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soc: renesas: rmobile-sysc: Set GENPD_FLAG_ALWAYS_ON for always-on domain

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Currently the R-Mobile "always-on" PM Domain is implemented by returning
-EBUSY from the generic_pm_domain.power_off() callback, and doing
nothing in the generic_pm_domain.power_on() callback.  However, this
means the PM Domain core code is not aware of the semantics of this
special domain, leading to boot warnings like the following on
SH/R-Mobile SoCs:

    sh_cmt e6130000.timer: PM domain c5 will not be powered off

Fix this by making the always-on nature of the domain explicit instead,
by setting the GENPD_FLAG_ALWAYS_ON flag.  This removes the need for the
domain to provide power control callbacks.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Geert Uytterhoeven 2019-08-09 15:43:07 +02:00
parent e0e1df6152
commit af0bc63472
1 changed files with 16 additions and 15 deletions
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31
drivers/soc/renesas/rmobile-sysc.c
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@ -48,12 +48,8 @@ struct rmobile_pm_domain *to_rmobile_pd(struct generic_pm_domain *d)
static int rmobile_pd_power_down(struct generic_pm_domain *genpd)
{
struct rmobile_pm_domain *rmobile_pd = to_rmobile_pd(genpd);
unsigned int mask;
unsigned int mask = BIT(rmobile_pd->bit_shift);
if (rmobile_pd->bit_shift == ~0)
return -EBUSY;
mask = BIT(rmobile_pd->bit_shift);
if (rmobile_pd->suspend) {
int ret = rmobile_pd->suspend();
@ -80,14 +76,10 @@ static int rmobile_pd_power_down(struct generic_pm_domain *genpd)
static int __rmobile_pd_power_up(struct rmobile_pm_domain *rmobile_pd)
{
unsigned int mask;
unsigned int mask = BIT(rmobile_pd->bit_shift);
unsigned int retry_count;
int ret = 0;
if (rmobile_pd->bit_shift == ~0)
return 0;
mask = BIT(rmobile_pd->bit_shift);
if (__raw_readl(rmobile_pd->base + PSTR) & mask)
return ret;
@ -122,11 +114,15 @@ static void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd)
struct dev_power_governor *gov = rmobile_pd->gov;
genpd->flags |= GENPD_FLAG_PM_CLK | GENPD_FLAG_ACTIVE_WAKEUP;
genpd->power_off = rmobile_pd_power_down;
genpd->power_on = rmobile_pd_power_up;
genpd->attach_dev = cpg_mstp_attach_dev;
genpd->detach_dev = cpg_mstp_detach_dev;
__rmobile_pd_power_up(rmobile_pd);
genpd->attach_dev = cpg_mstp_attach_dev;
genpd->detach_dev = cpg_mstp_detach_dev;
if (!(genpd->flags & GENPD_FLAG_ALWAYS_ON)) {
genpd->power_off = rmobile_pd_power_down;
genpd->power_on = rmobile_pd_power_up;
__rmobile_pd_power_up(rmobile_pd);
}
pm_genpd_init(genpd, gov ? : &simple_qos_governor, false);
}
@ -270,6 +266,11 @@ static void __init rmobile_setup_pm_domain(struct device_node *np,
break;
case PD_NORMAL:
if (pd->bit_shift == ~0) {
/* Top-level always-on domain */
pr_debug("PM domain %s is always-on domain\n", name);
pd->genpd.flags |= GENPD_FLAG_ALWAYS_ON;
}
break;
}