linux-kernel - [PATCH v2] pmdomain: mediatek: Add MT8188 buck isolation setting

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Date: Fri, 29 Mar 2024 12:38:40 +0800
From: Fei Shao <fshao@...omium.org>
To: Ulf Hansson <ulf.hansson@...aro.org>
Cc: Johnson Wang <johnson.wang@...iatek.com>,
	Fei Shao <fshao@...omium.org>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-mediatek@...ts.infradead.org,
	linux-pm@...r.kernel.org
Subject: [PATCH v2] pmdomain: mediatek: Add MT8188 buck isolation setting

From: Johnson Wang <johnson.wang@...iatek.com>

From: Johnson Wang <johnson.wang@...iatek.com>

Add buck isolation setting to ADSP_AO, CAM_VCORE and IMG_VCORE power
domains in MT8188 for proper buck isolation control in power domain
on/off.

Signed-off-by: Johnson Wang <johnson.wang@...iatek.com>
Signed-off-by: Fei Shao <fshao@...omium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---

Changes in v2:
[1] was reviewed but didn't get accepted at the time.
This rebases [1] on next-20240327 with revised commit message.

[1]: https://lore.kernel.org/all/20230315114505.25144-1-johnson.wang@mediatek.com/

 drivers/pmdomain/mediatek/mt8188-pm-domains.h | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/pmdomain/mediatek/mt8188-pm-domains.h b/drivers/pmdomain/mediatek/mt8188-pm-domains.h
index 06834ab6597c..007235be9efe 100644
--- a/drivers/pmdomain/mediatek/mt8188-pm-domains.h
+++ b/drivers/pmdomain/mediatek/mt8188-pm-domains.h
@@ -175,6 +175,8 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
 		.ctl_offs = 0x35C,
 		.pwr_sta_offs = 0x16C,
 		.pwr_sta2nd_offs = 0x170,
+		.ext_buck_iso_offs = 0x3EC,
+		.ext_buck_iso_mask = BIT(10),
 		.bp_cfg = {
 			BUS_PROT_WR(INFRA,
 				    MT8188_TOP_AXI_PROT_EN_2_ADSP_AO_STEP1,
@@ -187,7 +189,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
 				    MT8188_TOP_AXI_PROT_EN_2_CLR,
 				    MT8188_TOP_AXI_PROT_EN_2_STA),
 		},
-		.caps = MTK_SCPD_ALWAYS_ON,
+		.caps = MTK_SCPD_ALWAYS_ON | MTK_SCPD_EXT_BUCK_ISO,
 	},
 	[MT8188_POWER_DOMAIN_ADSP_INFRA] = {
 		.name = "adsp_infra",
@@ -524,6 +526,8 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
 		.ctl_offs = 0x3A4,
 		.pwr_sta_offs = 0x16C,
 		.pwr_sta2nd_offs = 0x170,
+		.ext_buck_iso_offs = 0x3EC,
+		.ext_buck_iso_mask = BIT(12),
 		.bp_cfg = {
 			BUS_PROT_WR(INFRA,
 				    MT8188_TOP_AXI_PROT_EN_MM_IMG_VCORE_STEP1,
@@ -541,7 +545,8 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
 				    MT8188_TOP_AXI_PROT_EN_MM_2_CLR,
 				    MT8188_TOP_AXI_PROT_EN_MM_2_STA),
 		},
-		.caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_DOMAIN_SUPPLY,
+		.caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_DOMAIN_SUPPLY |
+			MTK_SCPD_EXT_BUCK_ISO,
 	},
 	[MT8188_POWER_DOMAIN_IMG_MAIN] = {
 		.name = "img_main",
@@ -591,6 +596,8 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
 		.ctl_offs = 0x3A0,
 		.pwr_sta_offs = 0x16C,
 		.pwr_sta2nd_offs = 0x170,
+		.ext_buck_iso_offs = 0x3EC,
+		.ext_buck_iso_mask = BIT(11),
 		.bp_cfg = {
 			BUS_PROT_WR(INFRA,
 				    MT8188_TOP_AXI_PROT_EN_MM_CAM_VCORE_STEP1,
@@ -618,7 +625,8 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
 				    MT8188_TOP_AXI_PROT_EN_MM_2_CLR,
 				    MT8188_TOP_AXI_PROT_EN_MM_2_STA),
 		},
-		.caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_DOMAIN_SUPPLY,
+		.caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_DOMAIN_SUPPLY |
+			MTK_SCPD_EXT_BUCK_ISO,
 	},
 	[MT8188_POWER_DOMAIN_CAM_MAIN] = {
 		.name = "cam_main",
-- 
2.44.0.478.gd926399ef9-goog