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https://github.com/torvalds/linux
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045a44d4c9
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230714174930.4063320-1-robh@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Copyright (C) 2012 ARM Limited
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#define DRVNAME "vexpress-regulator"
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#define pr_fmt(fmt) DRVNAME ": " fmt
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/vexpress.h>
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static int vexpress_regulator_get_voltage(struct regulator_dev *regdev)
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{
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unsigned int uV;
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int err = regmap_read(regdev->regmap, 0, &uV);
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return err ? err : uV;
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}
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static int vexpress_regulator_set_voltage(struct regulator_dev *regdev,
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int min_uV, int max_uV, unsigned *selector)
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{
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return regmap_write(regdev->regmap, 0, min_uV);
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}
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static const struct regulator_ops vexpress_regulator_ops_ro = {
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.get_voltage = vexpress_regulator_get_voltage,
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};
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static const struct regulator_ops vexpress_regulator_ops = {
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.get_voltage = vexpress_regulator_get_voltage,
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.set_voltage = vexpress_regulator_set_voltage,
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};
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static int vexpress_regulator_probe(struct platform_device *pdev)
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{
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struct regulator_desc *desc;
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struct regulator_init_data *init_data;
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struct regulator_config config = { };
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struct regulator_dev *rdev;
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struct regmap *regmap;
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desc = devm_kzalloc(&pdev->dev, sizeof(*desc), GFP_KERNEL);
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if (!desc)
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return -ENOMEM;
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regmap = devm_regmap_init_vexpress_config(&pdev->dev);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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desc->name = dev_name(&pdev->dev);
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desc->type = REGULATOR_VOLTAGE;
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desc->owner = THIS_MODULE;
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desc->continuous_voltage_range = true;
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init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
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desc);
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if (!init_data)
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return -EINVAL;
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init_data->constraints.apply_uV = 0;
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if (init_data->constraints.min_uV && init_data->constraints.max_uV)
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desc->ops = &vexpress_regulator_ops;
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else
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desc->ops = &vexpress_regulator_ops_ro;
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config.regmap = regmap;
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config.dev = &pdev->dev;
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config.init_data = init_data;
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config.of_node = pdev->dev.of_node;
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rdev = devm_regulator_register(&pdev->dev, desc, &config);
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return PTR_ERR_OR_ZERO(rdev);
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}
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static const struct of_device_id vexpress_regulator_of_match[] = {
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{ .compatible = "arm,vexpress-volt", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, vexpress_regulator_of_match);
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static struct platform_driver vexpress_regulator_driver = {
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.probe = vexpress_regulator_probe,
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.driver = {
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.name = DRVNAME,
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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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.of_match_table = vexpress_regulator_of_match,
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},
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};
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module_platform_driver(vexpress_regulator_driver);
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MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>");
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MODULE_DESCRIPTION("Versatile Express regulator");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:vexpress-regulator");
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