Initial import

1 files changed, 439 insertions, 0 deletions

diff --git a/drivers/regulator/rk808-regulator.c b/drivers/regulator/rk808-regulator.c
new file mode 100644
index 000000000..3fd44353c
--- /dev/null
+++ b/drivers/regulator/rk808-regulator.c
@@ -0,0 +1,439 @@
+/*
+ * Regulator driver for Rockchip RK808
+ *
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * Author: Chris Zhong <zyw@rock-chips.com>
+ * Author: Zhang Qing <zhangqing@rock-chips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/mfd/rk808.h>
+#include <linux/of_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+/* Field Definitions */
+#define RK808_BUCK_VSEL_MASK	0x3f
+#define RK808_BUCK4_VSEL_MASK	0xf
+#define RK808_LDO_VSEL_MASK	0x1f
+
+/* Ramp rate definitions for buck1 / buck2 only */
+#define RK808_RAMP_RATE_OFFSET		3
+#define RK808_RAMP_RATE_MASK		(3 << RK808_RAMP_RATE_OFFSET)
+#define RK808_RAMP_RATE_2MV_PER_US	(0 << RK808_RAMP_RATE_OFFSET)
+#define RK808_RAMP_RATE_4MV_PER_US	(1 << RK808_RAMP_RATE_OFFSET)
+#define RK808_RAMP_RATE_6MV_PER_US	(2 << RK808_RAMP_RATE_OFFSET)
+#define RK808_RAMP_RATE_10MV_PER_US	(3 << RK808_RAMP_RATE_OFFSET)
+
+/* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */
+#define RK808_SLP_REG_OFFSET 1
+
+/* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */
+#define RK808_SLP_SET_OFF_REG_OFFSET 2
+
+static const int rk808_buck_config_regs[] = {
+	RK808_BUCK1_CONFIG_REG,
+	RK808_BUCK2_CONFIG_REG,
+	RK808_BUCK3_CONFIG_REG,
+	RK808_BUCK4_CONFIG_REG,
+};
+
+static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
+	REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500),
+};
+
+static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
+};
+
+static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
+};
+
+static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
+	REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
+	REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
+};
+
+static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = {
+	REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
+};
+
+static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
+{
+	unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
+	unsigned int reg = rk808_buck_config_regs[rdev->desc->id -
+						  RK808_ID_DCDC1];
+
+	switch (ramp_delay) {
+	case 1 ... 2000:
+		ramp_value = RK808_RAMP_RATE_2MV_PER_US;
+		break;
+	case 2001 ... 4000:
+		ramp_value = RK808_RAMP_RATE_4MV_PER_US;
+		break;
+	case 4001 ... 6000:
+		ramp_value = RK808_RAMP_RATE_6MV_PER_US;
+		break;
+	case 6001 ... 10000:
+		break;
+	default:
+		pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
+			rdev->desc->name, ramp_delay);
+	}
+
+	return regmap_update_bits(rdev->regmap, reg,
+				  RK808_RAMP_RATE_MASK, ramp_value);
+}
+
+static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
+{
+	unsigned int reg;
+	int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
+
+	if (sel < 0)
+		return -EINVAL;
+
+	reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
+
+	return regmap_update_bits(rdev->regmap, reg,
+				  rdev->desc->vsel_mask,
+				  sel);
+}
+
+static int rk808_set_suspend_enable(struct regulator_dev *rdev)
+{
+	unsigned int reg;
+
+	reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
+
+	return regmap_update_bits(rdev->regmap, reg,
+				  rdev->desc->enable_mask,
+				  0);
+}
+
+static int rk808_set_suspend_disable(struct regulator_dev *rdev)
+{
+	unsigned int reg;
+
+	reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
+
+	return regmap_update_bits(rdev->regmap, reg,
+				  rdev->desc->enable_mask,
+				  rdev->desc->enable_mask);
+}
+
+static struct regulator_ops rk808_buck1_2_ops = {
+	.list_voltage		= regulator_list_voltage_linear_range,
+	.map_voltage		= regulator_map_voltage_linear_range,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.is_enabled		= regulator_is_enabled_regmap,
+	.set_ramp_delay		= rk808_set_ramp_delay,
+	.set_suspend_voltage	= rk808_set_suspend_voltage,
+	.set_suspend_enable	= rk808_set_suspend_enable,
+	.set_suspend_disable	= rk808_set_suspend_disable,
+};
+
+static struct regulator_ops rk808_reg_ops = {
+	.list_voltage		= regulator_list_voltage_linear_range,
+	.map_voltage		= regulator_map_voltage_linear_range,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.is_enabled		= regulator_is_enabled_regmap,
+	.set_suspend_voltage	= rk808_set_suspend_voltage,
+	.set_suspend_enable	= rk808_set_suspend_enable,
+	.set_suspend_disable	= rk808_set_suspend_disable,
+};
+
+static struct regulator_ops rk808_switch_ops = {
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.is_enabled		= regulator_is_enabled_regmap,
+	.set_suspend_enable	= rk808_set_suspend_enable,
+	.set_suspend_disable	= rk808_set_suspend_disable,
+};
+
+static const struct regulator_desc rk808_reg[] = {
+	{
+		.name = "DCDC_REG1",
+		.supply_name = "vcc1",
+		.id = RK808_ID_DCDC1,
+		.ops = &rk808_buck1_2_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 64,
+		.linear_ranges = rk808_buck_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
+		.vsel_reg = RK808_BUCK1_ON_VSEL_REG,
+		.vsel_mask = RK808_BUCK_VSEL_MASK,
+		.enable_reg = RK808_DCDC_EN_REG,
+		.enable_mask = BIT(0),
+		.owner = THIS_MODULE,
+	}, {
+		.name = "DCDC_REG2",
+		.supply_name = "vcc2",
+		.id = RK808_ID_DCDC2,
+		.ops = &rk808_buck1_2_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 64,
+		.linear_ranges = rk808_buck_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
+		.vsel_reg = RK808_BUCK2_ON_VSEL_REG,
+		.vsel_mask = RK808_BUCK_VSEL_MASK,
+		.enable_reg = RK808_DCDC_EN_REG,
+		.enable_mask = BIT(1),
+		.owner = THIS_MODULE,
+	}, {
+		.name = "DCDC_REG3",
+		.supply_name = "vcc3",
+		.id = RK808_ID_DCDC3,
+		.ops = &rk808_switch_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 1,
+		.enable_reg = RK808_DCDC_EN_REG,
+		.enable_mask = BIT(2),
+		.owner = THIS_MODULE,
+	}, {
+		.name = "DCDC_REG4",
+		.supply_name = "vcc4",
+		.id = RK808_ID_DCDC4,
+		.ops = &rk808_reg_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 16,
+		.linear_ranges = rk808_buck4_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
+		.vsel_reg = RK808_BUCK4_ON_VSEL_REG,
+		.vsel_mask = RK808_BUCK4_VSEL_MASK,
+		.enable_reg = RK808_DCDC_EN_REG,
+		.enable_mask = BIT(3),
+		.owner = THIS_MODULE,
+	}, {
+		.name = "LDO_REG1",
+		.supply_name = "vcc6",
+		.id = RK808_ID_LDO1,
+		.ops = &rk808_reg_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 17,
+		.linear_ranges = rk808_ldo_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
+		.vsel_reg = RK808_LDO1_ON_VSEL_REG,
+		.vsel_mask = RK808_LDO_VSEL_MASK,
+		.enable_reg = RK808_LDO_EN_REG,
+		.enable_mask = BIT(0),
+		.enable_time = 400,
+		.owner = THIS_MODULE,
+	}, {
+		.name = "LDO_REG2",
+		.supply_name = "vcc6",
+		.id = RK808_ID_LDO2,
+		.ops = &rk808_reg_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 17,
+		.linear_ranges = rk808_ldo_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
+		.vsel_reg = RK808_LDO2_ON_VSEL_REG,
+		.vsel_mask = RK808_LDO_VSEL_MASK,
+		.enable_reg = RK808_LDO_EN_REG,
+		.enable_mask = BIT(1),
+		.enable_time = 400,
+		.owner = THIS_MODULE,
+	}, {
+		.name = "LDO_REG3",
+		.supply_name = "vcc7",
+		.id = RK808_ID_LDO3,
+		.ops = &rk808_reg_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 16,
+		.linear_ranges = rk808_ldo3_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
+		.vsel_reg = RK808_LDO3_ON_VSEL_REG,
+		.vsel_mask = RK808_BUCK4_VSEL_MASK,
+		.enable_reg = RK808_LDO_EN_REG,
+		.enable_mask = BIT(2),
+		.enable_time = 400,
+		.owner = THIS_MODULE,
+	}, {
+		.name = "LDO_REG4",
+		.supply_name = "vcc9",
+		.id = RK808_ID_LDO4,
+		.ops = &rk808_reg_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 17,
+		.linear_ranges = rk808_ldo_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
+		.vsel_reg = RK808_LDO4_ON_VSEL_REG,
+		.vsel_mask = RK808_LDO_VSEL_MASK,
+		.enable_reg = RK808_LDO_EN_REG,
+		.enable_mask = BIT(3),
+		.enable_time = 400,
+		.owner = THIS_MODULE,
+	}, {
+		.name = "LDO_REG5",
+		.supply_name = "vcc9",
+		.id = RK808_ID_LDO5,
+		.ops = &rk808_reg_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 17,
+		.linear_ranges = rk808_ldo_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
+		.vsel_reg = RK808_LDO5_ON_VSEL_REG,
+		.vsel_mask = RK808_LDO_VSEL_MASK,
+		.enable_reg = RK808_LDO_EN_REG,
+		.enable_mask = BIT(4),
+		.enable_time = 400,
+		.owner = THIS_MODULE,
+	}, {
+		.name = "LDO_REG6",
+		.supply_name = "vcc10",
+		.id = RK808_ID_LDO6,
+		.ops = &rk808_reg_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 18,
+		.linear_ranges = rk808_ldo6_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
+		.vsel_reg = RK808_LDO6_ON_VSEL_REG,
+		.vsel_mask = RK808_LDO_VSEL_MASK,
+		.enable_reg = RK808_LDO_EN_REG,
+		.enable_mask = BIT(5),
+		.enable_time = 400,
+		.owner = THIS_MODULE,
+	}, {
+		.name = "LDO_REG7",
+		.supply_name = "vcc7",
+		.id = RK808_ID_LDO7,
+		.ops = &rk808_reg_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 18,
+		.linear_ranges = rk808_ldo6_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
+		.vsel_reg = RK808_LDO7_ON_VSEL_REG,
+		.vsel_mask = RK808_LDO_VSEL_MASK,
+		.enable_reg = RK808_LDO_EN_REG,
+		.enable_mask = BIT(6),
+		.enable_time = 400,
+		.owner = THIS_MODULE,
+	}, {
+		.name = "LDO_REG8",
+		.supply_name = "vcc11",
+		.id = RK808_ID_LDO8,
+		.ops = &rk808_reg_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 17,
+		.linear_ranges = rk808_ldo_voltage_ranges,
+		.n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
+		.vsel_reg = RK808_LDO8_ON_VSEL_REG,
+		.vsel_mask = RK808_LDO_VSEL_MASK,
+		.enable_reg = RK808_LDO_EN_REG,
+		.enable_mask = BIT(7),
+		.enable_time = 400,
+		.owner = THIS_MODULE,
+	}, {
+		.name = "SWITCH_REG1",
+		.supply_name = "vcc8",
+		.id = RK808_ID_SWITCH1,
+		.ops = &rk808_switch_ops,
+		.type = REGULATOR_VOLTAGE,
+		.enable_reg = RK808_DCDC_EN_REG,
+		.enable_mask = BIT(5),
+		.owner = THIS_MODULE,
+	}, {
+		.name = "SWITCH_REG2",
+		.supply_name = "vcc12",
+		.id = RK808_ID_SWITCH2,
+		.ops = &rk808_switch_ops,
+		.type = REGULATOR_VOLTAGE,
+		.enable_reg = RK808_DCDC_EN_REG,
+		.enable_mask = BIT(6),
+		.owner = THIS_MODULE,
+	},
+};
+
+static struct of_regulator_match rk808_reg_matches[] = {
+	[RK808_ID_DCDC1]	= { .name = "DCDC_REG1" },
+	[RK808_ID_DCDC2]	= { .name = "DCDC_REG2" },
+	[RK808_ID_DCDC3]	= { .name = "DCDC_REG3" },
+	[RK808_ID_DCDC4]	= { .name = "DCDC_REG4" },
+	[RK808_ID_LDO1]		= { .name = "LDO_REG1" },
+	[RK808_ID_LDO2]		= { .name = "LDO_REG2" },
+	[RK808_ID_LDO3]		= { .name = "LDO_REG3" },
+	[RK808_ID_LDO4]		= { .name = "LDO_REG4" },
+	[RK808_ID_LDO5]		= { .name = "LDO_REG5" },
+	[RK808_ID_LDO6]		= { .name = "LDO_REG6" },
+	[RK808_ID_LDO7]		= { .name = "LDO_REG7" },
+	[RK808_ID_LDO8]		= { .name = "LDO_REG8" },
+	[RK808_ID_SWITCH1]	= { .name = "SWITCH_REG1" },
+	[RK808_ID_SWITCH2]	= { .name = "SWITCH_REG2" },
+};
+
+static int rk808_regulator_probe(struct platform_device *pdev)
+{
+	struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
+	struct i2c_client *client = rk808->i2c;
+	struct device_node *reg_np;
+	struct regulator_config config = {};
+	struct regulator_dev *rk808_rdev;
+	int ret, i;
+
+	reg_np = of_get_child_by_name(client->dev.of_node, "regulators");
+	if (!reg_np)
+		return -ENXIO;
+
+	ret = of_regulator_match(&pdev->dev, reg_np, rk808_reg_matches,
+				 RK808_NUM_REGULATORS);
+	of_node_put(reg_np);
+	if (ret < 0)
+		return ret;
+
+	/* Instantiate the regulators */
+	for (i = 0; i < RK808_NUM_REGULATORS; i++) {
+		if (!rk808_reg_matches[i].init_data ||
+		    !rk808_reg_matches[i].of_node)
+			continue;
+
+		config.dev = &client->dev;
+		config.driver_data = rk808;
+		config.regmap = rk808->regmap;
+		config.of_node = rk808_reg_matches[i].of_node;
+		config.init_data = rk808_reg_matches[i].init_data;
+
+		rk808_rdev = devm_regulator_register(&pdev->dev,
+						     &rk808_reg[i], &config);
+		if (IS_ERR(rk808_rdev)) {
+			dev_err(&client->dev,
+				"failed to register %d regulator\n", i);
+			return PTR_ERR(rk808_rdev);
+		}
+	}
+
+	return 0;
+}
+
+static struct platform_driver rk808_regulator_driver = {
+	.probe = rk808_regulator_probe,
+	.driver = {
+		.name = "rk808-regulator",
+	},
+};
+
+module_platform_driver(rk808_regulator_driver);
+
+MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
+MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
+MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:rk808-regulator");