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Date: Thu, 19 Nov 2020 13:46:11 +0100
From: Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J . Wysocki " <rafael@...nel.org>
Cc: kernel@...gutronix.de, linux-kernel@...r.kernel.org,
Russell King <rmk+kernel@....linux.org.uk>
Subject: [PATCH 3/3] driver core: platform: use bus_type functions
This works towards the goal mentioned in 2006 in commit 594c8281f905
("[PATCH] Add bus_type probe, remove, shutdown methods.").
The functions are moved to where the other bus_type functions are
defined and renamed to match the already established naming scheme.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
drivers/base/platform.c | 132 ++++++++++++++++++++--------------------
1 file changed, 65 insertions(+), 67 deletions(-)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index b847f5f8f992..8ad06daa2eaa 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -743,70 +743,6 @@ struct platform_device *platform_device_register_full(
}
EXPORT_SYMBOL_GPL(platform_device_register_full);
-static int platform_probe_fail(struct platform_device *pdev);
-
-static int platform_drv_probe(struct device *_dev)
-{
- struct platform_driver *drv = to_platform_driver(_dev->driver);
- struct platform_device *dev = to_platform_device(_dev);
- int ret;
-
- /*
- * A driver registered using platform_driver_probe() cannot be bound
- * again later because the probe function usually lives in __init code
- * and so is gone. For these drivers .probe is set to
- * platform_probe_fail in __platform_driver_probe(). Don't even
- * prepare clocks and PM domains for these to match the traditional
- * behaviour.
- */
- if (unlikely(drv->probe == platform_probe_fail))
- return -ENXIO;
-
- ret = of_clk_set_defaults(_dev->of_node, false);
- if (ret < 0)
- return ret;
-
- ret = dev_pm_domain_attach(_dev, true);
- if (ret)
- goto out;
-
- if (drv->probe) {
- ret = drv->probe(dev);
- if (ret)
- dev_pm_domain_detach(_dev, true);
- }
-
-out:
- if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) {
- dev_warn(_dev, "probe deferral not supported\n");
- ret = -ENXIO;
- }
-
- return ret;
-}
-
-static int platform_drv_remove(struct device *_dev)
-{
- struct platform_driver *drv = to_platform_driver(_dev->driver);
- struct platform_device *dev = to_platform_device(_dev);
- int ret = 0;
-
- if (drv->remove)
- ret = drv->remove(dev);
- dev_pm_domain_detach(_dev, true);
-
- return ret;
-}
-
-static void platform_drv_shutdown(struct device *_dev)
-{
- struct platform_driver *drv = to_platform_driver(_dev->driver);
- struct platform_device *dev = to_platform_device(_dev);
-
- if (drv->shutdown)
- drv->shutdown(dev);
-}
-
/**
* __platform_driver_register - register a driver for platform-level devices
* @drv: platform driver structure
@@ -817,9 +753,6 @@ int __platform_driver_register(struct platform_driver *drv,
{
drv->driver.owner = owner;
drv->driver.bus = &platform_bus_type;
- drv->driver.probe = platform_drv_probe;
- drv->driver.remove = platform_drv_remove;
- drv->driver.shutdown = platform_drv_shutdown;
return driver_register(&drv->driver);
}
@@ -1349,6 +1282,68 @@ static int platform_uevent(struct device *dev, struct kobj_uevent_env *env)
return 0;
}
+static int platform_probe(struct device *_dev)
+{
+ struct platform_driver *drv = to_platform_driver(_dev->driver);
+ struct platform_device *dev = to_platform_device(_dev);
+ int ret;
+
+ /*
+ * A driver registered using platform_driver_probe() cannot be bound
+ * again later because the probe function usually lives in __init code
+ * and so is gone. For these drivers .probe is set to
+ * platform_probe_fail in __platform_driver_probe(). Don't even prepare
+ * clocks and PM domains for these to match the traditional behaviour.
+ */
+ if (unlikely(drv->probe == platform_probe_fail))
+ return -ENXIO;
+
+ ret = of_clk_set_defaults(_dev->of_node, false);
+ if (ret < 0)
+ return ret;
+
+ ret = dev_pm_domain_attach(_dev, true);
+ if (ret)
+ goto out;
+
+ if (drv->probe) {
+ ret = drv->probe(dev);
+ if (ret)
+ dev_pm_domain_detach(_dev, true);
+ }
+
+out:
+ if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) {
+ dev_warn(_dev, "probe deferral not supported\n");
+ ret = -ENXIO;
+ }
+
+ return ret;
+}
+
+static int platform_remove(struct device *_dev)
+{
+ struct platform_driver *drv = to_platform_driver(_dev->driver);
+ struct platform_device *dev = to_platform_device(_dev);
+ int ret = 0;
+
+ if (drv->remove)
+ ret = drv->remove(dev);
+ dev_pm_domain_detach(_dev, true);
+
+ return ret;
+}
+
+static void platform_shutdown(struct device *_dev)
+{
+ struct platform_driver *drv = to_platform_driver(_dev->driver);
+ struct platform_device *dev = to_platform_device(_dev);
+
+ if (drv->shutdown)
+ drv->shutdown(dev);
+}
+
+
int platform_dma_configure(struct device *dev)
{
enum dev_dma_attr attr;
@@ -1375,6 +1370,9 @@ struct bus_type platform_bus_type = {
.dev_groups = platform_dev_groups,
.match = platform_match,
.uevent = platform_uevent,
+ .probe = platform_probe,
+ .remove = platform_remove,
+ .shutdown = platform_shutdown,
.dma_configure = platform_dma_configure,
.pm = &platform_dev_pm_ops,
};
--
2.28.0
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