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 020ba95
"thermal: rockchip: Add the sort mode for adc value increment or decrement"

Change-Id: Icac84d06ebf463439ca11db5a19d629b4b2b865c
Reported-by: Rocky Hao <rocky.hao@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>

diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
index b79d5ee931221bcacf1f30802fa0d5c63b2376a8..df29c2d925b9000a7517d6564e760e4e36c6558f 100644 (file)
--- a/drivers/thermal/rockchip_thermal.c
+++ b/drivers/thermal/rockchip_thermal.c
@@ -418,8 +418,8 @@ 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;