERR(*_data.label = \
+ gpiochip_dup_line_label(_chip, *_data.i))) {} \
+ else
+
+/**
* for_each_requested_gpio_in_range - iterates over requested GPIOs in a given range
* @_chip: the chip to query
* @_i: loop variable