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Message-Id: <1409091237-16722-3-git-send-email-b.galvani@gmail.com>
Date: Wed, 27 Aug 2014 00:13:55 +0200
From: Beniamino Galvani <b.galvani@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Lee Jones <lee.jones@...aro.org>,
Samuel Ortiz <sameo@...ux.intel.com>,
Mark Brown <broonie@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>,
Wim Van Sebroeck <wim@...ana.be>,
linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Grant Likely <grant.likely@...aro.org>,
Carlo Caione <carlo@...one.org>,
Beniamino Galvani <b.galvani@...il.com>
Subject: [PATCH 2/4] regulator: 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@...il.com>
---
drivers/regulator/Kconfig | 6 ++
drivers/regulator/Makefile | 1 +
drivers/regulator/rn5t618-regulator.c | 143 +++++++++++++++++++++++++++++++++
include/linux/mfd/rn5t618.h | 14 ++++
4 files changed, 164 insertions(+)
create mode 100644 drivers/regulator/rn5t618-regulator.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 2dc8289..9d14e62 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -459,6 +459,12 @@ config REGULATOR_RC5T583
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 aa4a6aa..f7c4473 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -62,6 +62,7 @@ obj-$(CONFIG_REGULATOR_PBIAS) += pbias-regulator.o
obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
obj-$(CONFIG_REGULATOR_RC5T583) += rc5t583-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
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@...il.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@...il.com>");
+MODULE_DESCRIPTION("RN5T618 regulator driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/rn5t618.h b/include/linux/mfd/rn5t618.h
index 87686eb..e3571d1 100644
--- a/include/linux/mfd/rn5t618.h
+++ b/include/linux/mfd/rn5t618.h
@@ -203,6 +203,20 @@
#define RN5T618_REPCNT_REPWRON BIT(0)
#define RN5T618_SLPCNT_SWPWROFF BIT(0)
+enum {
+ RN5T618_DCDC1,
+ RN5T618_DCDC2,
+ RN5T618_DCDC3,
+ RN5T618_LDO1,
+ RN5T618_LDO2,
+ RN5T618_LDO3,
+ RN5T618_LDO4,
+ RN5T618_LDO5,
+ RN5T618_LDORTC1,
+ RN5T618_LDORTC2,
+ RN5T618_REG_NUM,
+};
+
struct rn5t618 {
struct regmap *regmap;
};
--
1.7.10.4
--
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