From: "Heiko Stübner" <heiko@sntech.de>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Jonathan Cameron <jic23@kernel.org>,
linux-iio@vger.kernel.org, linux-rockchip@lists.infradead.org,
linux-kernel@vger.kernel.org, Caesar Wang <wxt@rock-chips.com>,
dianders@chromium.org
Subject: Re: [PATCH] iio: adc: rockchip_saradc: Explicitly disable ADC on probe
Date: Mon, 25 Jul 2016 21:41:41 +0200 [thread overview]
Message-ID: <2966977.qtjPvpdIFp@diego> (raw)
In-Reply-To: <1469475540-26855-1-git-send-email-linux@roeck-us.net>
Am Montag, 25. Juli 2016, 12:39:00 schrieb Guenter Roeck:
> If the ADC is read for the first time, the caller gets a timeout error,
> and the kernel log shows
>
> read channel() error: -110
>
> The ADC may be enabled on boot, and needs to be explicitly disabled
> for a read sequence to work (otherwise there is no completion interrupt).
> Disaple it explicitly in the probe function.
>
> Fixes: 44d6f2ef94f9 ("iio: adc: add driver for Rockchip saradc")
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
in my tests I hadn't notices that issue before, but that is likely because the
bootloaders I had didn't enable the saradc. Anyway, that looks definitly sane,
so
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
next prev parent reply other threads:[~2016-07-25 19:42 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-25 19:39 [PATCH] iio: adc: rockchip_saradc: Explicitly disable ADC on probe Guenter Roeck
2016-07-25 19:41 ` Heiko Stübner [this message]
2016-07-26 2:51 ` Caesar Wang
2016-07-26 3:22 ` Guenter Roeck
2016-07-26 6:48 ` Caesar Wang
2016-08-15 18:04 ` Jonathan Cameron
2016-08-15 19:52 ` Guenter Roeck
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