[PATCH v4 4/5] regulator: add regulator driver of hi655x pmic

From: Chen Feng
Date: Mon Jan 04 2016 - 07:33:31 EST

Add regulator support for hi655x pmic

Signed-off-by: Chen Feng <puck.chen@xxxxxxxxxxxxx>
Signed-off-by: Fei Wang <w.f@xxxxxxxxxx>
Signed-off-by: Xinwei Kong <kong.kongxinwei@xxxxxxxxxxxxx>
---
drivers/regulator/Kconfig | 8 ++
drivers/regulator/Makefile | 1 +
drivers/regulator/hi655x-regulator.c | 232 +++++++++++++++++++++++++++++++++++
3 files changed, 241 insertions(+)
create mode 100644 drivers/regulator/hi655x-regulator.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 8df0b0e..2e9eaa7 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -261,6 +261,14 @@ 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_HI655X
+ tristate "Hisilicon HI655X PMIC regulators support"
+ depends on ARCH_HISI || COMPILE_TEST
+ depends on MFD_HI655X_PMIC && OF
+ help
+ This driver provides support for the voltage regulators of the
+ Hisilicon Hi655x PMIC device.
+
config REGULATOR_ISL9305
tristate "Intersil ISL9305 regulator"
depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 0f81749..8e4db96 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -34,6 +34,7 @@ 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-$(CONFIG_REGULATOR_HI655X) += hi655x-regulator.o
obj-$(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..47161e6
--- /dev/null
+++ b/drivers/regulator/hi655x-regulator.c
@@ -0,0 +1,232 @@
+/*
+ * Device driver for regulators in hi655x IC
+ *
+ * Copyright (c) 2016 Hisilicon.
+ *
+ * Chen Feng <puck.chen@xxxxxxxxxxxxx>
+ * Fei Wang <w.f@xxxxxxxxxx>
+ *
+ * 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/bitops.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/hi655x-pmic.h>
+
+struct hi655x_regulator {
+ unsigned int disable_reg;
+ unsigned int status_reg;
+ unsigned int ctrl_mask;
+ struct regulator_desc rdesc;
+};
+
+/*LDO 2 & LDO 14*/
+static const unsigned int ldo2_voltages[] = {
+ 2500000, 2600000, 2700000, 2800000,
+ 2900000, 3000000, 3100000, 3200000,
+};
+
+/*LDO7 & LDO10*/
+static const unsigned int ldo7_voltages[] = {
+ 1800000, 1850000, 2850000, 2900000,
+ 3000000, 3100000, 3200000, 3300000,
+};
+
+/*LDO13 & LDO15*/
+static const unsigned int ldo13_voltages[] = {
+ 1600000, 1650000, 1700000, 1750000,
+ 1800000, 1850000, 1900000, 1950000,
+};
+
+static const unsigned int ldo17_voltages[] = {
+ 2500000, 2600000, 2700000, 2800000,
+ 2900000, 3000000, 3100000, 3200000,
+};
+
+static const unsigned int ldo19_voltages[] = {
+ 1800000, 1850000, 1900000, 1750000,
+ 2800000, 2850000, 2900000, 3000000,
+};
+
+static const unsigned int ldo21_voltages[] = {
+ 1650000, 1700000, 1750000, 1800000,
+ 1850000, 1900000, 1950000, 2000000,
+};
+
+static const unsigned int ldo22_voltages[] = {
+ 900000, 1000000, 1050000, 1100000,
+ 1150000, 1175000, 1185000, 1200000,
+};
+
+enum hi655x_regulator_id {
+ hi655x_ldo0,
+ hi655x_ldo1,
+ hi655x_ldo2,
+ hi655x_ldo3,
+ hi655x_ldo4,
+ hi655x_ldo5,
+ hi655x_ldo6,
+ hi655x_ldo7,
+ hi655x_ldo8,
+ hi655x_ldo9,
+ hi655x_ldo10,
+ hi655x_ldo11,
+ hi655x_ldo12,
+ hi655x_ldo13,
+ hi655x_ldo14,
+ hi655x_ldo15,
+ hi655x_ldo16,
+ hi655x_ldo17,
+ hi655x_ldo18,
+ hi655x_ldo19,
+ hi655x_ldo20,
+ hi655x_ldo21,
+ hi655x_ldo22,
+};
+
+static int hi655x_is_enabled(struct regulator_dev *rdev)
+{
+ unsigned int value = 0;
+
+ struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
+
+ regmap_read(rdev->regmap, regulator->status_reg, &value);
+ return (value & BIT(regulator->ctrl_mask));
+}
+
+static int hi655x_disable(struct regulator_dev *rdev)
+{
+ int ret = 0;
+
+ struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
+
+ ret = regmap_write(rdev->regmap, regulator->disable_reg,
+ BIT(regulator->ctrl_mask));
+ return ret;
+}
+
+static struct regulator_ops hi655x_regulator_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = hi655x_disable,
+ .is_enabled = hi655x_is_enabled,
+ .list_voltage = regulator_list_voltage_table,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+};
+
+#define HI655X_LDO(_id, vreg, vmask, ereg, dreg, \
+ sreg, cmask, vtable) { \
+ .rdesc = { \
+ .name = #_id, \
+ .ops = &hi655x_regulator_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = hi655x_##_id, \
+ .owner = THIS_MODULE, \
+ .n_voltages = ARRAY_SIZE(vtable), \
+ .volt_table = vtable, \
+ .vsel_reg = HI655X_BUS_ADDR(vreg), \
+ .vsel_mask = vmask, \
+ .enable_reg = HI655X_BUS_ADDR(ereg), \
+ .enable_mask = cmask, \
+ }, \
+ .disable_reg = HI655X_BUS_ADDR(dreg), \
+ .status_reg = HI655X_BUS_ADDR(sreg), \
+ .ctrl_mask = cmask, \
+ }
+
+static struct hi655x_regulator regulators[] = {
+ HI655X_LDO(ldo2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo2_voltages),
+ HI655X_LDO(ldo7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages),
+ HI655X_LDO(ldo10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages),
+ HI655X_LDO(ldo13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04, ldo13_voltages),
+ HI655X_LDO(ldo14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05, ldo2_voltages),
+ HI655X_LDO(ldo15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06, ldo13_voltages),
+ HI655X_LDO(ldo17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00, ldo17_voltages),
+ HI655X_LDO(ldo19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages),
+ HI655X_LDO(ldo21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04, ldo21_voltages),
+ HI655X_LDO(ldo22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages),
+};
+
+static const struct of_device_id of_hi655x_regulator_match_tbl[] = {
+ {
+ .compatible = "hisilicon,hi655x-regulator",
+ },
+};
+MODULE_DEVICE_TABLE(of, of_hi655x_regulator_match_tbl);
+
+static int hi655x_regulator_probe(struct platform_device *pdev)
+{
+ unsigned int i;
+ struct regulator_dev *rdev;
+ struct hi655x_pmic *pmic;
+ struct hi655x_regulator *regulator;
+ struct regulator_init_data *init_data;
+ struct regulator_config config = { };
+ struct device *dev = &pdev->dev;
+ struct device_node *np = pdev->dev.of_node;
+
+ pmic = dev_get_drvdata(dev->parent);
+ if (!pmic) {
+ dev_err(dev, "no pmic in the regulator parent node\n");
+ return -ENODEV;
+ }
+
+ regulator = devm_kzalloc(dev, sizeof(*regulator), GFP_KERNEL);
+ if (!regulator)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+ if (!of_node_cmp(np->name, regulators[i].rdesc.name))
+ break;
+ }
+
+ if (i == ARRAY_SIZE(regulators)) {
+ dev_err(dev, "error regulator %s int dts\n", np->name);
+ return -ENODEV;
+ }
+
+ regulator = &regulators[i];
+ init_data = of_get_regulator_init_data(dev, np,
+ &regulator->rdesc);
+ if (!init_data)
+ return -EINVAL;
+
+ config.dev = dev;
+ config.init_data = init_data;
+ config.driver_data = regulator;
+ config.regmap = pmic->regmap;
+ config.of_node = pdev->dev.of_node;
+
+ rdev = devm_regulator_register(dev, &regulator->rdesc,
+ &config);
+ if (IS_ERR(rdev))
+ return PTR_ERR(rdev);
+
+ 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 PMIC driver");
+MODULE_LICENSE("GPL v2");
--
1.9.1

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