linux-kernel - Re: [PATCH 2/3] hwmon: Driver for OMAP3 temperature sensor

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Message-ID: <20141227195825.GF10007@amd>
Date:	Sat, 27 Dec 2014 20:58:25 +0100
From:	Pavel Machek <pavel@....cz>
To:	Sebastian Reichel <sre@...nel.org>
Cc:	Pali Rohar <pali.rohar@...il.com>, Jean Delvare <jdelvare@...e.de>,
	Guenter Roeck <linux@...ck-us.net>,
	Tony Lindgren <tony@...mide.com>,
	Benoît Cousson <bcousson@...libre.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-omap@...r.kernel.org, lm-sensors@...sensors.org,
	devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH 2/3] hwmon: Driver for OMAP3 temperature sensor

On Fri 2014-12-26 13:34:53, Sebastian Reichel wrote:
> OMAP34xx and OMAP36xx processors contain a register in the syscon area,
> which can be used to determine the SoCs temperature. This patch provides
> a DT based driver for the temperature sensor based on an older driver
> written by Peter De Schrijver for the Nokia N900 and N9.
> 
> Signed-off-by: Sebastian Reichel <sre@...nel.org>
> ---
>  drivers/hwmon/Kconfig      |   8 ++
>  drivers/hwmon/Makefile     |   1 +
>  drivers/hwmon/omap3-temp.c | 307 +++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 316 insertions(+)
>  create mode 100644 drivers/hwmon/omap3-temp.c

When it hangs, it loops here:

do {
regmap_read(data->syscon, SYSCON_TEMP_REG,&temp_sensor_reg);
if ((temp_sensor_reg & eocz_mask) == level)
   return true;
printk("=");
}
while (ktime_us_delta(expire, ktime_get()) > 0);

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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