regulator: hi655x: enable regulator for hi655x PMIC

Add the regulator driver for hi655x PMIC.

Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Fei Wang <w.f@huawei.com>
Signed-off-by: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Reviewed-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

3 files changed, 236 insertions, 0 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 8155e80dd3f8..cd8ce7e9d451 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 980b1943fa81..422786cc4b74 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_LM363X) += lm363x-regulator.o
diff --git a/drivers/regulator/hi655x-regulator.c b/drivers/regulator/hi655x-regulator.c
new file mode 100644
index 000000000000..aca18466f522
--- /dev/null
+++ b/drivers/regulator/hi655x-regulator.c
@@ -0,0 +1,227 @@
+/*
+ * Device driver for regulators in Hi655x IC
+ *
+ * Copyright (c) 2016 Hisilicon.
+ *
+ * Authors:
+ * Chen Feng <puck.chen@hisilicon.com>
+ * Fei  Wang <w.f@huawei.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/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_regs;
+	unsigned int ctrl_mask;
+	struct regulator_desc rdesc;
+};
+
+/* LDO7 & LDO10 */
+static const unsigned int ldo7_voltages[] = {
+	1800000, 1850000, 2850000, 2900000,
+	3000000, 3100000, 3200000, 3300000,
+};
+
+static const unsigned int ldo19_voltages[] = {
+	1800000, 1850000, 1900000, 1750000,
+	2800000, 2850000, 2900000, 3000000,
+};
+
+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,
+};
+
+static struct regulator_ops hi655x_ldo_linear_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = hi655x_disable,
+	.is_enabled = hi655x_is_enabled,
+	.list_voltage = regulator_list_voltage_linear,
+	.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,                         \
+		.of_match        = of_match_ptr(#_ID),           \
+		.ops             = &hi655x_regulator_ops,        \
+		.regulators_node = of_match_ptr("regulators"),   \
+		.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     = BIT(cmask),                   \
+	},                                                       \
+	.disable_reg = HI655X_BUS_ADDR(dreg),                    \
+	.status_reg = HI655X_BUS_ADDR(sreg),                     \
+	.ctrl_mask = cmask,                                      \
+}
+
+#define HI655X_LDO_LINEAR(_ID, vreg, vmask, ereg, dreg,          \
+			  sreg, cmask, minv, nvolt, vstep) {     \
+	.rdesc = {                                               \
+		.name            = #_ID,                         \
+		.of_match        = of_match_ptr(#_ID),           \
+		.ops             = &hi655x_ldo_linear_ops,       \
+		.regulators_node = of_match_ptr("regulators"),   \
+		.type            = REGULATOR_VOLTAGE,            \
+		.id              = HI655X_##_ID,                 \
+		.owner           = THIS_MODULE,                  \
+		.min_uV          = minv,                         \
+		.n_voltages      = nvolt,                        \
+		.uV_step         = vstep,                        \
+		.vsel_reg        = HI655X_BUS_ADDR(vreg),        \
+		.vsel_mask       = vmask,                        \
+		.enable_reg      = HI655X_BUS_ADDR(ereg),        \
+		.enable_mask     = BIT(cmask),                   \
+	},                                                       \
+	.disable_reg = HI655X_BUS_ADDR(dreg),                    \
+	.status_reg = HI655X_BUS_ADDR(sreg),                     \
+	.ctrl_mask = cmask,                                      \
+}
+
+static struct hi655x_regulator regulators[] = {
+	HI655X_LDO_LINEAR(LDO2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01,
+			  2500000, 8, 100000),
+	HI655X_LDO(LDO7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages),
+	HI655X_LDO(LDO10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages),
+	HI655X_LDO_LINEAR(LDO13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04,
+			  1600000, 8, 50000),
+	HI655X_LDO_LINEAR(LDO14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05,
+			  2500000, 8, 100000),
+	HI655X_LDO_LINEAR(LDO15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06,
+			  1600000, 8, 50000),
+	HI655X_LDO_LINEAR(LDO17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00,
+			  2500000, 8, 100000),
+	HI655X_LDO(LDO19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages),
+	HI655X_LDO_LINEAR(LDO21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04,
+			  1650000, 8, 50000),
+	HI655X_LDO(LDO22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages),
+};
+
+static int hi655x_regulator_probe(struct platform_device *pdev)
+{
+	unsigned int i;
+	struct hi655x_regulator *regulator;
+	struct hi655x_pmic *pmic;
+	struct regulator_config config = { };
+	struct regulator_dev *rdev;
+
+	pmic = dev_get_drvdata(pdev->dev.parent);
+	if (!pmic) {
+		dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
+		return -ENODEV;
+	}
+
+	regulator = devm_kzalloc(&pdev->dev, sizeof(*regulator), GFP_KERNEL);
+	if (!regulator)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, regulator);
+
+	config.dev = pdev->dev.parent;
+	config.regmap = pmic->regmap;
+	config.driver_data = regulator;
+	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+		rdev = devm_regulator_register(&pdev->dev,
+					       &regulators[i].rdesc,
+					       &config);
+		if (IS_ERR(rdev)) {
+			dev_err(&pdev->dev, "failed to register regulator %s\n",
+				regulator->rdesc.name);
+			return PTR_ERR(rdev);
+		}
+	}
+	return 0;
+}
+
+static struct platform_driver hi655x_regulator_driver = {
+	.driver = {
+		.name	= "hi655x-regulator",
+	},
+	.probe	= hi655x_regulator_probe,
+};
+module_platform_driver(hi655x_regulator_driver);
+
+MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");
+MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver");
+MODULE_LICENSE("GPL v2");