Add the regulator driver for PMIC 88pm800 including device tree
support.
88pm800 is an I2C-based power-management IC containing voltage
regulators, a real-time clock, and some general purpose ADC devices,
Signed-off-by: Yi Zhang <yizh...@marvell.com>
Signed-off-by: Chao Xie <chao....@marvell.com>
---
.../devicetree/bindings/regulator/88pm800.txt | 38 ++
drivers/regulator/88pm800.c | 455 ++++++++++++++++++++
drivers/regulator/Kconfig | 10 +
drivers/regulator/Makefile | 1 +
4 files changed, 504 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/regulator/88pm800.txt
create mode 100644 drivers/regulator/88pm800.c
diff --git a/Documentation/devicetree/bindings/regulator/88pm800.txt
b/Documentation/devicetree/bindings/regulator/88pm800.txt
new file mode 100644
index 0000000..e8a54c2
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/88pm800.txt
@@ -0,0 +1,38 @@
+Marvell 88PM800 regulator
+
+Required properties:
+- compatible: "marvell,88pm800"
+- reg: I2C slave address
+- regulators: A node that houses a sub-node for each regulator within the
+ device. Each sub-node is identified using the node's name (or the deprecated
+ regulator-compatible property if present), with valid values listed below.
+ The content of each sub-node is defined by the standard binding for
+ regulators; see regulator.txt.
+
+The valid names for regulators are:
+
+ buck1, buck2, buck3, buck4, buck5, ldo1, ldo2, ldo3, ldo4, ldo5, ldo6, ldo7,
+ ldo8, ldo9, ldo10, ldo11, ldo12, ldo13, ldo14, ldo15, ldo16, ldo17, ldo18,
ldo19
+
+Example:
+
+ pmic: 88pm800@31 {
+ compatible = "marvell,88pm800";
+ reg = <0x31>;
+
+ regulators {
+ buck1 {
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <3950000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ ldo1 {
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <15000000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+...
+ };
+ };
diff --git a/drivers/regulator/88pm800.c b/drivers/regulator/88pm800.c
new file mode 100644
index 0000000..89f52b4
--- /dev/null
+++ b/drivers/regulator/88pm800.c
@@ -0,0 +1,455 @@
+/*
+ * Regulators driver for Marvell 88PM800
+ *
+ * Copyright (C) 2012 Marvell International Ltd.
+ * Joseph(Yossi) Hanin <yha...@marvell.com>
+ * Yi Zhang <yizh...@marvell.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/88pm80x.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/regulator/of_regulator.h>
+
+/* LDO1 with DVC[0..3] */
+#define PM800_LDO1_VOUT (0x08) /* VOUT1 */
+#define PM800_LDO1_VOUT_2 (0x09)
+#define PM800_LDO1_VOUT_3 (0x0A)
+#define PM800_LDO2_VOUT (0x0B)
+#define PM800_LDO3_VOUT (0x0C)
+#define PM800_LDO4_VOUT (0x0D)
+#define PM800_LDO5_VOUT (0x0E)
+#define PM800_LDO6_VOUT (0x0F)
+#define PM800_LDO7_VOUT (0x10)
+#define PM800_LDO8_VOUT (0x11)
+#define PM800_LDO9_VOUT (0x12)
+#define PM800_LDO10_VOUT (0x13)
+#define PM800_LDO11_VOUT (0x14)
+#define PM800_LDO12_VOUT (0x15)
+#define PM800_LDO13_VOUT (0x16)
+#define PM800_LDO14_VOUT (0x17)
+#define PM800_LDO15_VOUT (0x18)
+#define PM800_LDO16_VOUT (0x19)
+#define PM800_LDO17_VOUT (0x1A)
+#define PM800_LDO18_VOUT (0x1B)
+#define PM800_LDO19_VOUT (0x1C)
+
+/* BUCK1 with DVC[0..3] */
+#define PM800_BUCK1 (0x3C)
+#define PM800_BUCK1_1 (0x3D)
+#define PM800_BUCK1_2 (0x3E)
+#define PM800_BUCK1_3 (0x3F)
+#define PM800_BUCK2 (0x40)
+#define PM800_BUCK3 (0x41)
+#define PM800_BUCK3 (0x41)
+#define PM800_BUCK4 (0x42)
+#define PM800_BUCK4_1 (0x43)
+#define PM800_BUCK4_2 (0x44)
+#define PM800_BUCK4_3 (0x45)
+#define PM800_BUCK5 (0x46)
+
+#define PM800_BUCK_ENA (0x50)
+#define PM800_LDO_ENA1_1 (0x51)
+#define PM800_LDO_ENA1_2 (0x52)
+#define PM800_LDO_ENA1_3 (0x53)
+
+#define PM800_LDO_ENA2_1 (0x56)
+#define PM800_LDO_ENA2_2 (0x57)
+#define PM800_LDO_ENA2_3 (0x58)
+
+#define PM800_BUCK1_MISC1 (0x78)
+#define PM800_BUCK3_MISC1 (0x7E)
+#define PM800_BUCK4_MISC1 (0x81)
+#define PM800_BUCK5_MISC1 (0x84)
+
+struct pm800_regulator_volt_range {
+ int min_uv;
+ int max_uv;
+ int step_uv;
+ /* the register value for min_uv */
+ int min_val;
+};
+
+struct pm800_regulator_info {
+ struct regulator_desc desc;
+ int max_ua;
+
+ struct pm800_regulator_volt_range *volt;
+ unsigned int ranges;
+};
+
+struct pm800_regulators {
+ struct regulator_dev *regulators[PM800_ID_RG_MAX];
+ struct pm80x_chip *chip;
+ struct regmap *map;
+};
+
+/*
+ * vreg - the buck regs string.
+ * ereg - the string for the enable register.
+ * ebit - the bit number in the enable register.
+ * amax - the current
+ * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
+ * not the constant voltage table.
+ */
+#define PM800_BUCK(vreg, ereg, ebit, amax, volt_ranges)
\
+{ \
+ .desc = { \
+ .name = #vreg, \
+ .ops = &pm800_volt_range_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = PM800_ID_##vreg, \
+ .owner = THIS_MODULE, \
+ .vsel_reg = PM800_##vreg, \
+ .vsel_mask = 0x7f, \
+ .enable_reg = PM800_##ereg, \
+ .enable_mask = 1 << (ebit), \
+ }, \
+ .max_ua = (amax), \
+ .volt = (volt_ranges), \
+ .ranges = ARRAY_SIZE(volt_ranges), \
+}
+
+/*
+ * vreg - the LDO regs string
+ * ereg - the string for the enable register.
+ * ebit - the bit number in the enable register.
+ * amax - the current
+ * volt_table - the LDO voltage table
+ * For all the LDOes, there are too many ranges. Using volt_table will be
+ * simpler and faster.
+ */
+#define PM800_LDO(vreg, ereg, ebit, amax, ldo_volt_table) \
+{ \
+ .desc = { \
+ .name = #vreg, \
+ .ops = &pm800_volt_table_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = PM800_ID_##vreg, \
+ .owner = THIS_MODULE, \
+ .n_voltages = ARRAY_SIZE(ldo_volt_table), \
+ .vsel_reg = PM800_##vreg##_VOUT, \
+ .vsel_mask = 0x1f, \
+ .enable_reg = PM800_##ereg, \
+ .enable_mask = 1 << (ebit), \
+ .volt_table = ldo_volt_table, \
+ }, \
+ .max_ua = (amax), \
+}
+
+/* Ranges are sorted in ascending order. */
+static struct pm800_regulator_volt_range buck1_volt_range[] = {
+ {600000, 1587500, 12500, 0x0},
+ {1600000, 1800000, 50000, 0x50},
+};
+
+/* BUCK 2~5 have same ranges. */
+static struct pm800_regulator_volt_range buck2_5_volt_range[] = {
+ {600000, 1587500, 12500, 0x0},
+ {1600000, 3300000, 50000, 0x50},
+};
+
+static const unsigned int ldo1_volt_table[] = {
+ 600000, 650000, 700000, 750000, 800000, 850000, 900000, 950000,
+ 1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
+};
+
+static const unsigned int ldo2_volt_table[] = {
+ 1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
+};
+
+/* LDO 3~17 have same voltage table. */
+static const unsigned int ldo3_17_volt_table[] = {
+ 1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
+ 2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
+};
+
+/* LDO 18~19 have same voltage table. */
+static const unsigned int ldo18_19_volt_table[] = {
+ 1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
+};
+
+static int pm800_get_current_limit(struct regulator_dev *rdev)
+{
+ struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
+
+ return info->max_ua;
+}
+
+static int pm800_set_voltage(struct regulator_dev *rdev,
+ int min_uv, int max_uv, unsigned *selector)
+{
+ struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
+ struct pm800_regulator_volt_range *range;
+ int i, best_index = -1;
+
+ if (info->volt == NULL)
+ return -EINVAL;
+
+ /*
+ * Ranges are sorted in ascending order. So if we found a best_uv
+ * in this range, we can break out.
+ */
+ for (i = 0; i < info->ranges; i++) {
+ range = &info->volt[i];
+
+ if (min_uv <= range->max_uv && max_uv >= range->min_uv) {
+ if (min_uv <= range->min_uv)
+ best_index = 0;
+ else
+ best_index = (min_uv - range->min_uv +
+ range->step_uv - 1) / range->step_uv;
+ break;
+ }
+ }
+
+ if (best_index == -1)
+ return -EINVAL;
+
+ *selector = best_index + range->min_val;
+
+ return regulator_set_voltage_sel_regmap(rdev, *selector);
+}
+
+static int pm800_get_voltage(struct regulator_dev *rdev)
+{
+ struct pm800_regulator_info *info = rdev_get_drvdata(rdev);
+ struct pm800_regulator_volt_range *range;
+ int i, val, max_val, volt = -EINVAL;
+
+ if (info->volt == NULL)
+ return -EINVAL;
+
+ val = regulator_get_voltage_sel_regmap(rdev);
+ if (val < 0)
+ return val;
+
+ /* get the voltage via the register value */
+ for (i = 0; i < info->ranges; i++) {
+ range = &info->volt[i];
+ max_val = (range->max_uv - range->min_uv) / range->step_uv;
+
+ if (val >= range->min_val && val <= max_val) {
+ volt = (val - range->min_val) * range->step_uv
+ + range->min_uv;
+ break;
+ }
+ }
+
+ return volt;
+}
+
+static struct regulator_ops pm800_volt_range_ops = {
+ .set_voltage = pm800_set_voltage,
+ .get_voltage = pm800_get_voltage,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .get_current_limit = pm800_get_current_limit,
+};
+
+static struct regulator_ops pm800_volt_table_ops = {
+ .list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_iterate,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .get_current_limit = pm800_get_current_limit,
+};
+
+/* The array is indexed by id(PM800_ID_XXX) */
+static struct pm800_regulator_info pm800_regulator_info[] = {
+ PM800_BUCK(BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range),
+ PM800_BUCK(BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range),
+ PM800_BUCK(BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range),
+ PM800_BUCK(BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range),
+ PM800_BUCK(BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range),
+
+ PM800_LDO(LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
+ PM800_LDO(LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
+ PM800_LDO(LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
+ PM800_LDO(LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
+ PM800_LDO(LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
+};
+
+#define PM800_REGULATOR_OF_MATCH(_name, _id) \
+ [PM800_ID_##_id] = { \
+ .name = #_name, \
+ .driver_data = &pm800_regulator_info[PM800_ID_##_id], \
+ }
+
+static struct of_regulator_match pm800_regulator_matches[] = {
+ PM800_REGULATOR_OF_MATCH(buck1, BUCK1),
+ PM800_REGULATOR_OF_MATCH(buck2, BUCK2),
+ PM800_REGULATOR_OF_MATCH(buck3, BUCK3),
+ PM800_REGULATOR_OF_MATCH(buck4, BUCK4),
+ PM800_REGULATOR_OF_MATCH(buck5, BUCK5),
+ PM800_REGULATOR_OF_MATCH(ldo1, LDO1),
+ PM800_REGULATOR_OF_MATCH(ldo2, LDO2),
+ PM800_REGULATOR_OF_MATCH(ldo3, LDO3),
+ PM800_REGULATOR_OF_MATCH(ldo4, LDO4),
+ PM800_REGULATOR_OF_MATCH(ldo5, LDO5),
+ PM800_REGULATOR_OF_MATCH(ldo6, LDO6),
+ PM800_REGULATOR_OF_MATCH(ldo7, LDO7),
+ PM800_REGULATOR_OF_MATCH(ldo8, LDO8),
+ PM800_REGULATOR_OF_MATCH(ldo9, LDO9),
+ PM800_REGULATOR_OF_MATCH(ldo10, LDO10),
+ PM800_REGULATOR_OF_MATCH(ldo11, LDO11),
+ PM800_REGULATOR_OF_MATCH(ldo12, LDO12),
+ PM800_REGULATOR_OF_MATCH(ldo13, LDO13),
+ PM800_REGULATOR_OF_MATCH(ldo14, LDO14),
+ PM800_REGULATOR_OF_MATCH(ldo15, LDO15),
+ PM800_REGULATOR_OF_MATCH(ldo16, LDO16),
+ PM800_REGULATOR_OF_MATCH(ldo17, LDO17),
+ PM800_REGULATOR_OF_MATCH(ldo18, LDO18),
+ PM800_REGULATOR_OF_MATCH(ldo19, LDO19),
+};
+
+static int pm800_regulator_dt_init(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ ret = of_regulator_match(&pdev->dev, np,
+ pm800_regulator_matches,
+ ARRAY_SIZE(pm800_regulator_matches));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int pm800_regulator_probe(struct platform_device *pdev)
+{
+ struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+ struct pm80x_platform_data *pdata = pdev->dev.parent->platform_data;
+ struct pm800_regulators *pm800_data;
+ struct pm800_regulator_info *info;
+ struct regulator_config config = { };
+ struct regulator_init_data *init_data;
+ int i, ret;
+
+ if (!pdata || pdata->num_regulators == 0) {
+ if (IS_ENABLED(CONFIG_OF)) {
+ ret = pm800_regulator_dt_init(pdev);
+ if (ret)
+ return ret;
+ } else {
+ return -ENODEV;
+ }
+ } else if (pdata->num_regulators) {
+ /* Check whether num_regulator is valid. */
+ unsigned int count = 0;
+ for (i = 0; pdata->regulators[i]; i++)
+ count++;
+ if (count != pdata->num_regulators)
+ return -EINVAL;
+ } else {
+ return -EINVAL;
+ }
+
+ pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data),
+ GFP_KERNEL);
+ if (!pm800_data) {
+ dev_err(&pdev->dev, "Failed to allocate pm800_regualtors");
+ return -ENOMEM;
+ }
+
+ pm800_data->map = chip->subchip->regmap_power;
+ pm800_data->chip = chip;
+
+ platform_set_drvdata(pdev, pm800_data);
+
+ for (i = 0; i < PM800_ID_RG_MAX; i++) {
+ if (!pdata || pdata->num_regulators == 0)
+ init_data = pm800_regulator_matches[i].init_data;
+ else
+ init_data = pdata->regulators[i];
+ if (!init_data)
+ continue;
+ info = pm800_regulator_matches[i].driver_data;
+ config.dev = &pdev->dev;
+ config.init_data = init_data;
+ config.driver_data = info;
+ config.regmap = pm800_data->map;
+
+ pm800_data->regulators[i] =
+ regulator_register(&info->desc, &config);
+ if (IS_ERR(pm800_data->regulators[i])) {
+ ret = PTR_ERR(pm800_data->regulators[i]);
+ dev_err(&pdev->dev, "Failed to register %s\n",
+ info->desc.name);
+
+ while (--i >= 0 && pm800_data->regulators[i])
+ regulator_unregister(pm800_data->regulators[i]);
+
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int pm800_regulator_remove(struct platform_device *pdev)
+{
+ struct pm800_regulators *pm800_data = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; pm800_data->regulators[i] && i < PM800_ID_RG_MAX; i++)
+ regulator_unregister(pm800_data->regulators[i]);
+
+ return 0;
+}
+
+static struct platform_driver pm800_regulator_driver = {
+ .driver = {
+ .name = "88pm80x-regulator",
+ .owner = THIS_MODULE,
+ },
+ .probe = pm800_regulator_probe,
+ .remove = pm800_regulator_remove,
+};
+
+static int __init pm800_regulator_init(void)
+{
+ return platform_driver_register(&pm800_regulator_driver);
+}
+subsys_initcall(pm800_regulator_init);
+
+static void __exit pm800_regulator_exit(void)
+{
+ platform_driver_unregister(&pm800_regulator_driver);
+}
+module_exit(pm800_regulator_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Joseph(Yossi) Hanin <yha...@marvell.com>");
+MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
+MODULE_ALIAS("platform:88pm800-regulator");
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index a5d97ea..4521e34 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -514,5 +514,15 @@ config REGULATOR_AS3711
This driver provides support for the voltage regulators on the
AS3711 PMIC
+config REGULATOR_88PM800
+ bool "Marvell 88PM800 Power regulators"
+ depends on MFD_88PM800=y
+ help
+ This driver supports Marvell 88PM800 voltage regulator chips.
+ It delivers digitally programmable output,
+ the voltage is programmed via I2C interface.
+ It's suitable to support PXA988 chips to control VCC_MAIN and
+ various voltages.
+
endif
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 6e82503..015e5c2 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o
obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
+obj-$(CONFIG_REGULATOR_88PM800) += 88pm800.o
ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
--
1.7.4.1
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