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Commit ace4dec3 authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
Browse files

iio: qcom-spmi-adc5: add CHG_TEMP channel for PMIC7 



Add support to read CHG_TEMP channel on PM8350B to get charger
temperature.

Change-Id: I33c69e56d47b0ab37772df8d55eae2ab0c5bad86
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent b6d73800

drivers/iio/adc/qcom-spmi-adc5.c

+2 −0
Original line number Diff line number Diff line
@@ -675,6 +675,8 @@ static const struct adc5_channels adc7_chans_pmic[ADC5_MAX_CHANNEL] = { 
					SCALE_HW_CALIB_DEFAULT)

	[ADC7_AMUX_THM3]	= ADC5_CHAN_TEMP("smb_temp", 0,

					SCALE_HW_CALIB_PM7_SMB_TEMP)

	[ADC7_CHG_TEMP]		= ADC5_CHAN_TEMP("chg_temp", 0,

					SCALE_HW_CALIB_PM7_CHG_TEMP)

	[ADC7_DIE_TEMP]		= ADC5_CHAN_TEMP("die_temp", 0,

					SCALE_HW_CALIB_PMIC_THERM_PM7)

	[ADC7_AMUX_THM1_100K_PU]	= ADC5_CHAN_TEMP("amux_thm1_pu2", 0,

drivers/iio/adc/qcom-vadc-common.c

+25 −0
Original line number Diff line number Diff line
@@ -548,6 +548,10 @@ static int qcom_vadc_scale_hw_chg5_temp( 
				const struct vadc_prescale_ratio *prescale,

				const struct adc5_data *data,

				u16 adc_code, int *result_mdec);

static int qcom_vadc_scale_hw_pm7_chg_temp(

				const struct vadc_prescale_ratio *prescale,

				const struct adc5_data *data,

				u16 adc_code, int *result_mdec);

static int qcom_vadc_scale_hw_calib_die_temp(

				const struct vadc_prescale_ratio *prescale,

				const struct adc5_data *data,
@@ -576,6 +580,7 @@ static struct qcom_adc5_scale_type scale_adc5_fn[] = { 
	[SCALE_HW_CALIB_PM5_SMB_TEMP] = {qcom_vadc_scale_hw_smb_temp},

	[SCALE_HW_CALIB_PM5_SMB1398_TEMP] = {qcom_vadc_scale_hw_smb1398_temp},

	[SCALE_HW_CALIB_PM7_SMB_TEMP] = {qcom_vadc_scale_hw_pm7_smb_temp},

	[SCALE_HW_CALIB_PM7_CHG_TEMP] = {qcom_vadc_scale_hw_pm7_chg_temp},

};



static int qcom_vadc_map_voltage_temp(const struct vadc_map_pt *pts,
@@ -897,6 +902,26 @@ static int qcom_vadc7_scale_hw_calib_die_temp( 
	return 0;

}



static int qcom_vadc_scale_hw_pm7_chg_temp(

				const struct vadc_prescale_ratio *prescale,

				const struct adc5_data *data,

				u16 adc_code, int *result_mdec)

{

	s64 temp;

	int result_uv;



	result_uv = qcom_vadc_scale_code_voltage_factor(adc_code,

				prescale, data, 1);



	/* T(C) = Vadc/0.0033 – 277.12 */

	temp = div_s64((30303LL * result_uv) - (27712 * 1000000LL), 100000);

	pr_debug("adc_code: %u result_uv: %d temp: %lld\n", adc_code, result_uv,

		temp);

	*result_mdec = temp > 0 ? temp : 0;



	return 0;

}



static int qcom_vadc_scale_hw_pm7_smb_temp(

				const struct vadc_prescale_ratio *prescale,

				const struct adc5_data *data,

drivers/iio/adc/qcom-vadc-common.h

+3 −0
Original line number Diff line number Diff line
@@ -144,6 +144,8 @@ struct vadc_prescale_ratio { 
 *	The hardware applies offset/slope to adc code. This is for PMIC7.

 * SCALE_HW_CALIB_PM7_SMB_TEMP: Returns result in millidegrees for PMIC7

 *	SMB139x temperature.

 * SCALE_HW_CALIB_PM7_CHG_TEMP: Returns result in millidegrees for PMIC7

 *	charger temperature.

 */

enum vadc_scale_fn_type {

	SCALE_DEFAULT = 0,
@@ -165,6 +167,7 @@ enum vadc_scale_fn_type { 
	SCALE_HW_CALIB_THERM_100K_PU_PM7,

	SCALE_HW_CALIB_PMIC_THERM_PM7,

	SCALE_HW_CALIB_PM7_SMB_TEMP,

	SCALE_HW_CALIB_PM7_CHG_TEMP,

	SCALE_HW_CALIB_INVALID,

};