+++ /dev/null
-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");
projects / openwrt / openwrt.git / blobdiff