From: Lucas Stach <l.stach@pengutronix.de>
To: Lee Jones <lee.jones@linaro.org>,
Daniel Thompson <daniel.thompson@linaro.org>,
Jingoo Han <jingoohan1@gmail.com>
Cc: kernel@pengutronix.de, dri-devel@lists.freedesktop.org,
patchwork-lst@pengutronix.de
Subject: [PATCH v2] backlight: rave-sp: don't touch initial state and register with correct device
Date: Mon, 8 Jul 2019 14:41:29 +0200 [thread overview]
Message-ID: <20190708124129.5664-1-l.stach@pengutronix.de> (raw)
This way the backlight can be referenced through its device node and
enabling/disabling can be managed through the panel driver.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
drivers/video/backlight/rave-sp-backlight.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/video/backlight/rave-sp-backlight.c b/drivers/video/backlight/rave-sp-backlight.c
index 462f14a1b19d..05b5f003a3d1 100644
--- a/drivers/video/backlight/rave-sp-backlight.c
+++ b/drivers/video/backlight/rave-sp-backlight.c
@@ -48,14 +48,20 @@ static int rave_sp_backlight_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct backlight_device *bd;
- bd = devm_backlight_device_register(dev, pdev->name, dev->parent,
+ bd = devm_backlight_device_register(dev, pdev->name, dev,
dev_get_drvdata(dev->parent),
&rave_sp_backlight_ops,
&rave_sp_backlight_props);
if (IS_ERR(bd))
return PTR_ERR(bd);
- backlight_update_status(bd);
+ /*
+ * If there is a phandle pointing to the device node we can
+ * assume that another device will manage the status changes.
+ * If not we make sure the backlight is in a consistent state.
+ */
+ if (!dev->of_node->phandle)
+ backlight_update_status(bd);
return 0;
}
--
2.20.1
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next reply other threads:[~2019-07-08 12:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-08 12:41 Lucas Stach [this message]
2019-07-09 9:32 ` [PATCH v2] backlight: rave-sp: don't touch initial state and register with correct device Daniel Thompson
2019-07-25 12:04 ` Lee Jones
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