You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
403 lines
12 KiB
Diff
403 lines
12 KiB
Diff
From c3af279a9031b3375d3e5a684619c1adbbe30da9 Mon Sep 17 00:00:00 2001
|
|
From: Carlo Caione <carlo@caione.org>
|
|
Date: Sat, 1 Mar 2014 17:45:51 +0100
|
|
Subject: [PATCH] regulator: AXP20x: Add support for regulators subsystem
|
|
|
|
AXP202 and AXP209 come with two synchronous step-down DC-DCs and five
|
|
LDOs. This patch introduces basic support for those regulators.
|
|
|
|
Signed-off-by: Carlo Caione <carlo@caione.org>
|
|
---
|
|
arch/arm/configs/sunxi_defconfig | 1 +
|
|
drivers/regulator/Kconfig | 7 +
|
|
drivers/regulator/Makefile | 1 +
|
|
drivers/regulator/axp20x-regulator.c | 349 +++++++++++++++++++++++++++++++++++
|
|
4 files changed, 358 insertions(+)
|
|
create mode 100644 drivers/regulator/axp20x-regulator.c
|
|
|
|
--- a/arch/arm/configs/sunxi_defconfig
|
|
+++ b/arch/arm/configs/sunxi_defconfig
|
|
@@ -72,3 +72,4 @@ CONFIG_NFS_FS=y
|
|
CONFIG_ROOT_NFS=y
|
|
CONFIG_NLS=y
|
|
CONFIG_PRINTK_TIME=y
|
|
+CONFIG_REGULATOR_AXP20X=y
|
|
--- a/drivers/regulator/Kconfig
|
|
+++ b/drivers/regulator/Kconfig
|
|
@@ -139,6 +139,13 @@ config REGULATOR_AS3722
|
|
AS3722 PMIC. This will enable support for all the software
|
|
controllable DCDC/LDO regulators.
|
|
|
|
+config REGULATOR_AXP20X
|
|
+ tristate "X-POWERS AXP20X PMIC Regulators"
|
|
+ depends on MFD_AXP20X
|
|
+ help
|
|
+ This driver provides support for the voltage regulators on the
|
|
+ AXP20X PMIC.
|
|
+
|
|
config REGULATOR_DA903X
|
|
tristate "Dialog Semiconductor DA9030/DA9034 regulators"
|
|
depends on PMIC_DA903X
|
|
--- a/drivers/regulator/Makefile
|
|
+++ b/drivers/regulator/Makefile
|
|
@@ -20,6 +20,7 @@ obj-$(CONFIG_REGULATOR_ANATOP) += anatop
|
|
obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o arizona-ldo1.o
|
|
obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o
|
|
obj-$(CONFIG_REGULATOR_AS3722) += as3722-regulator.o
|
|
+obj-$(CONFIG_REGULATOR_AXP20X) += axp20x-regulator.o
|
|
obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
|
|
obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o
|
|
obj-$(CONFIG_REGULATOR_DA9055) += da9055-regulator.o
|
|
--- /dev/null
|
|
+++ b/drivers/regulator/axp20x-regulator.c
|
|
@@ -0,0 +1,349 @@
|
|
+/*
|
|
+ * axp20x regulators driver.
|
|
+ *
|
|
+ * Copyright (C) 2013 Carlo Caione <carlo@caione.org>
|
|
+ *
|
|
+ * This file is subject to the terms and conditions of the GNU General
|
|
+ * Public License. See the file "COPYING" in the main directory of this
|
|
+ * archive for more details.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
+ * GNU General Public License for more details.
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/init.h>
|
|
+#include <linux/err.h>
|
|
+#include <linux/platform_device.h>
|
|
+#include <linux/of.h>
|
|
+#include <linux/of_device.h>
|
|
+#include <linux/regulator/driver.h>
|
|
+#include <linux/regulator/of_regulator.h>
|
|
+#include <linux/mfd/axp20x.h>
|
|
+#include <linux/regmap.h>
|
|
+
|
|
+#define AXP20X_IO_ENABLED (0x03)
|
|
+
|
|
+#define AXP20X_WORKMODE_DCDC2_MASK BIT(2)
|
|
+#define AXP20X_WORKMODE_DCDC3_MASK BIT(1)
|
|
+
|
|
+#define AXP20X_FREQ_DCDC_MASK (0x0f)
|
|
+
|
|
+struct axp20x_regulators {
|
|
+ struct regulator_desc rdesc[AXP20X_REG_ID_MAX];
|
|
+ struct regulator_dev *rdev[AXP20X_REG_ID_MAX];
|
|
+ struct axp20x_dev *axp20x;
|
|
+};
|
|
+
|
|
+#define AXP20X_DESC(_id, _min, _max, _step, _vreg, _vmask, _ereg, _emask) \
|
|
+ [AXP20X_##_id] = { \
|
|
+ .name = #_id, \
|
|
+ .type = REGULATOR_VOLTAGE, \
|
|
+ .id = AXP20X_##_id, \
|
|
+ .n_voltages = (((_max) - (_min)) / (_step) + 1), \
|
|
+ .owner = THIS_MODULE, \
|
|
+ .min_uV = (_min) * 1000, \
|
|
+ .uV_step = (_step) * 1000, \
|
|
+ .vsel_reg = (_vreg), \
|
|
+ .vsel_mask = (_vmask), \
|
|
+ .enable_reg = (_ereg), \
|
|
+ .enable_mask = (_emask), \
|
|
+ .ops = &axp20x_ops, \
|
|
+ }
|
|
+
|
|
+#define AXP20X_DESC_IO(_id, _min, _max, _step, _vreg, _vmask, _ereg, _emask) \
|
|
+ [AXP20X_##_id] = { \
|
|
+ .name = #_id, \
|
|
+ .type = REGULATOR_VOLTAGE, \
|
|
+ .id = AXP20X_##_id, \
|
|
+ .n_voltages = (((_max) - (_min)) / (_step) + 1), \
|
|
+ .owner = THIS_MODULE, \
|
|
+ .min_uV = (_min) * 1000, \
|
|
+ .uV_step = (_step) * 1000, \
|
|
+ .vsel_reg = (_vreg), \
|
|
+ .vsel_mask = (_vmask), \
|
|
+ .enable_reg = (_ereg), \
|
|
+ .enable_mask = (_emask), \
|
|
+ .ops = &axp20x_ops_io, \
|
|
+ }
|
|
+
|
|
+#define AXP20X_DESC_FIXED(_id, _volt) \
|
|
+ [AXP20X_##_id] = { \
|
|
+ .name = #_id, \
|
|
+ .type = REGULATOR_VOLTAGE, \
|
|
+ .id = AXP20X_##_id, \
|
|
+ .n_voltages = 1, \
|
|
+ .owner = THIS_MODULE, \
|
|
+ .min_uV = (_volt) * 1000, \
|
|
+ .ops = &axp20x_ops, \
|
|
+ }
|
|
+
|
|
+#define AXP20X_DESC_TABLE(_id, _table, _vreg, _vmask, _ereg, _emask) \
|
|
+ [AXP20X_##_id] = { \
|
|
+ .name = #_id, \
|
|
+ .type = REGULATOR_VOLTAGE, \
|
|
+ .id = AXP20X_##_id, \
|
|
+ .n_voltages = ARRAY_SIZE(_table), \
|
|
+ .owner = THIS_MODULE, \
|
|
+ .vsel_reg = (_vreg), \
|
|
+ .vsel_mask = (_vmask), \
|
|
+ .enable_reg = (_ereg), \
|
|
+ .enable_mask = (_emask), \
|
|
+ .volt_table = (_table), \
|
|
+ .ops = &axp20x_ops_table, \
|
|
+ }
|
|
+
|
|
+static int axp20x_ldo4_data[] = { 1250000, 1300000, 1400000, 1500000, 1600000, 1700000,
|
|
+ 1800000, 1900000, 2000000, 2500000, 2700000, 2800000,
|
|
+ 3000000, 3100000, 3200000, 3300000 };
|
|
+
|
|
+static int axp20x_set_suspend_voltage(struct regulator_dev *rdev, int uV)
|
|
+{
|
|
+ return regulator_set_voltage_sel_regmap(rdev, 0);
|
|
+}
|
|
+
|
|
+static int axp20x_io_enable_regmap(struct regulator_dev *rdev)
|
|
+{
|
|
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
|
|
+ rdev->desc->enable_mask, AXP20X_IO_ENABLED);
|
|
+}
|
|
+
|
|
+static int axp109_io_is_enabled_regmap(struct regulator_dev *rdev)
|
|
+{
|
|
+ unsigned int val;
|
|
+ int ret;
|
|
+
|
|
+ ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
|
|
+ if (ret != 0)
|
|
+ return ret;
|
|
+
|
|
+ val &= rdev->desc->enable_mask;
|
|
+ return (val == AXP20X_IO_ENABLED);
|
|
+}
|
|
+
|
|
+static struct regulator_ops axp20x_ops_table = {
|
|
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
+ .list_voltage = regulator_list_voltage_table,
|
|
+ .enable = regulator_enable_regmap,
|
|
+ .disable = regulator_disable_regmap,
|
|
+ .is_enabled = regulator_is_enabled_regmap,
|
|
+ .set_suspend_enable = regulator_enable_regmap,
|
|
+ .set_suspend_disable = regulator_disable_regmap,
|
|
+ .set_suspend_voltage = axp20x_set_suspend_voltage,
|
|
+};
|
|
+
|
|
+
|
|
+static struct regulator_ops axp20x_ops = {
|
|
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
+ .list_voltage = regulator_list_voltage_linear,
|
|
+ .enable = regulator_enable_regmap,
|
|
+ .disable = regulator_disable_regmap,
|
|
+ .is_enabled = regulator_is_enabled_regmap,
|
|
+ .set_suspend_enable = regulator_enable_regmap,
|
|
+ .set_suspend_disable = regulator_disable_regmap,
|
|
+ .set_suspend_voltage = axp20x_set_suspend_voltage,
|
|
+};
|
|
+
|
|
+static struct regulator_ops axp20x_ops_io = {
|
|
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
+ .list_voltage = regulator_list_voltage_linear,
|
|
+ .enable = axp20x_io_enable_regmap,
|
|
+ .disable = regulator_disable_regmap,
|
|
+ .is_enabled = axp109_io_is_enabled_regmap,
|
|
+ .set_suspend_enable = regulator_enable_regmap,
|
|
+ .set_suspend_disable = regulator_disable_regmap,
|
|
+ .set_suspend_voltage = axp20x_set_suspend_voltage,
|
|
+};
|
|
+
|
|
+static struct regulator_desc axp20x_regulators[] = {
|
|
+ AXP20X_DESC(DCDC2, 700, 2275, 25, AXP20X_DCDC2_V_OUT, 0x3f,
|
|
+ AXP20X_PWR_OUT_CTRL, 0x10),
|
|
+ AXP20X_DESC(DCDC3, 700, 3500, 25, AXP20X_DCDC3_V_OUT, 0x7f,
|
|
+ AXP20X_PWR_OUT_CTRL, 0x02),
|
|
+ AXP20X_DESC_FIXED(LDO1, 1300),
|
|
+ AXP20X_DESC(LDO2, 1800, 3300, 100, AXP20X_LDO24_V_OUT, 0xf0,
|
|
+ AXP20X_PWR_OUT_CTRL, 0x04),
|
|
+ AXP20X_DESC(LDO3, 700, 3500, 25, AXP20X_LDO3_V_OUT, 0x7f,
|
|
+ AXP20X_PWR_OUT_CTRL, 0x40),
|
|
+ AXP20X_DESC_TABLE(LDO4, axp20x_ldo4_data, AXP20X_LDO24_V_OUT, 0x0f,
|
|
+ AXP20X_PWR_OUT_CTRL, 0x08),
|
|
+ AXP20X_DESC_IO(LDO5, 1800, 3300, 100, AXP20X_LDO5_V_OUT, 0xf0,
|
|
+ AXP20X_GPIO0_CTRL, 0x07),
|
|
+};
|
|
+
|
|
+#define AXP_MATCH(_name, _id) \
|
|
+ [AXP20X_##_id] = { \
|
|
+ .name = #_name, \
|
|
+ .driver_data = (void *) &axp20x_regulators[AXP20X_##_id], \
|
|
+ }
|
|
+
|
|
+static struct of_regulator_match axp20x_matches[] = {
|
|
+ AXP_MATCH(dcdc2, DCDC2),
|
|
+ AXP_MATCH(dcdc3, DCDC3),
|
|
+ AXP_MATCH(ldo1, LDO1),
|
|
+ AXP_MATCH(ldo2, LDO2),
|
|
+ AXP_MATCH(ldo3, LDO3),
|
|
+ AXP_MATCH(ldo4, LDO4),
|
|
+ AXP_MATCH(ldo5, LDO5),
|
|
+};
|
|
+
|
|
+static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
|
|
+{
|
|
+ struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
|
|
+
|
|
+ if (dcdcfreq < 750)
|
|
+ dcdcfreq = 750;
|
|
+
|
|
+ if (dcdcfreq > 1875)
|
|
+ dcdcfreq = 1875;
|
|
+
|
|
+ dcdcfreq = (dcdcfreq - 750) / 75;
|
|
+
|
|
+ return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ,
|
|
+ AXP20X_FREQ_DCDC_MASK, dcdcfreq);
|
|
+}
|
|
+
|
|
+static int axp20x_regulator_parse_dt(struct platform_device *pdev)
|
|
+{
|
|
+ struct device_node *np, *regulators;
|
|
+ int ret;
|
|
+ u32 dcdcfreq;
|
|
+
|
|
+ np = of_node_get(pdev->dev.parent->of_node);
|
|
+ if (!np)
|
|
+ return 0;
|
|
+
|
|
+ regulators = of_find_node_by_name(np, "regulators");
|
|
+ if (!regulators) {
|
|
+ dev_err(&pdev->dev, "regulators node not found\n");
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ ret = of_regulator_match(&pdev->dev, regulators, axp20x_matches,
|
|
+ ARRAY_SIZE(axp20x_matches));
|
|
+ if (ret < 0) {
|
|
+ dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
|
|
+ ret);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ dcdcfreq = 0x08;
|
|
+ of_property_read_u32(regulators, "dcdc-freq", &dcdcfreq);
|
|
+ ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
|
|
+ if (ret < 0) {
|
|
+ dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ of_node_put(regulators);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
|
|
+{
|
|
+ unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK;
|
|
+
|
|
+ if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
|
|
+ return -EINVAL;
|
|
+
|
|
+ if (id == AXP20X_DCDC3)
|
|
+ mask = AXP20X_WORKMODE_DCDC3_MASK;
|
|
+
|
|
+ return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
|
|
+}
|
|
+
|
|
+static int axp20x_regulator_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct axp20x_regulators *pmic;
|
|
+ struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
|
|
+ struct regulator_config config = { };
|
|
+ struct regulator_init_data *init_data;
|
|
+ int ret, i;
|
|
+ u32 workmode;
|
|
+
|
|
+ ret = axp20x_regulator_parse_dt(pdev);
|
|
+ if (ret)
|
|
+ return ret;
|
|
+
|
|
+ pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
|
|
+ if (!pmic) {
|
|
+ dev_err(&pdev->dev, "Failed to alloc pmic\n");
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ pmic->axp20x = axp20x;
|
|
+ memcpy(pmic->rdesc, axp20x_regulators, sizeof(pmic->rdesc));
|
|
+ platform_set_drvdata(pdev, pmic);
|
|
+
|
|
+ for (i = 0; i < AXP20X_REG_ID_MAX; i++) {
|
|
+ init_data = axp20x_matches[i].init_data;
|
|
+ if (!init_data)
|
|
+ continue;
|
|
+
|
|
+ config.dev = &pdev->dev;
|
|
+ config.init_data = init_data;
|
|
+ config.driver_data = pmic;
|
|
+ config.regmap = axp20x->regmap;
|
|
+ config.of_node = axp20x_matches[i].of_node;
|
|
+
|
|
+ pmic->rdev[i] = regulator_register(&pmic->rdesc[i], &config);
|
|
+ if (IS_ERR(pmic->rdev[i])) {
|
|
+ ret = PTR_ERR(pmic->rdev[i]);
|
|
+ dev_err(&pdev->dev, "Failed to register %s\n",
|
|
+ pmic->rdesc[i].name);
|
|
+
|
|
+ while (--i >= 0)
|
|
+ regulator_unregister(pmic->rdev[i]);
|
|
+
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ ret = of_property_read_u32(axp20x_matches[i].of_node, "dcdc-workmode",
|
|
+ &workmode);
|
|
+ if (!ret) {
|
|
+ ret = axp20x_set_dcdc_workmode(pmic->rdev[i], i, workmode);
|
|
+ if (ret)
|
|
+ dev_err(&pdev->dev, "Failed to set workmode on %s\n",
|
|
+ pmic->rdesc[i].name);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int axp20x_regulator_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct axp20x_regulators *pmic = platform_get_drvdata(pdev);
|
|
+ int i;
|
|
+
|
|
+ for (i = 0; i < AXP20X_REG_ID_MAX; i++)
|
|
+ regulator_unregister(pmic->rdev[i]);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct platform_driver axp20x_regulator_driver = {
|
|
+ .probe = axp20x_regulator_probe,
|
|
+ .remove = axp20x_regulator_remove,
|
|
+ .driver = {
|
|
+ .name = "axp20x-regulator",
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+};
|
|
+
|
|
+static int __init axp20x_regulator_init(void)
|
|
+{
|
|
+ return platform_driver_register(&axp20x_regulator_driver);
|
|
+}
|
|
+
|
|
+subsys_initcall(axp20x_regulator_init);
|
|
+
|
|
+MODULE_LICENSE("GPL v2");
|
|
+MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
|
|
+MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");
|