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Commit a2e940bc authored by Asha Magadi Venkateshamurthy's avatar Asha Magadi Venkateshamurthy Committed by Shilpa Suresh
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iio: adc: spmi-vadc: Add adc support for SPF targets 



Update the channel type and scaling function for the VADC
channels that are used by legacy SPF targets.

Change-Id: I6637388ace022c5726a8f00fb1f8c0eb98c39f5c
Signed-off-by: default avatarAsha Magadi Venkateshamurthy <amagad@codeaurora.org>
Signed-off-by: default avatarArchana Sriram <apsrir@codeaurora.org>
parent a5eb56f5

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

+9 −17
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * Copyright (c) 2012-2016,2021, The Linux Foundation. All rights reserved.

 */



#include <linux/bitops.h>
@@ -560,19 +552,19 @@ static const struct vadc_channels vadc_chans[] = { 
	VADC_CHAN_NO_SCALE(SPARE1_03, 1)

	VADC_CHAN_NO_SCALE(USB_ID_MV, 1)

	VADC_CHAN_VOLT(VCOIN, 1, SCALE_DEFAULT)

	VADC_CHAN_NO_SCALE(VBAT_SNS, 1)

	VADC_CHAN_VOLT(VBAT_SNS, 1, SCALE_DEFAULT)

	VADC_CHAN_VOLT(VSYS, 1, SCALE_DEFAULT)

	VADC_CHAN_TEMP(DIE_TEMP, 0, SCALE_PMIC_THERM)

	VADC_CHAN_VOLT(REF_625MV, 0, SCALE_DEFAULT)

	VADC_CHAN_VOLT(REF_1250MV, 0, SCALE_DEFAULT)

	VADC_CHAN_NO_SCALE(CHG_TEMP, 0)

	VADC_CHAN_NO_SCALE(SPARE1, 0)

	VADC_CHAN_VOLT(SPARE1, 0, SCALE_DEFAULT)

	VADC_CHAN_TEMP(SPARE2, 0, SCALE_PMI_CHG_TEMP)

	VADC_CHAN_VOLT(GND_REF, 0, SCALE_DEFAULT)

	VADC_CHAN_VOLT(VDD_VADC, 0, SCALE_DEFAULT)



	VADC_CHAN_NO_SCALE(P_MUX1_1_1, 0)

	VADC_CHAN_NO_SCALE(P_MUX2_1_1, 0)

	VADC_CHAN_TEMP(P_MUX2_1_1, 0, SCALE_THERM_100K_PULLUP)

	VADC_CHAN_NO_SCALE(P_MUX3_1_1, 0)

	VADC_CHAN_NO_SCALE(P_MUX4_1_1, 0)

	VADC_CHAN_NO_SCALE(P_MUX5_1_1, 0)
@@ -606,18 +598,18 @@ static const struct vadc_channels vadc_chans[] = { 
	VADC_CHAN_NO_SCALE(P_MUX16_1_3, 1)



	VADC_CHAN_NO_SCALE(LR_MUX1_BAT_THERM, 0)

	VADC_CHAN_NO_SCALE(LR_MUX2_BAT_ID, 0)

	VADC_CHAN_NO_SCALE(LR_MUX3_XO_THERM, 0)

	VADC_CHAN_VOLT(LR_MUX2_BAT_ID, 0, SCALE_DEFAULT)

	VADC_CHAN_TEMP(LR_MUX3_XO_THERM, 0, SCALE_THERM_100K_PULLUP)

	VADC_CHAN_NO_SCALE(LR_MUX4_AMUX_THM1, 0)

	VADC_CHAN_NO_SCALE(LR_MUX5_AMUX_THM2, 0)

	VADC_CHAN_NO_SCALE(LR_MUX6_AMUX_THM3, 0)

	VADC_CHAN_NO_SCALE(LR_MUX7_HW_ID, 0)

	VADC_CHAN_TEMP(LR_MUX7_HW_ID, 0, SCALE_THERM_100K_PULLUP)

	VADC_CHAN_NO_SCALE(LR_MUX8_AMUX_THM4, 0)

	VADC_CHAN_NO_SCALE(LR_MUX9_AMUX_THM5, 0)

	VADC_CHAN_NO_SCALE(LR_MUX10_USB_ID, 0)

	VADC_CHAN_NO_SCALE(AMUX_PU1, 0)

	VADC_CHAN_NO_SCALE(AMUX_PU2, 0)

	VADC_CHAN_NO_SCALE(LR_MUX3_BUF_XO_THERM, 0)

	VADC_CHAN_TEMP(LR_MUX3_BUF_XO_THERM, 0, SCALE_THERM_100K_PULLUP)



	VADC_CHAN_NO_SCALE(LR_MUX1_PU1_BAT_THERM, 0)

	VADC_CHAN_NO_SCALE(LR_MUX2_PU1_BAT_ID, 0)

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

+86 −0
Original line number Diff line number Diff line
@@ -759,6 +759,61 @@ static const struct vadc_map_pt adcmap7_100k[] = { 
	{ 2420, 130048 }

};



/* Voltage to temperature */

static const struct vadc_map_pt adcmap_batt_therm_qrd_215[] = {

	{1575,  -200},

	{1549,  -180},

	{1522,  -160},

	{1493,  -140},

	{1463,  -120},

	{1431,  -100},

	{1398,  -80},

	{1364,  -60},

	{1329,  -40},

	{1294,  -20},

	{1258,  0},

	{1222,  20},

	{1187,  40},

	{1151,  60},

	{1116,  80},

	{1082,  100},

	{1049,  120},

	{1016,  140},

	{985,   160},

	{955,   180},

	{926,   200},

	{899,   220},

	{873,   240},

	{849,   260},

	{825,   280},

	{804,   300},

	{783,   320},

	{764,   340},

	{746,   360},

	{729,   380},

	{714,   400},

	{699,   420},

	{686,   440},

	{673,   460},

	{662,   480},

	{651,   500},

	{641,   520},

	{632,   540},

	{623,   560},

	{615,   580},

	{608,   600},

	{601,   620},

	{595,   640},

	{589,   660},

	{583,   680},

	{578,   700},

	{574,   720},

	{569,   740},

	{565,   760},

	{562,   780},

	{558,   800}

};



static int qcom_vadc_map_voltage_temp(const struct vadc_map_pt *pts,

				      u32 tablesize, s32 input, s64 *output)

{
@@ -830,6 +885,10 @@ static int qcom_vadc_scale_volt(const struct vadc_linear_graph *calib_graph, 


	voltage = voltage * prescale->den;

	result = div64_s64(voltage, prescale->num);



	if (!absolute)

		result *= 1000;



	*result_uv = result;



	return 0;
@@ -860,6 +919,29 @@ static int qcom_vadc_scale_therm(const struct vadc_linear_graph *calib_graph, 
	return 0;

}



static int qcom_vadc_scale_therm_qrd_215(

				const struct vadc_linear_graph *calib_graph,

				const struct vadc_prescale_ratio *prescale,

				bool absolute, u16 adc_code,

				int *result_mdec)

{

	s64 voltage = 0, result = 0;

	int ret;



	qcom_vadc_scale_calib(calib_graph, adc_code, absolute, &voltage);



	ret = qcom_vadc_map_voltage_temp(adcmap_batt_therm_qrd_215,

					 ARRAY_SIZE(adcmap_batt_therm_qrd_215),

					 voltage, &result);

	if (ret)

		return ret;



	*result_mdec = result;



	return 0;

}





static int qcom_vadc_scale_die_temp(const struct vadc_linear_graph *calib_graph,

				    const struct vadc_prescale_ratio *prescale,

				    bool absolute,
@@ -1307,6 +1389,10 @@ int qcom_vadc_scale(enum vadc_scale_fn_type scaletype, 
		return qcom_vadc_scale_therm(calib_graph, prescale,

					     absolute, adc_code,

					     result);

	case SCALE_BATT_THERM_QRD_215:

		return qcom_vadc_scale_therm_qrd_215(calib_graph, prescale,

					     absolute, adc_code,

					     result);

	case SCALE_PMIC_THERM:

		return qcom_vadc_scale_die_temp(calib_graph, prescale,

						absolute, adc_code,

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

+1 −0
Original line number Diff line number Diff line
@@ -198,6 +198,7 @@ enum vadc_scale_fn_type { 
	SCALE_HW_CALIB_PM2250_S3_DIE_TEMP,

	SCALE_HW_CALIB_THERM_100K_PU_PM7,

	SCALE_HW_CALIB_PMIC_THERM_PM7,

	SCALE_BATT_THERM_QRD_215,

	SCALE_HW_CALIB_MAX,

};