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 <[email protected]> --- 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 -- 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/
