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c4b02c92d9
Since commit 0166dc11be ("of: make CONFIG_OF user selectable"), it
is possible to test-build any driver which depends on OF on any
architecture by explicitly selecting OF. Therefore depending on
COMPILE_TEST as an alternative is no longer needed.
It is actually better to always build such drivers with OF enabled,
so that the test builds are closer to how each driver will actually be
built on its intended target. Building them without OF may not test
much as the compiler will optimize out potentially large parts of the
code. In the worst case, this could even pop false positive warnings.
Dropping COMPILE_TEST here improves the quality of our testing and
avoids wasting time on non-existent issues.
As a minor optimization, this also lets us drop several occurrences of
of_match_ptr(), __maybe_unused and some ifdef guarding, as we now know
what all of this will resolve to, we might as well save cpp some work.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Icenowy Zheng <icenowy@aosc.io>
Link: https://lore.kernel.org/r/20221124144708.64371b98@endymion.delvare
Signed-off-by: Mark Brown <broonie@kernel.org>
152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// sy8106a-regulator.c - Regulator device driver for SY8106A
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//
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// Copyright (C) 2016 Ondřej Jirman <megous@megous.com>
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// Copyright (c) 2017-2018 Icenowy Zheng <icenowy@aosc.io>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/of_regulator.h>
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#define SY8106A_REG_VOUT1_SEL 0x01
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#define SY8106A_REG_VOUT_COM 0x02
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#define SY8106A_REG_VOUT1_SEL_MASK 0x7f
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#define SY8106A_DISABLE_REG BIT(0)
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/*
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* The I2C controlled voltage will only work when this bit is set; otherwise
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* it will behave like a fixed regulator.
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*/
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#define SY8106A_GO_BIT BIT(7)
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static const struct regmap_config sy8106a_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static const struct regulator_ops sy8106a_ops = {
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.set_voltage_time_sel = regulator_set_voltage_time_sel,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.list_voltage = regulator_list_voltage_linear,
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/* Enabling/disabling the regulator is not yet implemented */
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};
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/* Default limits measured in millivolts */
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#define SY8106A_MIN_MV 680
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#define SY8106A_MAX_MV 1950
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#define SY8106A_STEP_MV 10
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static const struct regulator_desc sy8106a_reg = {
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.name = "SY8106A",
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.id = 0,
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.ops = &sy8106a_ops,
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.type = REGULATOR_VOLTAGE,
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.n_voltages = ((SY8106A_MAX_MV - SY8106A_MIN_MV) / SY8106A_STEP_MV) + 1,
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.min_uV = (SY8106A_MIN_MV * 1000),
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.uV_step = (SY8106A_STEP_MV * 1000),
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.vsel_reg = SY8106A_REG_VOUT1_SEL,
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.vsel_mask = SY8106A_REG_VOUT1_SEL_MASK,
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/*
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* This ramp_delay is a conservative default value which works on
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* H3/H5 boards VDD-CPUX situations.
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*/
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.ramp_delay = 200,
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.owner = THIS_MODULE,
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};
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/*
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* I2C driver interface functions
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*/
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static int sy8106a_i2c_probe(struct i2c_client *i2c)
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{
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struct device *dev = &i2c->dev;
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struct regulator_dev *rdev;
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struct regulator_config config = { };
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struct regmap *regmap;
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unsigned int reg, vsel;
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u32 fixed_voltage;
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int error;
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error = of_property_read_u32(dev->of_node, "silergy,fixed-microvolt",
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&fixed_voltage);
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if (error)
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return error;
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if (fixed_voltage < SY8106A_MIN_MV * 1000 ||
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fixed_voltage > SY8106A_MAX_MV * 1000)
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return -EINVAL;
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regmap = devm_regmap_init_i2c(i2c, &sy8106a_regmap_config);
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if (IS_ERR(regmap)) {
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error = PTR_ERR(regmap);
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dev_err(dev, "Failed to allocate register map: %d\n", error);
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return error;
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}
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config.dev = &i2c->dev;
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config.regmap = regmap;
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config.of_node = dev->of_node;
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config.init_data = of_get_regulator_init_data(dev, dev->of_node,
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&sy8106a_reg);
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if (!config.init_data)
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return -ENOMEM;
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/* Ensure GO_BIT is enabled when probing */
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error = regmap_read(regmap, SY8106A_REG_VOUT1_SEL, ®);
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if (error)
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return error;
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if (!(reg & SY8106A_GO_BIT)) {
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vsel = (fixed_voltage / 1000 - SY8106A_MIN_MV) /
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SY8106A_STEP_MV;
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error = regmap_write(regmap, SY8106A_REG_VOUT1_SEL,
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vsel | SY8106A_GO_BIT);
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if (error)
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return error;
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}
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/* Probe regulator */
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rdev = devm_regulator_register(&i2c->dev, &sy8106a_reg, &config);
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if (IS_ERR(rdev)) {
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error = PTR_ERR(rdev);
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dev_err(&i2c->dev, "Failed to register SY8106A regulator: %d\n", error);
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return error;
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}
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return 0;
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}
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static const struct of_device_id sy8106a_i2c_of_match[] = {
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{ .compatible = "silergy,sy8106a" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, sy8106a_i2c_of_match);
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static const struct i2c_device_id sy8106a_i2c_id[] = {
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{ "sy8106a", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, sy8106a_i2c_id);
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static struct i2c_driver sy8106a_regulator_driver = {
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.driver = {
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.name = "sy8106a",
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.of_match_table = sy8106a_i2c_of_match,
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},
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.probe_new = sy8106a_i2c_probe,
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.id_table = sy8106a_i2c_id,
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};
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module_i2c_driver(sy8106a_regulator_driver);
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MODULE_AUTHOR("Ondřej Jirman <megous@megous.com>");
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MODULE_AUTHOR("Icenowy Zheng <icenowy@aosc.io>");
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MODULE_DESCRIPTION("Regulator device driver for Silergy SY8106A");
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MODULE_LICENSE("GPL");
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