From d37edc7370273306d8747097fafa62436c1cfe16 Mon Sep 17 00:00:00 2001
From: Marcus Folkesson <marcus.folkesson@gmail.com>
Date: Fri, 14 Oct 2022 09:35:07 +0200
Subject: [PATCH] thermal/drivers/imx8mm_thermal: Validate temperature range
Git-commit: d37edc7370273306d8747097fafa62436c1cfe16
Patch-mainline: v6.2-rc1
References: git-fixes
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>
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Link: https://lore.kernel.org/r/20221014073507.1594844-1-marcus.folkesson@gmail.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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 68608d8e5e29..182cc207afe9 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;
--
2.35.3