[PATCH v4 08/17] regulator: arizona-ldo1: Add support for Cirrus Logic Madera codecs

Richard Fitzgerald
2017-07-28T09:47:44Z

This adds a new driver identity "madera-ldo1" and probe function
so that this driver can be used to control the LDO1 regulator on
some Cirrus Logic Madera codecs.

Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
---
No changes since V3

drivers/regulator/Kconfig | 8 ++--
drivers/regulator/arizona-ldo1.c | 82 +++++++++++++++++++++++++++++++++++++++-
2 files changed, 85 insertions(+), 5 deletions(-)

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index ed5679f..85c5f7a 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -126,12 +126,12 @@ config REGULATOR_AB8500
signal AB8500 PMIC

config REGULATOR_ARIZONA_LDO1
- tristate "Wolfson Arizona class devices LDO1"
- depends on MFD_ARIZONA
+ tristate "Cirrus Madera and Wolfson Arizona class devices LDO1"
+ depends on MFD_ARIZONA || MFD_MADERA
depends on SND_SOC
help
- Support for the LDO1 regulators found on Wolfson Arizona class
- devices.
+ Support for the LDO1 regulators found on Cirrus Logic Madera codecs
+ and Wolfson Arizona codecs.

config REGULATOR_ARIZONA_MICSUPP
tristate "Cirrus Madera and Wolfson Arizona class devices MICSUPP"
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
index 96fddff..c64625e 100644
--- a/drivers/regulator/arizona-ldo1.c
+++ b/drivers/regulator/arizona-ldo1.c
@@ -31,6 +31,10 @@
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>

+#include <linux/mfd/madera/core.h>
+#include <linux/mfd/madera/pdata.h>
+#include <linux/mfd/madera/registers.h>
+
struct arizona_ldo1 {
struct regulator_dev *regulator;
struct regmap *regmap;
@@ -188,6 +192,31 @@ static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
.num_consumer_supplies = 1,
};

+static const struct regulator_desc madera_ldo1 = {
+ .name = "LDO1",
+ .supply_name = "LDOVDD",
+ .type = REGULATOR_VOLTAGE,
+ .ops = &arizona_ldo1_ops,
+
+ .vsel_reg = MADERA_LDO1_CONTROL_1,
+ .vsel_mask = MADERA_LDO1_VSEL_MASK,
+ .min_uV = 900000,
+ .uV_step = 25000,
+ .n_voltages = 13,
+ .enable_time = 3000,
+
+ .owner = THIS_MODULE,
+};
+
+static const struct regulator_init_data madera_ldo1_default = {
+ .constraints = {
+ .min_uV = 1200000,
+ .max_uV = 1200000,
+ .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+ },
+ .num_consumer_supplies = 1,
+};
+
static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata,
struct regulator_config *config,
const struct regulator_desc *desc,
@@ -341,6 +370,32 @@ static int arizona_ldo1_probe(struct platform_device *pdev)
return ret;
}

+static int madera_ldo1_probe(struct platform_device *pdev)
+{
+ struct madera *madera = dev_get_drvdata(pdev->dev.parent);
+ struct arizona_ldo1 *ldo1;
+ bool external_dcvdd;
+ int ret;
+
+ ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
+ if (!ldo1)
+ return -ENOMEM;
+
+ ldo1->regmap = madera->regmap;
+
+ ldo1->init_data = madera_ldo1_default;
+
+ ret = arizona_ldo1_common_init(pdev, ldo1, &arizona_ldo1,
+ &madera->pdata.ldo1,
+ &external_dcvdd);
+ if (ret)
+ return ret;
+
+ madera->internal_dcvdd = !external_dcvdd;
+
+ return 0;
+}
+
static struct platform_driver arizona_ldo1_driver = {
.probe = arizona_ldo1_probe,
.driver = {
@@ -348,10 +403,35 @@ static int arizona_ldo1_probe(struct platform_device *pdev)
},
};

-module_platform_driver(arizona_ldo1_driver);
+static struct platform_driver madera_ldo1_driver = {
+ .probe = madera_ldo1_probe,
+ .driver = {
+ .name = "madera-ldo1",
+ },
+};
+
+static struct platform_driver * const madera_ldo1_drivers[] = {
+ &arizona_ldo1_driver,
+ &madera_ldo1_driver,
+};
+
+static int __init arizona_ldo1_init(void)
+{
+ return platform_register_drivers(madera_ldo1_drivers,
+ ARRAY_SIZE(madera_ldo1_drivers));
+}
+module_init(arizona_ldo1_init);
+
+static void __exit madera_ldo1_exit(void)
+{
+ platform_unregister_drivers(madera_ldo1_drivers,
+ ARRAY_SIZE(madera_ldo1_drivers));
+}
+module_exit(madera_ldo1_exit);

/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Arizona LDO1 driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:arizona-ldo1");
+MODULE_ALIAS("platform:madera-ldo1");
--
1.9.1