This is a note to let you know that I've just added the patch titled thermal/drivers/imx8mm_thermal: Validate temperature range to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: thermal-drivers-imx8mm_thermal-validate-temperature-.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 000f7d1612861a2bce7d59048eb8eab45b2eab8d Author: Marcus Folkesson <marcus.folkesson@xxxxxxxxx> Date: Fri Oct 14 09:35:07 2022 +0200 thermal/drivers/imx8mm_thermal: Validate temperature range [ Upstream commit d37edc7370273306d8747097fafa62436c1cfe16 ] 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@xxxxxxxxx> Reviewed-by: Jacky Bai <ping.bai@xxxxxxx> Link: https://lore.kernel.org/r/20221014073507.1594844-1-marcus.folkesson@xxxxxxxxx Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> 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;