diff options
| author | Peng Fan <[email protected]> | 2020-05-03 22:19:50 +0800 |
|---|---|---|
| committer | Stefano Babic <[email protected]> | 2020-05-10 20:55:20 +0200 |
| commit | 951bf19dae2198c7684e4bb3f1eae10ba60d3677 (patch) | |
| tree | 43b5ebce38795d6275b88c836f98127963776ab1 /drivers | |
| parent | b5447b98f24784459225ea0cc2729b1cdb1e3136 (diff) | |
thermal: imx_tmu: Check the TEMP range for iMX8MM
On iMX8MM, the V flag in TRISTR register only reflect the state of SNSR
value, not the calibrated TEMP value. So checking this flag is not
reliable. Per IC suggestion, change to read the TEMP/AVG_TEMP directly
and check whether it in valid range 10-125C.
Signed-off-by: Ye Li <[email protected]>
Signed-off-by: Peng Fan <[email protected]>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/thermal/imx_tmu.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/thermal/imx_tmu.c b/drivers/thermal/imx_tmu.c index 2a08d5085cf..c577b0bd6cd 100644 --- a/drivers/thermal/imx_tmu.c +++ b/drivers/thermal/imx_tmu.c @@ -106,16 +106,24 @@ static int read_temperature(struct udevice *dev, int *temp) ulong drv_data = dev_get_driver_data(dev); u32 val; u32 retry = 10; + u32 valid = 0; do { mdelay(100); retry--; - if (drv_data & FLAGS_VER2) + if (drv_data & FLAGS_VER2) { val = readl(&pdata->regs->regs_v2.tritsr); - else + /* + * Check if TEMP is in valid range, the V bit in TRITSR + * only reflects the RAW uncalibrated data + */ + valid = ((val & 0xff) < 10 || (val & 0xff) > 125) ? 0 : 1; + } else { val = readl(&pdata->regs->regs_v1.site[pdata->id].tritsr); - } while (!(val & 0x80000000) && retry > 0); + valid = val & 0x80000000; + } + } while (!valid && retry > 0); if (retry > 0) *temp = (val & 0xff) * 1000; |