ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/regulator/max8925-regulator.c b/marvell/linux/drivers/regulator/max8925-regulator.c
new file mode 100644
index 0000000..d953b6b
--- /dev/null
+++ b/marvell/linux/drivers/regulator/max8925-regulator.c
@@ -0,0 +1,285 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Regulators driver for Maxim max8925
+ *
+ * Copyright (C) 2009 Marvell International Ltd.
+ * Haojian Zhuang <haojian.zhuang@marvell.com>
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/max8925.h>
+#include <linux/of.h>
+#include <linux/regulator/of_regulator.h>
+
+#define SD1_DVM_VMIN 850000
+#define SD1_DVM_VMAX 1000000
+#define SD1_DVM_STEP 50000
+#define SD1_DVM_SHIFT 5 /* SDCTL1 bit5 */
+#define SD1_DVM_EN 6 /* SDV1 bit 6 */
+
+/* bit definitions in LDO control registers */
+#define LDO_SEQ_I2C 0x7 /* Power U/D by i2c */
+#define LDO_SEQ_MASK 0x7 /* Power U/D sequence mask */
+#define LDO_SEQ_SHIFT 2 /* Power U/D sequence offset */
+#define LDO_I2C_EN 0x1 /* Enable by i2c */
+#define LDO_I2C_EN_MASK 0x1 /* Enable mask by i2c */
+#define LDO_I2C_EN_SHIFT 0 /* Enable offset by i2c */
+
+struct max8925_regulator_info {
+ struct regulator_desc desc;
+ struct i2c_client *i2c;
+
+ int vol_reg;
+ int enable_reg;
+};
+
+static int max8925_set_voltage_sel(struct regulator_dev *rdev,
+ unsigned int selector)
+{
+ struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
+ unsigned char mask = rdev->desc->n_voltages - 1;
+
+ return max8925_set_bits(info->i2c, info->vol_reg, mask, selector);
+}
+
+static int max8925_get_voltage_sel(struct regulator_dev *rdev)
+{
+ struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
+ unsigned char data, mask;
+ int ret;
+
+ ret = max8925_reg_read(info->i2c, info->vol_reg);
+ if (ret < 0)
+ return ret;
+ mask = rdev->desc->n_voltages - 1;
+ data = ret & mask;
+
+ return data;
+}
+
+static int max8925_enable(struct regulator_dev *rdev)
+{
+ struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
+
+ return max8925_set_bits(info->i2c, info->enable_reg,
+ LDO_SEQ_MASK << LDO_SEQ_SHIFT |
+ LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
+ LDO_SEQ_I2C << LDO_SEQ_SHIFT |
+ LDO_I2C_EN << LDO_I2C_EN_SHIFT);
+}
+
+static int max8925_disable(struct regulator_dev *rdev)
+{
+ struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
+
+ return max8925_set_bits(info->i2c, info->enable_reg,
+ LDO_SEQ_MASK << LDO_SEQ_SHIFT |
+ LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
+ LDO_SEQ_I2C << LDO_SEQ_SHIFT);
+}
+
+static int max8925_is_enabled(struct regulator_dev *rdev)
+{
+ struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
+ int ldo_seq, ret;
+
+ ret = max8925_reg_read(info->i2c, info->enable_reg);
+ if (ret < 0)
+ return ret;
+ ldo_seq = (ret >> LDO_SEQ_SHIFT) & LDO_SEQ_MASK;
+ if (ldo_seq != LDO_SEQ_I2C)
+ return 1;
+ else
+ return ret & (LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT);
+}
+
+static int max8925_set_dvm_voltage(struct regulator_dev *rdev, int uV)
+{
+ struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
+ unsigned char data, mask;
+
+ if (uV < SD1_DVM_VMIN || uV > SD1_DVM_VMAX)
+ return -EINVAL;
+
+ data = DIV_ROUND_UP(uV - SD1_DVM_VMIN, SD1_DVM_STEP);
+ data <<= SD1_DVM_SHIFT;
+ mask = 3 << SD1_DVM_SHIFT;
+
+ return max8925_set_bits(info->i2c, info->enable_reg, mask, data);
+}
+
+static int max8925_set_dvm_enable(struct regulator_dev *rdev)
+{
+ struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
+
+ return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN,
+ 1 << SD1_DVM_EN);
+}
+
+static int max8925_set_dvm_disable(struct regulator_dev *rdev)
+{
+ struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
+
+ return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN, 0);
+}
+
+static const struct regulator_ops max8925_regulator_sdv_ops = {
+ .map_voltage = regulator_map_voltage_linear,
+ .list_voltage = regulator_list_voltage_linear,
+ .set_voltage_sel = max8925_set_voltage_sel,
+ .get_voltage_sel = max8925_get_voltage_sel,
+ .enable = max8925_enable,
+ .disable = max8925_disable,
+ .is_enabled = max8925_is_enabled,
+ .set_suspend_voltage = max8925_set_dvm_voltage,
+ .set_suspend_enable = max8925_set_dvm_enable,
+ .set_suspend_disable = max8925_set_dvm_disable,
+};
+
+static const struct regulator_ops max8925_regulator_ldo_ops = {
+ .map_voltage = regulator_map_voltage_linear,
+ .list_voltage = regulator_list_voltage_linear,
+ .set_voltage_sel = max8925_set_voltage_sel,
+ .get_voltage_sel = max8925_get_voltage_sel,
+ .enable = max8925_enable,
+ .disable = max8925_disable,
+ .is_enabled = max8925_is_enabled,
+};
+
+#define MAX8925_SDV(_id, min, max, step) \
+{ \
+ .desc = { \
+ .name = "SDV" #_id, \
+ .of_match = of_match_ptr("SDV" #_id), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .ops = &max8925_regulator_sdv_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = MAX8925_ID_SD##_id, \
+ .owner = THIS_MODULE, \
+ .n_voltages = 64, \
+ .min_uV = min * 1000, \
+ .uV_step = step * 1000, \
+ }, \
+ .vol_reg = MAX8925_SDV##_id, \
+ .enable_reg = MAX8925_SDCTL##_id, \
+}
+
+#define MAX8925_LDO(_id, min, max, step) \
+{ \
+ .desc = { \
+ .name = "LDO" #_id, \
+ .of_match = of_match_ptr("LDO" #_id), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .ops = &max8925_regulator_ldo_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = MAX8925_ID_LDO##_id, \
+ .owner = THIS_MODULE, \
+ .n_voltages = 64, \
+ .min_uV = min * 1000, \
+ .uV_step = step * 1000, \
+ }, \
+ .vol_reg = MAX8925_LDOVOUT##_id, \
+ .enable_reg = MAX8925_LDOCTL##_id, \
+}
+
+static struct max8925_regulator_info max8925_regulator_info[] = {
+ MAX8925_SDV(1, 637.5, 1425, 12.5),
+ MAX8925_SDV(2, 650, 2225, 25),
+ MAX8925_SDV(3, 750, 3900, 50),
+
+ MAX8925_LDO(1, 750, 3900, 50),
+ MAX8925_LDO(2, 650, 2250, 25),
+ MAX8925_LDO(3, 650, 2250, 25),
+ MAX8925_LDO(4, 750, 3900, 50),
+ MAX8925_LDO(5, 750, 3900, 50),
+ MAX8925_LDO(6, 750, 3900, 50),
+ MAX8925_LDO(7, 750, 3900, 50),
+ MAX8925_LDO(8, 750, 3900, 50),
+ MAX8925_LDO(9, 750, 3900, 50),
+ MAX8925_LDO(10, 750, 3900, 50),
+ MAX8925_LDO(11, 750, 3900, 50),
+ MAX8925_LDO(12, 750, 3900, 50),
+ MAX8925_LDO(13, 750, 3900, 50),
+ MAX8925_LDO(14, 750, 3900, 50),
+ MAX8925_LDO(15, 750, 3900, 50),
+ MAX8925_LDO(16, 750, 3900, 50),
+ MAX8925_LDO(17, 650, 2250, 25),
+ MAX8925_LDO(18, 650, 2250, 25),
+ MAX8925_LDO(19, 750, 3900, 50),
+ MAX8925_LDO(20, 750, 3900, 50),
+};
+
+static int max8925_regulator_probe(struct platform_device *pdev)
+{
+ struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
+ struct regulator_init_data *pdata = dev_get_platdata(&pdev->dev);
+ struct regulator_config config = { };
+ struct max8925_regulator_info *ri;
+ struct resource *res;
+ struct regulator_dev *rdev;
+ int i;
+
+ res = platform_get_resource(pdev, IORESOURCE_REG, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "No REG resource!\n");
+ return -EINVAL;
+ }
+ for (i = 0; i < ARRAY_SIZE(max8925_regulator_info); i++) {
+ ri = &max8925_regulator_info[i];
+ if (ri->vol_reg == res->start)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(max8925_regulator_info)) {
+ dev_err(&pdev->dev, "Failed to find regulator %llu\n",
+ (unsigned long long)res->start);
+ return -EINVAL;
+ }
+ ri->i2c = chip->i2c;
+
+ config.dev = chip->dev;
+ config.driver_data = ri;
+
+ if (pdata)
+ config.init_data = pdata;
+
+ rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev, "failed to register regulator %s\n",
+ ri->desc.name);
+ return PTR_ERR(rdev);
+ }
+
+ platform_set_drvdata(pdev, rdev);
+ return 0;
+}
+
+static struct platform_driver max8925_regulator_driver = {
+ .driver = {
+ .name = "max8925-regulator",
+ },
+ .probe = max8925_regulator_probe,
+};
+
+static int __init max8925_regulator_init(void)
+{
+ return platform_driver_register(&max8925_regulator_driver);
+}
+subsys_initcall(max8925_regulator_init);
+
+static void __exit max8925_regulator_exit(void)
+{
+ platform_driver_unregister(&max8925_regulator_driver);
+}
+module_exit(max8925_regulator_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
+MODULE_DESCRIPTION("Regulator Driver for Maxim 8925 PMIC");
+MODULE_ALIAS("platform:max8925-regulator");