cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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88pg86x.c (2893B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/module.h>
      3#include <linux/i2c.h>
      4#include <linux/of.h>
      5#include <linux/regulator/driver.h>
      6#include <linux/regmap.h>
      7
      8static const struct regulator_ops pg86x_ops = {
      9	.set_voltage_sel = regulator_set_voltage_sel_regmap,
     10	.get_voltage_sel = regulator_get_voltage_sel_regmap,
     11	.list_voltage = regulator_list_voltage_linear_range,
     12};
     13
     14static const struct linear_range pg86x_buck1_ranges[] = {
     15	REGULATOR_LINEAR_RANGE(      0,  0, 10,     0),
     16	REGULATOR_LINEAR_RANGE(1000000, 11, 34, 25000),
     17	REGULATOR_LINEAR_RANGE(1600000, 35, 47, 50000),
     18};
     19
     20static const struct linear_range pg86x_buck2_ranges[] = {
     21	REGULATOR_LINEAR_RANGE(      0,  0, 15,     0),
     22	REGULATOR_LINEAR_RANGE(1000000, 16, 39, 25000),
     23	REGULATOR_LINEAR_RANGE(1600000, 40, 52, 50000),
     24};
     25
     26static const struct regulator_desc pg86x_regulators[] = {
     27	{
     28		.id = 0,
     29		.type = REGULATOR_VOLTAGE,
     30		.name = "buck1",
     31		.of_match = of_match_ptr("buck1"),
     32		.n_voltages = 11 + 24 + 13,
     33		.linear_ranges = pg86x_buck1_ranges,
     34		.n_linear_ranges = 3,
     35		.vsel_reg  = 0x24,
     36		.vsel_mask = 0xff,
     37		.ops = &pg86x_ops,
     38		.owner = THIS_MODULE
     39	},
     40	{
     41		.id = 1,
     42		.type = REGULATOR_VOLTAGE,
     43		.name = "buck2",
     44		.of_match = of_match_ptr("buck2"),
     45		.n_voltages = 16 + 24 + 13,
     46		.linear_ranges = pg86x_buck2_ranges,
     47		.n_linear_ranges = 3,
     48		.vsel_reg  = 0x13,
     49		.vsel_mask = 0xff,
     50		.ops = &pg86x_ops,
     51		.owner = THIS_MODULE
     52	},
     53};
     54
     55static const struct regmap_config pg86x_regmap = {
     56	.reg_bits = 8,
     57	.val_bits = 8,
     58};
     59
     60static int pg86x_i2c_probe(struct i2c_client *i2c)
     61{
     62	int id, ret;
     63	struct regulator_config config = {.dev = &i2c->dev};
     64	struct regmap *regmap = devm_regmap_init_i2c(i2c, &pg86x_regmap);
     65
     66	if (IS_ERR(regmap)) {
     67		ret = PTR_ERR(regmap);
     68		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
     69		return ret;
     70	}
     71
     72	for (id = 0; id < ARRAY_SIZE(pg86x_regulators); id++) {
     73		struct regulator_dev *rdev;
     74		rdev = devm_regulator_register(&i2c->dev,
     75					       &pg86x_regulators[id],
     76					       &config);
     77		if (IS_ERR(rdev)) {
     78			ret = PTR_ERR(rdev);
     79			dev_err(&i2c->dev, "failed to register %s: %d\n",
     80				pg86x_regulators[id].name, ret);
     81			return ret;
     82		}
     83	}
     84	return 0;
     85}
     86
     87static const struct of_device_id __maybe_unused pg86x_dt_ids[] = {
     88	{ .compatible = "marvell,88pg867" },
     89	{ .compatible = "marvell,88pg868" },
     90	{ }
     91};
     92MODULE_DEVICE_TABLE(of, pg86x_dt_ids);
     93
     94static const struct i2c_device_id pg86x_i2c_id[] = {
     95	{ "88pg867", },
     96	{ "88pg868", },
     97	{ }
     98};
     99MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id);
    100
    101static struct i2c_driver pg86x_regulator_driver = {
    102	.driver = {
    103		.name = "88pg86x",
    104		.of_match_table = of_match_ptr(pg86x_dt_ids),
    105	},
    106	.probe_new = pg86x_i2c_probe,
    107	.id_table = pg86x_i2c_id,
    108};
    109
    110module_i2c_driver(pg86x_regulator_driver);
    111
    112MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator");
    113MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>");
    114MODULE_LICENSE("GPL");