regulator: Clarify documentation for regulator-regulator supplies

The mechanism used for connecting regulators together when one regulator
supplies another wasn't clear as the names being used weren't really tied
together well.

Reported-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/Documentation/power/regulator/machine.txt b/Documentation/power/regulator/machine.txt
index 311c61f..ce63af0 100644 (file)
--- a/Documentation/power/regulator/machine.txt
+++ b/Documentation/power/regulator/machine.txt
@@ -43,6 +43,7 @@ to their supply regulator :-
 
 static struct regulator_init_data regulator1_data = {
        .constraints = {
+               .name = "Regulator-1",
                .min_uV = 3300000,
                .max_uV = 3300000,
                .valid_modes_mask = REGULATOR_MODE_NORMAL,
@@ -51,13 +52,19 @@ static struct regulator_init_data regulator1_data = {
        .consumer_supplies = regulator1_consumers,
 };
 
+The name field should be set to something that is usefully descriptive
+for the board for configuration of supplies for other regulators and
+for use in logging and other diagnostic output.  Normally the name
+used for the supply rail in the schematic is a good choice.  If no
+name is provided then the subsystem will choose one.
+
 Regulator-1 supplies power to Regulator-2. This relationship must be registered
 with the core so that Regulator-1 is also enabled when Consumer A enables its
 supply (Regulator-2). The supply regulator is set by the supply_regulator
-field below:-
+field below and co:-
 
 static struct regulator_init_data regulator2_data = {
-       .supply_regulator = "regulator_name",
+       .supply_regulator = "Regulator-1",
        .constraints = {
                .min_uV = 1800000,
                .max_uV = 2000000,