diff options
Diffstat (limited to 'drivers/thermal/rzg2l_thermal.c')
| -rw-r--r-- | drivers/thermal/rzg2l_thermal.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/thermal/rzg2l_thermal.c b/drivers/thermal/rzg2l_thermal.c index be07e04c6926..51ae80eda6af 100644 --- a/drivers/thermal/rzg2l_thermal.c +++ b/drivers/thermal/rzg2l_thermal.c @@ -47,7 +47,7 @@ #define TS_CODE_AVE_SCALE(x) ((x) * 1000000) #define MCELSIUS(temp) ((temp) * MILLIDEGREE_PER_DEGREE) -#define TS_CODE_CAP_TIMES 8 /* Capture times */ +#define TS_CODE_CAP_TIMES 8 /* Total number of ADC data samples */ #define RZG2L_THERMAL_GRAN 500 /* milli Celsius */ #define RZG2L_TSU_SS_TIMEOUT_US 1000 @@ -80,7 +80,8 @@ static int rzg2l_thermal_get_temp(void *devdata, int *temp) int val, i; for (i = 0; i < TS_CODE_CAP_TIMES ; i++) { - /* TSU repeats measurement at 20 microseconds intervals and + /* + * TSU repeats measurement at 20 microseconds intervals and * automatically updates the results of measurement. As per * the HW manual for measuring temperature we need to read 8 * values consecutively and then take the average. @@ -92,16 +93,18 @@ static int rzg2l_thermal_get_temp(void *devdata, int *temp) ts_code_ave = result / TS_CODE_CAP_TIMES; - /* Calculate actual sensor value by applying curvature correction formula + /* + * Calculate actual sensor value by applying curvature correction formula * dsensor = ts_code_ave / (1 + ts_code_ave * 0.000013). Here we are doing * integer calculation by scaling all the values by 1000000. */ dsensor = TS_CODE_AVE_SCALE(ts_code_ave) / (TS_CODE_AVE_SCALE(1) + (ts_code_ave * CURVATURE_CORRECTION_CONST)); - /* The temperature Tj is calculated by the formula + /* + * The temperature Tj is calculated by the formula * Tj = (dsensor − calib1) * 165/ (calib0 − calib1) − 40 - * where calib0 and calib1 are the caliberation values. + * where calib0 and calib1 are the calibration values. */ val = ((dsensor - priv->calib1) * (MCELSIUS(165) / (priv->calib0 - priv->calib1))) - MCELSIUS(40); @@ -122,7 +125,8 @@ static int rzg2l_thermal_init(struct rzg2l_thermal_priv *priv) rzg2l_thermal_write(priv, TSU_SM, TSU_SM_NORMAL_MODE); rzg2l_thermal_write(priv, TSU_ST, 0); - /* Before setting the START bit, TSU should be in normal operating + /* + * Before setting the START bit, TSU should be in normal operating * mode. As per the HW manual, it will take 60 µs to place the TSU * into normal operating mode. */ @@ -217,7 +221,7 @@ static int rzg2l_thermal_probe(struct platform_device *pdev) if (ret) goto err; - dev_dbg(dev, "TSU probed with %s caliberation values", + dev_dbg(dev, "TSU probed with %s calibration values", rzg2l_thermal_read(priv, OTPTSUTRIM_REG(0)) ? "hw" : "sw"); return 0; |