* [PATCH] thermal: imx8mm_thermal: wait for a valid measurement
@ 2022-09-30 10:09 Marcus Folkesson
0 siblings, 0 replies; only message in thread
From: Marcus Folkesson @ 2022-09-30 10:09 UTC (permalink / raw)
To: Rafael J . Wysocki, Daniel Lezcano, Amit Kucheria, Zhang Rui,
Shawn Guo, Sascha Hauer, Pengutronix Kernel Team, Fabio Estevam,
NXP Linux Team, Anson Huang
Cc: linux-pm, linux-arm-kernel, linux-kernel, Marcus Folkesson
Check if first measurement is still pending or if temperature is out of
range.
Return and try again later if that is the case.
Fixes: 5eed800a6811 ("thermal: imx8mm: Add support for i.MX8MM thermal monitoring unit")
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---
drivers/thermal/imx8mm_thermal.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/thermal/imx8mm_thermal.c b/drivers/thermal/imx8mm_thermal.c
index af666bd9e8d4..9dd60b940ef4 100644
--- a/drivers/thermal/imx8mm_thermal.c
+++ b/drivers/thermal/imx8mm_thermal.c
@@ -62,9 +62,15 @@ static int imx8mm_tmu_get_temp(void *data, int *temp)
{
struct tmu_sensor *sensor = data;
struct imx8mm_tmu *tmu = sensor->priv;
- u32 val;
+ bool ready;
+ unsigned long val;
+
+ val = readl_relaxed(tmu->base + TRITSR);
+ ready = test_bit(probe_status_offset(1), &val);
+ if (!ready)
+ return -EAGAIN;
- val = readl_relaxed(tmu->base + TRITSR) & TRITSR_TEMP0_VAL_MASK;
+ val = val & TRITSR_TEMP0_VAL_MASK;
*temp = val * 1000;
if (*temp < VER1_TEMP_LOW_LIMIT)
return -EAGAIN;
--
2.37.1
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2022-09-30 10:09 [PATCH] thermal: imx8mm_thermal: wait for a valid measurement Marcus Folkesson
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