linux-kernel - [PATCH 2/2] regulator: qcom-rpm: Implement set

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Date:	Wed, 11 Feb 2015 19:39:13 -0800
From:	Bjorn Andersson <bjorn.andersson@...ymobile.com>
To:	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
CC:	<linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>
Subject: [PATCH 2/2] regulator: qcom-rpm: Implement set_load and enable drms

Pass the requested load directly to the rpm.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
---
 drivers/regulator/qcom_rpm-regulator.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/regulator/qcom_rpm-regulator.c b/drivers/regulator/qcom_rpm-regulator.c
index 8364ff3..bab35c6 100644
--- a/drivers/regulator/qcom_rpm-regulator.c
+++ b/drivers/regulator/qcom_rpm-regulator.c
@@ -388,6 +388,28 @@ static int rpm_reg_is_enabled(struct regulator_dev *rdev)
 	return vreg->is_enabled;
 }
 
+static int rpm_reg_set_load(struct regulator_dev *rdev, int load_uA)
+{
+	struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
+	const struct rpm_reg_parts *parts = vreg->parts;
+	const struct request_member *req = &parts->ia;
+	int load_mA = load_uA / 1000;
+	int max_mA = req->mask >> req->shift;
+	int ret;
+
+	if (req->mask == 0)
+		return -EINVAL;
+
+	if (load_mA > max_mA)
+		load_mA = max_mA;
+
+	mutex_lock(&vreg->lock);
+	ret = rpm_reg_write(vreg, req, load_mA);
+	mutex_unlock(&vreg->lock);
+
+	return ret;
+}
+
 static struct regulator_ops uV_ops = {
 	.list_voltage = regulator_list_voltage_linear_range,
 
@@ -397,6 +419,8 @@ static struct regulator_ops uV_ops = {
 	.enable = rpm_reg_uV_enable,
 	.disable = rpm_reg_uV_disable,
 	.is_enabled = rpm_reg_is_enabled,
+
+	.set_load = rpm_reg_set_load,
 };
 
 static struct regulator_ops mV_ops = {
@@ -408,6 +432,8 @@ static struct regulator_ops mV_ops = {
 	.enable = rpm_reg_mV_enable,
 	.disable = rpm_reg_mV_disable,
 	.is_enabled = rpm_reg_is_enabled,
+
+	.set_load = rpm_reg_set_load,
 };
 
 static struct regulator_ops switch_ops = {
@@ -700,6 +726,10 @@ static int rpm_reg_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
+	/* Regulators with ia property suppports drms */
+	if (vreg->parts->ia.mask)
+		initdata->constraints.valid_ops_mask |= REGULATOR_CHANGE_DRMS;
+
 	key = "bias-pull-down";
 	if (of_property_read_bool(pdev->dev.of_node, key)) {
 		ret = rpm_reg_set(vreg, &vreg->parts->pd, 1);
-- 
1.8.2.2

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