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Message-Id: <20250505231320.2695319-11-sashal@kernel.org>
Date: Mon, 5 May 2025 19:10:58 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Alice Guo <alice.guo@....com>,
Frank Li <Frank.Li@....com>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Sasha Levin <sashal@...nel.org>,
rafael@...nel.org,
linux-pm@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 011/153] thermal/drivers/qoriq: Power down TMU on system suspend
From: Alice Guo <alice.guo@....com>
[ Upstream commit 229f3feb4b0442835b27d519679168bea2de96c2 ]
Enable power-down of TMU (Thermal Management Unit) for TMU version 2 during
system suspend to save power. Save approximately 4.3mW on VDD_ANA_1P8 on
i.MX93 platforms.
Signed-off-by: Alice Guo <alice.guo@....com>
Signed-off-by: Frank Li <Frank.Li@....com>
Link: https://lore.kernel.org/r/20241209164859.3758906-2-Frank.Li@nxp.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/thermal/qoriq_thermal.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
index 73049f9bea252..34a5fbcc3d200 100644
--- a/drivers/thermal/qoriq_thermal.c
+++ b/drivers/thermal/qoriq_thermal.c
@@ -19,6 +19,7 @@
#define SITES_MAX 16
#define TMR_DISABLE 0x0
#define TMR_ME 0x80000000
+#define TMR_CMD BIT(29)
#define TMR_ALPF 0x0c000000
#define TMR_ALPF_V2 0x03000000
#define TMTMIR_DEFAULT 0x0000000f
@@ -345,6 +346,12 @@ static int __maybe_unused qoriq_tmu_suspend(struct device *dev)
if (ret)
return ret;
+ if (data->ver > TMU_VER1) {
+ ret = regmap_set_bits(data->regmap, REGS_TMR, TMR_CMD);
+ if (ret)
+ return ret;
+ }
+
clk_disable_unprepare(data->clk);
return 0;
@@ -359,6 +366,12 @@ static int __maybe_unused qoriq_tmu_resume(struct device *dev)
if (ret)
return ret;
+ if (data->ver > TMU_VER1) {
+ ret = regmap_clear_bits(data->regmap, REGS_TMR, TMR_CMD);
+ if (ret)
+ return ret;
+ }
+
/* Enable monitoring */
return regmap_update_bits(data->regmap, REGS_TMR, TMR_ME, TMR_ME);
}
--
2.39.5
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