| Message ID | 20221007073057.41803-1-marcus.folkesson@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] thermal: imx8mm_thermal: wait for a valid measurement | expand |
On 10/7/2022 3:30 PM, Marcus Folkesson wrote: > 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> NAK: Please refer: https://www.nxp.com/docs/en/errata/IMX8MM_0N87W.pdf ERR051272: TMU: Bit 31 of registers TMU_TSCR/TMU_TRITSR/TMU_TRATSR invalid Thanks, Peng. > --- > > Notes: > v2: Also invalidate if temperature > max (125 degrees C) > > drivers/thermal/imx8mm_thermal.c | 12 +++++++++--- > 1 file changed, 9 insertions(+), 3 deletions(-) > > diff --git a/drivers/thermal/imx8mm_thermal.c b/drivers/thermal/imx8mm_thermal.c > index af666bd9e8d4..e42bf373cebc 100644 > --- a/drivers/thermal/imx8mm_thermal.c > +++ b/drivers/thermal/imx8mm_thermal.c > @@ -62,11 +62,17 @@ 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) > + if (*temp < VER1_TEMP_LOW_LIMIT || *temp > VER2_TEMP_HIGH_LIMIT) > return -EAGAIN; > > return 0;
Hi Peng, On Fri, Oct 14, 2022 at 09:20:21AM +0800, Peng Fan wrote: > > > On 10/7/2022 3:30 PM, Marcus Folkesson wrote: > > 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> > > NAK: > Please refer: https://www.nxp.com/docs/en/errata/IMX8MM_0N87W.pdf > ERR051272: TMU: Bit 31 of registers TMU_TSCR/TMU_TRITSR/TMU_TRATSR invalid I see, thank you. I think it is still worth to check the upper limit though, so I will send a patch for that. > > Thanks, > Peng. Best regards, Marcus Folkesson
diff --git a/drivers/thermal/imx8mm_thermal.c b/drivers/thermal/imx8mm_thermal.c index af666bd9e8d4..e42bf373cebc 100644 --- a/drivers/thermal/imx8mm_thermal.c +++ b/drivers/thermal/imx8mm_thermal.c @@ -62,11 +62,17 @@ 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) + if (*temp < VER1_TEMP_LOW_LIMIT || *temp > VER2_TEMP_HIGH_LIMIT) return -EAGAIN; return 0;
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> --- Notes: v2: Also invalidate if temperature > max (125 degrees C) drivers/thermal/imx8mm_thermal.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)