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regulator: dummy: convert to use the faux device interface

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The dummy regulator driver does not need to create a platform device, it
only did so because it was simple to do.  Change it over to use the
faux bus instead as this is NOT a real platform device, and it makes
the code even smaller than before.

Reviewed-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/2025021027-outclass-stress-59dd@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2025-02-10 13:30:27 +01:00
parent 6f119e3da7
commit dcd2a9a555
1 changed files with 9 additions and 28 deletions
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37
drivers/regulator/dummy.c
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@ -13,7 +13,7 @@
#include <linux/err.h>
#include <linux/export.h>
#include <linux/platform_device.h>
#include <linux/device/faux.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
@ -37,15 +37,15 @@ static const struct regulator_desc dummy_desc = {
.ops = &dummy_ops,
};
static int dummy_regulator_probe(struct platform_device *pdev)
static int dummy_regulator_probe(struct faux_device *fdev)
{
struct regulator_config config = { };
int ret;
config.dev = &pdev->dev;
config.dev = &fdev->dev;
config.init_data = &dummy_initdata;
dummy_regulator_rdev = devm_regulator_register(&pdev->dev, &dummy_desc,
dummy_regulator_rdev = devm_regulator_register(&fdev->dev, &dummy_desc,
&config);
if (IS_ERR(dummy_regulator_rdev)) {
ret = PTR_ERR(dummy_regulator_rdev);
@ -56,36 +56,17 @@ static int dummy_regulator_probe(struct platform_device *pdev)
return 0;
}
static struct platform_driver dummy_regulator_driver = {
.probe = dummy_regulator_probe,
.driver = {
.name = "reg-dummy",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
struct faux_device_ops dummy_regulator_driver = {
.probe = dummy_regulator_probe,
};
static struct platform_device *dummy_pdev;
static struct faux_device *dummy_fdev;
void __init regulator_dummy_init(void)
{
int ret;
dummy_pdev = platform_device_alloc("reg-dummy", -1);
if (!dummy_pdev) {
dummy_fdev = faux_device_create("reg-dummy", NULL, &dummy_regulator_driver);
if (!dummy_fdev) {
pr_err("Failed to allocate dummy regulator device\n");
return;
}
ret = platform_device_add(dummy_pdev);
if (ret != 0) {
pr_err("Failed to register dummy regulator device: %d\n", ret);
platform_device_put(dummy_pdev);
return;
}
ret = platform_driver_register(&dummy_regulator_driver);
if (ret != 0) {
pr_err("Failed to register dummy regulator driver: %d\n", ret);
platform_device_unregister(dummy_pdev);
}
}