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| author | Caesar Wang <wxt@rock-chips.com> | 2016-04-18 11:35:54 +0800 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2016-05-17 07:28:32 -0700 |
| commit | a87dd79761764accbb5f66a6ff089701fbac4b32 (patch) | |
| tree | 7d228f6703c7c77cadda1329bb22f9649c41c303 /drivers/thermal/rockchip_thermal.c | |
| parent | ab5b52f1606f3a83e541102adf5d50e7a9bfdef5 (diff) | |
| download | linux-a87dd79761764accbb5f66a6ff089701fbac4b32.tar.gz linux-a87dd79761764accbb5f66a6ff089701fbac4b32.tar.bz2 linux-a87dd79761764accbb5f66a6ff089701fbac4b32.zip | |
thermal: rockchip: fixes the code_to_temp for tsadc driver
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 020ba95dbbbe ("thermal: rockchip:
Add the sort mode for adc value increment or decrement").
Reported-by: Rocky Hao <rocky.hao@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal/rockchip_thermal.c')
| -rw-r--r-- | drivers/thermal/rockchip_thermal.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c index f4c4bcd7c6e4..658772f5691c 100644 --- a/drivers/thermal/rockchip_thermal.c +++ b/drivers/thermal/rockchip_thermal.c @@ -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; |