[PATCH v5 15/18] thermal: sun8i: allow to use custom temperature calculation function

[Yangtao Li]

From: Icenowy Zheng <icen...@aosc.io>

The H5 temperature calculation function is strange. Firstly, it's
segmented. Secondly, the formula of two sensors are different in the
second segment.

Allow to use a custom temperature calculation function, in case of
the function is complex.

Signed-off-by: Icenowy Zheng <icen...@aosc.io>
---
 drivers/thermal/sun8i_thermal.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index 3259081da841..a761e2afda08 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -76,6 +76,7 @@ struct ths_thermal_chip {
                                     u16 *caldata, int callen);
        int             (*init)(struct ths_device *tmdev);
        int             (*irq_ack)(struct ths_device *tmdev);
+       int             (*calc_temp)(int id, int reg);
 };
 
 struct ths_device {
@@ -90,9 +91,12 @@ struct ths_device {
 
 /* Temp Unit: millidegree Celsius */
 static int sun8i_ths_reg2temp(struct ths_device *tmdev,
-                             int reg)
+                             int id, int reg)
 {
-       return (reg + tmdev->chip->offset) * tmdev->chip->scale;
+       if (tmdev->chip->calc_temp)
+               return tmdev->chip->calc_temp(id, reg);
+       else
+               return (reg + tmdev->chip->offset) * tmdev->chip->scale;
 }
 
 static int sun8i_ths_get_temp(void *data, int *temp)
@@ -108,7 +112,7 @@ static int sun8i_ths_get_temp(void *data, int *temp)
        if (!val)
                return -EAGAIN;
 
-       *temp = sun8i_ths_reg2temp(tmdev, val);
+       *temp = sun8i_ths_reg2temp(tmdev, s->id, val);
        /*
         * XX - According to the original sdk, there are some platforms(rarely)
         * that add a fixed offset value after calculating the temperature
@@ -232,7 +236,7 @@ static int sun50i_h6_ths_calibrate(struct ths_device *tmdev,
 
        for (i = 0; i < tmdev->chip->sensor_num; i++) {
                int reg = (int)caldata[i + 1];
-               int sensor_temp = sun8i_ths_reg2temp(tmdev, reg);
+               int sensor_temp = sun8i_ths_reg2temp(tmdev, i, reg);
                int delta, cdata, offset;
 
                /*
-- 
2.17.1