power: supply: bq24190_charger: Export 5V boost converter as regulator

Register the 5V boost converter as a regulator named "usb_otg_vbus".

This commit also adds support for bq24190_platform_data, through which
non device-tree platforms can pass the regulator_init_data (containing
mappings for the consumer amongst other things).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
index fa711c106b6332b1781c315907e7bb41c44aa65d..e606a078b0dde8602c1b742fdd2a6def8808645c 100644 (file)
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c
@@ -16,6 +16,9 @@
 #include <linux/of_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/power_supply.h>
+#include <linux/power/bq24190_charger.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
 #include <linux/workqueue.h>
 #include <linux/gpio.h>
 #include <linux/i2c.h>
@@ -513,6 +516,111 @@ static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi)
 static inline void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi) {}
 #endif
 
+#ifdef CONFIG_REGULATOR
+static int bq24190_set_charge_mode(struct regulator_dev *dev, u8 val)
+{
+       struct bq24190_dev_info *bdi = rdev_get_drvdata(dev);
+       int ret;
+
+       ret = pm_runtime_get_sync(bdi->dev);
+       if (ret < 0) {
+               dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", ret);
+               pm_runtime_put_noidle(bdi->dev);
+               return ret;
+       }
+
+       ret = bq24190_write_mask(bdi, BQ24190_REG_POC,
+                                BQ24190_REG_POC_CHG_CONFIG_MASK,
+                                BQ24190_REG_POC_CHG_CONFIG_SHIFT, val);
+
+       pm_runtime_mark_last_busy(bdi->dev);
+       pm_runtime_put_autosuspend(bdi->dev);
+
+       return ret;
+}
+
+static int bq24190_vbus_enable(struct regulator_dev *dev)
+{
+       return bq24190_set_charge_mode(dev, BQ24190_REG_POC_CHG_CONFIG_OTG);
+}
+
+static int bq24190_vbus_disable(struct regulator_dev *dev)
+{
+       return bq24190_set_charge_mode(dev, BQ24190_REG_POC_CHG_CONFIG_CHARGE);
+}
+
+static int bq24190_vbus_is_enabled(struct regulator_dev *dev)
+{
+       struct bq24190_dev_info *bdi = rdev_get_drvdata(dev);
+       int ret;
+       u8 val;
+
+       ret = pm_runtime_get_sync(bdi->dev);
+       if (ret < 0) {
+               dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", ret);
+               pm_runtime_put_noidle(bdi->dev);
+               return ret;
+       }
+
+       ret = bq24190_read_mask(bdi, BQ24190_REG_POC,
+                               BQ24190_REG_POC_CHG_CONFIG_MASK,
+                               BQ24190_REG_POC_CHG_CONFIG_SHIFT, &val);
+
+       pm_runtime_mark_last_busy(bdi->dev);
+       pm_runtime_put_autosuspend(bdi->dev);
+
+       return ret ? ret : val == BQ24190_REG_POC_CHG_CONFIG_OTG;
+}
+
+static const struct regulator_ops bq24190_vbus_ops = {
+       .enable = bq24190_vbus_enable,
+       .disable = bq24190_vbus_disable,
+       .is_enabled = bq24190_vbus_is_enabled,
+};
+
+static const struct regulator_desc bq24190_vbus_desc = {
+       .name = "usb_otg_vbus",
+       .type = REGULATOR_VOLTAGE,
+       .owner = THIS_MODULE,
+       .ops = &bq24190_vbus_ops,
+       .fixed_uV = 5000000,
+       .n_voltages = 1,
+};
+
+static const struct regulator_init_data bq24190_vbus_init_data = {
+       .constraints = {
+               .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+       },
+};
+
+static int bq24190_register_vbus_regulator(struct bq24190_dev_info *bdi)
+{
+       struct bq24190_platform_data *pdata = bdi->dev->platform_data;
+       struct regulator_config cfg = { };
+       struct regulator_dev *reg;
+       int ret = 0;
+
+       cfg.dev = bdi->dev;
+       if (pdata && pdata->regulator_init_data)
+               cfg.init_data = pdata->regulator_init_data;
+       else
+               cfg.init_data = &bq24190_vbus_init_data;
+       cfg.driver_data = bdi;
+       reg = devm_regulator_register(bdi->dev, &bq24190_vbus_desc, &cfg);
+       if (IS_ERR(reg)) {
+               ret = PTR_ERR(reg);
+               dev_err(bdi->dev, "Can't register regulator: %d\n", ret);
+       }
+
+       return ret;
+}
+#else
+static int bq24190_register_vbus_regulator(struct bq24190_dev_info *bdi)
+{
+       return 0;
+}
+#endif
+
 static int bq24190_set_config(struct bq24190_dev_info *bdi)
 {
        int ret;
@@ -1740,6 +1848,10 @@ static int bq24190_probe(struct i2c_client *client,
                goto out_sysfs;
        }
 
+       ret = bq24190_register_vbus_regulator(bdi);
+       if (ret < 0)
+               goto out_sysfs;
+
        if (bdi->extcon) {
                INIT_DELAYED_WORK(&bdi->extcon_work, bq24190_extcon_work);
                bdi->extcon_nb.notifier_call = bq24190_extcon_event;

diff --git a/include/linux/power/bq24190_charger.h b/include/linux/power/bq24190_charger.h
new file mode 100644 (file)
index 0000000..45ce7f1
--- /dev/null
+++ b/include/linux/power/bq24190_charger.h
@@ -0,0 +1,18 @@
+/*
+ * Platform data for the TI bq24190 battery charger driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _BQ24190_CHARGER_H_
+#define _BQ24190_CHARGER_H_
+
+#include <linux/regulator/machine.h>
+
+struct bq24190_platform_data {
+       const struct regulator_init_data *regulator_init_data;
+};
+
+#endif