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Date: Mon, 23 Jun 2014 09:46:35 +0000
From: "Yang, Wenyou" <Wenyou.Yang@...el.com>
To: Beniamino Galvani <b.galvani@...il.com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>
CC: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
"Mark Rutland" <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
"Heiko Stuebner" <heiko@...ech.de>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH 3/5] regulator: act8865: prepare support for other
act88xx devices
> -----Original Message-----
> From: Beniamino Galvani [mailto:b.galvani@...il.com]
> Sent: Sunday, June 22, 2014 11:32 PM
> To: Liam Girdwood; Mark Brown
> Cc: Yang, Wenyou; Rob Herring; Pawel Moll; Mark Rutland; Ian Campbell;
> Kumar Gala; Heiko Stuebner; devicetree@...r.kernel.org; linux-
> doc@...r.kernel.org; linux-kernel@...r.kernel.org; linux-arm-
> kernel@...ts.infradead.org; Beniamino Galvani
> Subject: [PATCH 3/5] regulator: act8865: prepare support for other
> act88xx devices
>
> This patch prepares support for other devices in the act88xx family of
> PMUs manufactured by Active-Semi.
>
> http://www.active-semi.com/products/power-management-units/act88xx/
>
> Signed-off-by: Beniamino Galvani <b.galvani@...il.com>
> ---
> drivers/regulator/act8865-regulator.c | 212 +++++++++++++------------
> --------
> include/linux/regulator/act8865.h | 6 +-
> 2 files changed, 88 insertions(+), 130 deletions(-)
>
> diff --git a/drivers/regulator/act8865-regulator.c
> b/drivers/regulator/act8865-regulator.c
> index b03a0e8..c604b34 100644
> --- a/drivers/regulator/act8865-regulator.c
> +++ b/drivers/regulator/act8865-regulator.c
> @@ -1,6 +1,7 @@
> /*
> - * act8865-regulator.c - Voltage regulation for the active-semi
> ACT8865
> - * http://www.active-semi.com/sheets/ACT8865_Datasheet.pdf
> + * act8865-regulator.c - Voltage regulation for active-semi ACT88xx
> + PMUs
> + *
> + * http://www.active-semi.com/products/power-management-units/act88xx/
> *
> * Copyright (C) 2013 Atmel Corporation
> *
> @@ -70,7 +71,7 @@ static const struct regmap_config
> act8865_regmap_config = {
> .val_bits = 8,
> };
>
> -static const struct regulator_linear_range act8865_volatge_ranges[] =
> {
> +static const struct regulator_linear_range act8865_voltage_ranges[] =
> {
> REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
> REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
> REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), @@ -86,110
> +87,35 @@ static struct regulator_ops act8865_ops = {
> .is_enabled = regulator_is_enabled_regmap,
> };
>
> -static const struct regulator_desc act8865_reg[] = {
> - {
> - .name = "DCDC_REG1",
> - .id = ACT8865_ID_DCDC1,
> - .ops = &act8865_ops,
> - .type = REGULATOR_VOLTAGE,
> - .n_voltages = ACT8865_VOLTAGE_NUM,
> - .linear_ranges = act8865_volatge_ranges,
> - .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
> - .vsel_reg = ACT8865_DCDC1_VSET1,
> - .vsel_mask = ACT8865_VSEL_MASK,
> - .enable_reg = ACT8865_DCDC1_CTRL,
> - .enable_mask = ACT8865_ENA,
> - .owner = THIS_MODULE,
> - },
> - {
> - .name = "DCDC_REG2",
> - .id = ACT8865_ID_DCDC2,
> - .ops = &act8865_ops,
> - .type = REGULATOR_VOLTAGE,
> - .n_voltages = ACT8865_VOLTAGE_NUM,
> - .linear_ranges = act8865_volatge_ranges,
> - .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
> - .vsel_reg = ACT8865_DCDC2_VSET1,
> - .vsel_mask = ACT8865_VSEL_MASK,
> - .enable_reg = ACT8865_DCDC2_CTRL,
> - .enable_mask = ACT8865_ENA,
> - .owner = THIS_MODULE,
> - },
> - {
> - .name = "DCDC_REG3",
> - .id = ACT8865_ID_DCDC3,
> - .ops = &act8865_ops,
> - .type = REGULATOR_VOLTAGE,
> - .n_voltages = ACT8865_VOLTAGE_NUM,
> - .linear_ranges = act8865_volatge_ranges,
> - .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
> - .vsel_reg = ACT8865_DCDC3_VSET1,
> - .vsel_mask = ACT8865_VSEL_MASK,
> - .enable_reg = ACT8865_DCDC3_CTRL,
> - .enable_mask = ACT8865_ENA,
> - .owner = THIS_MODULE,
> - },
> - {
> - .name = "LDO_REG1",
> - .id = ACT8865_ID_LDO1,
> - .ops = &act8865_ops,
> - .type = REGULATOR_VOLTAGE,
> - .n_voltages = ACT8865_VOLTAGE_NUM,
> - .linear_ranges = act8865_volatge_ranges,
> - .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
> - .vsel_reg = ACT8865_LDO1_VSET,
> - .vsel_mask = ACT8865_VSEL_MASK,
> - .enable_reg = ACT8865_LDO1_CTRL,
> - .enable_mask = ACT8865_ENA,
> - .owner = THIS_MODULE,
> - },
> - {
> - .name = "LDO_REG2",
> - .id = ACT8865_ID_LDO2,
> - .ops = &act8865_ops,
> - .type = REGULATOR_VOLTAGE,
> - .n_voltages = ACT8865_VOLTAGE_NUM,
> - .linear_ranges = act8865_volatge_ranges,
> - .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
> - .vsel_reg = ACT8865_LDO2_VSET,
> - .vsel_mask = ACT8865_VSEL_MASK,
> - .enable_reg = ACT8865_LDO2_CTRL,
> - .enable_mask = ACT8865_ENA,
> - .owner = THIS_MODULE,
> - },
> - {
> - .name = "LDO_REG3",
> - .id = ACT8865_ID_LDO3,
> - .ops = &act8865_ops,
> - .type = REGULATOR_VOLTAGE,
> - .n_voltages = ACT8865_VOLTAGE_NUM,
> - .linear_ranges = act8865_volatge_ranges,
> - .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
> - .vsel_reg = ACT8865_LDO3_VSET,
> - .vsel_mask = ACT8865_VSEL_MASK,
> - .enable_reg = ACT8865_LDO3_CTRL,
> - .enable_mask = ACT8865_ENA,
> - .owner = THIS_MODULE,
> - },
> - {
> - .name = "LDO_REG4",
> - .id = ACT8865_ID_LDO4,
> - .ops = &act8865_ops,
> - .type = REGULATOR_VOLTAGE,
> - .n_voltages = ACT8865_VOLTAGE_NUM,
> - .linear_ranges = act8865_volatge_ranges,
> - .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
> - .vsel_reg = ACT8865_LDO4_VSET,
> - .vsel_mask = ACT8865_VSEL_MASK,
> - .enable_reg = ACT8865_LDO4_CTRL,
> - .enable_mask = ACT8865_ENA,
> - .owner = THIS_MODULE,
> - },
> +#define ACT88xx_REG(_name, _family, _id, _vsel_reg) \
> + [_family##_ID_##_id] = { \
> + .name = _name, \
> + .id = _family##_ID_##_id, \
> + .type = REGULATOR_VOLTAGE, \
> + .ops = &act8865_ops, \
> + .n_voltages = ACT8865_VOLTAGE_NUM, \
> + .linear_ranges = act8865_voltage_ranges, \
> + .n_linear_ranges = ARRAY_SIZE(act8865_voltage_ranges), \
> + .vsel_reg = _family##_##_id##_##_vsel_reg, \
> + .vsel_mask = ACT8865_VSEL_MASK, \
> + .enable_reg = _family##_##_id##_CTRL, \
> + .enable_mask = ACT8865_ENA, \
> + .owner = THIS_MODULE, \
> + }
> +
> +static const struct regulator_desc act8865_regulators[] = {
> + ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1),
> + ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1),
> + ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1),
> + ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET),
> + ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET),
> + ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET),
> + ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET),
> };
>
> #ifdef CONFIG_OF
> static const struct of_device_id act8865_dt_ids[] = {
> - { .compatible = "active-semi,act8865" },
> + { .compatible = "active-semi,act8865", .data = (void *)ACT8865 },
> { }
> };
> MODULE_DEVICE_TABLE(of, act8865_dt_ids); @@ -206,7 +132,9 @@ static
> struct of_regulator_match act8865_matches[] = {
>
> static int act8865_pdata_from_dt(struct device *dev,
> struct device_node **of_node,
> - struct act8865_platform_data *pdata)
> + struct act8865_platform_data *pdata,
> + struct of_regulator_match *matches,
> + int num_matches)
> {
> int matched, i;
> struct device_node *np;
> @@ -218,26 +146,25 @@ static int act8865_pdata_from_dt(struct device
> *dev,
> return -EINVAL;
> }
>
> - matched = of_regulator_match(dev, np,
> - act8865_matches, ARRAY_SIZE(act8865_matches));
> + matched = of_regulator_match(dev, np, matches, num_matches);
> of_node_put(np);
> if (matched <= 0)
> return matched;
>
> pdata->regulators = devm_kzalloc(dev,
> - sizeof(struct act8865_regulator_data) *
> - ARRAY_SIZE(act8865_matches), GFP_KERNEL);
> + sizeof(struct act8865_regulator_data) *
> + num_matches, GFP_KERNEL);
> if (!pdata->regulators)
> return -ENOMEM;
>
> - pdata->num_regulators = ARRAY_SIZE(act8865_matches);
> + pdata->num_regulators = num_matches;
> regulator = pdata->regulators;
>
> - for (i = 0; i < ARRAY_SIZE(act8865_matches); i++) {
> + for (i = 0; i < num_matches; i++) {
> regulator->id = i;
> - regulator->name = act8865_matches[i].name;
> - regulator->platform_data = act8865_matches[i].init_data;
> - of_node[i] = act8865_matches[i].of_node;
> + regulator->name = matches[i].name;
> + regulator->platform_data = matches[i].init_data;
> + of_node[i] = matches[i].of_node;
> regulator++;
> }
>
> @@ -269,35 +196,59 @@ static struct regulator_init_data }
>
> static int act8865_pmic_probe(struct i2c_client *client,
> - const struct i2c_device_id *i2c_id)
> + const struct i2c_device_id *i2c_id)
> {
> - struct regulator_dev *rdev;
> + static const struct regulator_desc *regulators;
> + struct act8865_platform_data pdata_of, *pdata;
> + struct of_regulator_match *matches;
> struct device *dev = &client->dev;
> - struct act8865_platform_data *pdata = dev_get_platdata(dev);
> - struct regulator_config config = { };
> + int i, ret, num_regulators, error;
> + struct device_node **of_node;
> struct act8865 *act8865;
> - struct device_node *of_node[ACT8865_REG_NUM];
> - int i;
> - int ret = -EINVAL;
> - int error;
> + unsigned long type;
> +
> + pdata = dev_get_platdata(dev);
>
> if (dev->of_node && !pdata) {
> const struct of_device_id *id;
> - struct act8865_platform_data pdata_of;
>
> id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
> if (!id)
> return -ENODEV;
>
> - ret = act8865_pdata_from_dt(dev, of_node, &pdata_of);
> + type = (unsigned long) id->data;
> + } else {
> + type = i2c_id->driver_data;
> + }
> +
> + switch (type) {
> + case ACT8865:
> + matches = act8865_matches;
> + regulators = act8865_regulators;
> + num_regulators = ARRAY_SIZE(act8865_regulators);
> + break;
> + default:
> + dev_err(dev, "invalid device id %lu\n", type);
> + return -EINVAL;
> + }
> +
> + of_node = devm_kzalloc(dev, sizeof(struct device_node *) *
> + num_regulators, GFP_KERNEL);
> + if (!of_node)
> + return -ENOMEM;
> +
> + if (dev->of_node && !pdata) {
> + ret = act8865_pdata_from_dt(dev, of_node, &pdata_of,
> matches,
> + num_regulators);
> if (ret < 0)
> return ret;
>
> pdata = &pdata_of;
> }
>
> - if (pdata->num_regulators > ACT8865_REG_NUM) {
> - dev_err(dev, "Too many regulators found!\n");
> + if (pdata->num_regulators > num_regulators) {
> + dev_err(dev, "too many regulators: %d\n",
> + pdata->num_regulators);
> return -EINVAL;
> }
>
> @@ -314,8 +265,10 @@ static int act8865_pmic_probe(struct i2c_client
> *client,
> }
>
> /* Finally register devices */
> - for (i = 0; i < ACT8865_REG_NUM; i++) {
> - const struct regulator_desc *desc = &act8865_reg[i];
> + for (i = 0; i < num_regulators; i++) {
> + const struct regulator_desc *desc = ®ulators[i];
> + struct regulator_config config = { };
> + struct regulator_dev *rdev;
>
> config.dev = dev;
> config.init_data = act8865_get_init_data(desc->id, pdata);
> @@ -331,12 +284,13 @@ static int act8865_pmic_probe(struct i2c_client
> *client,
> }
>
> i2c_set_clientdata(client, act8865);
> + devm_kfree(dev, of_node);
>
> return 0;
> }
>
> static const struct i2c_device_id act8865_ids[] = {
> - { "act8865", 0 },
> + { .name = "act8865", .driver_data = ACT8865 },
> { },
> };
> MODULE_DEVICE_TABLE(i2c, act8865_ids);
> @@ -352,6 +306,6 @@ static struct i2c_driver act8865_pmic_driver = {
>
> module_i2c_driver(act8865_pmic_driver);
>
> -MODULE_DESCRIPTION("active-semi act8865 voltage regulator driver");
> +MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver");
> MODULE_AUTHOR("Wenyou Yang <wenyou.yang@...el.com>");
> MODULE_LICENSE("GPL v2"); diff --git
> a/include/linux/regulator/act8865.h b/include/linux/regulator/act8865.h
> index 49206c1..b49be81 100644
> --- a/include/linux/regulator/act8865.h
> +++ b/include/linux/regulator/act8865.h
> @@ -1,5 +1,5 @@
> /*
> - * act8865.h -- Voltage regulation for the active-semi act8865
> + * act8865.h -- Voltage regulation for active-semi act88xx PMUs
> *
> * Copyright (C) 2013 Atmel Corporation.
> *
> @@ -29,6 +29,10 @@ enum {
> ACT8865_REG_NUM,
> };
>
> +enum {
> + ACT8865,
> +};
> +
> /**
> * act8865_regulator_data - regulator data
> * @id: regulator id
> --
> 1.7.10.4
Tested on at91-sama5d3_xplained with ACT8865
Tested-by Wenyou.Yang <wenyou.yang@...el.com>
Best Regards,
Wenyou Yang
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