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.hirem...@linaro.org>
> ---
> 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.
The patch itself looks good
Reviewed-by: Krzysztof Kozlowski <k.kozlow...@samsung.com>
Best regards,
Krzysztof
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