# Re: \[PATCH v4 2/2\] backlight: lm3630a: Add an enable gpio for the HWEN pin

- From: Lee Jones \<hidden\>
- Date: 2019-10-03 11:42:49 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2019/10/5732943
- Thread: https://ratatoskr.run/dri-devel/2019/09/5715850/t.md

```text
On Thu, 12 Sep 2019, Andreas Kemnade wrote:

> For now just enable it in the probe function to allow I2C
> access. Disabling also means resetting the register values
> to default and according to the datasheet does not give
> power savings.
> 
> Tested on Kobo Clara HD.
> 
> Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
> Reviewed-by: Dan Murphy <redacted>
> Reviewed-by: Daniel Thompson <redacted>
> ---
> changes in v2:
> - simplification
> - correct gpio direction initialisation
> 
> changes in v3:
> - removed legacy include
> 
>  drivers/video/backlight/lm3630a_bl.c | 9 +++++++++
>  1 file changed, 9 insertions(+)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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```