diff mbox series

[v10,09/12] soc: mediatek: Add extra sram control

Message ID 1576657848-14711-10-git-send-email-weiyi.lu@mediatek.com (mailing list archive)
State New, archived
Headers show
Series Mediatek MT8183 scpsys support | expand

Commit Message

Weiyi Lu Dec. 18, 2019, 8:30 a.m. UTC 
For some power domains like vpu_core on MT8183 whose sram need to
do clock and internal isolation while power on/off sram.
We add a flag "sram_iso_ctrl" in scp_domain_data to judge if we
need to do the extra sram isolation control or not.

Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>
---
 drivers/soc/mediatek/mtk-scpsys.c | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

Comments

Nicolas Boichat Dec. 19, 2019, 3:57 a.m. UTC | #1 
On Wed, Dec 18, 2019 at 4:31 PM Weiyi Lu <weiyi.lu@mediatek.com> wrote:
>
> For some power domains like vpu_core on MT8183 whose sram need to
> do clock and internal isolation while power on/off sram.
> We add a flag "sram_iso_ctrl" in scp_domain_data to judge if we
> need to do the extra sram isolation control or not.
>
> Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>

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

> ---
>  drivers/soc/mediatek/mtk-scpsys.c | 24 ++++++++++++++++++++++--
>  1 file changed, 22 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> index 9f06f17..e010fb3 100644
> --- a/drivers/soc/mediatek/mtk-scpsys.c
> +++ b/drivers/soc/mediatek/mtk-scpsys.c
> @@ -56,6 +56,8 @@
>  #define PWR_ON_BIT                     BIT(2)
>  #define PWR_ON_2ND_BIT                 BIT(3)
>  #define PWR_CLK_DIS_BIT                        BIT(4)
> +#define PWR_SRAM_CLKISO_BIT            BIT(5)
> +#define PWR_SRAM_ISOINT_B_BIT          BIT(6)
>
>  #define PWR_STATUS_CONN                        BIT(1)
>  #define PWR_STATUS_DISP                        BIT(3)
> @@ -86,6 +88,8 @@
>   * @name: The domain name.
>   * @sta_mask: The mask for power on/off status bit.
>   * @ctl_offs: The offset for main power control register.
> + * @sram_iso_ctrl: The flag to judge if the power domain need to do
> + *                 the extra sram isolation control.
>   * @sram_pdn_bits: The mask for sram power control bits.
>   * @sram_pdn_ack_bits: The mask for sram power control acked bits.
>   * @basic_clk_name: The basic clocks required by this power domain.
> @@ -98,6 +102,7 @@ struct scp_domain_data {
>         const char *name;
>         u32 sta_mask;
>         int ctl_offs;
> +       bool sram_iso_ctrl;
>         u32 sram_pdn_bits;
>         u32 sram_pdn_ack_bits;
>         const char *basic_clk_name[MAX_CLKS];
> @@ -233,6 +238,14 @@ static int scpsys_sram_enable(struct scp_domain *scpd, void __iomem *ctl_addr)
>                         return ret;
>         }
>
> +       if (scpd->data->sram_iso_ctrl)  {
> +               val = readl(ctl_addr) | PWR_SRAM_ISOINT_B_BIT;
> +               writel(val, ctl_addr);
> +               udelay(1);
> +               val &= ~PWR_SRAM_CLKISO_BIT;
> +               writel(val, ctl_addr);
> +       }
> +
>         return 0;
>  }
>
> @@ -242,8 +255,15 @@ static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr)
>         u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
>         int tmp;
>
> -       val = readl(ctl_addr);
> -       val |= scpd->data->sram_pdn_bits;
> +       if (scpd->data->sram_iso_ctrl)  {
> +               val = readl(ctl_addr) | PWR_SRAM_CLKISO_BIT;
> +               writel(val, ctl_addr);
> +               val &= ~PWR_SRAM_ISOINT_B_BIT;
> +               writel(val, ctl_addr);
> +               udelay(1);
> +       }
> +
> +       val = readl(ctl_addr) | scpd->data->sram_pdn_bits;
>         writel(val, ctl_addr);
>
>         /* Either wait until SRAM_PDN_ACK all 1 or 0 */
> --
> 1.8.1.1.dirty
diff mbox series

Patch

diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index 9f06f17..e010fb3 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -56,6 +56,8 @@ 
 #define PWR_ON_BIT			BIT(2)
 #define PWR_ON_2ND_BIT			BIT(3)
 #define PWR_CLK_DIS_BIT			BIT(4)
+#define PWR_SRAM_CLKISO_BIT		BIT(5)
+#define PWR_SRAM_ISOINT_B_BIT		BIT(6)
 
 #define PWR_STATUS_CONN			BIT(1)
 #define PWR_STATUS_DISP			BIT(3)
@@ -86,6 +88,8 @@ 
  * @name: The domain name.
  * @sta_mask: The mask for power on/off status bit.
  * @ctl_offs: The offset for main power control register.
+ * @sram_iso_ctrl: The flag to judge if the power domain need to do
+ *                 the extra sram isolation control.
  * @sram_pdn_bits: The mask for sram power control bits.
  * @sram_pdn_ack_bits: The mask for sram power control acked bits.
  * @basic_clk_name: The basic clocks required by this power domain.
@@ -98,6 +102,7 @@  struct scp_domain_data {
 	const char *name;
 	u32 sta_mask;
 	int ctl_offs;
+	bool sram_iso_ctrl;
 	u32 sram_pdn_bits;
 	u32 sram_pdn_ack_bits;
 	const char *basic_clk_name[MAX_CLKS];
@@ -233,6 +238,14 @@  static int scpsys_sram_enable(struct scp_domain *scpd, void __iomem *ctl_addr)
 			return ret;
 	}
 
+	if (scpd->data->sram_iso_ctrl)	{
+		val = readl(ctl_addr) | PWR_SRAM_ISOINT_B_BIT;
+		writel(val, ctl_addr);
+		udelay(1);
+		val &= ~PWR_SRAM_CLKISO_BIT;
+		writel(val, ctl_addr);
+	}
+
 	return 0;
 }
 
@@ -242,8 +255,15 @@  static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr)
 	u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
 	int tmp;
 
-	val = readl(ctl_addr);
-	val |= scpd->data->sram_pdn_bits;
+	if (scpd->data->sram_iso_ctrl)	{
+		val = readl(ctl_addr) | PWR_SRAM_CLKISO_BIT;
+		writel(val, ctl_addr);
+		val &= ~PWR_SRAM_ISOINT_B_BIT;
+		writel(val, ctl_addr);
+		udelay(1);
+	}
+
+	val = readl(ctl_addr) | scpd->data->sram_pdn_bits;
 	writel(val, ctl_addr);
 
 	/* Either wait until SRAM_PDN_ACK all 1 or 0 */