regulator: rn5t618: add driver for Ricoh RN5T618 regulators

This driver supports the 3 DCDC and 7 LDO regulators available on
Ricoh RN5T618 PMIC.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index fb32babf756ee92cf18eb7233552802d9801519f..ac0e6437b7b5a66b4767ef18848beb4499d1de1e 100644 (file)
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -469,6 +469,12 @@ config REGULATOR_RK808
          through regulator interface. The device supports multiple DCDC/LDO
          outputs which can be controlled by i2c communication.
 
+config REGULATOR_RN5T618
+       tristate "Ricoh RN5T618 voltage regulators"
+       depends on MFD_RN5T618
+       help
+         Say y here to support the regulators found on Ricoh RN5T618 PMIC.
+
 config REGULATOR_S2MPA01
        tristate "Samsung S2MPA01 voltage regulator"
        depends on MFD_SEC_CORE

diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 236fdbb2b78621ade423b854c9e9c2a4a651eb95..3b767c60d76b3b0ab4d484474b2b3824d2df1444 100644 (file)
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -63,6 +63,7 @@ obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
 obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
 obj-$(CONFIG_REGULATOR_RC5T583)  += rc5t583-regulator.o
 obj-$(CONFIG_REGULATOR_RK808)   += rk808-regulator.o
+obj-$(CONFIG_REGULATOR_RN5T618) += rn5t618-regulator.o
 obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
 obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
 obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o

diff --git a/drivers/regulator/rn5t618-regulator.c b/drivers/regulator/rn5t618-regulator.c
new file mode 100644 (file)
index 0000000..e58d79a
--- /dev/null
+++ b/drivers/regulator/rn5t618-regulator.c
@@ -0,0 +1,143 @@
+/*
+ * Regulator driver for Ricoh RN5T618 PMIC
+ *
+ * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/mfd/rn5t618.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+static struct regulator_ops rn5t618_reg_ops = {
+       .enable                 = regulator_enable_regmap,
+       .disable                = regulator_disable_regmap,
+       .is_enabled             = regulator_is_enabled_regmap,
+       .set_voltage_sel        = regulator_set_voltage_sel_regmap,
+       .get_voltage_sel        = regulator_get_voltage_sel_regmap,
+       .list_voltage           = regulator_list_voltage_linear,
+};
+
+#define REG(rid, ereg, emask, vreg, vmask, min, max, step)             \
+       [RN5T618_##rid] = {                                             \
+               .name           = #rid,                                 \
+               .id             = RN5T618_##rid,                        \
+               .type           = REGULATOR_VOLTAGE,                    \
+               .owner          = THIS_MODULE,                          \
+               .ops            = &rn5t618_reg_ops,                     \
+               .n_voltages     = ((max) - (min)) / (step) + 1,         \
+               .min_uV         = (min),                                \
+               .uV_step        = (step),                               \
+               .enable_reg     = RN5T618_##ereg,                       \
+               .enable_mask    = (emask),                              \
+               .vsel_reg       = RN5T618_##vreg,                       \
+               .vsel_mask      = (vmask),                              \
+       }
+
+static struct regulator_desc rn5t618_regulators[] = {
+       /* DCDC */
+       REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
+       REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
+       REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
+       /* LDO */
+       REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
+       REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
+       REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
+       REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
+       REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
+       /* LDO RTC */
+       REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000),
+       REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
+};
+
+static struct of_regulator_match rn5t618_matches[] = {
+       [RN5T618_DCDC1]         = { .name = "DCDC1" },
+       [RN5T618_DCDC2]         = { .name = "DCDC2" },
+       [RN5T618_DCDC3]         = { .name = "DCDC3" },
+       [RN5T618_LDO1]          = { .name = "LDO1" },
+       [RN5T618_LDO2]          = { .name = "LDO2" },
+       [RN5T618_LDO3]          = { .name = "LDO3" },
+       [RN5T618_LDO4]          = { .name = "LDO4" },
+       [RN5T618_LDO5]          = { .name = "LDO5" },
+       [RN5T618_LDORTC1]       = { .name = "LDORTC1" },
+       [RN5T618_LDORTC2]       = { .name = "LDORTC2" },
+};
+
+static int rn5t618_regulator_parse_dt(struct platform_device *pdev)
+{
+       struct device_node *np, *regulators;
+       int ret;
+
+       np = of_node_get(pdev->dev.parent->of_node);
+       if (!np)
+               return 0;
+
+       regulators = of_get_child_by_name(np, "regulators");
+       if (!regulators) {
+               dev_err(&pdev->dev, "regulators node not found\n");
+               return -EINVAL;
+       }
+
+       ret = of_regulator_match(&pdev->dev, regulators, rn5t618_matches,
+                                ARRAY_SIZE(rn5t618_matches));
+       of_node_put(regulators);
+       if (ret < 0) {
+               dev_err(&pdev->dev, "error parsing regulator init data: %d\n",
+                       ret);
+       }
+
+       return 0;
+}
+
+static int rn5t618_regulator_probe(struct platform_device *pdev)
+{
+       struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent);
+       struct regulator_config config = { };
+       struct regulator_dev *rdev;
+       int ret, i;
+
+       ret = rn5t618_regulator_parse_dt(pdev);
+       if (ret)
+               return ret;
+
+       for (i = 0; i < RN5T618_REG_NUM; i++) {
+               config.dev = &pdev->dev;
+               config.init_data = rn5t618_matches[i].init_data;
+               config.of_node = rn5t618_matches[i].of_node;
+               config.regmap = rn5t618->regmap;
+
+               rdev = devm_regulator_register(&pdev->dev,
+                                              &rn5t618_regulators[i],
+                                              &config);
+               if (IS_ERR(rdev)) {
+                       dev_err(&pdev->dev, "failed to register %s regulator\n",
+                               rn5t618_regulators[i].name);
+                       return PTR_ERR(rdev);
+               }
+       }
+
+       return 0;
+}
+
+static struct platform_driver rn5t618_regulator_driver = {
+       .probe = rn5t618_regulator_probe,
+       .driver = {
+               .name   = "rn5t618-regulator",
+       },
+};
+
+module_platform_driver(rn5t618_regulator_driver);
+
+MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
+MODULE_DESCRIPTION("RN5T618 regulator driver");
+MODULE_LICENSE("GPL v2");