Regulator: gpio_swtich: Remove gpio_switch regulator driver

The gpio_switch regulator is NV driver developed during
tegra3 bringup time. The driver functionality is upstreamed
to mainline into fixed regulator and it is accepted by community.
The required functionality is also downstream and required client
driver is moved to use the fixed  regulator. Hence this driver
is just duplicating functionality with fixed regulator and hence
removing this.

Change-Id: I893328497644612a2267f2c24298ff2f668e75d4
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/94198
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>

3 files changed, 0 insertions, 421 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index eab0da10356c..d3cb8e6ff099 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -379,14 +379,6 @@ config REGULATOR_RICOH583
 	help
 	  This driver supports regulator driver for RICOH583 PMIC.
 
-config REGULATOR_GPIO_SWITCH
-	bool "GPIO based enable/disable of power rails."
-	default n
-	help
-	  This driver supports gpio based switch control of the power rails.
-	  Say Yes if the given platform have the rail enable through the
-	  gpios.
-
 config REGULATOR_AAT2870
 	tristate "AnalogicTech AAT2870 Regulators"
 	depends on MFD_AAT2870_CORE
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 41ddca80e0ce..4fc5c3f275ab 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -53,6 +53,5 @@ obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
 obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o
 obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
 obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o
-obj-$(CONFIG_REGULATOR_GPIO_SWITCH)	+= gpio-switch-regulator.o
 obj-$(CONFIG_REGULATOR_FAN53555) += fan53555-regulator.o
 ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/gpio-switch-regulator.c b/drivers/regulator/gpio-switch-regulator.c
deleted file mode 100644
index 55dd63675a06..000000000000
--- a/drivers/regulator/gpio-switch-regulator.c
+++ /dev/null
@@ -1,412 +0,0 @@
-/*
- * driver/regulator/gpio-switch-regulator.c
- * GPIO based switch regulator to enable/disable power rails.
- *
- * Copyright (c) 2011, 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.
- */
-
-/*#define DEBUG			1*/
-/*#define VERBOSE_DEBUG		1*/
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/platform_device.h>
-#include <linux/regulator/driver.h>
-#include <linux/regulator/machine.h>
-#include <linux/gpio.h>
-#include <linux/regulator/gpio-switch-regulator.h>
-
-struct gpio_switch_regulator {
-	struct regulator_desc		reg_desc;
-	struct regulator_init_data	reg_init_data;
-	struct regulator		*input_regulator;
-	struct regulator_dev		*rdev;
-	struct device			*dev;
-	int				gpio_nr;
-	int				pin_group;
-	bool				is_gpio_init;
-	bool				is_enable;
-	bool				active_low;
-	bool				is_init_success;
-	int				*voltages;
-	unsigned			curr_vol_sel;
-	struct gpio_switch_regulator_subdev_data *psubdev_data;
-	int (*enable_rail)(struct gpio_switch_regulator_subdev_data *sdata);
-	int (*disable_rail)(struct gpio_switch_regulator_subdev_data *sdata);
-};
-
-static int _gpio_regulator_enable(struct device *dev,
-		struct gpio_switch_regulator *ri)
-{
-	int init_val;
-	int ret;
-
-	if (ri->enable_rail) {
-		ret = ri->enable_rail(ri->psubdev_data);
-		if (ret < 0)
-			dev_err(dev, "Unable to enable rail through board api"
-			" error %d\n", ret);
-	} else {
-		init_val = (ri->active_low) ? 0 : 1;
-		ret = gpio_direction_output(ri->gpio_nr, init_val);
-		if (ret < 0)
-			dev_err(dev, "Unable to set direction %d\n",
-				ri->gpio_nr);
-	}
-	return ret;
-}
-
-static int _gpio_regulator_disable(struct device *dev,
-		struct gpio_switch_regulator *ri)
-{
-	int init_val;
-	int ret;
-
-	if (ri->disable_rail) {
-		ret = ri->disable_rail(ri->psubdev_data);
-		if (ret < 0)
-			dev_err(dev, "Unable to disable rail through "
-				"board api %d\n", ret);
-	} else {
-		init_val = (ri->active_low) ? 1 : 0;
-		ret = gpio_direction_output(ri->gpio_nr, init_val);
-		if (ret < 0)
-			dev_err(dev, "Unable to set direction %d\n",
-				ri->gpio_nr);
-	}
-	return ret;
-}
-
-static int gpio_switch_list_voltage(struct regulator_dev *rdev,
-				unsigned selector)
-{
-	struct gpio_switch_regulator *ri = rdev_get_drvdata(rdev);
-
-	if (selector < ri->reg_desc.n_voltages)
-		return ri->voltages[selector] * 1000;
-	else
-		return 0;
-}
-
-static int gpio_switch_set_voltage(struct regulator_dev *rdev,
-				   int min_uV, int max_uV, unsigned *selector)
-{
-	struct gpio_switch_regulator *ri = rdev_get_drvdata(rdev);
-	int uV;
-	bool found = false;
-	unsigned val;
-
-	for (val = 0; val < ri->reg_desc.n_voltages; val++) {
-		uV = ri->voltages[val] * 1000;
-		if (min_uV <= uV && uV <= max_uV) {
-			found = true;
-			*selector = ri->curr_vol_sel = val;
-			break;
-		}
-	}
-	if (found && ri->input_regulator)
-		return regulator_set_voltage(ri->input_regulator, min_uV,
-			max_uV);
-	ri->curr_vol_sel = 0;
-	return -EINVAL;
-}
-
-static int gpio_switch_get_voltage(struct regulator_dev *rdev)
-{
-	struct gpio_switch_regulator *ri = rdev_get_drvdata(rdev);
-	if (ri->input_regulator)
-		return regulator_get_voltage(ri->input_regulator);
-
-	if (ri->curr_vol_sel < ri->reg_desc.n_voltages)
-		return ri->voltages[ri->curr_vol_sel] * 1000;
-	return 0;
-}
-
-static int gpio_switch_regulator_enable(struct regulator_dev *rdev)
-{
-	struct gpio_switch_regulator *ri = rdev_get_drvdata(rdev);
-	int ret = 0;
-	if (ri->is_enable)
-		return 0;
-
-	if (ri->input_regulator) {
-		ret = regulator_enable(ri->input_regulator);
-		if (ret < 0) {
-			dev_err(&rdev->dev, "%s:Failed to enable regulator"
-				" Error %d\n", __func__, ret);
-			return ret;
-		}
-	}
-
-	ret = _gpio_regulator_enable(&rdev->dev, ri);
-	if (ret < 0)
-		return ret;
-	ri->is_enable = true;
-	return 0;
-}
-
-static int gpio_switch_regulator_disable(struct regulator_dev *rdev)
-{
-	struct gpio_switch_regulator *ri = rdev_get_drvdata(rdev);
-	int ret = 0;
-
-	if (!ri->is_enable)
-		return 0;
-
-	ret = _gpio_regulator_disable(&rdev->dev, ri);
-	if (ret < 0)
-		return ret;
-
-	if (ri->input_regulator) {
-		ret = regulator_disable(ri->input_regulator);
-		if (ret < 0) {
-			dev_err(&rdev->dev, "%s:Failed to disable regulator"
-				" Error %d\n", __func__, ret);
-			return ret;
-		}
-	}
-
-	ri->is_enable = false;
-	return 0;
-}
-
-static int gpio_switch_regulator_is_enabled(struct regulator_dev *rdev)
-{
-	struct gpio_switch_regulator *ri = rdev_get_drvdata(rdev);
-	int ret = 0;
-	if (ri->input_regulator) {
-		ret = regulator_is_enabled(ri->input_regulator);
-		if (!ret)
-			return ret;
-	}
-	return (ri->is_enable) ? 1 : 0;
-}
-
-static struct regulator_ops gpio_switch_regulator_ops = {
-	.list_voltage	= gpio_switch_list_voltage,
-	.get_voltage	= gpio_switch_get_voltage,
-	.set_voltage	= gpio_switch_set_voltage,
-	.is_enabled	= gpio_switch_regulator_is_enabled,
-	.enable		= gpio_switch_regulator_enable,
-	.disable	= gpio_switch_regulator_disable,
-};
-
-static int __devinit gpio_switch_regulator_probe(struct platform_device *pdev)
-{
-	struct gpio_switch_regulator *ri = NULL;
-	struct gpio_switch_regulator *gswitch_reg = NULL;
-	struct gpio_switch_regulator_platform_data *pdata;
-	struct gpio_switch_regulator_subdev_data *sdata = NULL;
-	int id = pdev->id;
-	int ret = 0;
-	int rcount;
-
-	dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
-
-	pdata = pdev->dev.platform_data;
-	if (!pdata) {
-		dev_err(&pdev->dev, "%s:No platform data Exiting\n", __func__);
-		return -ENODEV;
-	}
-
-	BUG_ON(!pdata->num_subdevs);
-
-	gswitch_reg = kzalloc(sizeof(struct gpio_switch_regulator) *
-				pdata->num_subdevs, GFP_KERNEL);
-	if (!gswitch_reg) {
-		dev_err(&pdev->dev, "%s:Failed to allocate memory\n", __func__);
-		return -ENOMEM;
-	}
-
-	for (rcount = 0; rcount < pdata->num_subdevs; ++rcount) {
-		ri = &gswitch_reg[rcount];
-		sdata = pdata->subdevs[rcount];
-
-		/* Initialize the regulator parameter */
-		ri->reg_desc.name = sdata->regulator_name;
-		ri->reg_desc.ops = &gpio_switch_regulator_ops;
-		ri->reg_desc.type = REGULATOR_VOLTAGE;
-		ri->reg_desc.id = sdata->id;
-		ri->reg_desc.n_voltages = sdata->n_voltages;
-		ri->reg_desc.owner = THIS_MODULE;
-		ri->is_init_success = false;
-
-		memcpy(&ri->reg_init_data.constraints, &sdata->constraints,
-				sizeof(struct regulation_constraints));
-
-		/* Initialize min and maximum contraint voltage if it is not
-		 * define in platform device */
-		if (!sdata->constraints.min_uV)
-			ri->reg_init_data.constraints.min_uV = 1000 *
-						sdata->voltages[0];
-
-		if (!sdata->constraints.max_uV)
-			ri->reg_init_data.constraints.max_uV = 1000 *
-					sdata->voltages[sdata->n_voltages - 1];
-
-		ri->reg_init_data.num_consumer_supplies =
-						sdata->num_consumer_supplies;
-		ri->reg_init_data.consumer_supplies = sdata->consumer_supplies;
-
-		ri->input_regulator = NULL;
-		ri->is_gpio_init = false;
-		ri->is_enable = (sdata->init_state) ? true : false;
-		ri->voltages = sdata->voltages;
-		ri->psubdev_data = sdata;
-		ri->gpio_nr = sdata->gpio_nr;
-		ri->active_low = sdata->active_low;
-		ri->dev = &pdev->dev;
-		ri->enable_rail = sdata->enable_rail;
-		ri->disable_rail = sdata->disable_rail;
-		ri->pin_group = sdata->pin_group;
-
-		/* Checking for board APIs enable/disable rail */
-		if (ri->enable_rail || ri->disable_rail)
-			BUG_ON(!(ri->enable_rail && ri->disable_rail));
-
-		/* Get the regulator structure if input supply is available */
-		if (sdata->input_supply) {
-			ri->input_regulator = regulator_get(NULL,
-							sdata->input_supply);
-			if (IS_ERR_OR_NULL(ri->input_regulator)) {
-				dev_err(&pdev->dev, "Unable to get regu"
-					"lator %s\n", sdata->input_supply);
-				ret = -ENODEV;
-				goto reg_get_fail;
-			}
-			if (ri->is_enable) {
-				ret = regulator_enable(ri->input_regulator);
-				if (ret < 0) {
-					dev_err(&pdev->dev, "Unable to enable "
-						"regulator %s\n",
-						sdata->input_supply);
-					goto reg_en_fail;
-				}
-			}
-		}
-
-		/* Initialize gpios */
-		ret = gpio_request(ri->gpio_nr, sdata->regulator_name);
-		if (ret < 0) {
-			dev_err(&pdev->dev, "Unable to request gpio %d\n",
-					ri->gpio_nr);
-			goto gpio_req_fail;
-		}
-
-		if (ri->is_enable)
-			ret = _gpio_regulator_enable(&pdev->dev, ri);
-		else
-			ret = _gpio_regulator_disable(&pdev->dev, ri);
-		if (ret < 0)
-			goto reg_cont_fail;
-
-		ri->is_gpio_init = true;
-
-		ri->rdev = regulator_register(&ri->reg_desc, &pdev->dev,
-					&ri->reg_init_data, ri);
-		if (IS_ERR_OR_NULL(ri->rdev)) {
-			dev_err(&pdev->dev, "Failed to register regulator %s\n",
-							ri->reg_desc.name);
-			ret = PTR_ERR(ri->rdev);
-			goto reg_reg_fail;
-		}
-
-		/* If everything success then continue for next registration */
-		ri->is_init_success = true;
-		continue;
-
-		/* Cleanup the current registration and continue for next
-		 * registration*/
-reg_reg_fail:
-		if (ri->is_enable)
-			_gpio_regulator_disable(&pdev->dev, ri);
-reg_cont_fail:
-		gpio_free(ri->gpio_nr);
-gpio_req_fail:
-		if (ri->is_enable && ri->input_regulator)
-			regulator_disable(ri->input_regulator);
-reg_en_fail:
-		if (ri->input_regulator) {
-			regulator_put(ri->input_regulator);
-			ri->input_regulator = NULL;
-		}
-reg_get_fail:
-		dev_err(&pdev->dev, "Unable to register regulator %s\n",
-							sdata->regulator_name);
-	}
-
-	platform_set_drvdata(pdev, gswitch_reg);
-	return 0;
-}
-
-static int __devexit gpio_switch_regulator_remove(struct platform_device *pdev)
-{
-	struct gpio_switch_regulator *ri = NULL;
-	struct gpio_switch_regulator *gswitch_reg = platform_get_drvdata(pdev);
-	int i;
-	struct gpio_switch_regulator_platform_data *pdata;
-
-	pdata = pdev->dev.platform_data;
-
-	/* Unregister devices in reverse order */
-	for (i = pdata->num_subdevs; i; --i) {
-		ri = &gswitch_reg[i - 1];
-		/* If registration was not success, then do not release */
-		if (!ri->is_init_success)
-			continue;
-
-		if (ri->is_enable)
-			_gpio_regulator_disable(&pdev->dev, ri);
-
-		if (ri->input_regulator) {
-			if (ri->is_enable)
-				regulator_disable(ri->input_regulator);
-			regulator_put(ri->input_regulator);
-		}
-
-		regulator_unregister(ri->rdev);
-		gpio_free(ri->gpio_nr);
-	}
-
-	kfree(gswitch_reg);
-	platform_set_drvdata(pdev, NULL);
-	return 0;
-}
-
-static struct platform_driver gpio_switch_regulator_driver = {
-	.driver	= {
-		.name	= "gpio-switch-regulator",
-		.owner	= THIS_MODULE,
-	},
-	.probe		= gpio_switch_regulator_probe,
-	.remove		= __devexit_p(gpio_switch_regulator_remove),
-};
-
-static int __init gpio_switch_regulator_init(void)
-{
-	return platform_driver_register(&gpio_switch_regulator_driver);
-}
-
-static void __exit gpio_switch_regulator_exit(void)
-{
-	platform_driver_unregister(&gpio_switch_regulator_driver);
-}
-
-subsys_initcall_sync(gpio_switch_regulator_init);
-module_exit(gpio_switch_regulator_exit);