Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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");
+