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During probe this means the clocks are enabled and a reference > is kept. > > On AM33xx deep sleep is entered by the PM coprocessor which > requires the PER power domain to be idle. The system timer driver > disables the clock during suspend but the additional reference held by > ti-sysc leads to the PER power domain not being idle: > > pm33xx pm33xx: PM: Could not transition all powerdomains to target state > > The reserved status is only needed where the > gpt12 system timer must be kept from idling, see commit > 3ff340e24c9d ("bus: ti-sysc: Fix gpt12 system timer issue with reserved status") > > The timer configuration in the devicetree is the same on all SoCs, so > there is no reason to reserve the timers on AM33xx. > > Return -ENODEV for the system timers on all other SoCs. Like -EBUSY it > stops the probe but the driver core doesn't report it as failure. > > Fixes: 3f6178392050 ("ti-sysc: allow OMAP2 and OMAP4 timers to be reserved on AM33xx") > Cc: stable@vger.kernel.org > Signed-off-by: Markus Schneider-Pargmann (TI) Thanks for the patch, tested on various AM3* boards. Tested-by: Judith Mendez > --- > drivers/bus/ti-sysc.c | 5 +---- > 1 file changed, 1 insertion(+), 4 deletions(-) > > diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c > index e118b900c9ac..922a90d4c5a3 100644 > --- a/drivers/bus/ti-sysc.c > +++ b/drivers/bus/ti-sysc.c > @@ -48,7 +48,6 @@ enum sysc_soc { > SOC_UNKNOWN, > SOC_2420, > SOC_2430, > - SOC_AM33, > SOC_3430, > SOC_AM35, > SOC_3630, > @@ -2917,7 +2916,6 @@ static void ti_sysc_idle(struct work_struct *work) > static const struct soc_device_attribute sysc_soc_match[] = { > SOC_FLAG("OMAP242*", SOC_2420), > SOC_FLAG("OMAP243*", SOC_2430), > - SOC_FLAG("AM33*", SOC_AM33), > SOC_FLAG("AM35*", SOC_AM35), > SOC_FLAG("OMAP3[45]*", SOC_3430), > SOC_FLAG("OMAP3[67]*", SOC_3630), > @@ -3124,13 +3122,12 @@ static int sysc_check_active_timer(struct sysc *ddata) > * A to B4 at some point. > */ > switch (sysc_soc->soc) { > - case SOC_AM33: > case SOC_3430: > case SOC_AM35: > error = -ENXIO; > break; > default: > - error = -EBUSY; > + error = -ENODEV; > } > > if ((ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT) && > > --- > base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4 > change-id: 20261030-v7-3-topic-am335lpm-ti-sysc-13f0219c9d67 > > Best regards, > -- > Markus Schneider-Pargmann (TI) >