samsung update 1

1 files changed, 569 insertions, 0 deletions

diff --git a/drivers/regulator/max8698.c b/drivers/regulator/max8698.c
new file mode 100644
index 0000000..c9ff813
--- /dev/null
+++ b/drivers/regulator/max8698.c
@@ -0,0 +1,569 @@
+/*
+ * max8698.c - Voltage regulator driver for the Maxim 8698
+ *
+ *  Copyright (C) 2009-2010 Samsung Electronics
+ *  Kyungmin Park <kyungmin.park@samsung.com>
+ *  Marek Szyprowski <m.szyprowski@samsung.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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/mfd/max8698.h>
+#include <linux/mfd/max8698-private.h>
+
+struct max8698_data {
+	struct device		*dev;
+	struct max8698_dev	*iodev;
+	int			num_regulators;
+	struct regulator_dev	**rdev;
+};
+
+struct voltage_map_desc {
+	int min;
+	int max;
+	int step;
+};
+
+#define RAMP_DELAY_VAL	10
+
+/* Voltage maps */
+static const struct voltage_map_desc ldo23_voltage_map_desc = {
+	.min	= 800,
+	.step	= 50,
+	.max	= 1300,
+};
+static const struct voltage_map_desc ldo45679_voltage_map_desc = {
+	.min	= 1600,
+	.step	= 100,
+	.max	= 3600,
+};
+static const struct voltage_map_desc ldo8_voltage_map_desc = {
+	.min	= 3000,
+	.step	= 100,
+	.max	= 3600,
+};
+static const struct voltage_map_desc buck12_voltage_map_desc = {
+	.min	= 750,
+	.step	= 50,
+	.max	= 1500,
+};
+
+static const struct voltage_map_desc *ldo_voltage_map[] = {
+	NULL,
+	&ldo23_voltage_map_desc,	/* LDO1 */
+	&ldo23_voltage_map_desc,	/* LDO2 */
+	&ldo23_voltage_map_desc,	/* LDO3 */
+	&ldo45679_voltage_map_desc,	/* LDO4 */
+	&ldo45679_voltage_map_desc,	/* LDO5 */
+	&ldo45679_voltage_map_desc,	/* LDO6 */
+	&ldo45679_voltage_map_desc,	/* LDO7 */
+	&ldo8_voltage_map_desc,		/* LDO8 */
+	&ldo45679_voltage_map_desc,	/* LDO9 */
+	&buck12_voltage_map_desc,	/* BUCK1 */
+	&buck12_voltage_map_desc,	/* BUCK2 */
+	&ldo45679_voltage_map_desc,	/* BUCK3 */
+};
+
+static inline int max8698_get_ldo(struct regulator_dev *rdev)
+{
+	return rdev_get_id(rdev);
+}
+
+static int max8698_list_voltage(struct regulator_dev *rdev,
+		unsigned int selector)
+{
+	const struct voltage_map_desc *desc;
+	int ldo = max8698_get_ldo(rdev);
+	int val;
+
+	if (ldo >= ARRAY_SIZE(ldo_voltage_map))
+		return -EINVAL;
+
+	desc = ldo_voltage_map[ldo];
+	if (desc == NULL)
+		return -EINVAL;
+
+	val = desc->min + desc->step * selector;
+	if (val > desc->max)
+		return -EINVAL;
+
+	return val * 1000;
+}
+
+static int max8698_get_enable_register(struct regulator_dev *rdev,
+		int *reg, int *shift)
+{
+	int ldo = max8698_get_ldo(rdev);
+
+	switch (ldo) {
+	case MAX8698_LDO2 ... MAX8698_LDO5:
+		*reg = MAX8698_REG_ONOFF1;
+		*shift = 4 - (ldo - MAX8698_LDO2);
+		break;
+	case MAX8698_LDO6 ... MAX8698_LDO9:
+		*reg = MAX8698_REG_ONOFF2;
+		*shift = 7 - (ldo - MAX8698_LDO6);
+		break;
+	case MAX8698_BUCK1 ... MAX8698_BUCK3:
+		*reg = MAX8698_REG_ONOFF1;
+		*shift = 7 - (ldo - MAX8698_BUCK1);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int max8698_ldo_is_enabled(struct regulator_dev *rdev)
+{
+	struct max8698_data *max8698 = rdev_get_drvdata(rdev);
+	int ret, reg, shift = 8;
+	u8 val;
+
+	ret = max8698_get_enable_register(rdev, &reg, &shift);
+	if (ret)
+		return ret;
+
+	ret = max8698_read_reg(max8698->iodev, reg, &val);
+	if (ret)
+		return ret;
+
+	return val & (1 << shift);
+}
+
+static int max8698_ldo_enable(struct regulator_dev *rdev)
+{
+	struct max8698_data *max8698 = rdev_get_drvdata(rdev);
+	int reg, shift = 8, ret;
+
+	ret = max8698_get_enable_register(rdev, &reg, &shift);
+	if (ret)
+		return ret;
+
+	return max8698_update_reg(max8698->iodev, reg, 1<<shift, 1<<shift);
+}
+
+static int max8698_ldo_disable(struct regulator_dev *rdev)
+{
+	struct max8698_data *max8698 = rdev_get_drvdata(rdev);
+	int reg, shift = 8, ret;
+
+	ret = max8698_get_enable_register(rdev, &reg, &shift);
+	if (ret)
+		return ret;
+
+	return max8698_update_reg(max8698->iodev, reg, 0, 1<<shift);
+}
+
+static int max8698_get_voltage_register(struct regulator_dev *rdev,
+		int *_reg, int *_shift, int *_mask)
+{
+	struct max8698_data *max8698 = rdev_get_drvdata(rdev);
+	struct max8698_platform_data *pdata = dev_get_platdata(max8698->iodev->dev);
+	int ldo = max8698_get_ldo(rdev);
+	int reg, shift = 0, mask = 0xff;
+
+	switch (ldo) {
+	case MAX8698_LDO2 ... MAX8698_LDO3:
+		reg = MAX8698_REG_LDO2_LDO3;
+		mask = 0xf;
+		if (ldo == MAX8698_LDO2)
+			shift = 4;
+		else
+			shift = 0;
+		break;
+	case MAX8698_LDO4 ... MAX8698_LDO7:
+		reg = MAX8698_REG_LDO4 + (ldo - MAX8698_LDO4);
+		break;
+	case MAX8698_LDO8:
+		reg = MAX8698_REG_LDO8_BKCHAR;
+		mask = 0xf;
+		shift = 4;
+		break;
+	case MAX8698_LDO9:
+		reg = MAX8698_REG_LDO9;
+		break;
+	case MAX8698_BUCK1:
+		mask = 0xf;
+		if (gpio_get_value(pdata->set2) == 0)
+			reg = MAX8698_REG_DVSARM12;
+		else
+			reg = MAX8698_REG_DVSARM34;
+
+		if (gpio_get_value(pdata->set1) == 0)
+			shift = 0;
+		else
+			shift = 4;
+		break;
+	case MAX8698_BUCK2:
+		if (gpio_get_value(pdata->set3) == 0)
+			shift = 0;
+		else
+			shift = 4;
+		reg = MAX8698_REG_DVSINT12;
+		mask = 0xf;
+		break;
+	case MAX8698_BUCK3:
+		reg = MAX8698_REG_BUCK3;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	*_reg = reg;
+	*_shift = shift;
+	*_mask = mask;
+
+	return 0;
+}
+
+static int max8698_get_voltage(struct regulator_dev *rdev)
+{
+	struct max8698_data *max8698 = rdev_get_drvdata(rdev);
+	int reg, shift = 0, mask, ret;
+	u8 val;
+
+	ret = max8698_get_voltage_register(rdev, &reg, &shift, &mask);
+	if (ret)
+		return ret;
+
+	ret = max8698_read_reg(max8698->iodev, reg, &val);
+	if (ret)
+		return ret;
+
+	val >>= shift;
+	val &= mask;
+
+	return max8698_list_voltage(rdev, val);
+}
+
+static int max8698_set_voltage(struct regulator_dev *rdev,
+		int min_uV, int max_uV, unsigned *selector)
+{
+	struct max8698_data *max8698 = rdev_get_drvdata(rdev);
+	struct max8698_platform_data *pdata = dev_get_platdata(max8698->iodev->dev);
+	int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
+	const struct voltage_map_desc *desc;
+	int ldo = max8698_get_ldo(rdev);
+	int reg, shift = 0, mask, ret = 0;
+	int i = 0;
+	int previous_vol = 0;
+
+	if (ldo >= ARRAY_SIZE(ldo_voltage_map))
+		return -EINVAL;
+
+	desc = ldo_voltage_map[ldo];
+	if (desc == NULL)
+		return -EINVAL;
+
+	/* For Buck1/2 */
+	if (ldo == MAX8698_BUCK1)   {
+		if (min_vol == (desc->min + desc->step * pdata->dvsarm2)) {
+			gpio_set_value(pdata->set2, 0);
+			gpio_set_value(pdata->set1, 1);
+		} else if (min_vol == (desc->min + desc->step * pdata->dvsarm3)) {
+			gpio_set_value(pdata->set2, 1);
+			gpio_set_value(pdata->set1, 0);
+		} else if (min_vol == (desc->min + desc->step * pdata->dvsarm4)) {
+			gpio_set_value(pdata->set2, 1);
+			gpio_set_value(pdata->set1, 1);
+		} else {
+			gpio_set_value(pdata->set2, 0);
+			gpio_set_value(pdata->set1, 0);
+		}
+
+		goto ramp_delay;
+	}
+
+	if (ldo == MAX8698_BUCK2) {
+		if (min_vol == (desc->min + desc->step * pdata->dvsint2))
+			gpio_set_value(pdata->set3, 1);
+		else
+			gpio_set_value(pdata->set3, 0);
+
+		goto ramp_delay;
+	}
+
+	if (max_vol < desc->min || min_vol > desc->max)
+		return -EINVAL;
+
+	while (desc->min + desc->step*i < min_vol &&
+			desc->min + desc->step*i < desc->max)
+		i++;
+
+	if (desc->min + desc->step*i > max_vol)
+		return -EINVAL;
+
+	*selector = i;
+
+	ret = max8698_get_voltage_register(rdev, &reg, &shift, &mask);
+	if (ret)
+		return ret;
+
+	ret = max8698_update_reg(max8698->iodev, reg, i<<shift, mask<<shift);
+
+ramp_delay:
+	/* wait for RAMP_UP_DELAY if rdev is BUCK1/2 */
+	if (ldo == MAX8698_BUCK1 || MAX8698_BUCK2) {
+		int difference = desc->min + desc->step*i - previous_vol/1000;
+		if (difference > 0)
+			udelay(difference / RAMP_DELAY_VAL);
+	}
+
+	return ret;
+}
+
+static struct regulator_ops max8698_ldo_ops = {
+	.list_voltage		= max8698_list_voltage,
+	.is_enabled		= max8698_ldo_is_enabled,
+	.enable			= max8698_ldo_enable,
+	.disable		= max8698_ldo_disable,
+	.get_voltage		= max8698_get_voltage,
+	.set_voltage		= max8698_set_voltage,
+	.set_suspend_enable	= max8698_ldo_enable,
+	.set_suspend_disable	= max8698_ldo_disable,
+};
+
+static struct regulator_ops max8698_buck_ops = {
+	.list_voltage		= max8698_list_voltage,
+	.is_enabled		= max8698_ldo_is_enabled,
+	.enable			= max8698_ldo_enable,
+	.disable		= max8698_ldo_disable,
+	.get_voltage		= max8698_get_voltage,
+	.set_voltage		= max8698_set_voltage,
+	.set_suspend_enable	= max8698_ldo_enable,
+	.set_suspend_disable	= max8698_ldo_disable,
+};
+
+static struct regulator_desc regulators[] = {
+	{
+		.name	= "LDO1",
+		.id	= MAX8698_LDO1,
+		.ops	= &max8698_ldo_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "LDO2",
+		.id	= MAX8698_LDO2,
+		.ops	= &max8698_ldo_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "LDO3",
+		.id	= MAX8698_LDO3,
+		.ops	= &max8698_ldo_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "LDO4",
+		.id	= MAX8698_LDO4,
+		.ops	= &max8698_ldo_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "LDO5",
+		.id	= MAX8698_LDO5,
+		.ops	= &max8698_ldo_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "LDO6",
+		.id	= MAX8698_LDO6,
+		.ops	= &max8698_ldo_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "LDO7",
+		.id	= MAX8698_LDO7,
+		.ops	= &max8698_ldo_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "LDO8",
+		.id	= MAX8698_LDO8,
+		.ops	= &max8698_ldo_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "LDO9",
+		.id	= MAX8698_LDO9,
+		.ops	= &max8698_ldo_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "BUCK1",
+		.id	= MAX8698_BUCK1,
+		.ops	= &max8698_buck_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "BUCK2",
+		.id	= MAX8698_BUCK2,
+		.ops	= &max8698_buck_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}, {
+		.name	= "BUCK3",
+		.id	= MAX8698_BUCK3,
+		.ops	= &max8698_buck_ops,
+		.type	= REGULATOR_VOLTAGE,
+		.owner	= THIS_MODULE,
+	}
+};
+
+static __devinit int max8698_pmic_probe(struct platform_device *pdev)
+{
+	struct max8698_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+	struct max8698_platform_data *pdata = dev_get_platdata(iodev->dev);
+	struct regulator_dev **rdev;
+	struct max8698_data *max8698;
+	int i, ret, size;
+
+	if (!pdata) {
+		dev_err(pdev->dev.parent, "No platform init data supplied\n");
+		return -ENODEV;
+	}
+
+	max8698 = kzalloc(sizeof(struct max8698_data), GFP_KERNEL);
+	if (!max8698)
+		return -ENOMEM;
+
+	size = sizeof(struct regulator_dev *) * (pdata->num_regulators + 1);
+	max8698->rdev = kzalloc(size, GFP_KERNEL);
+	if (!max8698->rdev) {
+		kfree(max8698);
+		return -ENOMEM;
+	}
+
+	rdev = max8698->rdev;
+	max8698->iodev = iodev;
+	platform_set_drvdata(pdev, max8698);
+
+	for (i = 0; i < pdata->num_regulators; i++) {
+		const struct voltage_map_desc *desc;
+		int count;
+		int id = pdata->regulators[i].id;
+		int index = id - MAX8698_LDO1;
+
+		desc = ldo_voltage_map[id];
+		count = (desc->max - desc->min) / desc->step + 1;
+		regulators[index].n_voltages = count;
+
+		rdev[i] = regulator_register(&regulators[index], max8698->dev,
+				pdata->regulators[i].initdata, max8698);
+		if (IS_ERR(rdev[i])) {
+			ret = PTR_ERR(rdev[i]);
+			dev_err(max8698->dev, "regulator init failed\n");
+			rdev[i] = NULL;
+			goto err;
+		}
+	}
+
+	if (pdata->dvsarm1 && pdata->dvsarm2 && pdata->dvsarm3 &&
+			pdata->dvsarm4 && gpio_is_valid(pdata->set1) &&
+			gpio_is_valid(pdata->set2)) {
+		max8698_write_reg(iodev, MAX8698_REG_DVSARM12,
+				pdata->dvsarm1 | (pdata->dvsarm2 << 4));
+		max8698_write_reg(iodev, MAX8698_REG_DVSARM34,
+				pdata->dvsarm3 | (pdata->dvsarm4 << 4));
+
+		ret = gpio_request(pdata->set1, "MAX8698 SET1");
+		if (ret)
+			goto err;
+		gpio_direction_output(pdata->set1, 0);
+		ret = gpio_request(pdata->set2, "MAX8698 SET2");
+		if (ret)
+			goto out_set2;
+		gpio_direction_output(pdata->set2, 0);
+	}
+
+	if (pdata->dvsint1 && pdata->dvsint2 && gpio_is_valid(pdata->set3)) {
+		max8698_write_reg(iodev, MAX8698_REG_DVSINT12,
+				pdata->dvsint1 | (pdata->dvsint2 << 4));
+
+		ret = gpio_request(pdata->set3, "MAX8698 SET3");
+		if (ret)
+			goto out_set3;
+		gpio_direction_output(pdata->set3, 0);
+	}
+
+	return 0;
+
+out_set3:
+	gpio_free(S5PV210_GPH1(7));
+
+out_set2:
+	gpio_free(S5PV210_GPH1(6));
+err:
+	for (i = 0; i <= max8698->num_regulators; i++)
+		if (rdev[i])
+			regulator_unregister(rdev[i]);
+
+	kfree(max8698->rdev);
+	kfree(max8698);
+
+	return ret;
+}
+
+static int __devexit max8698_pmic_remove(struct platform_device *pdev)
+{
+	struct max8698_data *max8698 = platform_get_drvdata(pdev);
+	struct regulator_dev **rdev = max8698->rdev;
+	int i;
+
+	for (i = 0; i <= max8698->num_regulators; i++)
+		if (rdev[i])
+			regulator_unregister(rdev[i]);
+
+	kfree(max8698->rdev);
+	kfree(max8698);
+
+	return 0;
+}
+
+static struct platform_driver max8698_pmic_driver = {
+	.driver = {
+		.name = "max8698-pmic",
+		.owner = THIS_MODULE,
+	},
+	.probe = max8698_pmic_probe,
+	.remove = __devexit_p(max8698_pmic_remove),
+};
+
+static int __init max8698_pmic_init(void)
+{
+	return platform_driver_register(&max8698_pmic_driver);
+}
+subsys_initcall(max8698_pmic_init);
+
+static void __exit max8698_pmic_cleanup(void)
+{
+	platform_driver_unregister(&max8698_pmic_driver);
+}
+module_exit(max8698_pmic_cleanup);
+
+MODULE_DESCRIPTION("MAXIM 8698 voltage regulator driver");