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staging: omap-thermal: add documentation for omap_bandgap_read_temp

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Document function which reads temperature register, depending on
bandgap device version.

Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eduardo Valentin 2013-03-15 08:59:59 -04:00 committed by Greg Kroah-Hartman
parent 7a556e6a4a
commit 4a6554ed29
1 changed files with 10 additions and 0 deletions
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10
drivers/staging/omap-thermal/omap-bandgap.c
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@ -109,6 +109,16 @@ static int omap_bandgap_power(struct omap_bandgap *bg_ptr, bool on)
return 0;
}
/**
* omap_bandgap_read_temp() - helper function to read sensor temperature
* @bg_ptr: pointer to omap_bandgap structure
* @id: bandgap sensor id
*
* Function to concentrate the steps to read sensor temperature register.
* This function is desired because, depending on bandgap device version,
* it might be needed to freeze the bandgap state machine, before fetching
* the register value.
*/
static u32 omap_bandgap_read_temp(struct omap_bandgap *bg_ptr, int id)
{
struct temp_sensor_registers *tsr;