Tero Kristo <[email protected]> writes: > From: Santosh Shilimkar <[email protected]> > > The ROM BUG is when MPU Domain OFF wake up sequence that can compromise > IVA and Tesla execution. > > At wakeup from MPU OFF on HS device only (not GP device), when > restoring the Secure RAM, the ROM Code reconfigures the clocks the > same way it is done at Cold Reset.
Ouch. > The IVAHD Clocks and Power Domain settings are: > IVAHD_CM2 IVAHD_CLKCTRL_MODULE_MODE = DISABLE > IVAHD_CM2 SL2_CLKCTRL_MODULE_MODE = DISABLE > IVAHD_CM2 SL2_CLKSTCTRL_CLKTRCTRL = HW_AUTO > IVAHD_PRM IVAHD_PWRSTCTRL_POWERSTATE = OFF > The TESLA Clocks and Power Domain settings are: > TESLA_CM1 TESLA_CLKCTRL_MODULE_MODE = DISABLE > TESLA_CM1 TESLA_CLKSTCTRL_CLKTRCTRL = HW_AUTO > TESLA_PRM TESLA_PWRSTCTRL_POWERSTATE = OFF > > This patch fixes the low power OFF mode code so that the these > registers are saved and restore across MPU OFF state. > > Also because of this limitation, MPU OFF alone is not targeted without > device OFF to avoid IVAHD and TESLA execution impact I don't see where this restriction is implemented. And, can this be hooked into cluster PM notifiers. Kevin -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
