pwmr has to be set to get the imxfb backlight work,
though pwmr was only configurable trough the platform data.
Cc: Rob Herring <rob.herr...@calxeda.com>
Cc: Pawel Moll <pawel.m...@arm.com>
Cc: Mark Rutland <mark.rutl...@arm.com>
Cc: Stephen Warren <swar...@wwwdotorg.org>
Cc: Ian Campbell <ijc+devicet...@hellion.org.uk>
Cc: devicetree@vger.kernel.org
Cc: Jean-Christophe Plagniol-Villard <plagn...@jcrosoft.com>
Cc: Tomi Valkeinen <tomi.valkei...@ti.com>
Cc: linux-fb...@vger.kernel.org
Cc: Sascha Hauer <ker...@pengutronix.de>
Cc: linux-arm-ker...@lists.infradead.org
Cc: Eric Bénard <e...@eukrea.com>
Signed-off-by: Denis Carikli <de...@eukrea.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagn...@jcrosoft.com>
Acked-by: Grant Likely <grant.lik...@linaro.org>
---
ChangeLog v7->v8:
- Added ACKs.
---
.../devicetree/bindings/video/fsl,imx-fb.txt | 3 +++
drivers/video/imxfb.c | 2 ++
2 files changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/video/fsl,imx-fb.txt
b/Documentation/devicetree/bindings/video/fsl,imx-fb.txt
index 46da08d..ac457ae 100644
--- a/Documentation/devicetree/bindings/video/fsl,imx-fb.txt
+++ b/Documentation/devicetree/bindings/video/fsl,imx-fb.txt
@@ -17,6 +17,9 @@ Required nodes:
Optional properties:
- fsl,dmacr: DMA Control Register value. This is optional. By default, the
register is not modified as recommended by the datasheet.
+- fsl,pwmr: LCDC PWM Contrast Control Register value. That property is
+ optional, but defining it is necessary to get the backlight working. If
that
+ property is ommited, the register is zeroed.
- fsl,lscr1: LCDC Sharp Configuration Register value.
Example:
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
index 4bf3837..f09372d 100644
--- a/drivers/video/imxfb.c
+++ b/drivers/video/imxfb.c
@@ -833,6 +833,8 @@ static int imxfb_init_fbinfo(struct platform_device *pdev)
of_property_read_u32(np, "fsl,dmacr", &fbi->dmacr);
+ of_property_read_u32(np, "fsl,pwmr", &fbi->pwmr);
+
/* These two function pointers could be used by some specific
* platforms. */
fbi->lcd_power = NULL;
--
1.7.9.5
--
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