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authorXin Xie <xxie@nvidia.com>2011-08-09 18:47:50 +0800
committerLiam Girdwood <lrg@slimlogic.co.uk>2011-08-28 17:41:28 +0100
commit500c524aad173864a58e128d0be9713fa5846471 (patch)
tree7ff51b0c7489b0f13422f27784678008e831ac26
parentfc999b83799074832367d3cfd724c341c849a7da (diff)
regulator: tps6586x: add SMx slew rate setting
Add output vlotage slew rate setting for SM0/SM1 Signed-off-by: Xin Xie <xxie@nvidia.com> Signed-off-by: Danny Huang <dahuang@nvidia.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
-rw-r--r--drivers/regulator/tps6586x-regulator.c32
-rw-r--r--include/linux/mfd/tps6586x.h16
2 files changed, 47 insertions, 1 deletions
diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c
index bb04a75a4c98..dbcf09d5080c 100644
--- a/drivers/regulator/tps6586x-regulator.c
+++ b/drivers/regulator/tps6586x-regulator.c
@@ -332,6 +332,36 @@ static inline int tps6586x_regulator_preinit(struct device *parent,
1 << ri->enable_bit[1]);
}
+static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
+{
+ struct device *parent = pdev->dev.parent;
+ struct regulator_init_data *p = pdev->dev.platform_data;
+ struct tps6586x_settings *setting = p->driver_data;
+ uint8_t reg;
+
+ if (setting == NULL)
+ return 0;
+
+ if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
+ return 0;
+
+ /* only SM0 and SM1 can have the slew rate settings */
+ switch (pdev->id) {
+ case TPS6586X_ID_SM_0:
+ reg = TPS6586X_SM0SL;
+ break;
+ case TPS6586X_ID_SM_1:
+ reg = TPS6586X_SM1SL;
+ break;
+ default:
+ dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
+ return -EINVAL;
+ }
+
+ return tps6586x_write(parent, reg,
+ setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
+}
+
static inline struct tps6586x_regulator *find_regulator_info(int id)
{
struct tps6586x_regulator *ri;
@@ -374,7 +404,7 @@ static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, rdev);
- return 0;
+ return tps6586x_regulator_set_slew_rate(pdev);
}
static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
diff --git a/include/linux/mfd/tps6586x.h b/include/linux/mfd/tps6586x.h
index b6bab1b04e25..b19176eab44d 100644
--- a/include/linux/mfd/tps6586x.h
+++ b/include/linux/mfd/tps6586x.h
@@ -1,6 +1,18 @@
#ifndef __LINUX_MFD_TPS6586X_H
#define __LINUX_MFD_TPS6586X_H
+#define TPS6586X_SLEW_RATE_INSTANTLY 0x00
+#define TPS6586X_SLEW_RATE_110UV 0x01
+#define TPS6586X_SLEW_RATE_220UV 0x02
+#define TPS6586X_SLEW_RATE_440UV 0x03
+#define TPS6586X_SLEW_RATE_880UV 0x04
+#define TPS6586X_SLEW_RATE_1760UV 0x05
+#define TPS6586X_SLEW_RATE_3520UV 0x06
+#define TPS6586X_SLEW_RATE_7040UV 0x07
+
+#define TPS6586X_SLEW_RATE_SET 0x08
+#define TPS6586X_SLEW_RATE_MASK 0x07
+
enum {
TPS6586X_ID_SM_0,
TPS6586X_ID_SM_1,
@@ -48,6 +60,10 @@ enum {
TPS6586X_INT_RTC_ALM2,
};
+struct tps6586x_settings {
+ int slew_rate;
+};
+
struct tps6586x_subdev_info {
int id;
const char *name;