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Subject[PATCH 3/4] RK808: Add rk808 regulator driver
Date
The regulator module consists of 4 DCDCs, 8 LDOs and 2 switches.
The output voltages are configurable and are meant to supply power
to the main processor and other components

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
---
drivers/regulator/Kconfig | 10 +
drivers/regulator/Makefile | 1 +
drivers/regulator/rk808-regulator.c | 420 +++++++++++++++++++++++++++++++++++
3 files changed, 431 insertions(+)
create mode 100644 drivers/regulator/rk808-regulator.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 2dc8289..fb32bab 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -459,6 +459,16 @@ config REGULATOR_RC5T583
through regulator interface. The device supports multiple DCDC/LDO
outputs which can be controlled by i2c communication.

+config REGULATOR_RK808
+ tristate "Rockchip RK808 Power regulators"
+ depends on MFD_RK808
+ help
+ Select this option to enable the power regulator of ROCKCHIP
+ PMIC RK808.
+ This driver supports the control of different power rails of device
+ through regulator interface. The device supports multiple DCDC/LDO
+ outputs which can be controlled by i2c communication.
+
config REGULATOR_S2MPA01
tristate "Samsung S2MPA01 voltage regulator"
depends on MFD_SEC_CORE
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index aa4a6aa..236fdbb 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -62,6 +62,7 @@ obj-$(CONFIG_REGULATOR_PBIAS) += pbias-regulator.o
obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
obj-$(CONFIG_REGULATOR_RC5T583) += rc5t583-regulator.o
+obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o
obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
diff --git a/drivers/regulator/rk808-regulator.c b/drivers/regulator/rk808-regulator.c
new file mode 100644
index 0000000..e916850
--- /dev/null
+++ b/drivers/regulator/rk808-regulator.c
@@ -0,0 +1,420 @@
+/*
+ * 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/init.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/rk808.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+/*
+ * Field Definitions.
+ */
+#define RK808_BUCK_VSEL_MASK 0x3f
+#define RK808_BUCK4_VSEL_MASK 0xf
+#define RK808_LDO_VSEL_MASK 0x1f
+
+static const int buck_set_vol_base_addr[] = {
+ RK808_BUCK1_ON_VSEL_REG,
+ RK808_BUCK2_ON_VSEL_REG,
+ RK808_BUCK3_CONFIG_REG,
+ RK808_BUCK4_ON_VSEL_REG,
+};
+
+static const int buck_contr_base_addr[] = {
+ RK808_BUCK1_CONFIG_REG,
+ RK808_BUCK2_CONFIG_REG,
+ RK808_BUCK3_CONFIG_REG,
+ RK808_BUCK4_CONFIG_REG,
+};
+
+#define rk808_BUCK_SET_VOL_REG(x) (buck_set_vol_base_addr[x])
+#define rk808_BUCK_CONTR_REG(x) (buck_contr_base_addr[x])
+#define rk808_LDO_SET_VOL_REG(x) (ldo_set_vol_base_addr[x])
+
+static const int ldo_set_vol_base_addr[] = {
+ RK808_LDO1_ON_VSEL_REG,
+ RK808_LDO2_ON_VSEL_REG,
+ RK808_LDO3_ON_VSEL_REG,
+ RK808_LDO4_ON_VSEL_REG,
+ RK808_LDO5_ON_VSEL_REG,
+ RK808_LDO6_ON_VSEL_REG,
+ RK808_LDO7_ON_VSEL_REG,
+ RK808_LDO8_ON_VSEL_REG,
+};
+
+/*
+ * rk808 voltage number
+ */
+static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
+ REGULATOR_LINEAR_RANGE(700000, 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 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,
+};
+
+static struct regulator_ops rk808_switch_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+};
+
+static const struct regulator_desc rk808_reg[] = {
+ {
+ .name = "DCDC_REG1",
+ .id = RK808_ID_DCDC1,
+ .ops = &rk808_reg_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",
+ .id = RK808_ID_DCDC2,
+ .ops = &rk808_reg_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",
+ .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",
+ .id = RK808_ID_DCDC4,
+ .ops = &rk808_reg_ops,
+ .type = REGULATOR_VOLTAGE,
+ .n_voltages = 17,
+ .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",
+ .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),
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO_REG2",
+ .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),
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO_REG3",
+ .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),
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO_REG4",
+ .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),
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO_REG5",
+ .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),
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO_REG6",
+ .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),
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO_REG7",
+ .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),
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO_REG8",
+ .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),
+ .owner = THIS_MODULE,
+ }, {
+ .name = "SWITCH_REG1",
+ .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",
+ .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_dts(struct rk808 *rk808)
+{
+ struct rk808_board *pdata = rk808->pdata;
+ struct device_node *np, *reg_np;
+ int i, count;
+
+ np = rk808->dev->of_node;
+ if (!np) {
+ dev_err(rk808->dev, "could not find pmic sub-node\n");
+ return -ENXIO;
+ }
+
+ reg_np = of_find_node_by_name(np, "regulators");
+ if (!reg_np)
+ return -ENXIO;
+
+ count = of_regulator_match(rk808->dev, reg_np, rk808_reg_matches,
+ rk808_NUM_REGULATORS);
+ of_node_put(reg_np);
+
+ if (count < 0) {
+ dev_err(rk808->dev,
+ "failed to parse regulator data: %d\n", count);
+ return count;
+ }
+
+ if (count > rk808_NUM_REGULATORS) {
+ dev_err(rk808->dev, "Too many regulators defined (%d, max %d)\n",
+ count, rk808_NUM_REGULATORS);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < count; i++) {
+ if (!rk808_reg_matches[i].init_data ||
+ !rk808_reg_matches[i].of_node)
+ continue;
+
+ pdata->rk808_init_data[i] = rk808_reg_matches[i].init_data;
+ pdata->of_node[i] = rk808_reg_matches[i].of_node;
+ }
+
+ return 0;
+}
+
+static int rk808_regulator_probe(struct platform_device *pdev)
+{
+ struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
+ struct rk808_board *pdata;
+ struct regulator_config config;
+ struct regulator_dev *rk808_rdev;
+ struct regulator_init_data *reg_data;
+ const char *rail_name;
+ int i = 0;
+ int ret = 0;
+
+ dev_dbg(rk808->dev, "%s\n", __func__);
+
+ if (!rk808) {
+ dev_err(rk808->dev, "%s no rk808\n", __func__);
+ return -ENODEV;
+ }
+
+ pdata = rk808->pdata;
+ if (!pdata) {
+ dev_err(rk808->dev, "%s no pdata\n", __func__);
+ return -ENODEV;
+ }
+
+ ret = rk808_regulator_dts(rk808);
+ if (ret)
+ return ret;
+
+ rk808->num_regulators = rk808_NUM_REGULATORS;
+ rk808->rdev = kcalloc(rk808_NUM_REGULATORS,
+ sizeof(struct regulator_dev *), GFP_KERNEL);
+ if (!rk808->rdev)
+ return -ENOMEM;
+
+ /* Instantiate the regulators */
+ for (i = 0; i < rk808_NUM_REGULATORS; i++) {
+ reg_data = pdata->rk808_init_data[i];
+ if (!reg_data)
+ continue;
+
+ config.dev = rk808->dev;
+ config.driver_data = rk808;
+ config.regmap = rk808->regmap;
+
+ if (rk808->dev->of_node)
+ config.of_node = pdata->of_node[i];
+ if (reg_data->constraints.name)
+ rail_name = reg_data->constraints.name;
+ else
+ rail_name = rk808_reg[i].name;
+
+ reg_data->supply_regulator = rail_name;
+ config.init_data = reg_data;
+
+ rk808_rdev = regulator_register(&rk808_reg[i], &config);
+ if (IS_ERR(rk808_rdev)) {
+ dev_err(rk808->dev,
+ "failed to register %d regulator\n", i);
+ return PTR_ERR(rk808_rdev);
+ }
+ rk808->rdev[i] = rk808_rdev;
+ }
+ return 0;
+}
+
+static struct platform_driver rk808_regulator_driver = {
+ .probe = rk808_regulator_probe,
+ .driver = {
+ .name = "rk808-regulator",
+ .owner = THIS_MODULE,
+ },
+};
+
+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<zhanqging@rock-chips.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:rk808-regulator");
--
1.7.9.5



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