On Tuesday 25 August 2015 10:18 AM, Krzysztof Kozlowski wrote:
On 24.08.2015 21:40, Vaibhav Hiremath wrote: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 if dual phase mode is enabled, then BUCK1B will not be registered to the regulator framework and the current capacity of BUCK1(A) would be set to 6A [3A of BUCK1A + 3A of BUCK1B]. Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@xxxxxxxxxx> --- drivers/regulator/88pm800.c | 40 ++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/88pm80x.h | 3 +++ 2 files changed, 43 insertions(+) diff --git a/drivers/regulator/88pm800.c b/drivers/regulator/88pm800.c index 365a154..7aca6d17 100644 --- a/drivers/regulator/88pm800.c +++ b/drivers/regulator/88pm800.c @@ -267,6 +267,37 @@ 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_regulator_info *info) +{ + struct pm800_regulators *pm800_data = platform_get_drvdata(pdev); + struct pm80x_chip *chip = pm800_data->chip; + int ret = 0; + + /* 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")) { + /* Update the constraint to [3A (BUCK1A) + 3A (BUCK1B)] */ + info[PM800_ID_BUCK1].max_ua = 6000000; + /* Remove BUCK1B from the list, as we are in dual phase mode */ + memset(&info[PM800_ID_BUCK1B], 0, sizeof(*info)); + /* Enable dual phase mode */ + 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 ret; +} + static int pm800_regulator_probe(struct platform_device *pdev) { struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent); @@ -311,11 +342,20 @@ static int pm800_regulator_probe(struct platform_device *pdev) return -ENODEV; } + ret = pm800_regulator_init(pdev, info); + if (ret) { + dev_err(&pdev->dev, "failed to init 88pm800 regulator device\n"); + return ret; + } + config.dev = chip->dev; config.regmap = pm800_data->map; for (i = 0; i < PM800_ID_RG_MAX; i++) { struct regulator_dev *regulator; + if (!info[i].desc.name) + continue;How the driver was working without this on 88PM800? There is a gap in pm800_regulator_info - three regulators are not set.
I have 88PM860 based board, where the whole array will be filled up. So it was missed I guess :) But when I introduced logic for skipping BUCK1B, I hit this. And here is the fix.
The patch itself looks good Reviewed-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Thanks for your review. Thanks, Vaibhav -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
