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Commit 8a1318dd authored by Oliver Wang's avatar Oliver Wang Committed by Gerrit - the friendly Code Review server
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input: sensors: add apds9930 light sensor lux calibration 



Add sensor lux calibration to make sure that it can go to the max
lux value 60000, so the display can adjust color precisely.

CRs-Fixed: 656598
Change-Id: If2270f9d1f23c00f28a6c7519f8a193d9475105c
Signed-off-by: default avatarOliver Wang <mengmeng@codeaurora.org>
parent 3fc0e794

drivers/misc/apds993x.c

+10 −11
Original line number Diff line number Diff line
@@ -55,6 +55,7 @@ 
#define APDS993X_COE_C	70	/* 0.70 without glass window */

#define APDS993X_COE_D	142	/* 1.42 without glass window */

#define APDS993X_DF	52

#define ALS_MAX_RANGE	60000



/* Change History

 *
@@ -268,7 +269,7 @@ static struct sensors_classdev sensors_light_cdev = { 
	.version = 1,

	.handle = SENSORS_LIGHT_HANDLE,

	.type = SENSOR_TYPE_LIGHT,

	.max_range = "30000",

	.max_range = "60000",

	.resolution = "0.0125",

	.sensor_power = "0.20",

	.min_delay = 0, /* in microseconds */
@@ -662,7 +663,7 @@ static int LuxCalculation(struct i2c_client *client, int ch0data, int ch1data) 


	if (ch0data >= apds993x_als_res_tb[data->als_atime_index] ||

	    ch1data >= apds993x_als_res_tb[data->als_atime_index]) {

		luxValue = 30*1000;

		luxValue = data->als_prev_lux;

		return luxValue;

	}
@@ -762,17 +763,16 @@ static void apds993x_change_als_threshold(struct i2c_client *client) 
	luxValue = LuxCalculation(client, ch0data, ch1data);



	if (luxValue >= 0) {

		luxValue = (luxValue < 30000) ? luxValue : 30000;

		luxValue = (luxValue < ALS_MAX_RANGE)

					? luxValue : ALS_MAX_RANGE;

		data->als_prev_lux = luxValue;

	} else {

		/* don't report, the lux is invalid value */

		lux_is_valid = 0;

		luxValue = data->als_prev_lux;

		if (data->als_reduce) {

		if (data->als_reduce)

			lux_is_valid = 1;

			/* report anyway since this is the lowest gain */

			luxValue = 30000;

		}

	}



	/*
@@ -912,17 +912,16 @@ static void apds993x_als_polling_work_handler(struct work_struct *work) 
	luxValue = LuxCalculation(client, ch0data, ch1data);



	if (luxValue >= 0) {

		luxValue = luxValue<30000 ? luxValue : 30000;

		luxValue = (luxValue < ALS_MAX_RANGE)

					? luxValue : ALS_MAX_RANGE;

		data->als_prev_lux = luxValue;

	} else {

		/* don't report, this is invalid lux value */

		lux_is_valid = 0;

		luxValue = data->als_prev_lux;

		if (data->als_reduce) {

		if (data->als_reduce)

			lux_is_valid = 1;

			/* report anyway since this is the lowest gain */

			luxValue = 30000;

		}

	}

	/*

	pr_info("%s: lux=%d ch0data=%d ch1data=%d pdata=%d delay=%d again=%d "
@@ -2428,7 +2427,7 @@ static int apds993x_probe(struct i2c_client *client, 
	set_bit(EV_ABS, data->input_dev_als->evbit);

	set_bit(EV_ABS, data->input_dev_ps->evbit);



	input_set_abs_params(data->input_dev_als, ABS_MISC, 0, 30000, 0, 0);

	input_set_abs_params(data->input_dev_als, ABS_MISC, 0, 60000, 0, 0);

	input_set_abs_params(data->input_dev_ps, ABS_DISTANCE, 0, 1, 0, 0);



	data->input_dev_als->name = "light";