linux-kernel - [PATCH 2/9] regulator: max77802: Add .{get,set}

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Date:	Wed, 15 Oct 2014 18:20:32 +0200
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Mark Brown <broonie@...nel.org>
Cc:	Doug Anderson <dianders@...omium.org>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Olof Johansson <olof@...om.net>,
	Chris Zhong <zyw@...k-chips.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Abhilash Kesavan <kesavan.abhilash@...il.com>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Subject: [PATCH 2/9] regulator: max77802: Add .{get,set}_mode callbacks

Some max77802 LDOs (1, 3, 20 and 21) support to be configured in Low
Power Mode during system normal operation. Add function handlers for
the .get_mode and .set_mode operations to set the mode on these LDOs.

Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
---
 drivers/regulator/max77802.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/drivers/regulator/max77802.c b/drivers/regulator/max77802.c
index 26f6963..baf834d 100644
--- a/drivers/regulator/max77802.c
+++ b/drivers/regulator/max77802.c
@@ -51,6 +51,9 @@
 
 #define MAX77802_OFF_PWRREQ		0x1
 
+#define MAX77802_MODE(pval) ((pval == MAX77802_OPMODE_NORMAL) ?	\
+			     REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY)
+
 /* MAX77802 has two register formats: 2-bit and 4-bit */
 static const unsigned int ramp_table_77802_2bit[] = {
 	12500,
@@ -105,6 +108,45 @@ static int max77802_set_suspend_disable(struct regulator_dev *rdev)
 }
 
 /*
+ * Some LDOs support Low Power Mode while the system is running.
+ *
+ * LDOs 1, 3, 20, 21.
+ */
+static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+	int id = rdev_get_id(rdev);
+	unsigned int val;
+	int shift = max77802_get_opmode_shift(id);
+
+	switch (mode) {
+	case REGULATOR_MODE_IDLE:
+	case REGULATOR_MODE_STANDBY:
+		val = MAX77802_OPMODE_LP;	/* ON in Low Power Mode */
+		break;
+	case REGULATOR_MODE_NORMAL:
+		val = MAX77802_OPMODE_NORMAL;	/* ON in Normal Mode */
+		break;
+	default:
+		dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
+			 rdev->desc->name, mode);
+		return -EINVAL;
+	}
+
+	max77802->opmode[id] = val;
+	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+				  rdev->desc->enable_mask, val << shift);
+}
+
+static unsigned max77802_get_mode(struct regulator_dev *rdev)
+{
+	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+	int id = rdev_get_id(rdev);
+
+	return MAX77802_MODE(max77802->opmode[id]);
+}
+
+/*
  * Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state
  * (Enable Control Logic1 by PWRREQ)
  *
@@ -268,6 +310,8 @@ static struct regulator_ops max77802_ldo_ops_logic2 = {
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
+	.set_mode		= max77802_set_mode,
+	.get_mode		= max77802_get_mode,
 	.set_suspend_mode	= max77802_ldo_set_suspend_mode_logic2,
 };
 
-- 
2.1.0

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