From: Marcus Folkesson <marcus.folkesson@gmail.com>
To: "Rafael J . Wysocki" <rafael@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Amit Kucheria <amitk@kernel.org>, Zhang Rui <rui.zhang@intel.com>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
Anson Huang <Anson.Huang@nxp.com>
Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Marcus Folkesson <marcus.folkesson@gmail.com>
Subject: [PATCH v3] thermal: imx8mm_thermal: validate temperature range
Date: Fri, 14 Oct 2022 09:35:07 +0200 [thread overview]
Message-ID: <20221014073507.1594844-1-marcus.folkesson@gmail.com> (raw)
Check against the upper temperature limit (125 degrees C) before
consider the temperature valid.
Fixes: 5eed800a6811 ("thermal: imx8mm: Add support for i.MX8MM thermal monitoring unit")
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---
Notes:
v2: Also invalidate if temperature > max (125 degrees C)
v3: Only check temperature range as the valid bit is invalid.
drivers/thermal/imx8mm_thermal.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/thermal/imx8mm_thermal.c b/drivers/thermal/imx8mm_thermal.c
index af666bd9e8d4..c5cd873c6e01 100644
--- a/drivers/thermal/imx8mm_thermal.c
+++ b/drivers/thermal/imx8mm_thermal.c
@@ -65,8 +65,14 @@ static int imx8mm_tmu_get_temp(void *data, int *temp)
u32 val;
val = readl_relaxed(tmu->base + TRITSR) & TRITSR_TEMP0_VAL_MASK;
+
+ /*
+ * Do not validate against the V bit (bit 31) due to errata
+ * ERR051272: TMU: Bit 31 of registers TMU_TSCR/TMU_TRITSR/TMU_TRATSR invalid
+ */
+
*temp = val * 1000;
- if (*temp < VER1_TEMP_LOW_LIMIT)
+ if (*temp < VER1_TEMP_LOW_LIMIT || *temp > VER2_TEMP_HIGH_LIMIT)
return -EAGAIN;
return 0;
--
2.37.1
next reply other threads:[~2022-10-14 7:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-14 7:35 Marcus Folkesson [this message]
2022-10-14 7:56 ` [PATCH v3] thermal: imx8mm_thermal: validate temperature range Jacky Bai
2022-10-17 7:25 ` Daniel Lezcano
2022-10-17 8:06 ` Peng Fan
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