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thermal/drivers/imx8mm_thermal: Validate temperature range

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[ Upstream commit d37edc7370 ]

Check against the upper temperature limit (125 degrees C) before
consider the temperature valid.

Fixes: 5eed800a68 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Marcus Folkesson 2022-10-14 09:35:07 +02:00 • committed by Greg Kroah-Hartman
commit c56c1449cc
1 changed files with 7 additions and 1 deletions
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8
drivers/thermal/imx8mm_thermal.c
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@ -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;