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imx233: fix regulator code on stmp3700

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For some reason the power subsystem needs to know the relationship between
the VDD{D,A,IO} and uses a weird register to do so.

Change-Id: I7fcc75f6cc0460b4997914986deda7ca544a4940
This commit is contained in:
Amaury Pouly 2014-03-08 18:21:44 +01:00
parent 4b2f59b3db
commit 9fe3687923
1 changed files with 17 additions and 0 deletions
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17
firmware/target/arm/imx233/power-imx233.c
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@ -355,6 +355,19 @@ void imx233_power_get_regulator(enum imx233_regulator_t reg, unsigned *value_mv,
*brownout_mv = 0; *brownout_mv = 0;
} }
#if IMX233_SUBTARGET >= 3700 && IMX233_SUBTARGET < 3780
static void update_dcfuncv(void)
{
int vddd, vdda, vddio;
imx233_power_get_regulator(REGULATOR_VDDD, &vddd, NULL);
imx233_power_get_regulator(REGULATOR_VDDA, &vdda, NULL);
imx233_power_get_regulator(REGULATOR_VDDIO, &vddio, NULL);
// assume Li-Ion, to divide by 6.25, do *100 and /625
HW_POWER_DCFUNCV = BF_OR2(POWER_DCFUNCV, VDDIO(((vddio - vdda) * 100) / 625),
VDDD(((vdda - vddd) * 100) / 625));
}
#endif
void imx233_power_set_regulator(enum imx233_regulator_t reg, unsigned value_mv, void imx233_power_set_regulator(enum imx233_regulator_t reg, unsigned value_mv,
unsigned brownout_mv) unsigned brownout_mv)
{ {
@ -392,6 +405,10 @@ void imx233_power_set_regulator(enum imx233_regulator_t reg, unsigned value_mv,
yield(); yield();
if(!BF_RD(POWER_STS, DC1_OK) || !BF_RD(POWER_STS, DC2_OK)) if(!BF_RD(POWER_STS, DC1_OK) || !BF_RD(POWER_STS, DC2_OK))
panicf("regulator %d: failed to stabilize", reg); panicf("regulator %d: failed to stabilize", reg);
#endif
/* On STMP37xx, we need to update the weird HW_POWER_DCFUNCV register */
#if IMX233_SUBTARGET >= 3700 && IMX233_SUBTARGET < 3780
update_dcfuncv();
#endif #endif
} }