regulator: TPS65090: Add regulator support
venu byravarasu [Tue, 10 Jan 2012 08:54:01 +0000 (13:54 +0530)]
Add regulator changes needed to support TPS65090.

bug 909648

Change-Id: Ia88e6706051f7a7e920b01c656f64385b98fc33a
Signed-off-by: venu byravarasu <vbyravarasu@nvidia.com>
Reviewed-on: http://git-master/r/73144
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/74895
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>

Rebase-Id: R0a66b655a21358c1ee2569f1d822785d2391ad27

drivers/regulator/Kconfig
drivers/regulator/Makefile
drivers/regulator/tps65090-regulator.c [new file with mode: 0644]
include/linux/regulator/tps65090-regulator.h [new file with mode: 0644]

index 095be23..b138e4e 100644 (file)
@@ -358,6 +358,12 @@ config REGULATOR_TPS6591X
        help
          This driver supports TPS6591X voltage regulator chips.
 
+config REGULATOR_TPS65090
+       tristate "TI TPS65090 Power regulators"
+       depends on MFD_TPS65090
+       help
+         This driver supports TPS65090 voltage regulator chips.
+
 config REGULATOR_TPS6236X
        tristate "TI TPS6236X DC-DC core power suply regulators"
        default n
index 87d18d1..0413b59 100644 (file)
@@ -32,6 +32,7 @@ obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
 obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6586X) += tps6586x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6591X) += tps6591x-regulator.o
+obj-$(CONFIG_REGULATOR_TPS65090) += tps65090-regulator.o
 obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
 obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o
 obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
diff --git a/drivers/regulator/tps65090-regulator.c b/drivers/regulator/tps65090-regulator.c
new file mode 100644 (file)
index 0000000..8249a4b
--- /dev/null
@@ -0,0 +1,200 @@
+/*
+ * drivers/regulator/tps65090-regulator.c
+ *
+ * Regulator driver for tps65090 power management chip.
+ *
+ * Copyright (C) 2012 NVIDIA Corporation
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/tps65090.h>
+#include <linux/regulator/tps65090-regulator.h>
+
+struct tps65090_regulator {
+       int             id;
+       /* Regulator register address.*/
+       u8              reg_en_reg;
+       u8              en_bit;
+
+       /* used by regulator core */
+       struct regulator_desc   desc;
+
+       /* Device */
+       struct device           *dev;
+};
+
+
+static inline struct device *to_tps65090_dev(struct regulator_dev *rdev)
+{
+       return rdev_get_dev(rdev)->parent->parent;
+}
+static int tps65090_reg_is_enabled(struct regulator_dev *rdev)
+{
+       struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps65090_dev(rdev);
+       uint8_t control;
+       int ret;
+
+       ret = tps65090_read(parent, ri->reg_en_reg, &control);
+       if (ret < 0) {
+               dev_err(&rdev->dev, "Error in reading reg 0x%x\n",
+                       ri->reg_en_reg);
+               return ret;
+       }
+       return (((control >> ri->en_bit) & 1) == 1);
+}
+
+static int tps65090_reg_enable(struct regulator_dev *rdev)
+{
+       struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps65090_dev(rdev);
+       int ret;
+
+       ret = tps65090_set_bits(parent, ri->reg_en_reg, ri->en_bit);
+       if (ret < 0)
+               dev_err(&rdev->dev, "Error in updating reg 0x%x\n",
+                       ri->reg_en_reg);
+       return ret;
+}
+
+static int tps65090_reg_disable(struct regulator_dev *rdev)
+{
+       struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
+       struct device *parent = to_tps65090_dev(rdev);
+       int ret;
+
+       ret = tps65090_clr_bits(parent, ri->reg_en_reg, ri->en_bit);
+       if (ret < 0)
+               dev_err(&rdev->dev, "Error in updating reg 0x%x\n",
+                       ri->reg_en_reg);
+
+       return ret;
+}
+
+static struct regulator_ops tps65090_ops = {
+       .enable         = tps65090_reg_enable,
+       .disable        = tps65090_reg_disable,
+       .is_enabled     = tps65090_reg_is_enabled,
+};
+
+#define tps65090_REG(_id, _en_reg, _en_bit, _ops)      \
+{                                                      \
+       .reg_en_reg     = _en_reg,                      \
+       .en_bit         = _en_bit,                      \
+       .id             = TPS65090_ID_##_id,            \
+       .desc = {                                       \
+               .name = tps65090_rails(_id),            \
+               .id = TPS65090_ID_##_id,                \
+               .ops = &_ops,                           \
+               .type = REGULATOR_VOLTAGE,              \
+               .owner = THIS_MODULE,                   \
+       },                                              \
+}
+
+static struct tps65090_regulator TPS65090_regulator[] = {
+       tps65090_REG(DCDC1, 12, 0, tps65090_ops),
+       tps65090_REG(DCDC2, 13, 0, tps65090_ops),
+       tps65090_REG(DCDC3, 14, 0, tps65090_ops),
+       tps65090_REG(FET1,  15, 0, tps65090_ops),
+       tps65090_REG(FET2,  16, 0, tps65090_ops),
+       tps65090_REG(FET3,  17, 0, tps65090_ops),
+       tps65090_REG(FET4,  18, 0, tps65090_ops),
+       tps65090_REG(FET5,  19, 0, tps65090_ops),
+       tps65090_REG(FET6,  20, 0, tps65090_ops),
+       tps65090_REG(FET7,  21, 0, tps65090_ops),
+};
+static inline struct tps65090_regulator *find_regulator_info(int id)
+{
+       struct tps65090_regulator *ri;
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(TPS65090_regulator); i++) {
+               ri = &TPS65090_regulator[i];
+               if (ri->desc.id == id)
+                       return ri;
+       }
+       return NULL;
+}
+static int __devinit tps65090_regulator_probe(struct platform_device *pdev)
+{
+       struct tps65090_regulator *ri = NULL;
+       struct regulator_dev *rdev;
+       struct tps65090_regulator_platform_data *tps_pdata;
+       int id = pdev->id;
+
+       dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
+
+       ri = find_regulator_info(id);
+       if (ri == NULL) {
+               dev_err(&pdev->dev, "invalid regulator ID specified\n");
+               return -EINVAL;
+       }
+       tps_pdata = pdev->dev.platform_data;
+       ri->dev = &pdev->dev;
+
+       rdev = regulator_register(&ri->desc, &pdev->dev,
+                               &tps_pdata->regulator, ri);
+       if (IS_ERR_OR_NULL(rdev)) {
+               dev_err(&pdev->dev, "failed to register regulator %s\n",
+                               ri->desc.name);
+               return PTR_ERR(rdev);
+       }
+
+       platform_set_drvdata(pdev, rdev);
+       return 0;
+}
+
+static int __devexit tps65090_regulator_remove(struct platform_device *pdev)
+{
+       struct regulator_dev *rdev = platform_get_drvdata(pdev);
+
+       regulator_unregister(rdev);
+       return 0;
+}
+
+static struct platform_driver tps65090_regulator_driver = {
+       .driver = {
+               .name   = "tps65090-regulator",
+               .owner  = THIS_MODULE,
+       },
+       .probe          = tps65090_regulator_probe,
+       .remove         = __devexit_p(tps65090_regulator_remove),
+};
+
+static int __init tps65090_regulator_init(void)
+{
+       return platform_driver_register(&tps65090_regulator_driver);
+}
+subsys_initcall(tps65090_regulator_init);
+
+static void __exit tps65090_regulator_exit(void)
+{
+       platform_driver_unregister(&tps65090_regulator_driver);
+}
+module_exit(tps65090_regulator_exit);
+
+MODULE_DESCRIPTION("tps65090 regulator driver");
+MODULE_ALIAS("platform:tps65090-regulator");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/regulator/tps65090-regulator.h b/include/linux/regulator/tps65090-regulator.h
new file mode 100644 (file)
index 0000000..341d53e
--- /dev/null
@@ -0,0 +1,60 @@
+/*
+ * include/linux/regulator/tps65090-regulator.h
+ *
+ * Interface for regulator driver for TI TPS65090 PMIC family
+ *
+ * Copyright (C) 2012 NVIDIA Corporation
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to  Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+#ifndef __REGULATOR_TPS65090_H
+#define __REGULATOR_TPS65090_H
+
+#include <linux/regulator/machine.h>
+
+#define tps65090_rails(_name) "tps65090_"#_name
+
+enum {
+       TPS65090_ID_DCDC1,
+       TPS65090_ID_DCDC2,
+       TPS65090_ID_DCDC3,
+       TPS65090_ID_FET1,
+       TPS65090_ID_FET2,
+       TPS65090_ID_FET3,
+       TPS65090_ID_FET4,
+       TPS65090_ID_FET5,
+       TPS65090_ID_FET6,
+       TPS65090_ID_FET7,
+};
+
+/*
+ * struct tps65090_regulator_platform_data
+ *
+ * @regulator: The regulator init data.
+ * @init_uV: initial micro volts which need to be set.
+ * @init_enable: Enable or do not enable the rails during initialization.
+ * @init_apply: Init parameter applied or not.
+ * @slew_rate_uV_per_us: Slew rate microvolt per microsec.
+ */
+
+struct tps65090_regulator_platform_data {
+       struct regulator_init_data regulator;
+       int slew_rate_uV_per_us;
+       unsigned int flags;
+};
+
+#endif /* __REGULATOR_TPS65090_H */