[PATCH v12 07/10] soc: mediatek: Add extra sram control
From: Weiyi Lu <hidden>
Date: 2020-02-17 03:35:40
Also in:
linux-mediatek, lkml
Subsystem:
arm/mediatek soc support, the rest · Maintainers:
Matthias Brugger, AngeloGioacchino Del Regno, Linus Torvalds
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 <redacted> --- 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 2a9478f..98cc5ed 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c@@ -26,6 +26,7 @@ #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
@@ -57,6 +58,8 @@ #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)
@@ -234,6 +237,14 @@ 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; }
@@ -243,8 +254,15 @@ 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
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