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Date: Sat, 23 Jun 2012 13:18:35 +0100
From: Mark Brown <broonie@...nsource.wolfsonmicro.com>
To: Liam Girdwood <lrg@...com>
Cc: linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com,
Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] regulator: Add driver for Arizona LDO1
Arizona class devices feature an integrated LDO which is intended to
supply the digital core for the device. Provide a driver offering
minimal control of this regulator.
Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---
drivers/regulator/Makefile | 2 +-
drivers/regulator/arizona-ldo1.c | 134 ++++++++++++++++++++++++++++++++++++++
2 files changed, 135 insertions(+), 1 deletion(-)
create mode 100644 drivers/regulator/arizona-ldo1.c
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index ec4a0cf..c746088 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -15,7 +15,7 @@ obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o
obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o
obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o
obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o
-obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o
+obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o arizona-ldo1.o
obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o
obj-$(CONFIG_REGULATOR_DBX500_PRCMU) += dbx500-prcmu.o
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
new file mode 100644
index 0000000..51f02ca
--- /dev/null
+++ b/drivers/regulator/arizona-ldo1.c
@@ -0,0 +1,134 @@
+/*
+ * arizona-ldo1.c -- LDO1 supply for Arizona devices
+ *
+ * Copyright 2012 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@...nsource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/arizona/core.h>
+#include <linux/mfd/arizona/pdata.h>
+#include <linux/mfd/arizona/registers.h>
+
+struct arizona_ldo1 {
+ struct regulator_dev *regulator;
+ struct arizona *arizona;
+
+ struct regulator_consumer_supply supply;
+ struct regulator_init_data init_data;
+};
+
+static struct regulator_ops arizona_ldo1_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+};
+
+static const struct regulator_desc arizona_ldo1 = {
+ .name = "LDO1",
+ .supply_name = "LDOVDD",
+ .type = REGULATOR_VOLTAGE,
+ .ops = &arizona_ldo1_ops,
+
+ .vsel_reg = ARIZONA_LDO1_CONTROL_1,
+ .vsel_mask = ARIZONA_LDO1_VSEL_MASK,
+ .min_uV = 900000,
+ .uV_step = 50000,
+ .n_voltages = 7,
+
+ .owner = THIS_MODULE,
+};
+
+static const struct regulator_init_data arizona_ldo1_default = {
+ .num_consumer_supplies = 1,
+};
+
+static __devinit int arizona_ldo1_probe(struct platform_device *pdev)
+{
+ struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
+ struct regulator_config config = { };
+ struct arizona_ldo1 *ldo1;
+ int ret;
+
+ ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
+ if (ldo1 == NULL) {
+ dev_err(&pdev->dev, "Unable to allocate private data\n");
+ return -ENOMEM;
+ }
+
+ ldo1->arizona = arizona;
+
+ /*
+ * Since the chip usually supplies itself we provide some
+ * default init_data for it. This will be overridden with
+ * platform data if provided.
+ */
+ ldo1->init_data = arizona_ldo1_default;
+ ldo1->init_data.consumer_supplies = &ldo1->supply;
+ ldo1->supply.supply = "DCVDD";
+ ldo1->supply.dev_name = dev_name(arizona->dev);
+
+ config.dev = arizona->dev;
+ config.driver_data = ldo1;
+ config.regmap = arizona->regmap;
+
+ if (arizona->pdata.ldo1)
+ config.init_data = arizona->pdata.ldo1;
+ else
+ config.init_data = &ldo1->init_data;
+
+ ldo1->regulator = regulator_register(&arizona_ldo1, &config);
+ if (IS_ERR(ldo1->regulator)) {
+ ret = PTR_ERR(ldo1->regulator);
+ dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
+ ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, ldo1);
+
+ return 0;
+}
+
+static __devexit int arizona_ldo1_remove(struct platform_device *pdev)
+{
+ struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);
+
+ regulator_unregister(ldo1->regulator);
+
+ return 0;
+}
+
+static struct platform_driver arizona_ldo1_driver = {
+ .probe = arizona_ldo1_probe,
+ .remove = __devexit_p(arizona_ldo1_remove),
+ .driver = {
+ .name = "arizona-ldo1",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(arizona_ldo1_driver);
+
+/* Module information */
+MODULE_AUTHOR("Mark Brown <broonie@...nsource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("Arizona LDO1 driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:arizona-ldo1");
--
1.7.10
--
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