Messages in this thread Patch in this message | | | From | Tomeu Vizoso <> | Subject | [PATCH v6 22/22] of/platform: Defer probes of registered devices | Date | Mon, 21 Sep 2015 16:03:02 +0200 |
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Instead of trying to match and probe platform and AMBA devices right after each is registered, delay their probes until device_initcall_sync.
This means that devices will start probing once all built-in drivers have registered, and after all platform and AMBA devices from the DT have been registered already.
This allows us to prevent deferred probes by probing dependencies on demand.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> ---
Changes in v4: - Also defer probes of AMBA devices registered from the DT as they can also request resources.
drivers/of/platform.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 408d89f1d124..7b33e0369374 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -164,7 +164,8 @@ static struct platform_device *of_platform_device_create_pdata( struct device_node *np, const char *bus_id, void *platform_data, - struct device *parent) + struct device *parent, + bool probe_late) { struct platform_device *dev; @@ -178,6 +179,7 @@ static struct platform_device *of_platform_device_create_pdata( dev->dev.bus = &platform_bus_type; dev->dev.platform_data = platform_data; + dev->dev.probe_late = probe_late; of_dma_configure(&dev->dev, dev->dev.of_node); of_msi_configure(&dev->dev, dev->dev.of_node); @@ -209,7 +211,8 @@ struct platform_device *of_platform_device_create(struct device_node *np, const char *bus_id, struct device *parent) { - return of_platform_device_create_pdata(np, bus_id, NULL, parent); + return of_platform_device_create_pdata(np, bus_id, NULL, parent, + false); } EXPORT_SYMBOL(of_platform_device_create); @@ -240,6 +243,7 @@ static struct amba_device *of_amba_device_create(struct device_node *node, dev->dev.of_node = of_node_get(node); dev->dev.parent = parent ? : &platform_bus; dev->dev.platform_data = platform_data; + dev->dev.probe_late = true; if (bus_id) dev_set_name(&dev->dev, "%s", bus_id); else @@ -358,7 +362,8 @@ static int of_platform_bus_create(struct device_node *bus, return 0; } - dev = of_platform_device_create_pdata(bus, bus_id, platform_data, parent); + dev = of_platform_device_create_pdata(bus, bus_id, platform_data, + parent, true); if (!dev || !of_match_node(matches, bus)) return 0; -- 2.4.3
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