[PATCH v3 7/7] drivers: thermal: tsens: add set_trip support for 8960

[Ansuel Smith]

Add custom set_trip function for 8960 needed to set trip point to the
tsens driver for 8960 driver.

Signed-off-by: Ansuel Smith <ansuels...@gmail.com>
---
 drivers/thermal/qcom/tsens-8960.c | 78 +++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

diff --git a/drivers/thermal/qcom/tsens-8960.c 
b/drivers/thermal/qcom/tsens-8960.c
index b302bfb924a6..f6ed2450a7ba 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -93,6 +93,15 @@
                                                TSENS_8064_SENSOR9_EN | \
                                                TSENS_8064_SENSOR10_EN)
 
+/* Trips: from very hot to very cold */
+enum tsens_trip_type {
+       TSENS_TRIP_STAGE3 = 0,
+       TSENS_TRIP_STAGE2,
+       TSENS_TRIP_STAGE1,
+       TSENS_TRIP_STAGE0,
+       TSENS_TRIP_NUM,
+};
+
 u32 tsens_8960_slope[] = {
                        1176, 1176, 1154, 1176,
                        1111, 1132, 1132, 1199,
@@ -110,6 +119,16 @@ static inline int code_to_mdegC(u32 adc_code, const struct 
tsens_sensor *s)
        return adc_code * slope + offset;
 }
 
+static int mdegC_to_code(int degC, const struct tsens_sensor *s)
+{
+       int slope, offset;
+
+       slope = thermal_zone_get_slope(s->tzd);
+       offset = CAL_MDEGC - slope * s->offset;
+
+       return degC / slope - offset;
+}
+
 static void notify_uspace_tsens_fn(struct work_struct *work)
 {
        struct tsens_sensor *s = container_of(work, struct tsens_sensor,
@@ -447,6 +466,64 @@ static int get_temp_8960(const struct tsens_sensor *s, int 
*temp)
        return -ETIMEDOUT;
 }
 
+static int set_trip_temp_ipq8064(void *data, int trip, int temp)
+{
+       unsigned int reg_th, reg_cntl;
+       int ret, code, code_chk, hi_code, lo_code;
+       const struct tsens_sensor *s = data;
+       struct tsens_priv *priv = s->priv;
+
+       code = mdegC_to_code(temp, s);
+       code_chk = code;
+
+       if (code < THRESHOLD_MIN_CODE || code > THRESHOLD_MAX_CODE)
+               return -EINVAL;
+
+       ret = regmap_read(priv->tm_map, STATUS_CNTL_ADDR_8064, &reg_cntl);
+       if (ret)
+               return ret;
+
+       ret = regmap_read(priv->tm_map, THRESHOLD_ADDR, &reg_th);
+       if (ret)
+               return ret;
+
+       hi_code = (reg_th & THRESHOLD_UPPER_LIMIT_MASK)
+                       >> THRESHOLD_UPPER_LIMIT_SHIFT;
+       lo_code = (reg_th & THRESHOLD_LOWER_LIMIT_MASK)
+                       >> THRESHOLD_LOWER_LIMIT_SHIFT;
+
+       switch (trip) {
+       case TSENS_TRIP_STAGE3:
+               code <<= THRESHOLD_MAX_LIMIT_SHIFT;
+               reg_th &= ~THRESHOLD_MAX_LIMIT_MASK;
+               break;
+       case TSENS_TRIP_STAGE2:
+               if (code_chk <= lo_code)
+                       return -EINVAL;
+               code <<= THRESHOLD_UPPER_LIMIT_SHIFT;
+               reg_th &= ~THRESHOLD_UPPER_LIMIT_MASK;
+               break;
+       case TSENS_TRIP_STAGE1:
+               if (code_chk >= hi_code)
+                       return -EINVAL;
+               code <<= THRESHOLD_LOWER_LIMIT_SHIFT;
+               reg_th &= ~THRESHOLD_LOWER_LIMIT_MASK;
+               break;
+       case TSENS_TRIP_STAGE0:
+               code <<= THRESHOLD_MIN_LIMIT_SHIFT;
+               reg_th &= ~THRESHOLD_MIN_LIMIT_MASK;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       ret = regmap_write(priv->tm_map, THRESHOLD_ADDR, reg_th | code);
+       if (ret)
+               return ret;
+
+       return 0;
+}
+
 static const struct tsens_ops ops_8960 = {
        .init           = init_8960,
        .calibrate      = calibrate_8960,
@@ -455,6 +532,7 @@ static const struct tsens_ops ops_8960 = {
        .disable        = disable_8960,
        .suspend        = suspend_8960,
        .resume         = resume_8960,
+       .set_trip_temp  = set_trip_temp_ipq8064,
 };
 
 struct tsens_plat_data data_8960 = {
-- 
2.27.0