[RFC,3/7] soc: mediatek: add support for the performance state
diff mbox series

Message ID 1546436644-19234-4-git-send-email-henryc.chen@mediatek.com
State New
Headers show
Series
  • Add driver for dvfsrc and add support for active state of scpsys on mt8183
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Commit Message

Henry Chen Jan. 2, 2019, 1:44 p.m. UTC
Support power domain performance state, add header file for scp event.

Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
---
 drivers/soc/mediatek/mtk-scpsys.c | 60 +++++++++++++++++++++++++++++++++++++++
 drivers/soc/mediatek/mtk-scpsys.h | 22 ++++++++++++++
 2 files changed, 82 insertions(+)
 create mode 100644 drivers/soc/mediatek/mtk-scpsys.h

Comments

Nicolas Boichat Jan. 3, 2019, 1:48 a.m. UTC | #1
On Wed, Jan 2, 2019 at 10:01 PM Henry Chen <henryc.chen@mediatek.com> wrote:
>
> Support power domain performance state, add header file for scp event.
>
> Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
> ---
>  drivers/soc/mediatek/mtk-scpsys.c | 60 +++++++++++++++++++++++++++++++++++++++
>  drivers/soc/mediatek/mtk-scpsys.h | 22 ++++++++++++++
>  2 files changed, 82 insertions(+)
>  create mode 100644 drivers/soc/mediatek/mtk-scpsys.h
>
> diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> index 58d84fe..90102ae 100644
> --- a/drivers/soc/mediatek/mtk-scpsys.c
> +++ b/drivers/soc/mediatek/mtk-scpsys.c
> @@ -11,7 +11,9 @@
>  #include <linux/of_device.h>
>  #include <linux/platform_device.h>
>  #include <linux/pm_domain.h>
> +#include <linux/pm_opp.h>
>  #include <linux/regulator/consumer.h>
> +#include <linux/slab.h>
>  #include <linux/soc/mediatek/infracfg.h>
>  #include <linux/soc/mediatek/scpsys-ext.h>
>
> @@ -22,6 +24,7 @@
>  #include <dt-bindings/power/mt7623a-power.h>
>  #include <dt-bindings/power/mt8173-power.h>
>  #include <dt-bindings/power/mt8183-power.h>
> +#include "mtk-scpsys.h"
>
>  #define MTK_POLL_DELAY_US   10
>  #define MTK_POLL_TIMEOUT    (jiffies_to_usecs(HZ))
> @@ -187,6 +190,18 @@ struct scp_soc_data {
>         bool bus_prot_reg_update;
>  };
>
> +BLOCKING_NOTIFIER_HEAD(scpsys_notifier_list);
> +
> +int register_scpsys_notifier(struct notifier_block *nb)
> +{
> +       return blocking_notifier_chain_register(&scpsys_notifier_list, nb);
> +}
> +
> +int unregister_scpsys_notifier(struct notifier_block *nb)
> +{
> +       return blocking_notifier_chain_unregister(&scpsys_notifier_list, nb);
> +}
> +
>  static int scpsys_domain_is_on(struct scp_domain *scpd)
>  {
>         struct scp *scp = scpd->scp;
> @@ -536,6 +551,48 @@ static void init_clks(struct platform_device *pdev, struct clk **clk)
>                 clk[i] = devm_clk_get(&pdev->dev, clk_names[i]);
>  }
>
> +static int mtk_pd_set_performance(struct generic_pm_domain *genpd,
> +                                 unsigned int state)
> +{
> +       int i;
> +       struct scp_domain *scpd =
> +               container_of(genpd, struct scp_domain, genpd);

nit: This (just) fits in 80 chars.

> +       struct scp_event_data scpe;
> +       struct scp *scp = scpd->scp;
> +       struct genpd_onecell_data *pd_data = &scp->pd_data;
> +
> +       for (i = 0; i < pd_data->num_domains; i++) {
> +               if (genpd == pd_data->domains[i]) {
> +                       dev_dbg(scp->dev, "%d. %s = %d\n",
> +                               i, genpd->name, state);
> +                       break;
> +               }
> +       }

Do we need a sanity check here, if i == pd_data->num_domains?

> +
> +       scpe.event_type = MTK_SCPSYS_PSTATE;
> +       scpe.genpd = genpd;
> +       scpe.domain_id = i;
> +       blocking_notifier_call_chain(&scpsys_notifier_list, state, &scpe);
> +
> +       return 0;
> +}
> +
> +static unsigned int mtk_pd_get_performance(struct generic_pm_domain *genpd,
> +                                          struct dev_pm_opp *opp)
> +{
> +       struct device_node *np;
> +       unsigned int state;
> +
> +       np = dev_pm_opp_get_of_node(opp);
> +
> +       if (of_property_read_u32(np, "mtk,level", &state))
> +               return 0;
> +
> +       of_node_put(np);
> +
> +       return state;
> +}
> +
>  static struct scp *init_scp(struct platform_device *pdev,
>                         const struct scp_domain_data *scp_domain_data, int num,
>                         const struct scp_ctrl_reg *scp_ctrl_reg,
> @@ -659,6 +716,9 @@ static struct scp *init_scp(struct platform_device *pdev,
>                 genpd->power_on = scpsys_power_on;
>                 if (MTK_SCPD_CAPS(scpd, MTK_SCPD_ACTIVE_WAKEUP))
>                         genpd->flags |= GENPD_FLAG_ACTIVE_WAKEUP;
> +
> +               genpd->set_performance_state = mtk_pd_set_performance;
> +               genpd->opp_to_performance_state = mtk_pd_get_performance;
>         }
>
>         return scp;
> diff --git a/drivers/soc/mediatek/mtk-scpsys.h b/drivers/soc/mediatek/mtk-scpsys.h
> new file mode 100644
> index 0000000..c1e8325
> --- /dev/null
> +++ b/drivers/soc/mediatek/mtk-scpsys.h
> @@ -0,0 +1,22 @@
> +/* SPDX-License-Identifier: GPL-2.0
> + *
> + * Copyright (c) 2018 MediaTek Inc.
> + */
> +
> +#ifndef __MTK_SCPSYS_H__
> +#define __MTK_SCPSYS_H__
> +
> +struct scp_event_data {
> +       int event_type;
> +       int domain_id;
> +       struct generic_pm_domain *genpd;
> +};
> +
> +enum scp_event_type {
> +       MTK_SCPSYS_PSTATE,
> +};
> +
> +int register_scpsys_notifier(struct notifier_block *nb);
> +int unregister_scpsys_notifier(struct notifier_block *nb);
> +
> +#endif /* __MTK_SCPSYS_H__ */
> --
> 1.9.1
>
Henry Chen Jan. 3, 2019, 2:16 p.m. UTC | #2
On Thu, 2019-01-03 at 09:48 +0800, Nicolas Boichat wrote:
> On Wed, Jan 2, 2019 at 10:01 PM Henry Chen <henryc.chen@mediatek.com> wrote:
> >
> > Support power domain performance state, add header file for scp event.
> >
> > Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
> > ---
> >  drivers/soc/mediatek/mtk-scpsys.c | 60 +++++++++++++++++++++++++++++++++++++++
> >  drivers/soc/mediatek/mtk-scpsys.h | 22 ++++++++++++++
> >  2 files changed, 82 insertions(+)
> >  create mode 100644 drivers/soc/mediatek/mtk-scpsys.h
> >
> > diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> > index 58d84fe..90102ae 100644
> > --- a/drivers/soc/mediatek/mtk-scpsys.c
> > +++ b/drivers/soc/mediatek/mtk-scpsys.c
> > @@ -11,7 +11,9 @@
> >  #include <linux/of_device.h>
> >  #include <linux/platform_device.h>
> >  #include <linux/pm_domain.h>
> > +#include <linux/pm_opp.h>
> >  #include <linux/regulator/consumer.h>
> > +#include <linux/slab.h>
> >  #include <linux/soc/mediatek/infracfg.h>
> >  #include <linux/soc/mediatek/scpsys-ext.h>
> >
> > @@ -22,6 +24,7 @@
> >  #include <dt-bindings/power/mt7623a-power.h>
> >  #include <dt-bindings/power/mt8173-power.h>
> >  #include <dt-bindings/power/mt8183-power.h>
> > +#include "mtk-scpsys.h"
> >
> >  #define MTK_POLL_DELAY_US   10
> >  #define MTK_POLL_TIMEOUT    (jiffies_to_usecs(HZ))
> > @@ -187,6 +190,18 @@ struct scp_soc_data {
> >         bool bus_prot_reg_update;
> >  };
> >
> > +BLOCKING_NOTIFIER_HEAD(scpsys_notifier_list);
> > +
> > +int register_scpsys_notifier(struct notifier_block *nb)
> > +{
> > +       return blocking_notifier_chain_register(&scpsys_notifier_list, nb);
> > +}
> > +
> > +int unregister_scpsys_notifier(struct notifier_block *nb)
> > +{
> > +       return blocking_notifier_chain_unregister(&scpsys_notifier_list, nb);
> > +}
> > +
> >  static int scpsys_domain_is_on(struct scp_domain *scpd)
> >  {
> >         struct scp *scp = scpd->scp;
> > @@ -536,6 +551,48 @@ static void init_clks(struct platform_device *pdev, struct clk **clk)
> >                 clk[i] = devm_clk_get(&pdev->dev, clk_names[i]);
> >  }
> >
> > +static int mtk_pd_set_performance(struct generic_pm_domain *genpd,
> > +                                 unsigned int state)
> > +{
> > +       int i;
> > +       struct scp_domain *scpd =
> > +               container_of(genpd, struct scp_domain, genpd);
> 
> nit: This (just) fits in 80 chars.
Try again and get 81 chars :)
> 
> > +       struct scp_event_data scpe;
> > +       struct scp *scp = scpd->scp;
> > +       struct genpd_onecell_data *pd_data = &scp->pd_data;
> > +
> > +       for (i = 0; i < pd_data->num_domains; i++) {
> > +               if (genpd == pd_data->domains[i]) {
> > +                       dev_dbg(scp->dev, "%d. %s = %d\n",
> > +                               i, genpd->name, state);
> > +                       break;
> > +               }
> > +       }
> 
> Do we need a sanity check here, if i == pd_data->num_domains?
Oops. It needed, thanks for remind.
> 
> > +
> > +       scpe.event_type = MTK_SCPSYS_PSTATE;
> > +       scpe.genpd = genpd;
> > +       scpe.domain_id = i;
> > +       blocking_notifier_call_chain(&scpsys_notifier_list, state, &scpe);
> > +
> > +       return 0;
> > +}
> > +
> > +static unsigned int mtk_pd_get_performance(struct generic_pm_domain *genpd,
> > +                                          struct dev_pm_opp *opp)
> > +{
> > +       struct device_node *np;
> > +       unsigned int state;
> > +
> > +       np = dev_pm_opp_get_of_node(opp);
> > +
> > +       if (of_property_read_u32(np, "mtk,level", &state))
> > +               return 0;
> > +
> > +       of_node_put(np);
> > +
> > +       return state;
> > +}
> > +
> >  static struct scp *init_scp(struct platform_device *pdev,
> >                         const struct scp_domain_data *scp_domain_data, int num,
> >                         const struct scp_ctrl_reg *scp_ctrl_reg,
> > @@ -659,6 +716,9 @@ static struct scp *init_scp(struct platform_device *pdev,
> >                 genpd->power_on = scpsys_power_on;
> >                 if (MTK_SCPD_CAPS(scpd, MTK_SCPD_ACTIVE_WAKEUP))
> >                         genpd->flags |= GENPD_FLAG_ACTIVE_WAKEUP;
> > +
> > +               genpd->set_performance_state = mtk_pd_set_performance;
> > +               genpd->opp_to_performance_state = mtk_pd_get_performance;
> >         }
> >
> >         return scp;
> > diff --git a/drivers/soc/mediatek/mtk-scpsys.h b/drivers/soc/mediatek/mtk-scpsys.h
> > new file mode 100644
> > index 0000000..c1e8325
> > --- /dev/null
> > +++ b/drivers/soc/mediatek/mtk-scpsys.h
> > @@ -0,0 +1,22 @@
> > +/* SPDX-License-Identifier: GPL-2.0
> > + *
> > + * Copyright (c) 2018 MediaTek Inc.
> > + */
> > +
> > +#ifndef __MTK_SCPSYS_H__
> > +#define __MTK_SCPSYS_H__
> > +
> > +struct scp_event_data {
> > +       int event_type;
> > +       int domain_id;
> > +       struct generic_pm_domain *genpd;
> > +};
> > +
> > +enum scp_event_type {
> > +       MTK_SCPSYS_PSTATE,
> > +};
> > +
> > +int register_scpsys_notifier(struct notifier_block *nb);
> > +int unregister_scpsys_notifier(struct notifier_block *nb);
> > +
> > +#endif /* __MTK_SCPSYS_H__ */
> > --
> > 1.9.1
> >
Nicolas Boichat Jan. 4, 2019, 7:21 a.m. UTC | #3
On Thu, Jan 3, 2019 at 10:16 PM Henry Chen <henryc.chen@mediatek.com> wrote:
>
> On Thu, 2019-01-03 at 09:48 +0800, Nicolas Boichat wrote:
> > On Wed, Jan 2, 2019 at 10:01 PM Henry Chen <henryc.chen@mediatek.com> wrote:
> > >
> > > Support power domain performance state, add header file for scp event.
> > >
> > > Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
> > > ---
> > >  drivers/soc/mediatek/mtk-scpsys.c | 60 +++++++++++++++++++++++++++++++++++++++
> > >  drivers/soc/mediatek/mtk-scpsys.h | 22 ++++++++++++++
> > >  2 files changed, 82 insertions(+)
> > >  create mode 100644 drivers/soc/mediatek/mtk-scpsys.h
> > >
> > > diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> > > index 58d84fe..90102ae 100644
> > > --- a/drivers/soc/mediatek/mtk-scpsys.c
> > > +++ b/drivers/soc/mediatek/mtk-scpsys.c
> > > @@ -11,7 +11,9 @@
> > >  #include <linux/of_device.h>
> > >  #include <linux/platform_device.h>
> > >  #include <linux/pm_domain.h>
> > > +#include <linux/pm_opp.h>
> > >  #include <linux/regulator/consumer.h>
> > > +#include <linux/slab.h>
> > >  #include <linux/soc/mediatek/infracfg.h>
> > >  #include <linux/soc/mediatek/scpsys-ext.h>
> > >
> > > @@ -22,6 +24,7 @@
> > >  #include <dt-bindings/power/mt7623a-power.h>
> > >  #include <dt-bindings/power/mt8173-power.h>
> > >  #include <dt-bindings/power/mt8183-power.h>
> > > +#include "mtk-scpsys.h"
> > >
> > >  #define MTK_POLL_DELAY_US   10
> > >  #define MTK_POLL_TIMEOUT    (jiffies_to_usecs(HZ))
> > > @@ -187,6 +190,18 @@ struct scp_soc_data {
> > >         bool bus_prot_reg_update;
> > >  };
> > >
> > > +BLOCKING_NOTIFIER_HEAD(scpsys_notifier_list);
> > > +
> > > +int register_scpsys_notifier(struct notifier_block *nb)
> > > +{
> > > +       return blocking_notifier_chain_register(&scpsys_notifier_list, nb);
> > > +}
> > > +
> > > +int unregister_scpsys_notifier(struct notifier_block *nb)
> > > +{
> > > +       return blocking_notifier_chain_unregister(&scpsys_notifier_list, nb);
> > > +}
> > > +
> > >  static int scpsys_domain_is_on(struct scp_domain *scpd)
> > >  {
> > >         struct scp *scp = scpd->scp;
> > > @@ -536,6 +551,48 @@ static void init_clks(struct platform_device *pdev, struct clk **clk)
> > >                 clk[i] = devm_clk_get(&pdev->dev, clk_names[i]);
> > >  }
> > >
> > > +static int mtk_pd_set_performance(struct generic_pm_domain *genpd,
> > > +                                 unsigned int state)
> > > +{
> > > +       int i;
> > > +       struct scp_domain *scpd =
> > > +               container_of(genpd, struct scp_domain, genpd);
> >
> > nit: This (just) fits in 80 chars.
> Try again and get 81 chars :)

Really not a big deal, but I did check and I think it fits ,-)

        struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd);
01234567890123456789012345678901234567890123456789012345678901234567890123456789

> >
> > > +       struct scp_event_data scpe;
> > > +       struct scp *scp = scpd->scp;
> > > +       struct genpd_onecell_data *pd_data = &scp->pd_data;
> > > +
> > > +       for (i = 0; i < pd_data->num_domains; i++) {
> > > +               if (genpd == pd_data->domains[i]) {
> > > +                       dev_dbg(scp->dev, "%d. %s = %d\n",
> > > +                               i, genpd->name, state);
> > > +                       break;
> > > +               }
> > > +       }
> >
> > Do we need a sanity check here, if i == pd_data->num_domains?
> Oops. It needed, thanks for remind.
> >
> > > +
> > > +       scpe.event_type = MTK_SCPSYS_PSTATE;
> > > +       scpe.genpd = genpd;
> > > +       scpe.domain_id = i;
> > > +       blocking_notifier_call_chain(&scpsys_notifier_list, state, &scpe);
> > > +
> > > +       return 0;
> > > +}
> > > +
> > > +static unsigned int mtk_pd_get_performance(struct generic_pm_domain *genpd,
> > > +                                          struct dev_pm_opp *opp)
> > > +{
> > > +       struct device_node *np;
> > > +       unsigned int state;
> > > +
> > > +       np = dev_pm_opp_get_of_node(opp);
> > > +
> > > +       if (of_property_read_u32(np, "mtk,level", &state))
> > > +               return 0;
> > > +
> > > +       of_node_put(np);
> > > +
> > > +       return state;
> > > +}
> > > +
> > >  static struct scp *init_scp(struct platform_device *pdev,
> > >                         const struct scp_domain_data *scp_domain_data, int num,
> > >                         const struct scp_ctrl_reg *scp_ctrl_reg,
> > > @@ -659,6 +716,9 @@ static struct scp *init_scp(struct platform_device *pdev,
> > >                 genpd->power_on = scpsys_power_on;
> > >                 if (MTK_SCPD_CAPS(scpd, MTK_SCPD_ACTIVE_WAKEUP))
> > >                         genpd->flags |= GENPD_FLAG_ACTIVE_WAKEUP;
> > > +
> > > +               genpd->set_performance_state = mtk_pd_set_performance;
> > > +               genpd->opp_to_performance_state = mtk_pd_get_performance;
> > >         }
> > >
> > >         return scp;
> > > diff --git a/drivers/soc/mediatek/mtk-scpsys.h b/drivers/soc/mediatek/mtk-scpsys.h
> > > new file mode 100644
> > > index 0000000..c1e8325
> > > --- /dev/null
> > > +++ b/drivers/soc/mediatek/mtk-scpsys.h
> > > @@ -0,0 +1,22 @@
> > > +/* SPDX-License-Identifier: GPL-2.0
> > > + *
> > > + * Copyright (c) 2018 MediaTek Inc.
> > > + */
> > > +
> > > +#ifndef __MTK_SCPSYS_H__
> > > +#define __MTK_SCPSYS_H__
> > > +
> > > +struct scp_event_data {
> > > +       int event_type;
> > > +       int domain_id;
> > > +       struct generic_pm_domain *genpd;
> > > +};
> > > +
> > > +enum scp_event_type {
> > > +       MTK_SCPSYS_PSTATE,
> > > +};
> > > +
> > > +int register_scpsys_notifier(struct notifier_block *nb);
> > > +int unregister_scpsys_notifier(struct notifier_block *nb);
> > > +
> > > +#endif /* __MTK_SCPSYS_H__ */
> > > --
> > > 1.9.1
> > >
>
>

Patch
diff mbox series

diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index 58d84fe..90102ae 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -11,7 +11,9 @@ 
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
+#include <linux/pm_opp.h>
 #include <linux/regulator/consumer.h>
+#include <linux/slab.h>
 #include <linux/soc/mediatek/infracfg.h>
 #include <linux/soc/mediatek/scpsys-ext.h>
 
@@ -22,6 +24,7 @@ 
 #include <dt-bindings/power/mt7623a-power.h>
 #include <dt-bindings/power/mt8173-power.h>
 #include <dt-bindings/power/mt8183-power.h>
+#include "mtk-scpsys.h"
 
 #define MTK_POLL_DELAY_US   10
 #define MTK_POLL_TIMEOUT    (jiffies_to_usecs(HZ))
@@ -187,6 +190,18 @@  struct scp_soc_data {
 	bool bus_prot_reg_update;
 };
 
+BLOCKING_NOTIFIER_HEAD(scpsys_notifier_list);
+
+int register_scpsys_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&scpsys_notifier_list, nb);
+}
+
+int unregister_scpsys_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_unregister(&scpsys_notifier_list, nb);
+}
+
 static int scpsys_domain_is_on(struct scp_domain *scpd)
 {
 	struct scp *scp = scpd->scp;
@@ -536,6 +551,48 @@  static void init_clks(struct platform_device *pdev, struct clk **clk)
 		clk[i] = devm_clk_get(&pdev->dev, clk_names[i]);
 }
 
+static int mtk_pd_set_performance(struct generic_pm_domain *genpd,
+				  unsigned int state)
+{
+	int i;
+	struct scp_domain *scpd =
+		container_of(genpd, struct scp_domain, genpd);
+	struct scp_event_data scpe;
+	struct scp *scp = scpd->scp;
+	struct genpd_onecell_data *pd_data = &scp->pd_data;
+
+	for (i = 0; i < pd_data->num_domains; i++) {
+		if (genpd == pd_data->domains[i]) {
+			dev_dbg(scp->dev, "%d. %s = %d\n",
+				i, genpd->name, state);
+			break;
+		}
+	}
+
+	scpe.event_type = MTK_SCPSYS_PSTATE;
+	scpe.genpd = genpd;
+	scpe.domain_id = i;
+	blocking_notifier_call_chain(&scpsys_notifier_list, state, &scpe);
+
+	return 0;
+}
+
+static unsigned int mtk_pd_get_performance(struct generic_pm_domain *genpd,
+					   struct dev_pm_opp *opp)
+{
+	struct device_node *np;
+	unsigned int state;
+
+	np = dev_pm_opp_get_of_node(opp);
+
+	if (of_property_read_u32(np, "mtk,level", &state))
+		return 0;
+
+	of_node_put(np);
+
+	return state;
+}
+
 static struct scp *init_scp(struct platform_device *pdev,
 			const struct scp_domain_data *scp_domain_data, int num,
 			const struct scp_ctrl_reg *scp_ctrl_reg,
@@ -659,6 +716,9 @@  static struct scp *init_scp(struct platform_device *pdev,
 		genpd->power_on = scpsys_power_on;
 		if (MTK_SCPD_CAPS(scpd, MTK_SCPD_ACTIVE_WAKEUP))
 			genpd->flags |= GENPD_FLAG_ACTIVE_WAKEUP;
+
+		genpd->set_performance_state = mtk_pd_set_performance;
+		genpd->opp_to_performance_state = mtk_pd_get_performance;
 	}
 
 	return scp;
diff --git a/drivers/soc/mediatek/mtk-scpsys.h b/drivers/soc/mediatek/mtk-scpsys.h
new file mode 100644
index 0000000..c1e8325
--- /dev/null
+++ b/drivers/soc/mediatek/mtk-scpsys.h
@@ -0,0 +1,22 @@ 
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (c) 2018 MediaTek Inc.
+ */
+
+#ifndef __MTK_SCPSYS_H__
+#define __MTK_SCPSYS_H__
+
+struct scp_event_data {
+	int event_type;
+	int domain_id;
+	struct generic_pm_domain *genpd;
+};
+
+enum scp_event_type {
+	MTK_SCPSYS_PSTATE,
+};
+
+int register_scpsys_notifier(struct notifier_block *nb);
+int unregister_scpsys_notifier(struct notifier_block *nb);
+
+#endif /* __MTK_SCPSYS_H__ */