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path: root/drivers/regulator/hi6421v600-regulator.c
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-rw-r--r--drivers/regulator/hi6421v600-regulator.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/drivers/regulator/hi6421v600-regulator.c b/drivers/regulator/hi6421v600-regulator.c
new file mode 100644
index 0000000000..4e10daa1e6
--- /dev/null
+++ b/drivers/regulator/hi6421v600-regulator.c
@@ -0,0 +1,295 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Device driver for regulators in Hisi IC
+//
+// Copyright (c) 2013 Linaro Ltd.
+// Copyright (c) 2011 HiSilicon Ltd.
+// Copyright (c) 2020-2021 Huawei Technologies Co., Ltd.
+//
+// Guodong Xu <guodong.xu@linaro.org>
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/spmi.h>
+
+struct hi6421_spmi_reg_priv {
+ /* Serialize regulator enable logic */
+ struct mutex enable_mutex;
+};
+
+struct hi6421_spmi_reg_info {
+ struct regulator_desc desc;
+ u8 eco_mode_mask;
+ u32 eco_uA;
+};
+
+static const unsigned int range_1v5_to_2v0[] = {
+ 1500000, 1550000, 1600000, 1650000,
+ 1700000, 1725000, 1750000, 1775000,
+ 1800000, 1825000, 1850000, 1875000,
+ 1900000, 1925000, 1950000, 2000000
+};
+
+static const unsigned int range_1v725_to_1v9[] = {
+ 1725000, 1750000, 1775000, 1800000,
+ 1825000, 1850000, 1875000, 1900000
+};
+
+static const unsigned int range_1v75_to_3v3[] = {
+ 1750000, 1800000, 1825000, 2800000,
+ 2850000, 2950000, 3000000, 3300000
+};
+
+static const unsigned int range_1v8_to_3v0[] = {
+ 1800000, 1850000, 2400000, 2600000,
+ 2700000, 2850000, 2950000, 3000000
+};
+
+static const unsigned int range_2v5_to_3v3[] = {
+ 2500000, 2600000, 2700000, 2800000,
+ 3000000, 3100000, 3200000, 3300000
+};
+
+static const unsigned int range_2v6_to_3v3[] = {
+ 2600000, 2700000, 2800000, 2900000,
+ 3000000, 3100000, 3200000, 3300000
+};
+
+/**
+ * HI6421V600_LDO() - specify a LDO power line
+ * @_id: LDO id name string
+ * @vtable: voltage table
+ * @ereg: enable register
+ * @emask: enable mask
+ * @vreg: voltage select register
+ * @odelay: off/on delay time in uS
+ * @etime: enable time in uS
+ * @ecomask: eco mode mask
+ * @ecoamp: eco mode load uppler limit in uA
+ */
+#define HI6421V600_LDO(_id, vtable, ereg, emask, vreg, \
+ odelay, etime, ecomask, ecoamp) \
+ [hi6421v600_##_id] = { \
+ .desc = { \
+ .name = #_id, \
+ .of_match = of_match_ptr(#_id), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .ops = &hi6421_spmi_ldo_rops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = hi6421v600_##_id, \
+ .owner = THIS_MODULE, \
+ .volt_table = vtable, \
+ .n_voltages = ARRAY_SIZE(vtable), \
+ .vsel_mask = ARRAY_SIZE(vtable) - 1, \
+ .vsel_reg = vreg, \
+ .enable_reg = ereg, \
+ .enable_mask = emask, \
+ .enable_time = etime, \
+ .ramp_delay = etime, \
+ .off_on_delay = odelay, \
+ }, \
+ .eco_mode_mask = ecomask, \
+ .eco_uA = ecoamp, \
+ }
+
+static int hi6421_spmi_regulator_enable(struct regulator_dev *rdev)
+{
+ struct hi6421_spmi_reg_priv *priv = rdev_get_drvdata(rdev);
+ int ret;
+
+ /* cannot enable more than one regulator at one time */
+ mutex_lock(&priv->enable_mutex);
+
+ ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask,
+ rdev->desc->enable_mask);
+
+ /* Avoid powering up multiple devices at the same time */
+ usleep_range(rdev->desc->off_on_delay, rdev->desc->off_on_delay + 60);
+
+ mutex_unlock(&priv->enable_mutex);
+
+ return ret;
+}
+
+static unsigned int hi6421_spmi_regulator_get_mode(struct regulator_dev *rdev)
+{
+ struct hi6421_spmi_reg_info *sreg;
+ unsigned int reg_val;
+
+ sreg = container_of(rdev->desc, struct hi6421_spmi_reg_info, desc);
+ regmap_read(rdev->regmap, rdev->desc->enable_reg, &reg_val);
+
+ if (reg_val & sreg->eco_mode_mask)
+ return REGULATOR_MODE_IDLE;
+
+ return REGULATOR_MODE_NORMAL;
+}
+
+static int hi6421_spmi_regulator_set_mode(struct regulator_dev *rdev,
+ unsigned int mode)
+{
+ struct hi6421_spmi_reg_info *sreg;
+ unsigned int val;
+
+ sreg = container_of(rdev->desc, struct hi6421_spmi_reg_info, desc);
+ switch (mode) {
+ case REGULATOR_MODE_NORMAL:
+ val = 0;
+ break;
+ case REGULATOR_MODE_IDLE:
+ if (!sreg->eco_mode_mask)
+ return -EINVAL;
+
+ val = sreg->eco_mode_mask;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ sreg->eco_mode_mask, val);
+}
+
+static unsigned int
+hi6421_spmi_regulator_get_optimum_mode(struct regulator_dev *rdev,
+ int input_uV, int output_uV,
+ int load_uA)
+{
+ struct hi6421_spmi_reg_info *sreg;
+
+ sreg = container_of(rdev->desc, struct hi6421_spmi_reg_info, desc);
+
+ if (!sreg->eco_uA || ((unsigned int)load_uA > sreg->eco_uA))
+ return REGULATOR_MODE_NORMAL;
+
+ return REGULATOR_MODE_IDLE;
+}
+
+static const struct regulator_ops hi6421_spmi_ldo_rops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = hi6421_spmi_regulator_enable,
+ .disable = regulator_disable_regmap,
+ .list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_ascend,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_mode = hi6421_spmi_regulator_get_mode,
+ .set_mode = hi6421_spmi_regulator_set_mode,
+ .get_optimum_mode = hi6421_spmi_regulator_get_optimum_mode,
+};
+
+/* HI6421v600 regulators with known registers */
+enum hi6421_spmi_regulator_id {
+ hi6421v600_ldo3,
+ hi6421v600_ldo4,
+ hi6421v600_ldo9,
+ hi6421v600_ldo15,
+ hi6421v600_ldo16,
+ hi6421v600_ldo17,
+ hi6421v600_ldo33,
+ hi6421v600_ldo34,
+};
+
+static struct hi6421_spmi_reg_info regulator_info[] = {
+ HI6421V600_LDO(ldo3, range_1v5_to_2v0,
+ 0x16, 0x01, 0x51,
+ 20000, 120,
+ 0, 0),
+ HI6421V600_LDO(ldo4, range_1v725_to_1v9,
+ 0x17, 0x01, 0x52,
+ 20000, 120,
+ 0x10, 10000),
+ HI6421V600_LDO(ldo9, range_1v75_to_3v3,
+ 0x1c, 0x01, 0x57,
+ 20000, 360,
+ 0x10, 10000),
+ HI6421V600_LDO(ldo15, range_1v8_to_3v0,
+ 0x21, 0x01, 0x5c,
+ 20000, 360,
+ 0x10, 10000),
+ HI6421V600_LDO(ldo16, range_1v8_to_3v0,
+ 0x22, 0x01, 0x5d,
+ 20000, 360,
+ 0x10, 10000),
+ HI6421V600_LDO(ldo17, range_2v5_to_3v3,
+ 0x23, 0x01, 0x5e,
+ 20000, 120,
+ 0x10, 10000),
+ HI6421V600_LDO(ldo33, range_2v5_to_3v3,
+ 0x32, 0x01, 0x6d,
+ 20000, 120,
+ 0, 0),
+ HI6421V600_LDO(ldo34, range_2v6_to_3v3,
+ 0x33, 0x01, 0x6e,
+ 20000, 120,
+ 0, 0),
+};
+
+static int hi6421_spmi_regulator_probe(struct platform_device *pdev)
+{
+ struct device *pmic_dev = pdev->dev.parent;
+ struct regulator_config config = { };
+ struct hi6421_spmi_reg_priv *priv;
+ struct hi6421_spmi_reg_info *info;
+ struct device *dev = &pdev->dev;
+ struct regmap *regmap;
+ struct regulator_dev *rdev;
+ int i;
+
+ /*
+ * This driver is meant to be called by hi6421-spmi-core,
+ * which should first set drvdata. If this doesn't happen, hit
+ * a warn on and return.
+ */
+ regmap = dev_get_drvdata(pmic_dev);
+ if (WARN_ON(!regmap))
+ return -ENODEV;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ mutex_init(&priv->enable_mutex);
+
+ for (i = 0; i < ARRAY_SIZE(regulator_info); i++) {
+ info = &regulator_info[i];
+
+ config.dev = pdev->dev.parent;
+ config.driver_data = priv;
+ config.regmap = regmap;
+
+ rdev = devm_regulator_register(dev, &info->desc, &config);
+ if (IS_ERR(rdev)) {
+ dev_err(dev, "failed to register %s\n",
+ info->desc.name);
+ return PTR_ERR(rdev);
+ }
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id hi6421_spmi_regulator_table[] = {
+ { .name = "hi6421v600-regulator" },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, hi6421_spmi_regulator_table);
+
+static struct platform_driver hi6421_spmi_regulator_driver = {
+ .id_table = hi6421_spmi_regulator_table,
+ .driver = {
+ .name = "hi6421v600-regulator",
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+ },
+ .probe = hi6421_spmi_regulator_probe,
+};
+module_platform_driver(hi6421_spmi_regulator_driver);
+
+MODULE_DESCRIPTION("Hi6421v600 SPMI regulator driver");
+MODULE_LICENSE("GPL v2");
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 10:18:38 +0000