Subject: [PATCH 2/3] hwmon: Driver for OMAP3 temperature sensor

From: [email-masked] (Pavel Machek)
Date: Sat, 27 Dec 2014 20:58:25 +0100

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 <[email-masked]>
> ---
>  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
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