diff mbox series

[v5,07/14] soc: mediatek: Refactor sram control

Message ID 20190319080140.24055-8-weiyi.lu@mediatek.com (mailing list archive)
State New, archived
Headers show
Series Mediatek MT8183 scpsys support | expand

Commit Message

Weiyi Lu March 19, 2019, 8:01 a.m. UTC 
Put sram enable and disable control in separate functions.

Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>
---
 drivers/soc/mediatek/mtk-scpsys.c | 79 ++++++++++++++++++++-----------
 1 file changed, 51 insertions(+), 28 deletions(-)

Comments

Nicolas Boichat March 19, 2019, 12:07 p.m. UTC | #1 
On Tue, Mar 19, 2019 at 4:02 PM Weiyi Lu <weiyi.lu@mediatek.com> wrote:
>
> Put sram enable and disable control in separate functions.
>
> Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>

Refactoring looks ok, just a small comment.

Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

> ---
>  drivers/soc/mediatek/mtk-scpsys.c | 79 ++++++++++++++++++++-----------
>  1 file changed, 51 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> index 3e9be07a2627..65b734b40098 100644
> --- a/drivers/soc/mediatek/mtk-scpsys.c
> +++ b/drivers/soc/mediatek/mtk-scpsys.c
> @@ -235,12 +235,55 @@ static void scpsys_clk_disable(struct clk *clk[], int max_num)
>         }
>  }
>
> +static int scpsys_sram_enable(struct scp_domain *scpd, void __iomem *ctl_addr)
> +{
> +       u32 val;
> +       u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
> +       int tmp;
> +
> +       val = readl(ctl_addr) & ~scpd->data->sram_pdn_bits;
> +       writel(val, ctl_addr);
> +
> +       /* Either wait until SRAM_PDN_ACK all 0 or have a force wait */
> +       if (MTK_SCPD_CAPS(scpd, MTK_SCPD_FWAIT_SRAM)) {
> +               /*
> +                * Currently, MTK_SCPD_FWAIT_SRAM is necessary only for
> +                * MT7622_POWER_DOMAIN_WB and thus just a trivial setup
> +                * is applied here.
> +                */
> +               usleep_range(12000, 12100);

Does the range really need to be so tight? Would 12000, 13000 also be ok?

> +       } else {
> +               /* Either wait until SRAM_PDN_ACK all 1 or 0 */
> +               int ret = readl_poll_timeout(ctl_addr, tmp,
> +                               (tmp & pdn_ack) == 0,
> +                               MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> +               if (ret < 0)
> +                       return ret;
> +       }
> +
> +       return 0;
> +}
> +
> +static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr)
> +{
> +       u32 val;
> +       u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
> +       int tmp;
> +
> +       val = readl(ctl_addr) | scpd->data->sram_pdn_bits;
> +       writel(val, ctl_addr);
> +
> +       /* Either wait until SRAM_PDN_ACK all 1 or 0 */
> +       return readl_poll_timeout(ctl_addr, tmp,
> +                       (tmp & pdn_ack) == pdn_ack,
> +                       MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> +}
> +
>  static int scpsys_power_on(struct generic_pm_domain *genpd)
>  {
>         struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd);
>         struct scp *scp = scpd->scp;
>         void __iomem *ctl_addr = scp->base + scpd->data->ctl_offs;
> -       u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
>         u32 val;
>         int ret, tmp;
>
> @@ -252,6 +295,7 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
>         if (ret)
>                 goto err_clk;
>
> +       /* subsys power on */
>         val = readl(ctl_addr);
>         val |= PWR_ON_BIT;
>         writel(val, ctl_addr);
> @@ -273,24 +317,9 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
>         val |= PWR_RST_B_BIT;
>         writel(val, ctl_addr);
>
> -       val &= ~scpd->data->sram_pdn_bits;
> -       writel(val, ctl_addr);
> -
> -       /* Either wait until SRAM_PDN_ACK all 0 or have a force wait */
> -       if (MTK_SCPD_CAPS(scpd, MTK_SCPD_FWAIT_SRAM)) {
> -               /*
> -                * Currently, MTK_SCPD_FWAIT_SRAM is necessary only for
> -                * MT7622_POWER_DOMAIN_WB and thus just a trivial setup is
> -                * applied here.
> -                */
> -               usleep_range(12000, 12100);
> -
> -       } else {
> -               ret = readl_poll_timeout(ctl_addr, tmp, (tmp & pdn_ack) == 0,
> -                                        MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> -               if (ret < 0)
> -                       goto err_pwr_ack;
> -       }
> +       ret = scpsys_sram_enable(scpd, ctl_addr);
> +       if (ret < 0)
> +               goto err_pwr_ack;
>
>         if (scpd->data->bus_prot_mask) {
>                 ret = mtk_infracfg_clear_bus_protection(scp->infracfg,
> @@ -317,7 +346,6 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
>         struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd);
>         struct scp *scp = scpd->scp;
>         void __iomem *ctl_addr = scp->base + scpd->data->ctl_offs;
> -       u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
>         u32 val;
>         int ret, tmp;
>
> @@ -329,17 +357,12 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
>                         goto out;
>         }
>
> -       val = readl(ctl_addr);
> -       val |= scpd->data->sram_pdn_bits;
> -       writel(val, ctl_addr);
> -
> -       /* wait until SRAM_PDN_ACK all 1 */
> -       ret = readl_poll_timeout(ctl_addr, tmp, (tmp & pdn_ack) == pdn_ack,
> -                                MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> +       ret = scpsys_sram_disable(scpd, ctl_addr);
>         if (ret < 0)
>                 goto out;
>
> -       val |= PWR_ISO_BIT;
> +       /* subsys power off */
> +       val = readl(ctl_addr) | PWR_ISO_BIT;
>         writel(val, ctl_addr);
>
>         val &= ~PWR_RST_B_BIT;
> --
> 2.18.0
>
Weiyi Lu June 19, 2019, 9:30 a.m. UTC | #2 
On Tue, 2019-03-19 at 20:07 +0800, Nicolas Boichat wrote:
> On Tue, Mar 19, 2019 at 4:02 PM Weiyi Lu <weiyi.lu@mediatek.com> wrote:
> >
> > Put sram enable and disable control in separate functions.
> >
> > Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>
> 
> Refactoring looks ok, just a small comment.
> 
> Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
> 
> > ---
> >  drivers/soc/mediatek/mtk-scpsys.c | 79 ++++++++++++++++++++-----------
> >  1 file changed, 51 insertions(+), 28 deletions(-)
> >
> > diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> > index 3e9be07a2627..65b734b40098 100644
> > --- a/drivers/soc/mediatek/mtk-scpsys.c
> > +++ b/drivers/soc/mediatek/mtk-scpsys.c
> > @@ -235,12 +235,55 @@ static void scpsys_clk_disable(struct clk *clk[], int max_num)
> >         }
> >  }
> >
> > +static int scpsys_sram_enable(struct scp_domain *scpd, void __iomem *ctl_addr)
> > +{
> > +       u32 val;
> > +       u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
> > +       int tmp;
> > +
> > +       val = readl(ctl_addr) & ~scpd->data->sram_pdn_bits;
> > +       writel(val, ctl_addr);
> > +
> > +       /* Either wait until SRAM_PDN_ACK all 0 or have a force wait */
> > +       if (MTK_SCPD_CAPS(scpd, MTK_SCPD_FWAIT_SRAM)) {
> > +               /*
> > +                * Currently, MTK_SCPD_FWAIT_SRAM is necessary only for
> > +                * MT7622_POWER_DOMAIN_WB and thus just a trivial setup
> > +                * is applied here.
> > +                */
> > +               usleep_range(12000, 12100);
> 
> Does the range really need to be so tight? Would 12000, 13000 also be ok?
> 

I think Sean could give you a more accurate answer.

Hi Sean, would you mind answering this question?

> > +       } else {
> > +               /* Either wait until SRAM_PDN_ACK all 1 or 0 */
> > +               int ret = readl_poll_timeout(ctl_addr, tmp,
> > +                               (tmp & pdn_ack) == 0,
> > +                               MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> > +               if (ret < 0)
> > +                       return ret;
> > +       }
> > +
> > +       return 0;
> > +}
> > +
> > +static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr)
> > +{
> > +       u32 val;
> > +       u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
> > +       int tmp;
> > +
> > +       val = readl(ctl_addr) | scpd->data->sram_pdn_bits;
> > +       writel(val, ctl_addr);
> > +
> > +       /* Either wait until SRAM_PDN_ACK all 1 or 0 */
> > +       return readl_poll_timeout(ctl_addr, tmp,
> > +                       (tmp & pdn_ack) == pdn_ack,
> > +                       MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> > +}
> > +
> >  static int scpsys_power_on(struct generic_pm_domain *genpd)
> >  {
> >         struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd);
> >         struct scp *scp = scpd->scp;
> >         void __iomem *ctl_addr = scp->base + scpd->data->ctl_offs;
> > -       u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
> >         u32 val;
> >         int ret, tmp;
> >
> > @@ -252,6 +295,7 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
> >         if (ret)
> >                 goto err_clk;
> >
> > +       /* subsys power on */
> >         val = readl(ctl_addr);
> >         val |= PWR_ON_BIT;
> >         writel(val, ctl_addr);
> > @@ -273,24 +317,9 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
> >         val |= PWR_RST_B_BIT;
> >         writel(val, ctl_addr);
> >
> > -       val &= ~scpd->data->sram_pdn_bits;
> > -       writel(val, ctl_addr);
> > -
> > -       /* Either wait until SRAM_PDN_ACK all 0 or have a force wait */
> > -       if (MTK_SCPD_CAPS(scpd, MTK_SCPD_FWAIT_SRAM)) {
> > -               /*
> > -                * Currently, MTK_SCPD_FWAIT_SRAM is necessary only for
> > -                * MT7622_POWER_DOMAIN_WB and thus just a trivial setup is
> > -                * applied here.
> > -                */
> > -               usleep_range(12000, 12100);
> > -
> > -       } else {
> > -               ret = readl_poll_timeout(ctl_addr, tmp, (tmp & pdn_ack) == 0,
> > -                                        MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> > -               if (ret < 0)
> > -                       goto err_pwr_ack;
> > -       }
> > +       ret = scpsys_sram_enable(scpd, ctl_addr);
> > +       if (ret < 0)
> > +               goto err_pwr_ack;
> >
> >         if (scpd->data->bus_prot_mask) {
> >                 ret = mtk_infracfg_clear_bus_protection(scp->infracfg,
> > @@ -317,7 +346,6 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
> >         struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd);
> >         struct scp *scp = scpd->scp;
> >         void __iomem *ctl_addr = scp->base + scpd->data->ctl_offs;
> > -       u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
> >         u32 val;
> >         int ret, tmp;
> >
> > @@ -329,17 +357,12 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
> >                         goto out;
> >         }
> >
> > -       val = readl(ctl_addr);
> > -       val |= scpd->data->sram_pdn_bits;
> > -       writel(val, ctl_addr);
> > -
> > -       /* wait until SRAM_PDN_ACK all 1 */
> > -       ret = readl_poll_timeout(ctl_addr, tmp, (tmp & pdn_ack) == pdn_ack,
> > -                                MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> > +       ret = scpsys_sram_disable(scpd, ctl_addr);
> >         if (ret < 0)
> >                 goto out;
> >
> > -       val |= PWR_ISO_BIT;
> > +       /* subsys power off */
> > +       val = readl(ctl_addr) | PWR_ISO_BIT;
> >         writel(val, ctl_addr);
> >
> >         val &= ~PWR_RST_B_BIT;
> > --
> > 2.18.0
> >
diff mbox series

Patch

diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index 3e9be07a2627..65b734b40098 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -235,12 +235,55 @@  static void scpsys_clk_disable(struct clk *clk[], int max_num)
 	}
 }
 
+static int scpsys_sram_enable(struct scp_domain *scpd, void __iomem *ctl_addr)
+{
+	u32 val;
+	u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
+	int tmp;
+
+	val = readl(ctl_addr) & ~scpd->data->sram_pdn_bits;
+	writel(val, ctl_addr);
+
+	/* Either wait until SRAM_PDN_ACK all 0 or have a force wait */
+	if (MTK_SCPD_CAPS(scpd, MTK_SCPD_FWAIT_SRAM)) {
+		/*
+		 * Currently, MTK_SCPD_FWAIT_SRAM is necessary only for
+		 * MT7622_POWER_DOMAIN_WB and thus just a trivial setup
+		 * is applied here.
+		 */
+		usleep_range(12000, 12100);
+	} else {
+		/* Either wait until SRAM_PDN_ACK all 1 or 0 */
+		int ret = readl_poll_timeout(ctl_addr, tmp,
+				(tmp & pdn_ack) == 0,
+				MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr)
+{
+	u32 val;
+	u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
+	int tmp;
+
+	val = readl(ctl_addr) | scpd->data->sram_pdn_bits;
+	writel(val, ctl_addr);
+
+	/* Either wait until SRAM_PDN_ACK all 1 or 0 */
+	return readl_poll_timeout(ctl_addr, tmp,
+			(tmp & pdn_ack) == pdn_ack,
+			MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+}
+
 static int scpsys_power_on(struct generic_pm_domain *genpd)
 {
 	struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd);
 	struct scp *scp = scpd->scp;
 	void __iomem *ctl_addr = scp->base + scpd->data->ctl_offs;
-	u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
 	u32 val;
 	int ret, tmp;
 
@@ -252,6 +295,7 @@  static int scpsys_power_on(struct generic_pm_domain *genpd)
 	if (ret)
 		goto err_clk;
 
+	/* subsys power on */
 	val = readl(ctl_addr);
 	val |= PWR_ON_BIT;
 	writel(val, ctl_addr);
@@ -273,24 +317,9 @@  static int scpsys_power_on(struct generic_pm_domain *genpd)
 	val |= PWR_RST_B_BIT;
 	writel(val, ctl_addr);
 
-	val &= ~scpd->data->sram_pdn_bits;
-	writel(val, ctl_addr);
-
-	/* Either wait until SRAM_PDN_ACK all 0 or have a force wait */
-	if (MTK_SCPD_CAPS(scpd, MTK_SCPD_FWAIT_SRAM)) {
-		/*
-		 * Currently, MTK_SCPD_FWAIT_SRAM is necessary only for
-		 * MT7622_POWER_DOMAIN_WB and thus just a trivial setup is
-		 * applied here.
-		 */
-		usleep_range(12000, 12100);
-
-	} else {
-		ret = readl_poll_timeout(ctl_addr, tmp, (tmp & pdn_ack) == 0,
-					 MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
-		if (ret < 0)
-			goto err_pwr_ack;
-	}
+	ret = scpsys_sram_enable(scpd, ctl_addr);
+	if (ret < 0)
+		goto err_pwr_ack;
 
 	if (scpd->data->bus_prot_mask) {
 		ret = mtk_infracfg_clear_bus_protection(scp->infracfg,
@@ -317,7 +346,6 @@  static int scpsys_power_off(struct generic_pm_domain *genpd)
 	struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd);
 	struct scp *scp = scpd->scp;
 	void __iomem *ctl_addr = scp->base + scpd->data->ctl_offs;
-	u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
 	u32 val;
 	int ret, tmp;
 
@@ -329,17 +357,12 @@  static int scpsys_power_off(struct generic_pm_domain *genpd)
 			goto out;
 	}
 
-	val = readl(ctl_addr);
-	val |= scpd->data->sram_pdn_bits;
-	writel(val, ctl_addr);
-
-	/* wait until SRAM_PDN_ACK all 1 */
-	ret = readl_poll_timeout(ctl_addr, tmp, (tmp & pdn_ack) == pdn_ack,
-				 MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+	ret = scpsys_sram_disable(scpd, ctl_addr);
 	if (ret < 0)
 		goto out;
 
-	val |= PWR_ISO_BIT;
+	/* subsys power off */
+	val = readl(ctl_addr) | PWR_ISO_BIT;
 	writel(val, ctl_addr);
 
 	val &= ~PWR_RST_B_BIT;