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From 1ff9f982051759e0387e8c7e793b49c48eae291d Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Wed, 25 Nov 2020 17:11:05 +0100
Subject: [PATCH 06/10] drivers: thermal: tsens: Replace custom 8960 apis with
generic apis
Rework calibrate function to use common function. Derive the offset from
a missing hardcoded slope table and the data from the nvmem calib
efuses.
Drop custom get_temp function and use generic api.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Acked-by: Thara Gopinath <thara.gopinath@linaro.org>
---
drivers/thermal/qcom/tsens-8960.c | 56 +++++++++----------------------
1 file changed, 15 insertions(+), 41 deletions(-)
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -67,6 +67,13 @@
#define S9_STATUS_OFF 0x3674
#define S10_STATUS_OFF 0x3678
+/* Original slope - 200 to compensate mC to C inaccuracy */
+static u32 tsens_msm8960_slope[] = {
+ 976, 976, 954, 976,
+ 911, 932, 932, 999,
+ 932, 999, 932
+ };
+
static int suspend_8960(struct tsens_priv *priv)
{
int ret;
@@ -194,9 +201,7 @@ static int calibrate_8960(struct tsens_p
{
int i;
char *data;
-
- ssize_t num_read = priv->num_sensors;
- struct tsens_sensor *s = priv->sensor;
+ u32 p1[11];
data = qfprom_read(priv->dev, "calib");
if (IS_ERR(data))
@@ -204,49 +209,18 @@ static int calibrate_8960(struct tsens_p
if (IS_ERR(data))
return PTR_ERR(data);
- for (i = 0; i < num_read; i++, s++)
- s->offset = data[i];
+ for (i = 0; i < priv->num_sensors; i++) {
+ p1[i] = data[i];
+ priv->sensor[i].slope = tsens_msm8960_slope[i];
+ }
+
+ compute_intercept_slope(priv, p1, NULL, ONE_PT_CALIB);
kfree(data);
return 0;
}
-/* Temperature on y axis and ADC-code on x-axis */
-static inline int code_to_mdegC(u32 adc_code, const struct tsens_sensor *s)
-{
- int slope, offset;
-
- slope = thermal_zone_get_slope(s->tzd);
- offset = CAL_MDEGC - slope * s->offset;
-
- return adc_code * slope + offset;
-}
-
-static int get_temp_8960(const struct tsens_sensor *s, int *temp)
-{
- int ret;
- u32 code, trdy;
- struct tsens_priv *priv = s->priv;
- unsigned long timeout;
-
- timeout = jiffies + usecs_to_jiffies(TIMEOUT_US);
- do {
- ret = regmap_read(priv->tm_map, INT_STATUS_ADDR, &trdy);
- if (ret)
- return ret;
- if (!(trdy & TRDY_MASK))
- continue;
- ret = regmap_read(priv->tm_map, s->status, &code);
- if (ret)
- return ret;
- *temp = code_to_mdegC(code, s);
- return 0;
- } while (time_before(jiffies, timeout));
-
- return -ETIMEDOUT;
-}
-
static struct tsens_features tsens_8960_feat = {
.ver_major = VER_0,
.crit_int = 0,
@@ -315,7 +289,7 @@ static const struct reg_field tsens_8960
static const struct tsens_ops ops_8960 = {
.init = init_common,
.calibrate = calibrate_8960,
- .get_temp = get_temp_8960,
+ .get_temp = get_temp_common,
.enable = enable_8960,
.disable = disable_8960,
.suspend = suspend_8960,
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