From: Philipp Zabel <p.zabel@pengutronix.de>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] pwm-backlight: fix the panel power sequence
Date: Thu, 29 Oct 2015 15:40:59 +0000 [thread overview]
Message-ID: <1446133259.3274.52.camel@pengutronix.de> (raw)
In-Reply-To: <1445526750.27586.8.camel@mtksdaap41>
Hi YH,
Am Donnerstag, den 22.10.2015, 23:12 +0800 schrieb YH Huang:
> In the case of the panel disabled by the bootloader,
> your patch still has the following code and always enables the backlight
> in the probe function.
> pb->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable",
> - GPIOD_OUT_HIGH);
You are right.
> What do you think if I remove these two lines in my patch?
> if (pb->enable_gpio)
> gpiod_direction_output(pb->enable_gpio, 0);
That won't work if the gpio is still configured as input. How about I
add the GPIOD_ASIS change to my patch you remove that and the above from
yours?
best regards
Philipp
next prev parent reply other threads:[~2015-10-29 15:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-16 9:17 [PATCH v2] pwm-backlight: fix the panel power sequence YH Huang
2015-10-16 9:36 ` Philipp Zabel
2015-10-22 15:12 ` YH Huang
2015-10-29 15:40 ` Philipp Zabel [this message]
2015-10-30 7:41 ` YH Huang
2015-10-30 10:34 ` Philipp Zabel
2015-11-03 8:11 ` YH Huang
2015-11-03 11:08 ` Philipp Zabel
2015-11-04 1:47 ` YH Huang
2015-11-05 9:40 ` Philipp Zabel
2015-11-06 8:31 ` YH Huang
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