From: Milo Kim <milo.kim@ti.com>
To: <devicetree@vger.kernel.org>, <lee.jones@linaro.org>,
<linux-kernel@vger.kernel.org>
Cc: Milo Kim <milo.kim@ti.com>, Mark Brown <broonie@kernel.org>
Subject: [PATCH RESEND 16/16] regulator: add LM363X driver
Date: Mon, 2 Nov 2015 14:24:35 +0900 [thread overview]
Message-ID: <1446441875-1256-17-git-send-email-milo.kim@ti.com> (raw)
In-Reply-To: <1446441875-1256-1-git-send-email-milo.kim@ti.com>
LM363X regulator driver supports LM3631 and LM3632.
LM3631 has 5 regulators. LM3632 provides 3 regulators.
One boost output and LDOs are used for the display module.
Boost voltage is configurable but always on.
Supported operations for LDOs are enabled/disabled and voltage change.
Two LDOs of LM3632 can be controlled by external pins.
Those are described in the device tree bindings.
Cc: Mark Brown <broonie@kernel.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Milo Kim <milo.kim@ti.com>
---
drivers/regulator/Kconfig | 9 +
drivers/regulator/Makefile | 1 +
drivers/regulator/lm363x-regulator.c | 349 +++++++++++++++++++++++++++++++++++
3 files changed, 359 insertions(+)
create mode 100644 drivers/regulator/lm363x-regulator.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 64bccff..efac1eb 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -274,6 +274,15 @@ config REGULATOR_ISL6271A
help
This driver supports ISL6271A voltage regulator chip.
+config REGULATOR_LM363X
+ tristate "TI LM363X voltage regulators"
+ depends on MFD_TI_LMU
+ help
+ This driver supports LM3631 and LM3632 voltage regulators for
+ the LCD bias.
+ One boost output voltage is configurable and always on.
+ Other LDOs are used for the display module.
+
config REGULATOR_LP3971
tristate "National Semiconductors LP3971 PMIC regulator driver"
depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 0f81749..0ea87cd 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_REGULATOR_GPIO) += gpio-regulator.o
obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o
obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
obj-$(CONFIG_REGULATOR_ISL9305) += isl9305.o
+obj-$(CONFIG_REGULATOR_LM363X) += lm363x-regulator.o
obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o
obj-$(CONFIG_REGULATOR_LP3972) += lp3972.o
obj-$(CONFIG_REGULATOR_LP872X) += lp872x.o
diff --git a/drivers/regulator/lm363x-regulator.c b/drivers/regulator/lm363x-regulator.c
new file mode 100644
index 0000000..28408d4
--- /dev/null
+++ b/drivers/regulator/lm363x-regulator.c
@@ -0,0 +1,349 @@
+/*
+ * TI LM363X Regulator Driver
+ *
+ * Copyright 2015 Texas Instruments
+ *
+ * Author: Milo Kim <milo.kim@ti.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/err.h>
+#include <linux/kernel.h>
+#include <linux/mfd/ti-lmu.h>
+#include <linux/mfd/ti-lmu-register.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/slab.h>
+
+/* LM3631 */
+#define LM3631_BOOST_VSEL_MAX 0x25
+#define LM3631_LDO_VSEL_MAX 0x28
+#define LM3631_CONT_VSEL_MAX 0x03
+#define LM3631_VBOOST_MIN 4500000
+#define LM3631_VCONT_MIN 1800000
+#define LM3631_VLDO_MIN 4000000
+#define ENABLE_TIME_USEC 1000
+
+/* LM3632 */
+#define LM3632_BOOST_VSEL_MAX 0x26
+#define LM3632_LDO_VSEL_MAX 0x29
+#define LM3632_VBOOST_MIN 4500000
+#define LM3632_VLDO_MIN 4000000
+
+/* Common */
+#define LM363X_STEP_50mV 50000
+#define LM363X_STEP_500mV 500000
+
+struct lm363x_regulator {
+ struct ti_lmu *lmu;
+ struct regulator_dev *regulator;
+};
+
+const int ldo_cont_enable_time[] = {
+ 0, 2000, 5000, 10000, 20000, 50000, 100000, 200000,
+};
+
+static int lm363x_regulator_enable_time(struct regulator_dev *rdev)
+{
+ struct lm363x_regulator *lm363x_regulator = rdev_get_drvdata(rdev);
+ enum lm363x_regulator_id id = rdev_get_id(rdev);
+ u8 val, addr, mask;
+
+ switch (id) {
+ case LM3631_LDO_CONT:
+ addr = LM3631_REG_ENTIME_VCONT;
+ mask = LM3631_ENTIME_CONT_MASK;
+ break;
+ case LM3631_LDO_OREF:
+ addr = LM3631_REG_ENTIME_VOREF;
+ mask = LM3631_ENTIME_MASK;
+ break;
+ case LM3631_LDO_POS:
+ addr = LM3631_REG_ENTIME_VPOS;
+ mask = LM3631_ENTIME_MASK;
+ break;
+ case LM3631_LDO_NEG:
+ addr = LM3631_REG_ENTIME_VNEG;
+ mask = LM3631_ENTIME_MASK;
+ break;
+ default:
+ return 0;
+ }
+
+ if (ti_lmu_read_byte(lm363x_regulator->lmu, addr, &val))
+ return -EINVAL;
+
+ val = (val & mask) >> LM3631_ENTIME_SHIFT;
+
+ if (id == LM3631_LDO_CONT)
+ return ldo_cont_enable_time[val];
+ else
+ return ENABLE_TIME_USEC * val;
+}
+
+static struct regulator_ops lm363x_boost_voltage_table_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+};
+
+static struct regulator_ops lm363x_regulator_voltage_table_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable_time = lm363x_regulator_enable_time,
+};
+
+static const struct regulator_desc lm363x_regulator_desc[] = {
+ /* LM3631 */
+ {
+ .name = "vboost",
+ .id = LM3631_BOOST,
+ .ops = &lm363x_boost_voltage_table_ops,
+ .n_voltages = LM3631_BOOST_VSEL_MAX + 1,
+ .min_uV = LM3631_VBOOST_MIN,
+ .uV_step = LM363X_STEP_50mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM3631_REG_VOUT_BOOST,
+ .vsel_mask = LM3631_VOUT_MASK,
+ },
+ {
+ .name = "ldo_cont",
+ .id = LM3631_LDO_CONT,
+ .ops = &lm363x_regulator_voltage_table_ops,
+ .n_voltages = LM3631_CONT_VSEL_MAX + 1,
+ .min_uV = LM3631_VCONT_MIN,
+ .uV_step = LM363X_STEP_500mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM3631_REG_VOUT_CONT,
+ .vsel_mask = LM3631_VOUT_CONT_MASK,
+ .enable_reg = LM3631_REG_LDO_CTRL2,
+ .enable_mask = LM3631_EN_CONT_MASK,
+ },
+ {
+ .name = "ldo_oref",
+ .id = LM3631_LDO_OREF,
+ .ops = &lm363x_regulator_voltage_table_ops,
+ .n_voltages = LM3631_LDO_VSEL_MAX + 1,
+ .min_uV = LM3631_VLDO_MIN,
+ .uV_step = LM363X_STEP_50mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM3631_REG_VOUT_OREF,
+ .vsel_mask = LM3631_VOUT_MASK,
+ .enable_reg = LM3631_REG_LDO_CTRL1,
+ .enable_mask = LM3631_EN_OREF_MASK,
+ },
+ {
+ .name = "ldo_vpos",
+ .id = LM3631_LDO_POS,
+ .ops = &lm363x_regulator_voltage_table_ops,
+ .n_voltages = LM3631_LDO_VSEL_MAX + 1,
+ .min_uV = LM3631_VLDO_MIN,
+ .uV_step = LM363X_STEP_50mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM3631_REG_VOUT_POS,
+ .vsel_mask = LM3631_VOUT_MASK,
+ .enable_reg = LM3631_REG_LDO_CTRL1,
+ .enable_mask = LM3631_EN_VPOS_MASK,
+ },
+ {
+ .name = "ldo_vneg",
+ .id = LM3631_LDO_NEG,
+ .ops = &lm363x_regulator_voltage_table_ops,
+ .n_voltages = LM3631_LDO_VSEL_MAX + 1,
+ .min_uV = LM3631_VLDO_MIN,
+ .uV_step = LM363X_STEP_50mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM3631_REG_VOUT_NEG,
+ .vsel_mask = LM3631_VOUT_MASK,
+ .enable_reg = LM3631_REG_LDO_CTRL1,
+ .enable_mask = LM3631_EN_VNEG_MASK,
+ },
+ /* LM3632 */
+ {
+ .name = "vboost",
+ .id = LM3632_BOOST,
+ .ops = &lm363x_boost_voltage_table_ops,
+ .n_voltages = LM3632_BOOST_VSEL_MAX + 1,
+ .min_uV = LM3632_VBOOST_MIN,
+ .uV_step = LM363X_STEP_50mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM3632_REG_VOUT_BOOST,
+ .vsel_mask = LM3632_VOUT_MASK,
+ },
+ {
+ .name = "ldo_vpos",
+ .id = LM3632_LDO_POS,
+ .ops = &lm363x_regulator_voltage_table_ops,
+ .n_voltages = LM3632_LDO_VSEL_MAX + 1,
+ .min_uV = LM3632_VLDO_MIN,
+ .uV_step = LM363X_STEP_50mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM3632_REG_VOUT_POS,
+ .vsel_mask = LM3632_VOUT_MASK,
+ .enable_reg = LM3632_REG_BIAS_CONFIG,
+ .enable_mask = LM3632_EN_VPOS_MASK,
+ },
+ {
+ .name = "ldo_vneg",
+ .id = LM3632_LDO_NEG,
+ .ops = &lm363x_regulator_voltage_table_ops,
+ .n_voltages = LM3632_LDO_VSEL_MAX + 1,
+ .min_uV = LM3632_VLDO_MIN,
+ .uV_step = LM363X_STEP_50mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM3632_REG_VOUT_NEG,
+ .vsel_mask = LM3632_VOUT_MASK,
+ .enable_reg = LM3632_REG_BIAS_CONFIG,
+ .enable_mask = LM3632_EN_VNEG_MASK,
+ },
+};
+
+static struct of_regulator_match lm363x_regulator_matches[] = {
+ [LM3631_BOOST] = { .name = "vboost" },
+ [LM3631_LDO_CONT] = { .name = "vcont" },
+ [LM3631_LDO_OREF] = { .name = "voref" },
+ [LM3631_LDO_POS] = { .name = "vpos" },
+ [LM3631_LDO_NEG] = { .name = "vneg" },
+ [LM3632_BOOST] = { .name = "vboost" },
+ [LM3632_LDO_POS] = { .name = "vpos" },
+ [LM3632_LDO_NEG] = { .name = "vneg" },
+};
+
+static struct regulator_init_data *
+lm363x_regulator_of_get_init_data(struct device *dev,
+ struct lm363x_regulator *lm363x_regulator, int id)
+{
+ struct device_node *np = dev->of_node;
+ int count;
+
+ count = of_regulator_match(dev, np, &lm363x_regulator_matches[id], 1);
+ if (count <= 0)
+ return ERR_PTR(-ENODEV);
+
+ return lm363x_regulator_matches[id].init_data;
+}
+
+static int lm363x_regulator_of_get_enable_gpio(struct device *dev, int id)
+{
+ struct device_node *np = dev->of_node;
+ int gpio = -1;
+
+ /*
+ * Check LCM_EN1/2_GPIO is configured.
+ * Those pins are used for enabling VPOS/VNEG LDOs.
+ */
+ if (id == LM3632_LDO_POS)
+ gpio = of_get_named_gpio(np, "ti,lcm-en1-gpio", 0);
+ else if (id == LM3632_LDO_NEG)
+ gpio = of_get_named_gpio(np, "ti,lcm-en2-gpio", 0);
+
+ return gpio;
+}
+
+static int lm363x_regulator_probe(struct platform_device *pdev)
+{
+ struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent);
+ struct lm363x_regulator *lm363x_regulator;
+ struct regulator_init_data *init_data;
+ struct regulator_config cfg = { };
+ struct regulator_dev *rdev;
+ struct device *dev = &pdev->dev;
+ int id = pdev->id;
+ int ret, ena_gpio;
+
+ lm363x_regulator = devm_kzalloc(dev, sizeof(*lm363x_regulator),
+ GFP_KERNEL);
+ if (!lm363x_regulator)
+ return -ENOMEM;
+
+ lm363x_regulator->lmu = lmu;
+
+ init_data = lm363x_regulator_of_get_init_data(dev, lm363x_regulator,
+ id);
+ if (IS_ERR(init_data))
+ return PTR_ERR(init_data);
+
+ cfg.dev = dev->parent;
+ cfg.init_data = init_data;
+ cfg.driver_data = lm363x_regulator;
+ cfg.regmap = lmu->regmap;
+
+ /*
+ * LM3632 LDOs can be controlled by external pin.
+ * Register update is required if the pin is used.
+ */
+ ena_gpio = lm363x_regulator_of_get_enable_gpio(dev, id);
+ if (gpio_is_valid(ena_gpio)) {
+ cfg.ena_gpio = ena_gpio;
+ cfg.ena_gpio_flags = GPIOF_OUT_INIT_LOW;
+
+ ret = ti_lmu_update_bits(lmu, LM3632_REG_BIAS_CONFIG,
+ LM3632_EXT_EN_MASK,
+ LM3632_EXT_EN_MASK);
+ if (ret) {
+ dev_err(dev, "External pin err: %d\n", ret);
+ return ret;
+ }
+ }
+
+ rdev = regulator_register(&lm363x_regulator_desc[id], &cfg);
+ if (IS_ERR(rdev)) {
+ ret = PTR_ERR(rdev);
+ dev_err(dev, "[%d] regulator register err: %d\n", id, ret);
+ return ret;
+ }
+
+ lm363x_regulator->regulator = rdev;
+ platform_set_drvdata(pdev, lm363x_regulator);
+
+ return 0;
+}
+
+static int lm363x_regulator_remove(struct platform_device *pdev)
+{
+ struct lm363x_regulator *lm363x_regulator = platform_get_drvdata(pdev);
+
+ regulator_unregister(lm363x_regulator->regulator);
+ return 0;
+}
+
+static const struct of_device_id lm363x_regulator_of_match[] = {
+ { .compatible = "ti,lm363x-regulator" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lm363x_regulator_of_match);
+
+static struct platform_driver lm363x_regulator_driver = {
+ .probe = lm363x_regulator_probe,
+ .remove = lm363x_regulator_remove,
+ .driver = {
+ .name = "lm363x-regulator",
+ .of_match_table = lm363x_regulator_of_match,
+ },
+};
+
+module_platform_driver(lm363x_regulator_driver);
+
+MODULE_DESCRIPTION("TI LM363X Regulator Driver");
+MODULE_AUTHOR("Milo Kim");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:lm363x-regulator");
--
1.9.1
next prev parent reply other threads:[~2015-11-02 5:26 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-02 5:24 [PATCH RESEND 00/16] Support TI LMU devices Milo Kim
2015-11-02 5:24 ` [PATCH RESEND 01/16] Documentation: dt-bindings: mfd: add TI LMU device binding information Milo Kim
2015-11-06 2:00 ` Rob Herring
2015-11-11 9:49 ` Lee Jones
2015-11-12 0:05 ` Kim, Milo
2015-11-02 5:24 ` [PATCH RESEND 02/16] Documentation: dt-bindings: backlight: add TI LMU backlight " Milo Kim
2015-11-02 15:02 ` Rob Herring
2015-11-03 7:13 ` Kim, Milo
2015-11-03 15:32 ` Rob Herring
2015-11-02 5:24 ` [PATCH RESEND 03/16] Documentation: dt-bindings: hwmon: add TI LMU HWMON " Milo Kim
2015-11-06 1:57 ` Rob Herring
2015-11-06 3:48 ` Kim, Milo
2015-11-02 5:24 ` [PATCH RESEND 04/16] Documentation: dt-bindings: leds: add LM3633 LED " Milo Kim
2015-11-03 16:15 ` Jacek Anaszewski
2015-11-10 7:01 ` Kim, Milo
2015-11-02 5:24 ` [PATCH RESEND 05/16] Documentation: dt-bindings: regulator: add LM363x regulator " Milo Kim
2015-11-02 5:24 ` [PATCH RESEND 06/16] mfd: add TI LMU driver Milo Kim
2015-11-23 10:30 ` Lee Jones
2015-11-24 2:35 ` Kim, Milo
2015-11-24 6:39 ` Kim, Milo
2015-11-24 8:18 ` Lee Jones
2015-11-25 8:10 ` Kim, Milo
2015-11-25 8:15 ` Lee Jones
2015-11-02 5:24 ` [PATCH RESEND 07/16] backlight: add TI LMU backlight common driver Milo Kim
2015-11-02 5:24 ` [PATCH RESEND 08/16] backlight: ti-lmu-backlight: add LM3532 driver Milo Kim
2015-11-02 5:37 ` kbuild test robot
2015-11-02 7:33 ` Kim, Milo
2015-11-02 5:24 ` [PATCH RESEND 09/16] backlight: ti-lmu-backlight: add LM3631 driver Milo Kim
2015-11-02 5:24 ` [PATCH RESEND 10/16] backlight: ti-lmu-backlight: add LM3632 driver Milo Kim
2015-11-02 5:24 ` [PATCH RESEND 11/16] backlight: ti-lmu-backlight: add LM3633 driver Milo Kim
2015-11-02 5:24 ` [PATCH RESEND 12/16] backlight: ti-lmu-backlight: add LM3695 driver Milo Kim
2015-11-02 5:24 ` [PATCH RESEND 13/16] backlight: ti-lmu-backlight: add LM3697 driver Milo Kim
2015-11-02 5:24 ` [PATCH RESEND 14/16] hwmon: add TI LMU hardware fault monitoring driver Milo Kim
2015-11-02 14:27 ` Guenter Roeck
2015-11-03 7:01 ` Kim, Milo
2015-11-02 5:24 ` [PATCH RESEND 15/16] leds: add LM3633 driver Milo Kim
2015-11-03 16:15 ` Jacek Anaszewski
2015-11-10 7:38 ` Kim, Milo
2015-11-10 13:44 ` Jacek Anaszewski
2015-11-11 2:16 ` Kim, Milo
2015-11-12 9:04 ` Jacek Anaszewski
2015-11-20 9:22 ` Jacek Anaszewski
2015-11-22 23:40 ` Kim, Milo
2015-11-23 11:17 ` Jacek Anaszewski
2015-11-02 5:24 ` Milo Kim [this message]
2015-11-02 12:26 ` [PATCH RESEND 16/16] regulator: add LM363X driver Mark Brown
2015-11-03 6:59 ` Kim, Milo
2015-11-04 13:59 ` Mark Brown
2015-11-10 7:54 ` Kim, Milo
2015-11-02 8:59 ` [PATCH RESEND 00/16] Support TI LMU devices Lee Jones
2015-11-03 6:52 ` Kim, Milo
2015-11-03 8:33 ` Lee Jones
2015-11-03 9:08 ` Kim, Milo
2015-11-25 8:51 ` Kim, Milo
2015-11-25 9:05 ` Lee Jones
2015-11-02 9:00 ` Lee Jones
2015-11-03 6:56 ` Kim, Milo
2015-11-03 8:35 ` Lee Jones
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