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

From: Chen-Yu Tsai
Date: Thu Apr 09 2015 - 13:24:15 EST

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Hi Mark,

On Tue, Mar 31, 2015 at 11:03 PM, Chen-Yu Tsai <wens@xxxxxxxx> wrote:
> From: Boris BREZILLON <boris.brezillon@xxxxxxxxxxxxxxxxxx>
>
> 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@xxxxxxxxxxxxxxxxxx>
> [wens@xxxxxxxx: Support different DC-DC work frequency ranges]
> Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
> Reviewed-by: Mark Brown <broonie@xxxxxxxxxx>

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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