From: Marcus Folkesson marcus.folkesson@gmail.com
[ 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@gmail.com Reviewed-by: Jacky Bai ping.bai@nxp.com Link: https://lore.kernel.org/r/20221014073507.1594844-1-marcus.folkesson@gmail.co... Signed-off-by: Daniel Lezcano daniel.lezcano@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 0f4cabd2a8c6..6be16e0598b6 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;