linux-kernel - [PATCH] regulator: rk808: Add support setting suspend voltage

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Date:	Tue,  7 Oct 2014 16:43:57 +0800
From:	Chris Zhong <zyw@...k-chips.com>
To:	dianders@...omium.org, heiko@...ech.de
Cc:	linux-rockchip@...ts.infradead.org,
	Chris Zhong <zyw@...k-chips.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH] regulator: rk808: Add support setting suspend voltage

support setting suspend voltage and disable regulator in suspend.

Signed-off-by: Chris Zhong <zyw@...k-chips.com>

---

 drivers/regulator/rk808-regulator.c |   37 +++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/drivers/regulator/rk808-regulator.c b/drivers/regulator/rk808-regulator.c
index e305416..6687e6e 100644
--- a/drivers/regulator/rk808-regulator.c
+++ b/drivers/regulator/rk808-regulator.c
@@ -36,6 +36,12 @@
 #define RK808_RAMP_RATE_6MV_PER_US	(2 << RK808_RAMP_RATE_OFFSET)
 #define RK808_RAMP_RATE_10MV_PER_US	(3 << RK808_RAMP_RATE_OFFSET)
 
+/* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */
+#define RK808_SLP_REG_OFFSET 1
+
+/* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */
+#define RK808_SLP_SET_OFF_REG_OFFSET 2
+
 static const int rk808_buck_config_regs[] = {
 	RK808_BUCK1_CONFIG_REG,
 	RK808_BUCK2_CONFIG_REG,
@@ -91,6 +97,32 @@ static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 				  RK808_RAMP_RATE_MASK, ramp_value);
 }
 
+int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
+{
+	unsigned int reg;
+	int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
+
+	if (sel < 0)
+		return -EINVAL;
+
+	reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
+
+	return regmap_update_bits(rdev->regmap, reg,
+				  rdev->desc->vsel_mask,
+				  sel);
+}
+
+int rk808_set_suspend_disable(struct regulator_dev *rdev)
+{
+	unsigned int reg;
+
+	reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
+
+	return regmap_update_bits(rdev->regmap, reg,
+				  rdev->desc->enable_mask,
+				  rdev->desc->enable_mask);
+}
+
 static struct regulator_ops rk808_buck1_2_ops = {
 	.list_voltage		= regulator_list_voltage_linear_range,
 	.map_voltage		= regulator_map_voltage_linear_range,
@@ -100,6 +132,8 @@ static struct regulator_ops rk808_buck1_2_ops = {
 	.disable		= regulator_disable_regmap,
 	.is_enabled		= regulator_is_enabled_regmap,
 	.set_ramp_delay		= rk808_set_ramp_delay,
+	.set_suspend_voltage    = rk808_set_suspend_voltage,
+	.set_suspend_disable    = rk808_set_suspend_disable,
 };
 
 static struct regulator_ops rk808_reg_ops = {
@@ -110,12 +144,15 @@ static struct regulator_ops rk808_reg_ops = {
 	.enable			= regulator_enable_regmap,
 	.disable		= regulator_disable_regmap,
 	.is_enabled		= regulator_is_enabled_regmap,
+	.set_suspend_voltage    = rk808_set_suspend_voltage,
+	.set_suspend_disable    = rk808_set_suspend_disable,
 };
 
 static struct regulator_ops rk808_switch_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
+	.set_suspend_disable    = rk808_set_suspend_disable,
 };
 
 static const struct regulator_desc rk808_reg[] = {
-- 
1.7.9.5

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