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 adds support to enable dual phase mode, using DT property
"marvell,88pm860-buck1-dualphase-en"
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@xxxxxxxxxx>
---
drivers/mfd/88pm800.c | 11 +++++++++++
include/linux/mfd/88pm80x.h | 3 +++
2 files changed, 14 insertions(+)
diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index 8930fd8..a2ef0c7 100644
--- a/drivers/mfd/88pm800.c
+++ b/drivers/mfd/88pm800.c
@@ -556,6 +556,17 @@ static int pm800_init_config(struct pm80x_chip *chip, struct device_node *np)
if (ret)
goto error;
+ /* enable buck1 dual phase mode*/
+ if (of_property_read_bool(np,
+ "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)
+ goto error;
+ }
+
/*
* Set buck2 and buck4 driver selection to be full.
* The default value is 0, for full drive support
diff --git a/include/linux/mfd/88pm80x.h b/include/linux/mfd/88pm80x.h
index fb916f1..b40d15f 100644
--- a/include/linux/mfd/88pm80x.h
+++ b/include/linux/mfd/88pm80x.h
@@ -293,6 +293,9 @@ 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
--
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