[PATCH-v2 2/2] regulator: 88pm800: Add support for configuration of dual phase on BUCK1

Vaibhav Hiremath
2015-07-21T16:25:53Z

88PM860 device supports dual phase mode on BUCK1 output.
In normal usecase, BUCK1A and BUCK1B operates independently with 3A
capacity. And they both can work as a dual phase providing 6A capacity.

This patch updates the regulator driver to read the respective
DT property and enable dual-phase mode on BUCK1.

Note that, this is init time (one time) initialization.

Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
---
drivers/regulator/88pm800.c | 31 +++++++++++++++++++++++++++++++
include/linux/mfd/88pm80x.h | 3 +++
2 files changed, 34 insertions(+)

diff --git a/drivers/regulator/88pm800.c b/drivers/regulator/88pm800.c
index e846e4c..1bf2b35 100644
--- a/drivers/regulator/88pm800.c
+++ b/drivers/regulator/88pm800.c
@@ -267,6 +267,31 @@ static struct pm800_regulator_info pm860_regulator_info[] = {
PM800_LDO(ldo20, LDO20, LDO_ENA1_3, 3, 10000, ldo_volt_table2),
};

+static int pm800_regulator_init(struct platform_device *pdev)
+{
+ struct pm800_regulators *pm800_data = platform_get_drvdata(pdev);
+ struct pm80x_chip *chip = pm800_data->chip;
+ int ret;
+
+ /* Currently only supported on 88pm860 device */
+ if (chip->type != CHIP_PM860)
+ return 0;
+
+ if (of_property_read_bool(pdev->dev.of_node,
+ "marvell,88pm860-buck1-dualphase-en")) {
+ ret = regmap_update_bits(chip->subchip->regmap_power,
+ PM860_BUCK1_MISC,
+ BUCK1_DUAL_PHASE_SEL,
+ BUCK1_DUAL_PHASE_SEL);
+ if (ret) {
+ dev_err(chip->dev, "failed to set dual-pase mode %d\n", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
static int pm800_regulator_probe(struct platform_device *pdev)
{
struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
@@ -336,6 +361,12 @@ static int pm800_regulator_probe(struct platform_device *pdev)
}
}

+ ret = pm800_regulator_init(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to init 88pm800 regulator device\n");
+ return ret;
+ }
+
return 0;
}

diff --git a/include/linux/mfd/88pm80x.h b/include/linux/mfd/88pm80x.h
index a92d173..05d9bad 100644
--- a/include/linux/mfd/88pm80x.h
+++ b/include/linux/mfd/88pm80x.h
@@ -295,6 +295,9 @@ enum {
#define PM860_BUCK4_MISC2 (0x82)
#define PM860_BUCK4_FULL_DRV BIT(2)

+#define PM860_BUCK1_MISC (0x8E)
+#define BUCK1_DUAL_PHASE_SEL BIT(2)
+
struct pm80x_rtc_pdata {
int vrtc;
int rtc_wakeup;
--
1.9.1