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Date: Mon, 25 Mar 2019 14:58:22 +0100
From: Bartosz Golaszewski <bgolaszewski@...libre.com>
To: Axel Lin <axel.lin@...ics.com>
Cc: Mark Brown <broonie@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] regulator: max77650: Convert MAX77651 SBB1 to pickable
linear range
pon., 25 mar 2019 o 14:56 Axel Lin <axel.lin@...ics.com> napisał(a):
>
> The pickable linear range is suitable for The MAX77651 SBB1.
> According to MAX77651 TV_SBB1 Code Table:
> Use BIT[1:0] as range selectors.
> Use BIT[5:2] as selectors for each linear range.
>
> The MAX77651 SBB1 supports up to selector 57, selector 58 ~ 63 are RSVD,
> thus set n_voltage to 58.
>
> Signed-off-by: Axel Lin <axel.lin@...ics.com>
> ---
> Hi Bartosz,
> I don't have this h/w, please help to review and test this patch.
> Thanks,
> Axel
>
> drivers/regulator/max77650-regulator.c | 134 +++++++++----------------
> 1 file changed, 45 insertions(+), 89 deletions(-)
>
> diff --git a/drivers/regulator/max77650-regulator.c b/drivers/regulator/max77650-regulator.c
> index 5c4f86c98510..24b4a0a3c3bb 100644
> --- a/drivers/regulator/max77650-regulator.c
> +++ b/drivers/regulator/max77650-regulator.c
> @@ -20,6 +20,8 @@
>
> #define MAX77650_REGULATOR_V_LDO_MASK GENMASK(6, 0)
> #define MAX77650_REGULATOR_V_SBB_MASK GENMASK(5, 0)
> +#define MAX77651_REGULATOR_V_SBB1_MASK GENMASK(5, 2)
> +#define MAX77651_REGULATOR_V_SBB1_RANGE_MASK GENMASK(1, 0)
>
> #define MAX77650_REGULATOR_AD_MASK BIT(3)
> #define MAX77650_REGULATOR_AD_DISABLED 0x00
> @@ -27,6 +29,8 @@
>
> #define MAX77650_REGULATOR_CURR_LIM_MASK GENMASK(7, 6)
>
> +static struct max77650_regulator_desc max77651_SBB1_desc;
> +
> enum {
> MAX77650_REGULATOR_ID_LDO = 0,
> MAX77650_REGULATOR_ID_SBB0,
> @@ -41,43 +45,20 @@ struct max77650_regulator_desc {
> unsigned int regB;
> };
>
> -static const unsigned int max77651_sbb1_regulator_volt_table[] = {
> - 2400000, 3200000, 4000000, 4800000,
> - 2450000, 3250000, 4050000, 4850000,
> - 2500000, 3300000, 4100000, 4900000,
> - 2550000, 3350000, 4150000, 4950000,
> - 2600000, 3400000, 4200000, 5000000,
> - 2650000, 3450000, 4250000, 5050000,
> - 2700000, 3500000, 4300000, 5100000,
> - 2750000, 3550000, 4350000, 5150000,
> - 2800000, 3600000, 4400000, 5200000,
> - 2850000, 3650000, 4450000, 5250000,
> - 2900000, 3700000, 4500000, 0,
> - 2950000, 3750000, 4550000, 0,
> - 3000000, 3800000, 4600000, 0,
> - 3050000, 3850000, 4650000, 0,
> - 3100000, 3900000, 4700000, 0,
> - 3150000, 3950000, 4750000, 0,
> +static const unsigned int max77651_sbb1_volt_range_sel[] = {
> + 0x0, 0x1, 0x2, 0x3
> };
>
> -#define MAX77651_REGULATOR_SBB1_SEL_DEC(_val) \
> - (((_val & 0x3c) >> 2) | ((_val & 0x03) << 4))
> -#define MAX77651_REGULATOR_SBB1_SEL_ENC(_val) \
> - (((_val & 0x30) >> 4) | ((_val & 0x0f) << 2))
> -
> -#define MAX77650_REGULATOR_SBB1_SEL_DECR(_val) \
> - do { \
> - _val = MAX77651_REGULATOR_SBB1_SEL_DEC(_val); \
> - _val--; \
> - _val = MAX77651_REGULATOR_SBB1_SEL_ENC(_val); \
> - } while (0)
> -
> -#define MAX77650_REGULATOR_SBB1_SEL_INCR(_val) \
> - do { \
> - _val = MAX77651_REGULATOR_SBB1_SEL_DEC(_val); \
> - _val++; \
> - _val = MAX77651_REGULATOR_SBB1_SEL_ENC(_val); \
> - } while (0)
> +static const struct regulator_linear_range max77651_sbb1_volt_ranges[] = {
> + /* range index 0 */
> + REGULATOR_LINEAR_RANGE(2400000, 0x00, 0x0f, 50000),
> + /* range index 1 */
> + REGULATOR_LINEAR_RANGE(3200000, 0x00, 0x0f, 50000),
> + /* range index 2 */
> + REGULATOR_LINEAR_RANGE(4000000, 0x00, 0x0f, 50000),
> + /* range index 3 */
> + REGULATOR_LINEAR_RANGE(4800000, 0x00, 0x09, 50000),
> +};
>
> static const unsigned int max77650_current_limit_table[] = {
> 1000000, 866000, 707000, 500000,
> @@ -130,6 +111,7 @@ static int max77650_regulator_disable(struct regulator_dev *rdev)
> static int max77650_regulator_set_voltage_sel(struct regulator_dev *rdev,
> unsigned int sel)
> {
> + struct max77650_regulator_desc *rdesc = rdev_get_drvdata(rdev);
> int rv = 0, curr, diff;
> bool ascending;
>
> @@ -137,15 +119,24 @@ static int max77650_regulator_set_voltage_sel(struct regulator_dev *rdev,
> * If the regulator is disabled, we can program the desired
> * voltage right away.
> */
> - if (!max77650_regulator_is_enabled(rdev))
> - return regulator_set_voltage_sel_regmap(rdev, sel);
> + if (!max77650_regulator_is_enabled(rdev)) {
> + if (rdesc == &max77651_SBB1_desc)
> + return regulator_set_voltage_sel_pickable_regmap(rdev,
> + sel);
> + else
> + return regulator_set_voltage_sel_regmap(rdev, sel);
> + }
>
> /*
> * Otherwise we need to manually ramp the output voltage up/down
> * one step at a time.
> */
>
> - curr = regulator_get_voltage_sel_regmap(rdev);
> + if (rdesc == &max77651_SBB1_desc)
> + curr = regulator_get_voltage_sel_pickable_regmap(rdev);
> + else
> + curr = regulator_get_voltage_sel_regmap(rdev);
> +
> if (curr < 0)
> return curr;
>
> @@ -162,57 +153,18 @@ static int max77650_regulator_set_voltage_sel(struct regulator_dev *rdev,
> * the selector equals 0.
> */
> for (ascending ? curr++ : curr--;; ascending ? curr++ : curr--) {
> - rv = regulator_set_voltage_sel_regmap(rdev, curr);
> - if (rv)
> - return rv;
> -
> - if (curr == sel)
> - break;
> - }
> -
> - return 0;
> -}
> -
> -/*
> - * Special case: non-linear voltage table for max77651 SBB1 - software
> - * must ensure the voltage is ramped in 50mV increments.
> - */
> -static int max77651_regulator_sbb1_set_voltage_sel(struct regulator_dev *rdev,
> - unsigned int sel)
> -{
> - int rv = 0, curr, vcurr, vdest, vdiff;
> -
> - /*
> - * If the regulator is disabled, we can program the desired
> - * voltage right away.
> - */
> - if (!max77650_regulator_is_enabled(rdev))
> - return regulator_set_voltage_sel_regmap(rdev, sel);
> -
> - curr = regulator_get_voltage_sel_regmap(rdev);
> - if (curr < 0)
> - return curr;
> -
> - if (curr == sel)
> - return 0; /* Already there. */
> -
> - vcurr = max77651_sbb1_regulator_volt_table[curr];
> - vdest = max77651_sbb1_regulator_volt_table[sel];
> - vdiff = vcurr - vdest;
> -
> - for (;;) {
> - if (vdiff > 0)
> - MAX77650_REGULATOR_SBB1_SEL_DECR(curr);
> + if (rdesc == &max77651_SBB1_desc)
> + rv = regulator_set_voltage_sel_pickable_regmap(rdev,
> + curr);
> else
> - MAX77650_REGULATOR_SBB1_SEL_INCR(curr);
> + rv = regulator_set_voltage_sel_regmap(rdev, curr);
>
> - rv = regulator_set_voltage_sel_regmap(rdev, curr);
> if (rv)
> return rv;
>
> if (curr == sel)
> break;
> - };
> + }
>
> return 0;
> }
> @@ -241,14 +193,14 @@ static const struct regulator_ops max77650_regulator_SBB_ops = {
> .set_active_discharge = regulator_set_active_discharge_regmap,
> };
>
> -/* Special case for max77651 SBB1 - non-linear voltage mapping. */
> +/* Special case for max77651 SBB1 - pickable linear-range voltage mapping. */
> static const struct regulator_ops max77651_SBB1_regulator_ops = {
> .is_enabled = max77650_regulator_is_enabled,
> .enable = max77650_regulator_enable,
> .disable = max77650_regulator_disable,
> - .list_voltage = regulator_list_voltage_table,
> - .get_voltage_sel = regulator_get_voltage_sel_regmap,
> - .set_voltage_sel = max77651_regulator_sbb1_set_voltage_sel,
> + .list_voltage = regulator_list_voltage_pickable_linear_range,
> + .get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
> + .set_voltage_sel = max77650_regulator_set_voltage_sel,
> .get_current_limit = regulator_get_current_limit_regmap,
> .set_current_limit = regulator_set_current_limit_regmap,
> .set_active_discharge = regulator_set_active_discharge_regmap,
> @@ -345,9 +297,13 @@ static struct max77650_regulator_desc max77651_SBB1_desc = {
> .supply_name = "in-sbb1",
> .id = MAX77650_REGULATOR_ID_SBB1,
> .ops = &max77651_SBB1_regulator_ops,
> - .volt_table = max77651_sbb1_regulator_volt_table,
> - .n_voltages = ARRAY_SIZE(max77651_sbb1_regulator_volt_table),
> - .vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
> + .linear_range_selectors = max77651_sbb1_volt_range_sel,
> + .linear_ranges = max77651_sbb1_volt_ranges,
> + .n_linear_ranges = ARRAY_SIZE(max77651_sbb1_volt_ranges),
> + .n_voltages = 58,
> + .vsel_range_mask = MAX77651_REGULATOR_V_SBB1_RANGE_MASK,
> + .vsel_range_reg = MAX77650_REG_CNFG_SBB1_A,
> + .vsel_mask = MAX77651_REGULATOR_V_SBB1_MASK,
> .vsel_reg = MAX77650_REG_CNFG_SBB1_A,
> .active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
> .active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
> --
> 2.17.1
>
Oh nice! I didn't know about this feature. I'll test it tomorrow.
Bart
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