[PATCH v6 3/6] regulator: axp20x: prepare support for multiple AXP chip families

Chen-Yu Tsai wens at csie.org
Thu Apr 9 10:23:41 PDT 2015


Hi Mark,

On Tue, Mar 31, 2015 at 11:03 PM, Chen-Yu Tsai <wens at csie.org> wrote:
> From: Boris BREZILLON <boris.brezillon at free-electrons.com>
>
> Rework the AXP20X_ macros and probe function to support the several chip
> families, so that each family can define it's own set of regulators.
>
> Signed-off-by: Boris BREZILLON <boris.brezillon at free-electrons.com>
> [wens at csie.org: Support different DC-DC work frequency ranges]
> Signed-off-by: Chen-Yu Tsai <wens at csie.org>
> Reviewed-by: Mark Brown <broonie at kernel.org>

Are you OK with Lee taking the 2 regulator patches through his tree?
I realize I'm asking this way too late for this merge window.

Regards,
ChenYu

> ---
>  drivers/regulator/axp20x-regulator.c | 143 +++++++++++++++++++++++------------
>  1 file changed, 94 insertions(+), 49 deletions(-)
>
> diff --git a/drivers/regulator/axp20x-regulator.c b/drivers/regulator/axp20x-regulator.c
> index e4331f5e5d7d..50ae0b5f2c0c 100644
> --- a/drivers/regulator/axp20x-regulator.c
> +++ b/drivers/regulator/axp20x-regulator.c
> @@ -32,15 +32,15 @@
>
>  #define AXP20X_FREQ_DCDC_MASK          0x0f
>
> -#define AXP20X_DESC_IO(_id, _match, _supply, _min, _max, _step, _vreg, _vmask, \
> -                      _ereg, _emask, _enable_val, _disable_val)                \
> -       [AXP20X_##_id] = {                                                      \
> +#define AXP_DESC_IO(_family, _id, _match, _supply, _min, _max, _step, _vreg,   \
> +                   _vmask, _ereg, _emask, _enable_val, _disable_val)           \
> +       [_family##_##_id] = {                                                   \
>                 .name           = #_id,                                         \
>                 .supply_name    = (_supply),                                    \
>                 .of_match       = of_match_ptr(_match),                         \
>                 .regulators_node = of_match_ptr("regulators"),                  \
>                 .type           = REGULATOR_VOLTAGE,                            \
> -               .id             = AXP20X_##_id,                                 \
> +               .id             = _family##_##_id,                              \
>                 .n_voltages     = (((_max) - (_min)) / (_step) + 1),            \
>                 .owner          = THIS_MODULE,                                  \
>                 .min_uV         = (_min) * 1000,                                \
> @@ -54,15 +54,15 @@
>                 .ops            = &axp20x_ops,                                  \
>         }
>
> -#define AXP20X_DESC(_id, _match, _supply, _min, _max, _step, _vreg, _vmask,    \
> -                   _ereg, _emask)                                              \
> -       [AXP20X_##_id] = {                                                      \
> +#define AXP_DESC(_family, _id, _match, _supply, _min, _max, _step, _vreg,      \
> +                _vmask, _ereg, _emask)                                         \
> +       [_family##_##_id] = {                                                   \
>                 .name           = #_id,                                         \
>                 .supply_name    = (_supply),                                    \
>                 .of_match       = of_match_ptr(_match),                         \
>                 .regulators_node = of_match_ptr("regulators"),                  \
>                 .type           = REGULATOR_VOLTAGE,                            \
> -               .id             = AXP20X_##_id,                                 \
> +               .id             = _family##_##_id,                              \
>                 .n_voltages     = (((_max) - (_min)) / (_step) + 1),            \
>                 .owner          = THIS_MODULE,                                  \
>                 .min_uV         = (_min) * 1000,                                \
> @@ -74,29 +74,29 @@
>                 .ops            = &axp20x_ops,                                  \
>         }
>
> -#define AXP20X_DESC_FIXED(_id, _match, _supply, _volt)                         \
> -       [AXP20X_##_id] = {                                                      \
> +#define AXP_DESC_FIXED(_family, _id, _match, _supply, _volt)                   \
> +       [_family##_##_id] = {                                                   \
>                 .name           = #_id,                                         \
>                 .supply_name    = (_supply),                                    \
>                 .of_match       = of_match_ptr(_match),                         \
>                 .regulators_node = of_match_ptr("regulators"),                  \
>                 .type           = REGULATOR_VOLTAGE,                            \
> -               .id             = AXP20X_##_id,                                 \
> +               .id             = _family##_##_id,                              \
>                 .n_voltages     = 1,                                            \
>                 .owner          = THIS_MODULE,                                  \
>                 .min_uV         = (_volt) * 1000,                               \
>                 .ops            = &axp20x_ops_fixed                             \
>         }
>
> -#define AXP20X_DESC_TABLE(_id, _match, _supply, _table, _vreg, _vmask, _ereg,  \
> -                         _emask)                                               \
> -       [AXP20X_##_id] = {                                                      \
> +#define AXP_DESC_TABLE(_family, _id, _match, _supply, _table, _vreg, _vmask,   \
> +                      _ereg, _emask)                                           \
> +       [_family##_##_id] = {                                                   \
>                 .name           = #_id,                                         \
>                 .supply_name    = (_supply),                                    \
>                 .of_match       = of_match_ptr(_match),                         \
>                 .regulators_node = of_match_ptr("regulators"),                  \
>                 .type           = REGULATOR_VOLTAGE,                            \
> -               .id             = AXP20X_##_id,                                 \
> +               .id             = _family##_##_id,                              \
>                 .n_voltages     = ARRAY_SIZE(_table),                           \
>                 .owner          = THIS_MODULE,                                  \
>                 .vsel_reg       = (_vreg),                                      \
> @@ -136,37 +136,57 @@ static struct regulator_ops axp20x_ops = {
>  };
>
>  static const struct regulator_desc axp20x_regulators[] = {
> -       AXP20X_DESC(DCDC2, "dcdc2", "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT,
> -                   0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
> -       AXP20X_DESC(DCDC3, "dcdc3", "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT,
> -                   0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
> -       AXP20X_DESC_FIXED(LDO1, "ldo1", "acin", 1300),
> -       AXP20X_DESC(LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
> -                   AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
> -       AXP20X_DESC(LDO3, "ldo3", "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT,
> -                   0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
> -       AXP20X_DESC_TABLE(LDO4, "ldo4", "ldo24in", axp20x_ldo4_data,
> -                         AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08),
> -       AXP20X_DESC_IO(LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
> -                      AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
> -                      AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
> +       AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25,
> +                AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
> +       AXP_DESC(AXP20X, DCDC3, "dcdc3", "vin3", 700, 3500, 25,
> +                AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
> +       AXP_DESC_FIXED(AXP20X, LDO1, "ldo1", "acin", 1300),
> +       AXP_DESC(AXP20X, LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
> +                AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
> +       AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25,
> +                AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
> +       AXP_DESC_TABLE(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_data,
> +                      AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08),
> +       AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
> +                   AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
> +                   AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
>  };
>
>  static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
>  {
>         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
> +       u32 min, max, def, step;
> +
> +       switch (axp20x->variant) {
> +       case AXP202_ID:
> +       case AXP209_ID:
> +               min = 750;
> +               max = 1875;
> +               def = 1500;
> +               step = 75;
> +               break;
> +       default:
> +               dev_err(&pdev->dev,
> +                       "Setting DCDC frequency for unsupported AXP variant\n");
> +               return -EINVAL;
> +       }
> +
> +       if (dcdcfreq == 0)
> +               dcdcfreq = def;
>
> -       if (dcdcfreq < 750) {
> -               dcdcfreq = 750;
> -               dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n");
> +       if (dcdcfreq < min) {
> +               dcdcfreq = min;
> +               dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n",
> +                        min);
>         }
>
> -       if (dcdcfreq > 1875) {
> -               dcdcfreq = 1875;
> -               dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n");
> +       if (dcdcfreq > max) {
> +               dcdcfreq = max;
> +               dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n",
> +                        max);
>         }
>
> -       dcdcfreq = (dcdcfreq - 750) / 75;
> +       dcdcfreq = (dcdcfreq - min) / step;
>
>         return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ,
>                                   AXP20X_FREQ_DCDC_MASK, dcdcfreq);
> @@ -176,7 +196,7 @@ static int axp20x_regulator_parse_dt(struct platform_device *pdev)
>  {
>         struct device_node *np, *regulators;
>         int ret;
> -       u32 dcdcfreq;
> +       u32 dcdcfreq = 0;
>
>         np = of_node_get(pdev->dev.parent->of_node);
>         if (!np)
> @@ -186,7 +206,6 @@ static int axp20x_regulator_parse_dt(struct platform_device *pdev)
>         if (!regulators) {
>                 dev_warn(&pdev->dev, "regulators node not found\n");
>         } else {
> -               dcdcfreq = 1500;
>                 of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq);
>                 ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
>                 if (ret < 0) {
> @@ -202,15 +221,27 @@ static int axp20x_regulator_parse_dt(struct platform_device *pdev)
>
>  static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
>  {
> -       unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK;
> +       struct axp20x_dev *axp20x = rdev_get_drvdata(rdev);
> +       unsigned int mask;
>
> -       if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
> -               return -EINVAL;
> +       switch (axp20x->variant) {
> +       case AXP202_ID:
> +       case AXP209_ID:
> +               if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
> +                       return -EINVAL;
> +
> +               mask = AXP20X_WORKMODE_DCDC2_MASK;
> +               if (id == AXP20X_DCDC3)
> +                       mask = AXP20X_WORKMODE_DCDC3_MASK;
>
> -       if (id == AXP20X_DCDC3)
> -               mask = AXP20X_WORKMODE_DCDC3_MASK;
> +               workmode <<= ffs(mask) - 1;
> +               break;
>
> -       workmode <<= ffs(mask) - 1;
> +       default:
> +               /* should not happen */
> +               WARN_ON(1);
> +               return -EINVAL;
> +       }
>
>         return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
>  }
> @@ -219,22 +250,36 @@ static int axp20x_regulator_probe(struct platform_device *pdev)
>  {
>         struct regulator_dev *rdev;
>         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
> +       const struct regulator_desc *regulators;
>         struct regulator_config config = {
>                 .dev = pdev->dev.parent,
>                 .regmap = axp20x->regmap,
> +               .driver_data = axp20x,
>         };
> -       int ret, i;
> +       int ret, i, nregulators;
>         u32 workmode;
>
> +       switch (axp20x->variant) {
> +       case AXP202_ID:
> +       case AXP209_ID:
> +               regulators = axp20x_regulators;
> +               nregulators = AXP20X_REG_ID_MAX;
> +               break;
> +       default:
> +               dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n",
> +                       axp20x->variant);
> +               return -EINVAL;
> +       }
> +
>         /* This only sets the dcdc freq. Ignore any errors */
>         axp20x_regulator_parse_dt(pdev);
>
> -       for (i = 0; i < AXP20X_REG_ID_MAX; i++) {
> -               rdev = devm_regulator_register(&pdev->dev, &axp20x_regulators[i],
> +       for (i = 0; i < nregulators; i++) {
> +               rdev = devm_regulator_register(&pdev->dev, &regulators[i],
>                                                &config);
>                 if (IS_ERR(rdev)) {
>                         dev_err(&pdev->dev, "Failed to register %s\n",
> -                               axp20x_regulators[i].name);
> +                               regulators[i].name);
>
>                         return PTR_ERR(rdev);
>                 }
> @@ -245,7 +290,7 @@ static int axp20x_regulator_probe(struct platform_device *pdev)
>                 if (!ret) {
>                         if (axp20x_set_dcdc_workmode(rdev, i, workmode))
>                                 dev_err(&pdev->dev, "Failed to set workmode on %s\n",
> -                                       axp20x_regulators[i].name);
> +                                       rdev->desc->name);
>                 }
>         }
>
> --
> 2.1.4
>



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