linux-kernel - [PATCH v1 08/13] soc: mediatek: mtk-svs: add main

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Date:   Mon, 26 Dec 2022 17:42:43 +0800
From:   Roger Lu <roger.lu@...iatek.com>
To:     Matthias Brugger <matthias.bgg@...il.com>,
        Enric Balletbo Serra <eballetbo@...il.com>,
        Kevin Hilman <khilman@...nel.org>,
        Nicolas Boichat <drinkcat@...gle.com>
CC:     Fan Chen <fan.chen@...iatek.com>, Roger Lu <roger.lu@...iatek.com>,
        Jia-wei Chang <jia-wei.chang@...iatek.com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v1 08/13] soc: mediatek: mtk-svs: add main_clk check during system-wide suspend

SVS's main_clk might be disabled in svs_resume(). Therefore, if main_clk
is disabled and svs_suspend() is called by system-wide suspend stage,
return 0 directly.

Signed-off-by: Roger Lu <roger.lu@...iatek.com>
---
 drivers/soc/mediatek/mtk-svs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
index 2c1fbf11b554..934e7ea976b0 100644
--- a/drivers/soc/mediatek/mtk-svs.c
+++ b/drivers/soc/mediatek/mtk-svs.c
@@ -6,6 +6,7 @@
 #include <linux/bitfield.h>
 #include <linux/bits.h>
 #include <linux/clk.h>
+#include <linux/clk-provider.h>
 #include <linux/completion.h>
 #include <linux/cpuidle.h>
 #include <linux/debugfs.h>
@@ -1543,6 +1544,9 @@ static int svs_suspend(struct device *dev)
 	int ret;
 	u32 idx;
 
+	if (!__clk_is_enabled(svsp->main_clk))
+		return 0;
+
 	for (idx = 0; idx < svsp->bank_max; idx++) {
 		svsb = &svsp->banks[idx];
 
-- 
2.18.0