linux-stable/drivers/bus/simple-pm-bus.c
Tony Lindgren eda080eabf drivers: bus: simple-pm-bus: Fix compatibility with simple-bus for auxdata
After converting am335x to probe devices with simple-pm-bus I noticed
that we are not passing auxdata for of_platform_populate() like we do
with simple-bus.

While device tree using SoCs should no longer need platform data, there
are still quite a few drivers that still need it as can be seen with
git grep OF_DEV_AUXDATA. We want to have simple-pm-bus be usable as a
replacement for simple-bus also for cases where OF_DEV_AUXDATA is still
needed.

Let's fix the issue by passing auxdata as platform data to simple-pm-bus.
That way the SoCs needing this can pass the auxdata with OF_DEV_AUXDATA.
And let's pass the auxdata for omaps to fix the issue for am335x.

As an alternative solution, adding simple-pm-bus handling directly to
drivers/of/platform.c was considered, but we would still need simple-pm-bus
device driver. So passing auxdata as platform data seems like the simplest
solution.

Fixes: 5a230524f8 ("ARM: dts: Use simple-pm-bus for genpd for am3 l4_wkup")
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2021-01-15 12:50:49 +02:00

59 lines
1.4 KiB
C

/*
* Simple Power-Managed Bus Driver
*
* Copyright (C) 2014-2015 Glider bvba
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
static int simple_pm_bus_probe(struct platform_device *pdev)
{
const struct of_dev_auxdata *lookup = dev_get_platdata(&pdev->dev);
struct device_node *np = pdev->dev.of_node;
dev_dbg(&pdev->dev, "%s\n", __func__);
pm_runtime_enable(&pdev->dev);
if (np)
of_platform_populate(np, NULL, lookup, &pdev->dev);
return 0;
}
static int simple_pm_bus_remove(struct platform_device *pdev)
{
dev_dbg(&pdev->dev, "%s\n", __func__);
pm_runtime_disable(&pdev->dev);
return 0;
}
static const struct of_device_id simple_pm_bus_of_match[] = {
{ .compatible = "simple-pm-bus", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, simple_pm_bus_of_match);
static struct platform_driver simple_pm_bus_driver = {
.probe = simple_pm_bus_probe,
.remove = simple_pm_bus_remove,
.driver = {
.name = "simple-pm-bus",
.of_match_table = simple_pm_bus_of_match,
},
};
module_platform_driver(simple_pm_bus_driver);
MODULE_DESCRIPTION("Simple Power-Managed Bus Driver");
MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>");
MODULE_LICENSE("GPL v2");