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Commit 387fd20c authored by Jie Cheng's avatar Jie Cheng
Browse files

thermal: qpnp-adc-tm: add new scale function for skuh battery thermistor 



The skuh is using the different battery thermistor and mapping table from
the default. A new scale function is needed to use this mapping table in
the thermal adc driver.

Change-Id: I63fb02244b55b51d967b85a90cc700ef1764d20d
Signed-off-by: default avatarJie Cheng <rockiec@codeaurora.org>
parent 32a565cb

Documentation/devicetree/bindings/thermal/qpnp-adc-tm.txt

+1 −0
Original line number Diff line number Diff line
@@ -79,6 +79,7 @@ Required properties: 
			4 : Scaling to convert smb_batt_therm values to raw ADC code.

			5 : Scaling to perform reverse calibration for absolute voltage from uV

			    to raw ADC code.

			6 : Scaling to convert qrd skuh battery decidegC to raw ADC code.

- qcom,hw-settle-time : Settling period for the channel before ADC read.

			Select from the following unsigned int.

			0 : 0us

drivers/hwmon/qpnp-adc-common.c

+53 −0
Original line number Diff line number Diff line
@@ -1204,6 +1204,59 @@ int32_t qpnp_adc_btm_scaler(struct qpnp_vadc_chip *chip, 
}

EXPORT_SYMBOL(qpnp_adc_btm_scaler);



int32_t qpnp_adc_qrd_skuh_btm_scaler(struct qpnp_vadc_chip *chip,

		struct qpnp_adc_tm_btm_param *param,

		uint32_t *low_threshold, uint32_t *high_threshold)

{

	struct qpnp_vadc_linear_graph btm_param;

	int64_t low_output = 0, high_output = 0;

	int rc = 0;



	qpnp_get_vadc_gain_and_offset(chip, &btm_param, CALIB_RATIOMETRIC);



	pr_debug("warm_temp:%d and cool_temp:%d\n", param->high_temp,

				param->low_temp);

	rc = qpnp_adc_map_voltage_temp(

		adcmap_qrd_skuh_btm_threshold,

		ARRAY_SIZE(adcmap_qrd_skuh_btm_threshold),

		(param->low_temp),

		&low_output);

	if (rc) {

		pr_debug("low_temp mapping failed with %d\n", rc);

		return rc;

	}



	pr_debug("low_output:%lld\n", low_output);

	low_output *= btm_param.dy;

	do_div(low_output, btm_param.adc_vref);

	low_output += btm_param.adc_gnd;



	rc = qpnp_adc_map_voltage_temp(

		adcmap_qrd_skuh_btm_threshold,

		ARRAY_SIZE(adcmap_qrd_skuh_btm_threshold),

		(param->high_temp),

		&high_output);

	if (rc) {

		pr_debug("high temp mapping failed with %d\n", rc);

		return rc;

	}



	pr_debug("high_output:%lld\n", high_output);

	high_output *= btm_param.dy;

	do_div(high_output, btm_param.adc_vref);

	high_output += btm_param.adc_gnd;



	/* btm low temperature correspondes to high voltage threshold */

	*low_threshold = high_output;

	/* btm high temperature correspondes to low voltage threshold */

	*high_threshold = low_output;



	pr_debug("high_volt:%d, low_volt:%d\n", *high_threshold,

				*low_threshold);

	return 0;

}

EXPORT_SYMBOL(qpnp_adc_qrd_skuh_btm_scaler);



int32_t qpnp_adc_smb_btm_rscaler(struct qpnp_vadc_chip *chip,

		struct qpnp_adc_tm_btm_param *param,

		uint32_t *low_threshold, uint32_t *high_threshold)

drivers/thermal/qpnp-adc-tm.c

+1 −0
Original line number Diff line number Diff line
@@ -288,6 +288,7 @@ static struct qpnp_adc_tm_reverse_scale_fn adc_tm_rscale_fn[] = { 
	[SCALE_RPMIC_THERM] = {qpnp_adc_scale_millidegc_pmic_voltage_thr},

	[SCALE_R_SMB_BATT_THERM] = {qpnp_adc_smb_btm_rscaler},

	[SCALE_R_ABSOLUTE] = {qpnp_adc_absolute_rthr},

	[SCALE_QRD_SKUH_RBATT_THERM] = {qpnp_adc_qrd_skuh_btm_scaler},

};



static int32_t qpnp_adc_tm_read_reg(struct qpnp_adc_tm_chip *chip,

include/linux/qpnp/qpnp-adc.h

+22 −0
Original line number Diff line number Diff line
@@ -269,6 +269,7 @@ enum qpnp_adc_tm_rscale_fn_type { 
	SCALE_RPMIC_THERM,

	SCALE_R_SMB_BATT_THERM,

	SCALE_R_ABSOLUTE,

	SCALE_QRD_SKUH_RBATT_THERM,

	SCALE_RSCALE_NONE,

};
@@ -1358,6 +1359,23 @@ int32_t qpnp_adc_scale_millidegc_pmic_voltage_thr(struct qpnp_vadc_chip *dev, 
int32_t qpnp_adc_btm_scaler(struct qpnp_vadc_chip *dev,

		struct qpnp_adc_tm_btm_param *param,

		uint32_t *low_threshold, uint32_t *high_threshold);



/**

 * qpnp_adc_qrd_skuh_btm_scaler() - Performs reverse calibration on the low/high

 *		temperature threshold values passed by the client.

 *		The function maps the temperature to voltage and applies

 *		ratiometric calibration on the voltage values for SKUH board.

 * @dev:	Structure device for qpnp vadc

 * @param:	The input parameters that contain the low/high temperature

 *		values.

 * @low_threshold: The low threshold value that needs to be updated with

 *		the above calibrated voltage value.

 * @high_threshold: The low threshold value that needs to be updated with

 *		the above calibrated voltage value.

 */

int32_t qpnp_adc_qrd_skuh_btm_scaler(struct qpnp_vadc_chip *dev,

		struct qpnp_adc_tm_btm_param *param,

		uint32_t *low_threshold, uint32_t *high_threshold);

/**

 * qpnp_adc_tm_scale_therm_voltage_pu2() - Performs reverse calibration

 *		and convert given temperature to voltage on supported
@@ -1580,6 +1598,10 @@ static inline int32_t qpnp_adc_btm_scaler(struct qpnp_vadc_chip *dev, 
		struct qpnp_adc_tm_btm_param *param,

		uint32_t *low_threshold, uint32_t *high_threshold)

{ return -ENXIO; }

static inline int32_t qpnp_adc_qrd_skuh_btm_scaler(struct qpnp_vadc_chip *dev,

		struct qpnp_adc_tm_btm_param *param,

		uint32_t *low_threshold, uint32_t *high_threshold)

{ return -ENXIO; }

static inline int32_t qpnp_adc_scale_millidegc_pmic_voltage_thr(

		struct qpnp_vadc_chip *dev,

		struct qpnp_adc_tm_btm_param *param,