[PATCH 6/7] regulator: hisilicon: Add hi655x pmic voltage regulator driver

From: Chen Feng
Date: Thu Nov 05 2015 - 08:50:13 EST

Add driver support for HiSilicon Hi655x voltage regulators.

Signed-off-by: Chen Feng <puck.chen@xxxxxxxxxxxxx>
Signed-off-by: Fei Wang <w.f@xxxxxxxxxx>
---
drivers/regulator/Kconfig | 13 ++
drivers/regulator/Makefile | 2 +
drivers/regulator/hi655x-regulator.c | 246 +++++++++++++++++++++++++++++
include/linux/regulator/hi655x-regulator.h | 63 ++++++++
4 files changed, 324 insertions(+)
create mode 100644 drivers/regulator/hi655x-regulator.c
create mode 100644 include/linux/regulator/hi655x-regulator.h

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 64bccff..9bbd43c 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -261,6 +261,19 @@ config REGULATOR_HI6421
21 general purpose LDOs, 3 dedicated LDOs, and 5 BUCKs. All
of them come with support to either ECO (idle) or sleep mode.

+config REGULATOR_HI6220_MTCMOS
+ bool "Hisilicon Hi6220 mtcmos support"
+ depends on ARCH_HISI
+ help
+ This driver provides support for the mtcmos regulators of Hi6220 Soc.
+
+config REGULATOR_HI655X
+ bool "HiSilicon Hi655x PMIC voltage regulator support"
+ depends on ARCH_HISI
+ help
+ This driver provides support for the voltage regulators on the
+ HiSilicon hi655x PMIC.
+
config REGULATOR_ISL9305
tristate "Intersil ISL9305 regulator"
depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 0f81749..7345d43 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -34,6 +34,8 @@ obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o
obj-$(CONFIG_REGULATOR_GPIO) += gpio-regulator.o
obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o
+obj-$(CONFIG_REGULATOR_HI6220_MTCMOS) += hi6220-mtcmos.o
+obj-$(CONFIG_REGULATOR_HI655X) += hi655x-regulator.o
obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
obj-$(CONFIG_REGULATOR_ISL9305) += isl9305.o
obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o
diff --git a/drivers/regulator/hi655x-regulator.c b/drivers/regulator/hi655x-regulator.c
new file mode 100644
index 0000000..b06c810
--- /dev/null
+++ b/drivers/regulator/hi655x-regulator.c
@@ -0,0 +1,246 @@
+/*
+ * Device driver for regulators in hi655x IC
+ *
+ * Copyright (c) 2015 Hisilicon.
+ *
+ * Fei Wang <w.f@xxxxxxxxxx>
+ * Chen Feng <puck.chen@xxxxxxxxxxxxx>
+ *
+ * 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/slab.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/delay.h>
+#include <linux/time.h>
+#include <linux/regulator/hi655x-regulator.h>
+#include <linux/mfd/hi655x-pmic.h>
+#include <linux/regmap.h>
+#include <linux/bitops.h>
+
+static int hi655x_is_enabled(struct regulator_dev *rdev)
+{
+ unsigned int value = 0;
+
+ struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
+ struct hi655x_regulator_ctrl_regs *ctrl_regs = &regulator->ctrl_regs;
+
+ regmap_read(rdev->regmap, ctrl_regs->status_reg, &value);
+ return (value & BIT(regulator->ctrl_mask));
+}
+
+static int hi655x_enable(struct regulator_dev *rdev)
+{
+ int ret = 0;
+ struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
+ struct hi655x_regulator_ctrl_regs *ctrl_regs = &regulator->ctrl_regs;
+
+ ret = regmap_update_bits(rdev->regmap, ctrl_regs->enable_reg,
+ regulator->ctrl_mask, regulator->ctrl_mask);
+ return ret;
+}
+
+static int hi655x_disable(struct regulator_dev *rdev)
+{
+ int ret = 0;
+ struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
+
+ if (!regulator) {
+ pr_err("get driver data error!\n");
+ return -ENODEV;
+ }
+ struct hi655x_regulator_ctrl_regs *ctrl_regs = &regulator->ctrl_regs;
+
+ ret = regmap_update_bits(rdev->regmap, ctrl_regs->disable_reg,
+ regulator->ctrl_mask, regulator->ctrl_mask);
+ return ret;
+}
+
+static int hi655x_get_voltage(struct regulator_dev *rdev)
+{
+ unsigned int value = 0;
+ struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
+
+ if (!regulator) {
+ pr_err("get driver data error!\n");
+ return -ENODEV;
+ }
+ struct hi655x_regulator_vset_regs *vset_regs = &regulator->vset_regs;
+
+ regmap_read(rdev->regmap, vset_regs->vset_reg, &value);
+
+ return regulator->vset_table[value];
+}
+
+static int hi655x_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned *selector)
+{
+ int i = 0;
+ int ret = 0;
+ int vol = 0;
+ struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
+
+ if (!regulator) {
+ pr_err("get driver data error!\n");
+ return -ENODEV;
+ }
+
+ struct hi655x_regulator_vset_regs *vset_regs = &regulator->vset_regs;
+
+ /**
+ * search the matched vol and get its index
+ */
+ for (i = 0; i < regulator->vol_numb; i++) {
+ vol = regulator->vset_table[i];
+ if ((vol >= min_uV) && (vol <= max_uV))
+ break;
+ }
+
+ if (i == regulator->vol_numb)
+ return -1;
+
+ regmap_update_bits(rdev->regmap, vset_regs->vset_reg,
+ regulator->vset_mask, i);
+ *selector = i;
+
+ return ret;
+}
+
+static unsigned int hi655x_map_mode(unsigned int mode)
+{
+ /* hi655x pmic on hi6220 SoC only support normal mode */
+ if (mode == REGULATOR_MODE_NORMAL)
+ return REGULATOR_MODE_NORMAL;
+ else
+ return -EINVAL;
+}
+
+static int hi655x_set_mode(struct regulator_dev *rdev,
+ unsigned int mode)
+
+{
+ if (mode == REGULATOR_MODE_NORMAL)
+ return 0;
+ else
+ return -EINVAL;
+}
+
+static struct regulator_ops hi655x_regulator_ops = {
+ .is_enabled = hi655x_is_enabled,
+ .enable = hi655x_enable,
+ .disable = hi655x_disable,
+ .list_voltage = regulator_list_voltage_table,
+ .get_voltage = hi655x_get_voltage,
+ .set_voltage = hi655x_set_voltage,
+ .set_mode = hi655x_set_mode,
+};
+
+static const struct of_device_id of_hi655x_regulator_match_tbl[] = {
+ {
+ .compatible = "hisilicon,hi655x-regulator-pmic",
+ },
+};
+MODULE_DEVICE_TABLE(of, of_hi655x_regulator_match_tbl);
+
+/**
+ * get the hi655x specific data from dt node.
+ */
+static void of_get_hi655x_ctr(struct hi655x_regulator *regulator,
+ struct device *dev, struct device_node *np)
+{
+ unsigned int *vset_table = NULL;
+
+ of_property_read_u32_array(np, "regulator-ctrl-regs",
+ (u32 *)&regulator->ctrl_regs, 0x3);
+ of_property_read_u32(np, "regulator-ctrl-mask", &regulator->ctrl_mask);
+ of_property_read_u32(np, "regulator-vset-regs",
+ (u32 *)&regulator->vset_regs);
+ of_property_read_u32(np, "regulator-vset-mask", &regulator->vset_mask);
+ of_property_read_u32(np, "regulator-n-vol", &regulator->vol_numb);
+ of_property_read_u32(np, "regulator-off-on-delay",
+ &regulator->rdesc.off_on_delay);
+
+ vset_table = devm_kzalloc(dev, regulator->vol_numb * sizeof(int),
+ GFP_KERNEL);
+
+ of_property_read_u32_array(np, "regulator-vset-table",
+ vset_table,
+ regulator->vol_numb);
+ regulator->vset_table = vset_table;
+ regulator->rdesc.volt_table = vset_table;
+ regulator->rdesc.n_voltages = regulator->vol_numb;
+}
+
+static int hi655x_regulator_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct hi655x_regulator *regulator;
+ struct hi655x_pmic *pmic;
+ struct regulator_init_data *init_data;
+ struct regulator_config config = { };
+ struct device_node *np = pdev->dev.of_node;
+
+ pmic = dev_get_drvdata(pdev->dev.parent);
+ if (!pmic) {
+ pr_err("no pmic in the regulator parent node\n");
+ return -ENODEV;
+ }
+
+ regulator = devm_kzalloc(&pdev->dev, sizeof(*regulator), GFP_KERNEL);
+ if (!regulator)
+ return -ENOMEM;
+ of_get_hi655x_ctr(regulator, &pdev->dev, np);
+
+ regulator->rdesc.name = dev_name(&pdev->dev);
+ regulator->rdesc.type = REGULATOR_VOLTAGE;
+ regulator->rdesc.owner = THIS_MODULE;
+ regulator->rdesc.of_map_mode = hi655x_map_mode;
+ regulator->rdesc.ops = &hi655x_regulator_ops;
+ init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
+ &regulator->rdesc);
+ if (!init_data) {
+ pr_err("get init data from dts error!\n");
+ return -EINVAL;
+ }
+ config.dev = &pdev->dev;
+ config.init_data = init_data;
+ config.driver_data = regulator;
+ config.regmap = pmic->regmap;
+
+ regulator->regdev = devm_regulator_register(&pdev->dev,
+ &regulator->rdesc,
+ &config);
+ if (IS_ERR(regulator->regdev)) {
+ pr_err("register regulator to system error!\n");
+ return PTR_ERR(regulator->regdev);
+ }
+
+ platform_set_drvdata(pdev, regulator);
+ return 0;
+}
+
+static struct platform_driver hi655x_regulator_driver = {
+ .driver = {
+ .name = "hi655x_regulator",
+ .of_match_table = of_hi655x_regulator_match_tbl,
+ },
+ .probe = hi655x_regulator_probe,
+};
+module_platform_driver(hi655x_regulator_driver);
+
+MODULE_AUTHOR("Chen Feng <puck.chen@xxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Hisi hi655x regulator driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/regulator/hi655x-regulator.h b/include/linux/regulator/hi655x-regulator.h
new file mode 100644
index 0000000..4a32095
--- /dev/null
+++ b/include/linux/regulator/hi655x-regulator.h
@@ -0,0 +1,63 @@
+/*
+ * Device driver for regulators in HI6553 IC
+ *
+ * Copyright (c) 2015 Hisilicon.
+ *
+ * Fei Wang <w.f@xxxxxxxxxx>
+ * Chen Feng <puck.chen@xxxxxxxxxxxxx>
+ *
+ * this regulator's probe function will be called lots of times,,
+ * because of there are lots of regulator nodes in dtb.
+ * so,that's say, the driver must be inited before the regulator nodes
+ * registor to system.
+ *
+ * Makefile have proved my guess, please refor to the makefile.
+ * when the code is rebuild i hope we can build pmu sub_system.
+ * init order can not base on compile
+ */
+
+#ifndef __HISI_HI655X_REGULATOR_H__
+#define __HISI_HI655X_REGULATOR_H__
+
+enum hi655x_regulator_type {
+ PMIC_BUCK_TYPE = 0,
+ PMIC_LDO_TYPE = 1,
+ PMIC_LVS_TYPE = 2,
+ PMIC_BOOST_TYPE = 3,
+ MTCMOS_SC_ON_TYPE = 4,
+ MTCMOS_ACPU_ON_TYPE = 5,
+ SCHARGE_TYPE = 6,
+};
+
+struct hi655x_regulator_ctrl_regs {
+ unsigned int enable_reg;
+ unsigned int disable_reg;
+ unsigned int status_reg;
+};
+
+struct hi655x_regulator_vset_regs {
+ unsigned int vset_reg;
+};
+
+struct hi655x_regulator_ctrl_data {
+ int shift;
+ unsigned int val;
+};
+
+struct hi655x_regulator_vset_data {
+ int shift;
+ unsigned int mask;
+};
+
+struct hi655x_regulator {
+ struct hi655x_regulator_ctrl_regs ctrl_regs;
+ struct hi655x_regulator_vset_regs vset_regs;
+ u32 ctrl_mask;
+ u32 vset_mask;
+ u32 vol_numb;
+ u32 *vset_table;
+ struct regulator_desc rdesc;
+ struct regulator_dev *regdev;
+};
+
+#endif
--
1.9.1

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