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Groups > linux.kernel > #1234904
| From | Tomeu Vizoso <tomeu.vizoso@collabora.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v7 12/20] backlight: Probe backlight devices on demand |
| Date | 2015-09-29 11:20 +0200 |
| Message-ID | <qdZeQ-2b3-51@gated-at.bofh.it> (permalink) |
| References | <qdZeN-2b3-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
When looking up a backlight device through its OF node, probe it if it
hasn't already.
The goal is to reduce deferred probes to a minimum, as it makes it very
cumbersome to find out why a device failed to probe, and can introduce
very big delays in when a critical device is probed.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
---
drivers/video/backlight/backlight.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index bddc8b17a4d8..9bcdc16eacdf 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -16,6 +16,7 @@
#include <linux/err.h>
#include <linux/fb.h>
#include <linux/slab.h>
+#include <linux/of_device.h>
#ifdef CONFIG_PMAC_BACKLIGHT
#include <asm/backlight.h>
@@ -559,6 +560,8 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node)
{
struct device *dev;
+ of_device_probe(node);
+
dev = class_find_device(backlight_class, NULL, node, of_parent_match);
return dev ? to_backlight_device(dev) : NULL;
--
2.4.3
--
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[PATCH v7 0/20] On-demand device probing Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 20/20] of/platform: Defer probes of registered devices Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 13/20] usb: phy: Probe phy devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 09/20] drm/tegra: Probe dpaux devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 15/20] pinctrl: Probe pinctrl devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 06/20] pinctrl: Probe pinctrl devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 03/20] of/platform: Point to struct device from device node Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 10/20] i2c: core: Probe i2c adapters and devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 17/20] dma: of: Probe DMA controllers on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 11/20] pwm: Probe PWM chip devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 07/20] regulator: core: Probe regulators on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 12/20] backlight: Probe backlight devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200 [PATCH v7 04/20] of: add function to allow probing a device from a OF node Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-29 11:20 +0200
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