linux-kernel - [PATCH 5.15 182/846] thermal/drivers/imx8mm: Enable ADC when enabling monitor

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Message-Id: <20220124184107.256945987@linuxfoundation.org>
Date:   Mon, 24 Jan 2022 19:34:59 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Paul Gerber <Paul.Gerber@...group.com>,
        Alexander Stein <alexander.stein@...tq-group.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 182/846] thermal/drivers/imx8mm: Enable ADC when enabling monitor

From: Paul Gerber <Paul.Gerber@...group.com>

[ Upstream commit 3de89d8842a2b5d3dd22ebf97dd561ae0a330948 ]

The i.MX 8MP has a ADC_PD bit in the TMU_TER register that controls the
operating mode of the ADC:
* 0 means normal operating mode
* 1 means power down mode

When enabling/disabling the TMU, the ADC operating mode must be set
accordingly.

i.MX 8M Mini & Nano are lacking this bit.

Signed-off-by: Paul Gerber <Paul.Gerber@...group.com>
Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>
Fixes: 2b8f1f0337c5 ("thermal: imx8mm: Add i.MX8MP support")
Link: https://lore.kernel.org/r/20211122114225.196280-1-alexander.stein@ew.tq-group.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/thermal/imx8mm_thermal.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/thermal/imx8mm_thermal.c b/drivers/thermal/imx8mm_thermal.c
index 7442e013738f8..af666bd9e8d4d 100644
--- a/drivers/thermal/imx8mm_thermal.c
+++ b/drivers/thermal/imx8mm_thermal.c
@@ -21,6 +21,7 @@
 #define TPS			0x4
 #define TRITSR			0x20	/* TMU immediate temp */
 
+#define TER_ADC_PD		BIT(30)
 #define TER_EN			BIT(31)
 #define TRITSR_TEMP0_VAL_MASK	0xff
 #define TRITSR_TEMP1_VAL_MASK	0xff0000
@@ -113,6 +114,8 @@ static void imx8mm_tmu_enable(struct imx8mm_tmu *tmu, bool enable)
 
 	val = readl_relaxed(tmu->base + TER);
 	val = enable ? (val | TER_EN) : (val & ~TER_EN);
+	if (tmu->socdata->version == TMU_VER2)
+		val = enable ? (val & ~TER_ADC_PD) : (val | TER_ADC_PD);
 	writel_relaxed(val, tmu->base + TER);
 }
 
-- 
2.34.1