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ti-soc-thermal: implement eocz bit to make driver useful on omap3

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For omap3, proper implementation of eocz bit is needed. It was
actually a TODO in the driver.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Pavel Machek 2015-01-18 21:20:51 +01:00 committed by Eduardo Valentin
parent e34238bf98
commit a4296d19b5
1 changed files with 18 additions and 6 deletions
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24
drivers/thermal/ti-soc-thermal/ti-bandgap.c
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@ -894,7 +894,8 @@ void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id)
static int
ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id)
{
u32 temp = 0, counter = 1000;
u32 counter = 1000;
struct temp_sensor_registers *tsr;
/* Select single conversion mode */
if (TI_BANDGAP_HAS(bgp, MODE_CONFIG))
@ -902,16 +903,27 @@ ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id)
/* Start of Conversion = 1 */
RMW_BITS(bgp, id, temp_sensor_ctrl, bgap_soc_mask, 1);
/* Wait until DTEMP is updated */
temp = ti_bandgap_read_temp(bgp, id);
while ((temp == 0) && --counter)
temp = ti_bandgap_read_temp(bgp, id);
/* REVISIT: Check correct condition for end of conversion */
/* Wait for EOCZ going up */
tsr = bgp->conf->sensors[id].registers;
while (--counter) {
if (ti_bandgap_readl(bgp, tsr->temp_sensor_ctrl) &
tsr->bgap_eocz_mask)
break;
}
/* Start of Conversion = 0 */
RMW_BITS(bgp, id, temp_sensor_ctrl, bgap_soc_mask, 0);
/* Wait for EOCZ going down */
counter = 1000;
while (--counter) {
if (!(ti_bandgap_readl(bgp, tsr->temp_sensor_ctrl) &
tsr->bgap_eocz_mask))
break;
}
return 0;
}