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thermal: rockchip: fixes the code_to_temp for tsadc driver

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We should judge the table.id[mid].code insearch algorithm on matter the
adc value increment or decrement.

Or otherwise, the temperature return the incorrect value in some cases.
[    1.438589] adc_val=402,temp=-40000
[    1.438903] adc_val=403,temp=-39375
[    1.439217] adc_val=404,temp=-38750
...
[    1.441102] adc_val=410,temp=-40000
[    1.441416] adc_val=411,temp=-34445
[    1.441737] adc_val=412,temp=-33889
...

Let's fix it right now.

Fixes commit 020ba95dbb ("thermal: rockchip:
Add the sort mode for adc value increment or decrement").

Reported-by: Rocky Hao <[email protected]>
Signed-off-by: Caesar Wang <[email protected]>
Cc: Zhang Rui <[email protected]>
Cc: Eduardo Valentin <[email protected]>
Cc: Heiko Stuebner <[email protected]>
Signed-off-by: Eduardo Valentin <[email protected]>
This commit is contained in:
Caesar Wang 2016-04-18 11:35:54 +08:00 • committed by Eduardo Valentin
commit a87dd79761
1 changed files with 2 additions and 2 deletions
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4
drivers/thermal/rockchip_thermal.c
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@ -405,8 +405,8 @@ static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
return -EAGAIN; /* Incorrect reading */
while (low <= high) {
if (code >= table.id[mid - 1].code &&
code < table.id[mid].code)
if (code <= table.id[mid].code &&
code > table.id[mid - 1].code)
break;
else if (code > table.id[mid].code)
low = mid + 1;