From: Alexandru Ardelean <alex@shruggie.ro>
To: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fbdev@vger.kernel.org
Cc: daniel.thompson@linaro.org, pavel@ucw.cz, jingoohan1@gmail.com,
deller@gmx.de, lee@kernel.org, conor+dt@kernel.org,
Alexandru Ardelean <alex@shruggie.ro>,
robh+dt@kernel.org, Philippe CORNU <philippe.cornu@foss.st.com>,
krzysztof.kozlowski+dt@linaro.org,
Yannick Fertre <yannick.fertre@foss.st.com>
Subject: [PATCH 1/2] backlight: gpio_backlight: add new property default-brightness-level
Date: Fri, 19 May 2023 23:05:19 +0300 [thread overview]
Message-ID: <20230519200520.10657-1-alex@shruggie.ro> (raw)
From: Yannick Fertre <yannick.fertre@foss.st.com>
Add new property to set a brightness by default at probe.
Reviewed-by: Philippe CORNU <philippe.cornu@foss.st.com>
Signed-off-by: Yannick Fertre <yannick.fertre@foss.st.com>
Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>
---
Link to original patch:
https://github.com/STMicroelectronics/linux/commit/c4067d7bd883c6fa14ffd49892c4ce663cdafe98
drivers/video/backlight/gpio_backlight.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c
index 6f78d928f054..d3fa3a8bef4d 100644
--- a/drivers/video/backlight/gpio_backlight.c
+++ b/drivers/video/backlight/gpio_backlight.c
@@ -53,6 +53,7 @@ static int gpio_backlight_probe(struct platform_device *pdev)
struct backlight_device *bl;
struct gpio_backlight *gbl;
int ret, init_brightness, def_value;
+ u32 value;
gbl = devm_kzalloc(dev, sizeof(*gbl), GFP_KERNEL);
if (gbl == NULL)
@@ -93,7 +94,11 @@ static int gpio_backlight_probe(struct platform_device *pdev)
else
bl->props.power = FB_BLANK_UNBLANK;
- bl->props.brightness = 1;
+ ret = device_property_read_u32(dev, "default-brightness-level", &value);
+ if (!ret && value <= props.max_brightness)
+ bl->props.brightness = value;
+ else
+ bl->props.brightness = 1;
init_brightness = backlight_get_brightness(bl);
ret = gpiod_direction_output(gbl->gpiod, init_brightness);
--
2.40.1
next reply other threads:[~2023-05-20 9:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-19 20:05 Alexandru Ardelean [this message]
2023-05-19 20:05 ` [PATCH 2/2] dt-bindings: backlight: document new property default-brightness-level Alexandru Ardelean
2023-05-26 10:20 ` Daniel Thompson
2023-05-29 7:03 ` Alexandru Ardelean
2023-05-26 12:05 ` Philippe CORNU
2023-05-29 7:03 ` Alexandru Ardelean
2023-05-26 10:27 ` [PATCH 1/2] backlight: gpio_backlight: add " Daniel Thompson
2023-05-26 12:04 ` Philippe CORNU
2023-05-29 7:02 ` Alexandru Ardelean
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