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LF-14924 thermal: imx91: change the register DATA0 read value type

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Read the temperature returns "Resource temporarily unavailable" when
it's below 0 degree. Because the register DATA0 is a 16-bit signed value,
but the origin code converted directly unsigned 32-bit into a signed
32-bit value.

This patch adds a new 16-bit signed variable and uses readw to replace
readl.

Signed-off-by: Yanan Yang <yanan.yang@nxp.com>
Signed-off-by: Joy Zou <joy.zou@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
Acked-by: Jason Liu <jason.hui.liu@nxp.com>
This commit is contained in:
Yanan Yang 2025-03-20 11:24:09 +09:00 committed by Jason Liu
parent 316c686548
commit 8835cd9bec
1 changed files with 3 additions and 2 deletions
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5
drivers/thermal/imx91_thermal.c
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@ -106,6 +106,7 @@ static int imx91_tmu_get_temp(struct thermal_zone_device *tz, int *temp)
struct imx91_tmu *tmu = sensor->priv;
u32 val;
int ret;
int16_t data;
ret = readl_relaxed_poll_timeout(tmu->base + STAT0, val,
val & STAT0_DRDY0_IF_MASK, 1000,
@ -113,8 +114,8 @@ static int imx91_tmu_get_temp(struct thermal_zone_device *tz, int *temp)
if (ret)
return -EAGAIN;
val = readl_relaxed(tmu->base + DATA0) & 0xffffU;
*temp = (int)val * 1000LL / 64LL;
data = readw_relaxed(tmu->base + DATA0);
*temp = data * 1000 / 64;
if (*temp < TMU_TEMP_LOW_LIMIT || *temp > TMU_TEMP_HIGH_LIMIT)
return -EAGAIN;