linux-kernel - [PATCH 03/13] pmdomain: mediatek: Support power on bypass

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Message-ID: <20250307034454.12243-4-guangjie.song@mediatek.com>
Date: Fri, 7 Mar 2025 11:44:27 +0800
From: Guangjie Song <guangjie.song@...iatek.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Matthias Brugger
	<matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Ulf Hansson
	<ulf.hansson@...aro.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	<linux-pm@...r.kernel.org>, Guangjie Song <guangjie.song@...iatek.com>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH 03/13] pmdomain: mediatek: Support power on bypass

Support power on bypass in pmdomain driver probe.

Signed-off-by: Guangjie Song <guangjie.song@...iatek.com>
---
 drivers/pmdomain/mediatek/mtk-scpsys.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/pmdomain/mediatek/mtk-scpsys.c b/drivers/pmdomain/mediatek/mtk-scpsys.c
index 9d03249284d6..3c8b5d8e7ee9 100644
--- a/drivers/pmdomain/mediatek/mtk-scpsys.c
+++ b/drivers/pmdomain/mediatek/mtk-scpsys.c
@@ -27,6 +27,7 @@
 #define MTK_SCPD_FWAIT_SRAM		BIT(1)
 #define MTK_SCPD_SRAM_ISO		BIT(2)
 #define MTK_SCPD_SRAM_SLP		BIT(3)
+#define MTK_SCPD_BYPASS_INIT_ON		BIT(4)
 #define MTK_SCPD_CAPS(_scpd, _x)	((_scpd)->data->caps & (_x))
 
 #define SPM_VDE_PWR_CON			0x0210
@@ -569,7 +570,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
 		 * software.  The unused domains will be switched off during
 		 * late_init time.
 		 */
-		on = !WARN_ON(genpd->power_on(genpd) < 0);
+		if (MTK_SCPD_CAPS(scpd, MTK_SCPD_BYPASS_INIT_ON))
+			on = false;
+		else
+			on = !WARN_ON(genpd->power_on(genpd) < 0);
 
 		pm_genpd_init(genpd, NULL, !on);
 	}
-- 
2.45.2