Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 241 insertions, 0 deletions

diff --git a/drivers/regulator/lp87565-regulator.c b/drivers/regulator/lp87565-regulator.c
new file mode 100644
index 000000000..7cd686240
--- /dev/null
+++ b/drivers/regulator/lp87565-regulator.c
@@ -0,0 +1,241 @@
+/*
+ * Regulator driver for LP87565 PMIC
+ *
+ * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation version 2. 
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/lp87565.h>
+
+#define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \
+			 _delay, _lr, _cr)				\
+	[_id] = {							\
+		.desc = {						\
+			.name			= _name,		\
+			.supply_name		= _of "-in",		\
+			.id			= _id,			\
+			.of_match		= of_match_ptr(_of),	\
+			.regulators_node	= of_match_ptr("regulators"),\
+			.ops			= &_ops,		\
+			.n_voltages		= _n,			\
+			.type			= REGULATOR_VOLTAGE,	\
+			.owner			= THIS_MODULE,		\
+			.vsel_reg		= _vr,			\
+			.vsel_mask		= _vm,			\
+			.enable_reg		= _er,			\
+			.enable_mask		= _em,			\
+			.ramp_delay		= _delay,		\
+			.linear_ranges		= _lr,			\
+			.n_linear_ranges	= ARRAY_SIZE(_lr),	\
+		},							\
+		.ctrl2_reg = _cr,					\
+	}
+
+struct lp87565_regulator {
+	struct regulator_desc desc;
+	unsigned int ctrl2_reg;
+};
+
+static const struct lp87565_regulator regulators[];
+
+static const struct regulator_linear_range buck0_1_2_3_ranges[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000),
+	REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
+	REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
+};
+
+static unsigned int lp87565_buck_ramp_delay[] = {
+	30000, 15000, 10000, 7500, 3800, 1900, 940, 470
+};
+
+/* LP87565 BUCK current limit */
+static const unsigned int lp87565_buck_uA[] = {
+	1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000,
+};
+
+static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev,
+				       int ramp_delay)
+{
+	int id = rdev_get_id(rdev);
+	struct lp87565 *lp87565 = rdev_get_drvdata(rdev);
+	unsigned int reg;
+	int ret;
+
+	if (ramp_delay <= 470)
+		reg = 7;
+	else if (ramp_delay <= 940)
+		reg = 6;
+	else if (ramp_delay <= 1900)
+		reg = 5;
+	else if (ramp_delay <= 3800)
+		reg = 4;
+	else if (ramp_delay <= 7500)
+		reg = 3;
+	else if (ramp_delay <= 10000)
+		reg = 2;
+	else if (ramp_delay <= 15000)
+		reg = 1;
+	else
+		reg = 0;
+
+	ret = regmap_update_bits(lp87565->regmap, regulators[id].ctrl2_reg,
+				 LP87565_BUCK_CTRL_2_SLEW_RATE,
+				 reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE));
+	if (ret) {
+		dev_err(lp87565->dev, "SLEW RATE write failed: %d\n", ret);
+		return ret;
+	}
+
+	rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg];
+
+	/* Conservatively give a 15% margin */
+	rdev->constraints->ramp_delay =
+				rdev->constraints->ramp_delay * 85 / 100;
+
+	return 0;
+}
+
+static int lp87565_buck_set_current_limit(struct regulator_dev *rdev,
+					  int min_uA, int max_uA)
+{
+	int id = rdev_get_id(rdev);
+	struct lp87565 *lp87565 = rdev_get_drvdata(rdev);
+	int i;
+
+	for (i = ARRAY_SIZE(lp87565_buck_uA) - 1; i >= 0; i--) {
+		if (lp87565_buck_uA[i] >= min_uA &&
+		    lp87565_buck_uA[i] <= max_uA)
+			return regmap_update_bits(lp87565->regmap,
+						  regulators[id].ctrl2_reg,
+						  LP87565_BUCK_CTRL_2_ILIM,
+						  i << __ffs(LP87565_BUCK_CTRL_2_ILIM));
+	}
+
+	return -EINVAL;
+}
+
+static int lp87565_buck_get_current_limit(struct regulator_dev *rdev)
+{
+	int id = rdev_get_id(rdev);
+	struct lp87565 *lp87565 = rdev_get_drvdata(rdev);
+	int ret;
+	unsigned int val;
+
+	ret = regmap_read(lp87565->regmap, regulators[id].ctrl2_reg, &val);
+	if (ret)
+		return ret;
+
+	val = (val & LP87565_BUCK_CTRL_2_ILIM) >>
+	       __ffs(LP87565_BUCK_CTRL_2_ILIM);
+
+	return (val < ARRAY_SIZE(lp87565_buck_uA)) ?
+			lp87565_buck_uA[val] : -EINVAL;
+}
+
+/* Operations permitted on BUCK0, BUCK1 */
+static struct regulator_ops lp87565_buck_ops = {
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.list_voltage		= regulator_list_voltage_linear_range,
+	.map_voltage		= regulator_map_voltage_linear_range,
+	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
+	.set_ramp_delay		= lp87565_buck_set_ramp_delay,
+	.set_current_limit	= lp87565_buck_set_current_limit,
+	.get_current_limit	= lp87565_buck_get_current_limit,
+};
+
+static const struct lp87565_regulator regulators[] = {
+	LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops,
+			  256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
+			  LP87565_REG_BUCK0_CTRL_1,
+			  LP87565_BUCK_CTRL_1_EN, 3230,
+			  buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
+	LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops,
+			  256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET,
+			  LP87565_REG_BUCK1_CTRL_1,
+			  LP87565_BUCK_CTRL_1_EN, 3230,
+			  buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2),
+	LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops,
+			  256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
+			  LP87565_REG_BUCK2_CTRL_1,
+			  LP87565_BUCK_CTRL_1_EN, 3230,
+			  buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
+	LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops,
+			  256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET,
+			  LP87565_REG_BUCK3_CTRL_1,
+			  LP87565_BUCK_CTRL_1_EN, 3230,
+			  buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2),
+	LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops,
+			  256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
+			  LP87565_REG_BUCK0_CTRL_1,
+			  LP87565_BUCK_CTRL_1_EN |
+			  LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
+			  buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
+	LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops,
+			  256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
+			  LP87565_REG_BUCK2_CTRL_1,
+			  LP87565_BUCK_CTRL_1_EN, 3230,
+			  buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
+};
+
+static int lp87565_regulator_probe(struct platform_device *pdev)
+{
+	struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent);
+	struct regulator_config config = { };
+	struct regulator_dev *rdev;
+	int i, min_idx = LP87565_BUCK_0, max_idx = LP87565_BUCK_3;
+
+	platform_set_drvdata(pdev, lp87565);
+
+	config.dev = &pdev->dev;
+	config.dev->of_node = lp87565->dev->of_node;
+	config.driver_data = lp87565;
+	config.regmap = lp87565->regmap;
+
+	if (lp87565->dev_type == LP87565_DEVICE_TYPE_LP87565_Q1) {
+		min_idx = LP87565_BUCK_10;
+		max_idx = LP87565_BUCK_23;
+	}
+
+	for (i = min_idx; i <= max_idx; i++) {
+		rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
+					       &config);
+		if (IS_ERR(rdev)) {
+			dev_err(lp87565->dev, "failed to register %s regulator\n",
+				pdev->name);
+			return PTR_ERR(rdev);
+		}
+	}
+
+	return 0;
+}
+
+static const struct platform_device_id lp87565_regulator_id_table[] = {
+	{ "lp87565-regulator", },
+	{ "lp87565-q1-regulator", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table);
+
+static struct platform_driver lp87565_regulator_driver = {
+	.driver = {
+		.name = "lp87565-pmic",
+	},
+	.probe = lp87565_regulator_probe,
+	.id_table = lp87565_regulator_id_table,
+};
+module_platform_driver(lp87565_regulator_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("LP87565 voltage regulator driver");
+MODULE_LICENSE("GPL v2");