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 <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
