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 cap "MTK_SCPD_SRAM_ISO" to judge if we need to do
the extra sram isolation control or not.
Signed-off-by: Weiyi Lu <[email protected]>
Reviewed-by: Nicolas Boichat <[email protected]>
---
drivers/soc/mediatek/mtk-scpsys.c | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index ef2c668..ef46e31 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -25,6 +25,7 @@
#define MTK_SCPD_ACTIVE_WAKEUP BIT(0)
#define MTK_SCPD_FWAIT_SRAM BIT(1)
+#define MTK_SCPD_SRAM_ISO BIT(2)
#define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x))
#define SPM_VDE_PWR_CON 0x0210
@@ -56,6 +57,8 @@
#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)
@@ -290,6 +293,14 @@ static int scpsys_sram_enable(struct scp_domain *scpd, void __iomem *ctl_addr)
return ret;
}
+ if (MTK_SCPD_CAPS(scpd, MTK_SCPD_SRAM_ISO)) {
+ 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;
}
@@ -299,8 +310,15 @@ 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 (MTK_SCPD_CAPS(scpd, MTK_SCPD_SRAM_ISO)) {
+ 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