[PATCH v2] soc: mediatek: add scpsys support active_wakeup
Eddie Huang
eddie.huang at mediatek.com
Tue Aug 25 23:55:08 PDT 2015
On Wed, 2015-08-26 at 05:11 +0800, Daniel Kurtz wrote:
> Hi Eddie,
>
> On Tue, Aug 25, 2015 at 2:00 PM, Eddie Huang <eddie.huang at mediatek.com> wrote:
> > Register gpd_dev_ops.active_wakeup function to support keep power
> > during suspend state. And add flag to each power domain to
> > decide whether keep power during suspend or not.
> >
> > Signed-off-by: Chunfeng Yun <chunfeng.yun at mediatek.com>
> > Signed-off-by: Eddie Huang <eddie.huang at mediatek.com>
> > Acked-by: Sascha Hauer <s.hauer at pengutronix.de>
> >
> > ---
> > Change in v2:
> > Drop .active_wakeup = false lines in scp_domain_data[] array
> >
> > ---
> > drivers/soc/mediatek/mtk-scpsys.c | 19 +++++++++++++++++++
> > 1 file changed, 19 insertions(+)
> >
> > diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> > index 43a79ed..df2f288 100644
> > --- a/drivers/soc/mediatek/mtk-scpsys.c
> > +++ b/drivers/soc/mediatek/mtk-scpsys.c
> > @@ -67,6 +67,7 @@ struct scp_domain_data {
> > u32 sram_pdn_ack_bits;
> > u32 bus_prot_mask;
> > enum clk_id clk_id;
> > + bool active_wakeup;
> > };
> >
> > static const struct scp_domain_data scp_domain_data[] __initconst = {
> > @@ -127,6 +128,7 @@ static const struct scp_domain_data scp_domain_data[] __initconst = {
> > .sram_pdn_bits = GENMASK(11, 8),
> > .sram_pdn_ack_bits = GENMASK(15, 12),
> > .clk_id = MT8173_CLK_NONE,
> > + .active_wakeup = true,
> > },
> > [MT8173_POWER_DOMAIN_MFG_ASYNC] = {
> > .name = "mfg_async",
> > @@ -171,6 +173,7 @@ struct scp_domain {
> > u32 sram_pdn_bits;
> > u32 sram_pdn_ack_bits;
> > u32 bus_prot_mask;
> > + bool active_wakeup;
> > };
> >
> > struct scp {
> > @@ -370,6 +373,20 @@ out:
> > return ret;
> > }
> >
> > +static bool scpsys_active_wakeup(struct device *dev)
> > +{
> > + struct generic_pm_domain *genpd;
> > + struct scp_domain *scpd;
> > +
> > + if (IS_ERR_OR_NULL(dev->pm_domain))
> > + return false;
>
> Is it really possible to get here w/ pm_domain as an ERR or NULL?
> If the power core can ensure this cannot happen, then this function
> could be a bit simpler.
>
> Other than that, this patch is:
> Reviewed-by: Daniel Kurtz <djkurtz at chromium.org>
>
> -Dan
>
After checking drivers/base/power/domain.c, I believe check
dev->pm_domain here is redundant, I will remove it.
Eddie
Thanks
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