commit 69511a452e6dc6b74fe4f3671a51b1b44b9c57e3
author Rajendra Nayak <rnayak@ti.com> Fri Nov 18 16:47:20 2011 +0530
committer Mark Brown <broonie@opensource.wolfsonmicro.com> Wed Nov 23 18:47:31 2011 +0000
tree 486fe8a536a367c0e83f55a97103a1a527a7e2bf
parent 2c043bcbf287dc69848054d5c02c55c20f7a7bc5

regulator: map consumer regulator based on device tree

Device nodes in DT can associate themselves with one or more
regulators/supply by providing a list of phandles (to regulator nodes)
and corresponding supply names.

For Example:
	devicenode: node@0x0 {
		...
		...
		vmmc-supply = <&regulator1>;
		vpll-supply = <&regulator2>;
	};

The driver would then do a regulator_get(dev, "vmmc"); to get
regulator1 and do a regulator_get(dev, "vpll"); to get
regulator2.

of_get_regulator() extracts the regulator node for a given
device, based on the supply name.

Use it to look up the regulator for a given consumer from device tree, during
a regulator_get(). If not found fallback and lookup through
the regulator_map_list instead.

Also, since the regulator dt nodes can use the same binding to
associate with a parent regulator/supply, allow the drivers to
specify a supply_name, which can then be used to lookup dt
to find the parent phandle.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

include/linux/regulator/driver.h

diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 8fbb696..4214b9a 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -154,6 +154,7 @@
  * this type.
  *
  * @name: Identifying name for the regulator.
+ * @supply_name: Identifying the regulator supply
  * @id: Numerical identifier for the regulator.
  * @n_voltages: Number of selectors available for ops.list_voltage().
  * @ops: Regulator operations table.
@@ -163,6 +164,7 @@
  */
 struct regulator_desc {
 	const char *name;
+	const char *supply_name;
 	int id;
 	unsigned n_voltages;
 	struct regulator_ops *ops;