Re: [PATCH v10 6/8] drivers: thermal: tsens: Use get_temp_common for msm8960
From: Thara Gopinath <hidden>
Date: 2021-03-18 21:16:43
Also in:
linux-arm-msm, linux-pm, lkml
On 2/17/21 2:40 PM, Ansuel Smith wrote:
Rework calibrate function to use common function. Derive the offset from a missing hardcoded slope table and the data from the nvmem calib efuses.
You are also changing get_temp to use get_temp_common instead of get_temp_8960 in this patch. Please add it to commit description as well.I will also consider changing the subject header to something more generic like "drivers: thermal: tsens: Replace custom 8960 apis with generic apis" or anything better. Otherwise, Acked-by: Thara Gopinath <redacted> Warm Regards Thara
quoted hunk ↗ jump to hunk
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> --- drivers/thermal/qcom/tsens-8960.c | 56 +++++++++---------------------- 1 file changed, 15 insertions(+), 41 deletions(-)diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c index 248aaa65b5b0..43ebe4d54672 100644 --- 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 */ +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;@@ -192,9 +199,7 @@ static int calibrate_8960(struct tsens_priv *priv) { 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))@@ -202,49 +207,18 @@ static int calibrate_8960(struct tsens_priv *priv) 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,@@ -313,7 +287,7 @@ static const struct reg_field tsens_8960_regfields[MAX_REGFIELDS] = { 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,