linux-kernel - [PATCH 4/8] regulator: arizona-ldo1: Add processing of init

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Date:	Tue, 18 Mar 2014 10:49:13 +0000
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	broonie@...nel.org
Cc:	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	rob@...dley.net, sameo@...ux.intel.com, lee.jones@...aro.org,
	lgirdwood@...il.com, patches@...nsource.wolfsonmicro.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/8] regulator: arizona-ldo1: Add processing of init_data from device tree

Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
---
 Documentation/devicetree/bindings/mfd/arizona.txt |    7 +++++
 drivers/regulator/arizona-ldo1.c                  |   26 +++++++++++++++++++++
 2 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/arizona.txt b/Documentation/devicetree/bindings/mfd/arizona.txt
index 36a0c3d..d78f1aa 100644
--- a/Documentation/devicetree/bindings/mfd/arizona.txt
+++ b/Documentation/devicetree/bindings/mfd/arizona.txt
@@ -42,6 +42,13 @@ Optional properties:
     the chip default will be used.  If present exactly five values must
     be specified.
 
+  - wlf,ldo1 : Initial data for the LDO1 regulator, as covered in
+    Documentation/devicetree/bindings/regulator/regulator.txt
+
+  - DCVDD-supply : Power supply, only needs to be specified if DCVDD is being
+    externally supplied. As covered in
+    Documentation/devicetree/bindings/regulator/regulator.txt
+
 Example:
 
 codec: wm5102@1a {
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
index 6379fd3..a67013f 100644
--- a/drivers/regulator/arizona-ldo1.c
+++ b/drivers/regulator/arizona-ldo1.c
@@ -19,6 +19,7 @@
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
 #include <linux/gpio.h>
 #include <linux/slab.h>
 
@@ -184,9 +185,34 @@ static const struct regulator_init_data arizona_ldo1_default = {
 static int arizona_ldo1_get_pdata(struct arizona *arizona,
 				  struct regulator_config *config)
 {
+	struct arizona_pdata *pdata = &arizona->pdata;
+	struct arizona_ldo1 *ldo1 = config->driver_data;
+	struct device_node *np_init, *np_dcvdd;
+
 	arizona_of_get_named_gpio(arizona, "wlf,ldoena", true,
 				  &config->ena_gpio);
 
+	np_init = of_get_child_by_name(arizona->dev->of_node, "wlf,ldo1");
+	np_dcvdd = of_parse_phandle(arizona->dev->of_node, "DCVDD-supply", 0);
+
+	if (np_init) {
+		config->of_node = np_init;
+
+		pdata->ldo1 = of_get_regulator_init_data(arizona->dev, np_init);
+
+		if (np_dcvdd) {
+			if (np_dcvdd != np_init)
+				arizona->external_dcvdd = true;
+		} else {
+			pdata->ldo1->consumer_supplies = &ldo1->supply;
+			pdata->ldo1->num_consumer_supplies = 1;
+		}
+
+		config->init_data = pdata->ldo1;
+	} else if (np_dcvdd) {
+		arizona->external_dcvdd = true;
+	}
+
 	return 0;
 }
 #else
-- 
1.7.2.5

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