mfd: Allow mapping regulator supplies to MFD device from children
Occasionally, it is useful to map supplies from a child device onto the
MFD device. A typical usecase for this would be if the MFD device is
represented as a single node in device tree. All supplies will be
defined in device tree as existing on the MFD device. When a child
depends on frameworks which might have no knowledge of MFD to lookup
supplies on its behalf the supply will not be found.
This patch adds a list of supplies that should be looked up on the
parent rather than the child as part of the mfd_cell structure.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h
index cebe97e..7314fc4 100644
--- a/include/linux/mfd/core.h
+++ b/include/linux/mfd/core.h
@@ -59,6 +59,12 @@
* pm_runtime_no_callbacks().
*/
bool pm_runtime_no_callbacks;
+
+ /* A list of regulator supplies that should be mapped to the MFD
+ * device rather than the child device when requested
+ */
+ const char **parent_supplies;
+ int num_parent_supplies;
};
/*