ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/regulator/max14577-regulator.c b/marvell/linux/drivers/regulator/max14577-regulator.c
new file mode 100644
index 0000000..07a150c
--- /dev/null
+++ b/marvell/linux/drivers/regulator/max14577-regulator.c
@@ -0,0 +1,271 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// max14577.c - Regulator driver for the Maxim 14577/77836
+//
+// Copyright (C) 2013,2014 Samsung Electronics
+// Krzysztof Kozlowski <krzk@kernel.org>
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/mfd/max14577.h>
+#include <linux/mfd/max14577-private.h>
+#include <linux/regulator/of_regulator.h>
+
+static int max14577_reg_is_enabled(struct regulator_dev *rdev)
+{
+ int rid = rdev_get_id(rdev);
+ struct regmap *rmap = rdev->regmap;
+ u8 reg_data;
+
+ switch (rid) {
+ case MAX14577_CHARGER:
+ max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, ®_data);
+ if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0)
+ return 0;
+ max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, ®_data);
+ if ((reg_data & STATUS3_CGMBC_MASK) == 0)
+ return 0;
+ /* MBCHOSTEN and CGMBC are on */
+ return 1;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int max14577_reg_get_current_limit(struct regulator_dev *rdev)
+{
+ u8 reg_data;
+ struct regmap *rmap = rdev->regmap;
+ struct max14577 *max14577 = rdev_get_drvdata(rdev);
+ const struct maxim_charger_current *limits =
+ &maxim_charger_currents[max14577->dev_type];
+
+ if (rdev_get_id(rdev) != MAX14577_CHARGER)
+ return -EINVAL;
+
+ max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL4, ®_data);
+
+ if ((reg_data & CHGCTRL4_MBCICHWRCL_MASK) == 0)
+ return limits->min;
+
+ reg_data = ((reg_data & CHGCTRL4_MBCICHWRCH_MASK) >>
+ CHGCTRL4_MBCICHWRCH_SHIFT);
+ return limits->high_start + reg_data * limits->high_step;
+}
+
+static int max14577_reg_set_current_limit(struct regulator_dev *rdev,
+ int min_uA, int max_uA)
+{
+ u8 reg_data;
+ int ret;
+ struct max14577 *max14577 = rdev_get_drvdata(rdev);
+ const struct maxim_charger_current *limits =
+ &maxim_charger_currents[max14577->dev_type];
+
+ if (rdev_get_id(rdev) != MAX14577_CHARGER)
+ return -EINVAL;
+
+ ret = maxim_charger_calc_reg_current(limits, min_uA, max_uA, ®_data);
+ if (ret)
+ return ret;
+
+ return max14577_update_reg(rdev->regmap, MAX14577_CHG_REG_CHG_CTRL4,
+ CHGCTRL4_MBCICHWRCL_MASK | CHGCTRL4_MBCICHWRCH_MASK,
+ reg_data);
+}
+
+static const struct regulator_ops max14577_safeout_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .list_voltage = regulator_list_voltage_linear,
+};
+
+static const struct regulator_ops max14577_charger_ops = {
+ .is_enabled = max14577_reg_is_enabled,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .get_current_limit = max14577_reg_get_current_limit,
+ .set_current_limit = max14577_reg_set_current_limit,
+};
+
+#define MAX14577_SAFEOUT_REG { \
+ .name = "SAFEOUT", \
+ .of_match = of_match_ptr("SAFEOUT"), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .id = MAX14577_SAFEOUT, \
+ .ops = &max14577_safeout_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .n_voltages = 1, \
+ .min_uV = MAX14577_REGULATOR_SAFEOUT_VOLTAGE, \
+ .enable_reg = MAX14577_REG_CONTROL2, \
+ .enable_mask = CTRL2_SFOUTORD_MASK, \
+}
+#define MAX14577_CHARGER_REG { \
+ .name = "CHARGER", \
+ .of_match = of_match_ptr("CHARGER"), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .id = MAX14577_CHARGER, \
+ .ops = &max14577_charger_ops, \
+ .type = REGULATOR_CURRENT, \
+ .owner = THIS_MODULE, \
+ .enable_reg = MAX14577_CHG_REG_CHG_CTRL2, \
+ .enable_mask = CHGCTRL2_MBCHOSTEN_MASK, \
+}
+
+static const struct regulator_desc max14577_supported_regulators[] = {
+ [MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG,
+ [MAX14577_CHARGER] = MAX14577_CHARGER_REG,
+};
+
+static const struct regulator_ops max77836_ldo_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ /* TODO: add .set_suspend_mode */
+};
+
+#define MAX77836_LDO_REG(num) { \
+ .name = "LDO" # num, \
+ .of_match = of_match_ptr("LDO" # num), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .id = MAX77836_LDO ## num, \
+ .ops = &max77836_ldo_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .n_voltages = MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM, \
+ .min_uV = MAX77836_REGULATOR_LDO_VOLTAGE_MIN, \
+ .uV_step = MAX77836_REGULATOR_LDO_VOLTAGE_STEP, \
+ .enable_reg = MAX77836_LDO_REG_CNFG1_LDO ## num, \
+ .enable_mask = MAX77836_CNFG1_LDO_PWRMD_MASK, \
+ .vsel_reg = MAX77836_LDO_REG_CNFG1_LDO ## num, \
+ .vsel_mask = MAX77836_CNFG1_LDO_TV_MASK, \
+}
+
+static const struct regulator_desc max77836_supported_regulators[] = {
+ [MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG,
+ [MAX14577_CHARGER] = MAX14577_CHARGER_REG,
+ [MAX77836_LDO1] = MAX77836_LDO_REG(1),
+ [MAX77836_LDO2] = MAX77836_LDO_REG(2),
+};
+
+/**
+ * Registers for regulators of max77836 use different I2C slave addresses so
+ * different regmaps must be used for them.
+ *
+ * Returns proper regmap for accessing regulator passed by id.
+ */
+static struct regmap *max14577_get_regmap(struct max14577 *max14577,
+ int reg_id)
+{
+ switch (max14577->dev_type) {
+ case MAXIM_DEVICE_TYPE_MAX77836:
+ switch (reg_id) {
+ case MAX77836_SAFEOUT ... MAX77836_CHARGER:
+ return max14577->regmap;
+ default:
+ /* MAX77836_LDO1 ... MAX77836_LDO2 */
+ return max14577->regmap_pmic;
+ }
+
+ case MAXIM_DEVICE_TYPE_MAX14577:
+ default:
+ return max14577->regmap;
+ }
+}
+
+static int max14577_regulator_probe(struct platform_device *pdev)
+{
+ struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
+ struct max14577_platform_data *pdata = dev_get_platdata(max14577->dev);
+ int i, ret = 0;
+ struct regulator_config config = {};
+ const struct regulator_desc *supported_regulators;
+ unsigned int supported_regulators_size;
+ enum maxim_device_type dev_type = max14577->dev_type;
+
+ switch (dev_type) {
+ case MAXIM_DEVICE_TYPE_MAX77836:
+ supported_regulators = max77836_supported_regulators;
+ supported_regulators_size = ARRAY_SIZE(max77836_supported_regulators);
+ break;
+ case MAXIM_DEVICE_TYPE_MAX14577:
+ default:
+ supported_regulators = max14577_supported_regulators;
+ supported_regulators_size = ARRAY_SIZE(max14577_supported_regulators);
+ }
+
+ config.dev = max14577->dev;
+ config.driver_data = max14577;
+
+ for (i = 0; i < supported_regulators_size; i++) {
+ struct regulator_dev *regulator;
+ /*
+ * Index of supported_regulators[] is also the id and must
+ * match index of pdata->regulators[].
+ */
+ if (pdata && pdata->regulators) {
+ config.init_data = pdata->regulators[i].initdata;
+ config.of_node = pdata->regulators[i].of_node;
+ }
+ config.regmap = max14577_get_regmap(max14577,
+ supported_regulators[i].id);
+
+ regulator = devm_regulator_register(&pdev->dev,
+ &supported_regulators[i], &config);
+ if (IS_ERR(regulator)) {
+ ret = PTR_ERR(regulator);
+ dev_err(&pdev->dev,
+ "Regulator init failed for %d/%s with error: %d\n",
+ i, supported_regulators[i].name, ret);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static const struct platform_device_id max14577_regulator_id[] = {
+ { "max14577-regulator", MAXIM_DEVICE_TYPE_MAX14577, },
+ { "max77836-regulator", MAXIM_DEVICE_TYPE_MAX77836, },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, max14577_regulator_id);
+
+static struct platform_driver max14577_regulator_driver = {
+ .driver = {
+ .name = "max14577-regulator",
+ },
+ .probe = max14577_regulator_probe,
+ .id_table = max14577_regulator_id,
+};
+
+static int __init max14577_regulator_init(void)
+{
+ BUILD_BUG_ON(ARRAY_SIZE(max14577_supported_regulators) != MAX14577_REGULATOR_NUM);
+ BUILD_BUG_ON(ARRAY_SIZE(max77836_supported_regulators) != MAX77836_REGULATOR_NUM);
+
+ BUILD_BUG_ON(MAX77836_REGULATOR_LDO_VOLTAGE_MIN +
+ (MAX77836_REGULATOR_LDO_VOLTAGE_STEP *
+ (MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM - 1)) !=
+ MAX77836_REGULATOR_LDO_VOLTAGE_MAX);
+
+ return platform_driver_register(&max14577_regulator_driver);
+}
+subsys_initcall(max14577_regulator_init);
+
+static void __exit max14577_regulator_exit(void)
+{
+ platform_driver_unregister(&max14577_regulator_driver);
+}
+module_exit(max14577_regulator_exit);
+
+MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
+MODULE_DESCRIPTION("Maxim 14577/77836 regulator driver");
+MODULE_LICENSE("GPL");