regulator: 88pm800: add regulator driver for 88pm800
authorChao Xie <chao.xie@marvell.com>
Thu, 18 Jul 2013 03:07:03 +0000 (23:07 -0400)
committerMark Brown <broonie@linaro.org>
Fri, 19 Jul 2013 18:08:36 +0000 (19:08 +0100)
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 <yizhang@marvell.com>
Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Documentation/devicetree/bindings/regulator/88pm800.txt [new file with mode: 0644]
drivers/regulator/88pm800.c [new file with mode: 0644]
drivers/regulator/Kconfig
drivers/regulator/Makefile

diff --git a/Documentation/devicetree/bindings/regulator/88pm800.txt b/Documentation/devicetree/bindings/regulator/88pm800.txt
new file mode 100644 (file)
index 0000000..e8a54c2
--- /dev/null
@@ -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 (file)
index 0000000..a7d962f
--- /dev/null
@@ -0,0 +1,377 @@
+/*
+ * Regulators driver for Marvell 88PM800
+ *
+ * Copyright (C) 2012 Marvell International Ltd.
+ * Joseph(Yossi) Hanin <yhanin@marvell.com>
+ * Yi Zhang <yizhang@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_info {
+       struct regulator_desc desc;
+       int max_ua;
+};
+
+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,                                  \
+               .linear_ranges          = volt_ranges,                  \
+               .n_linear_ranges        = ARRAY_SIZE(volt_ranges),      \
+               .vsel_reg               = PM800_##vreg,                 \
+               .vsel_mask              = 0x7f,                         \
+               .enable_reg             = PM800_##ereg,                 \
+               .enable_mask            = 1 << (ebit),                  \
+       },                                                              \
+       .max_ua         = (amax),                                       \
+}
+
+/*
+ * 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 const struct regulator_linear_range buck1_volt_range[] = {
+       { .min_uV = 600000, .max_uV = 1587500, .min_sel = 0, .max_sel = 0x4f,
+         .uV_step = 12500 },
+       { .min_uV = 1600000, .max_uV = 1800000, .min_sel = 0x50,
+         .max_sel = 0x54, .uV_step = 50000 },
+};
+
+/* BUCK 2~5 have same ranges. */
+static const struct regulator_linear_range buck2_5_volt_range[] = {
+       { .min_uV = 600000, .max_uV = 1587500,  .min_sel = 0, .max_sel = 0x4f,
+         .uV_step = 12500 },
+       { .min_uV = 1600000, .max_uV = 3300000, .min_sel = 0x50,
+         .max_sel = 0x72, .uV_step = 50000 },
+};
+
+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 struct regulator_ops pm800_volt_range_ops = {
+       .list_voltage = regulator_list_voltage_linear_range,
+       .map_voltage = regulator_map_voltage_linear_range,
+       .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,
+};
+
+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)
+                               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; 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,
+};
+
+module_platform_driver(pm800_regulator_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
+MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
+MODULE_ALIAS("platform:88pm800-regulator");
index 759b601b54ef7910b0de4421eb404d626c438e43..65b7d5b1bb395f3e0f0002625f9825aae7786b60 100644 (file)
@@ -64,6 +64,16 @@ config REGULATOR_USERSPACE_CONSUMER
 
          If unsure, say no.
 
+config REGULATOR_88PM800
+       tristate "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.
+
 config REGULATOR_88PM8607
        bool "Marvell 88PM8607 Power regulators"
        depends on MFD_88PM860X=y
index d240772d90eeea5a8fbf4b281a92286f23812d90..e292f26a1fbd0012730f038337a8f5812506a32d 100644 (file)
@@ -9,6 +9,7 @@ obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
 obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o
 obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o
 
+obj-$(CONFIG_REGULATOR_88PM800) += 88pm800.o
 obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
 obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o
 obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o