of_batterydata: Pass battery id directly to find battery profile
Currently power supply name is passed to get the battery profile
in of_batterydata_get_best_profile(). This creates a dependency
of waiting for the driver that has the power supply class device.
Improve this by passing the battery id directly to the API. This
way, getting battery id will be the responsibility of caller.
CRs-Fixed: 1043798
Change-Id: I7a8c2b2fcc9b43e2e858114f7312fccf96dc3f78
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 7810bad..52a297d 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -118,4 +118,9 @@
config OF_NUMA
bool
+config OF_BATTERYDATA
+ def_bool y
+ help
+ OpenFirmware BatteryData accessors
+
endif # OF
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index 4b8dabe..b2f474a 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -15,5 +15,6 @@
obj-$(CONFIG_OF_OVERLAY) += overlay.o
obj-$(CONFIG_OF_SLIMBUS) += of_slimbus.o
obj-$(CONFIG_OF_NUMA) += of_numa.o
+obj-$(CONFIG_OF_BATTERYDATA) += of_batterydata.o
obj-$(CONFIG_OF_UNITTEST) += unittest-data/
diff --git a/drivers/of/of_batterydata.c b/drivers/of/of_batterydata.c
new file mode 100644
index 0000000..43417b2
--- /dev/null
+++ b/drivers/of/of_batterydata.c
@@ -0,0 +1,457 @@
+/* Copyright (c) 2013-2017, 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.
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/batterydata-lib.h>
+#include <linux/power_supply.h>
+
+static int of_batterydata_read_lut(const struct device_node *np,
+ int max_cols, int max_rows, int *ncols, int *nrows,
+ int *col_legend_data, int *row_legend_data,
+ int *lut_data)
+{
+ struct property *prop;
+ const __be32 *data;
+ int cols, rows, size, i, j, *out_values;
+
+ prop = of_find_property(np, "qcom,lut-col-legend", NULL);
+ if (!prop) {
+ pr_err("%s: No col legend found\n", np->name);
+ return -EINVAL;
+ } else if (!prop->value) {
+ pr_err("%s: No col legend value found, np->name\n", np->name);
+ return -ENODATA;
+ } else if (prop->length > max_cols * sizeof(int)) {
+ pr_err("%s: Too many columns\n", np->name);
+ return -EINVAL;
+ }
+
+ cols = prop->length/sizeof(int);
+ *ncols = cols;
+ data = prop->value;
+ for (i = 0; i < cols; i++)
+ *col_legend_data++ = be32_to_cpup(data++);
+
+ rows = 0;
+
+ prop = of_find_property(np, "qcom,lut-row-legend", NULL);
+ if (!prop || row_legend_data == NULL) {
+ /* single row lut */
+ rows = 1;
+ } else if (!prop->value) {
+ pr_err("%s: No row legend value found\n", np->name);
+ return -ENODATA;
+ } else if (prop->length > max_rows * sizeof(int)) {
+ pr_err("%s: Too many rows\n", np->name);
+ return -EINVAL;
+ }
+
+ if (rows != 1) {
+ rows = prop->length/sizeof(int);
+ *nrows = rows;
+ data = prop->value;
+ for (i = 0; i < rows; i++)
+ *row_legend_data++ = be32_to_cpup(data++);
+ }
+
+ prop = of_find_property(np, "qcom,lut-data", NULL);
+ if (!prop) {
+ pr_err("prop 'qcom,lut-data' not found\n");
+ return -EINVAL;
+ }
+ data = prop->value;
+ size = prop->length/sizeof(int);
+ if (size != cols * rows) {
+ pr_err("%s: data size mismatch, %dx%d != %d\n",
+ np->name, cols, rows, size);
+ return -EINVAL;
+ }
+ for (i = 0; i < rows; i++) {
+ out_values = lut_data + (max_cols * i);
+ for (j = 0; j < cols; j++) {
+ *out_values++ = be32_to_cpup(data++);
+ pr_debug("Value = %d\n", *(out_values-1));
+ }
+ }
+
+ return 0;
+}
+
+static int of_batterydata_read_sf_lut(struct device_node *data_node,
+ const char *name, struct sf_lut *lut)
+{
+ struct device_node *node = of_find_node_by_name(data_node, name);
+ int rc;
+
+ if (!lut) {
+ pr_debug("No lut provided, skipping\n");
+ return 0;
+ } else if (!node) {
+ pr_err("Couldn't find %s node.\n", name);
+ return -EINVAL;
+ }
+
+ rc = of_batterydata_read_lut(node, PC_CC_COLS, PC_CC_ROWS,
+ &lut->cols, &lut->rows, lut->row_entries,
+ lut->percent, *lut->sf);
+ if (rc) {
+ pr_err("Failed to read %s node.\n", name);
+ return rc;
+ }
+
+ return 0;
+}
+
+static int of_batterydata_read_pc_temp_ocv_lut(struct device_node *data_node,
+ const char *name, struct pc_temp_ocv_lut *lut)
+{
+ struct device_node *node = of_find_node_by_name(data_node, name);
+ int rc;
+
+ if (!lut) {
+ pr_debug("No lut provided, skipping\n");
+ return 0;
+ } else if (!node) {
+ pr_err("Couldn't find %s node.\n", name);
+ return -EINVAL;
+ }
+ rc = of_batterydata_read_lut(node, PC_TEMP_COLS, PC_TEMP_ROWS,
+ &lut->cols, &lut->rows, lut->temp, lut->percent,
+ *lut->ocv);
+ if (rc) {
+ pr_err("Failed to read %s node.\n", name);
+ return rc;
+ }
+
+ return 0;
+}
+
+static int of_batterydata_read_ibat_temp_acc_lut(struct device_node *data_node,
+ const char *name, struct ibat_temp_acc_lut *lut)
+{
+ struct device_node *node = of_find_node_by_name(data_node, name);
+ int rc;
+
+ if (!lut) {
+ pr_debug("No lut provided, skipping\n");
+ return 0;
+ } else if (!node) {
+ pr_debug("Couldn't find %s node.\n", name);
+ return 0;
+ }
+ rc = of_batterydata_read_lut(node, ACC_TEMP_COLS, ACC_IBAT_ROWS,
+ &lut->cols, &lut->rows, lut->temp, lut->ibat,
+ *lut->acc);
+ if (rc) {
+ pr_err("Failed to read %s node.\n", name);
+ return rc;
+ }
+
+ return 0;
+}
+
+static int of_batterydata_read_single_row_lut(struct device_node *data_node,
+ const char *name, struct single_row_lut *lut)
+{
+ struct device_node *node = of_find_node_by_name(data_node, name);
+ int rc;
+
+ if (!lut) {
+ pr_debug("No lut provided, skipping\n");
+ return 0;
+ } else if (!node) {
+ pr_err("Couldn't find %s node.\n", name);
+ return -EINVAL;
+ }
+
+ rc = of_batterydata_read_lut(node, MAX_SINGLE_LUT_COLS, 1,
+ &lut->cols, NULL, lut->x, NULL, lut->y);
+ if (rc) {
+ pr_err("Failed to read %s node.\n", name);
+ return rc;
+ }
+
+ return 0;
+}
+
+static int of_batterydata_read_batt_id_kohm(const struct device_node *np,
+ const char *propname, struct batt_ids *batt_ids)
+{
+ struct property *prop;
+ const __be32 *data;
+ int num, i, *id_kohm = batt_ids->kohm;
+
+ prop = of_find_property(np, "qcom,batt-id-kohm", NULL);
+ if (!prop) {
+ pr_err("%s: No battery id resistor found\n", np->name);
+ return -EINVAL;
+ } else if (!prop->value) {
+ pr_err("%s: No battery id resistor value found, np->name\n",
+ np->name);
+ return -ENODATA;
+ } else if (prop->length > MAX_BATT_ID_NUM * sizeof(__be32)) {
+ pr_err("%s: Too many battery id resistors\n", np->name);
+ return -EINVAL;
+ }
+
+ num = prop->length/sizeof(__be32);
+ batt_ids->num = num;
+ data = prop->value;
+ for (i = 0; i < num; i++)
+ *id_kohm++ = be32_to_cpup(data++);
+
+ return 0;
+}
+
+#define OF_PROP_READ(property, qpnp_dt_property, node, rc, optional) \
+do { \
+ if (rc) \
+ break; \
+ rc = of_property_read_u32(node, "qcom," qpnp_dt_property, \
+ &property); \
+ \
+ if ((rc == -EINVAL) && optional) { \
+ property = -EINVAL; \
+ rc = 0; \
+ } else if (rc) { \
+ pr_err("Error reading " #qpnp_dt_property \
+ " property rc = %d\n", rc); \
+ } \
+} while (0)
+
+static int of_batterydata_load_battery_data(struct device_node *node,
+ int best_id_kohm,
+ struct bms_battery_data *batt_data)
+{
+ int rc;
+
+ rc = of_batterydata_read_single_row_lut(node, "qcom,fcc-temp-lut",
+ batt_data->fcc_temp_lut);
+ if (rc)
+ return rc;
+
+ rc = of_batterydata_read_pc_temp_ocv_lut(node,
+ "qcom,pc-temp-ocv-lut",
+ batt_data->pc_temp_ocv_lut);
+ if (rc)
+ return rc;
+
+ rc = of_batterydata_read_sf_lut(node, "qcom,rbatt-sf-lut",
+ batt_data->rbatt_sf_lut);
+ if (rc)
+ return rc;
+
+ rc = of_batterydata_read_ibat_temp_acc_lut(node, "qcom,ibat-acc-lut",
+ batt_data->ibat_acc_lut);
+ if (rc)
+ return rc;
+
+ rc = of_property_read_string(node, "qcom,battery-type",
+ &batt_data->battery_type);
+ if (rc) {
+ pr_err("Error reading qcom,battery-type property rc=%d\n", rc);
+ batt_data->battery_type = NULL;
+ return rc;
+ }
+
+ OF_PROP_READ(batt_data->fcc, "fcc-mah", node, rc, false);
+ OF_PROP_READ(batt_data->default_rbatt_mohm,
+ "default-rbatt-mohm", node, rc, false);
+ OF_PROP_READ(batt_data->rbatt_capacitive_mohm,
+ "rbatt-capacitive-mohm", node, rc, false);
+ OF_PROP_READ(batt_data->flat_ocv_threshold_uv,
+ "flat-ocv-threshold-uv", node, rc, true);
+ OF_PROP_READ(batt_data->max_voltage_uv,
+ "max-voltage-uv", node, rc, true);
+ OF_PROP_READ(batt_data->cutoff_uv, "v-cutoff-uv", node, rc, true);
+ OF_PROP_READ(batt_data->iterm_ua, "chg-term-ua", node, rc, true);
+ OF_PROP_READ(batt_data->fastchg_current_ma,
+ "fastchg-current-ma", node, rc, true);
+ OF_PROP_READ(batt_data->fg_cc_cv_threshold_mv,
+ "fg-cc-cv-threshold-mv", node, rc, true);
+
+ batt_data->batt_id_kohm = best_id_kohm;
+
+ return rc;
+}
+
+static int64_t of_batterydata_convert_battery_id_kohm(int batt_id_uv,
+ int rpull_up, int vadc_vdd)
+{
+ int64_t resistor_value_kohm, denom;
+
+ if (batt_id_uv == 0) {
+ /* vadc not correct or batt id line grounded, report 0 kohms */
+ return 0;
+ }
+ /* calculate the battery id resistance reported via ADC */
+ denom = div64_s64(vadc_vdd * 1000000LL, batt_id_uv) - 1000000LL;
+
+ if (denom == 0) {
+ /* batt id connector might be open, return 0 kohms */
+ return 0;
+ }
+ resistor_value_kohm = div64_s64(rpull_up * 1000000LL + denom/2, denom);
+
+ pr_debug("batt id voltage = %d, resistor value = %lld\n",
+ batt_id_uv, resistor_value_kohm);
+
+ return resistor_value_kohm;
+}
+
+struct device_node *of_batterydata_get_best_profile(
+ const struct device_node *batterydata_container_node,
+ int batt_id_kohm, const char *batt_type)
+{
+ struct batt_ids batt_ids;
+ struct device_node *node, *best_node = NULL;
+ const char *battery_type = NULL;
+ int delta = 0, best_delta = 0, best_id_kohm = 0, id_range_pct,
+ i = 0, rc = 0, limit = 0;
+ bool in_range = false;
+
+ /* read battery id range percentage for best profile */
+ rc = of_property_read_u32(batterydata_container_node,
+ "qcom,batt-id-range-pct", &id_range_pct);
+
+ if (rc) {
+ if (rc == -EINVAL) {
+ id_range_pct = 0;
+ } else {
+ pr_err("failed to read battery id range\n");
+ return ERR_PTR(-ENXIO);
+ }
+ }
+
+ /*
+ * Find the battery data with a battery id resistor closest to this one
+ */
+ for_each_child_of_node(batterydata_container_node, node) {
+ if (batt_type != NULL) {
+ rc = of_property_read_string(node, "qcom,battery-type",
+ &battery_type);
+ if (!rc && strcmp(battery_type, batt_type) == 0) {
+ best_node = node;
+ best_id_kohm = batt_id_kohm;
+ break;
+ }
+ } else {
+ rc = of_batterydata_read_batt_id_kohm(node,
+ "qcom,batt-id-kohm",
+ &batt_ids);
+ if (rc)
+ continue;
+ for (i = 0; i < batt_ids.num; i++) {
+ delta = abs(batt_ids.kohm[i] - batt_id_kohm);
+ limit = (batt_ids.kohm[i] * id_range_pct) / 100;
+ in_range = (delta <= limit);
+ /*
+ * Check if the delta is the lowest one
+ * and also if the limits are in range
+ * before selecting the best node.
+ */
+ if ((delta < best_delta || !best_node)
+ && in_range) {
+ best_node = node;
+ best_delta = delta;
+ best_id_kohm = batt_ids.kohm[i];
+ }
+ }
+ }
+ }
+
+ if (best_node == NULL) {
+ pr_err("No battery data found\n");
+ return best_node;
+ }
+
+ /* check that profile id is in range of the measured batt_id */
+ if (abs(best_id_kohm - batt_id_kohm) >
+ ((best_id_kohm * id_range_pct) / 100)) {
+ pr_err("out of range: profile id %d batt id %d pct %d",
+ best_id_kohm, batt_id_kohm, id_range_pct);
+ return NULL;
+ }
+
+ rc = of_property_read_string(best_node, "qcom,battery-type",
+ &battery_type);
+ if (!rc)
+ pr_info("%s found\n", battery_type);
+ else
+ pr_info("%s found\n", best_node->name);
+
+ return best_node;
+}
+
+int of_batterydata_read_data(struct device_node *batterydata_container_node,
+ struct bms_battery_data *batt_data,
+ int batt_id_uv)
+{
+ struct device_node *node, *best_node;
+ struct batt_ids batt_ids;
+ const char *battery_type = NULL;
+ int delta, best_delta, batt_id_kohm, rpull_up_kohm,
+ vadc_vdd_uv, best_id_kohm, i, rc = 0;
+
+ node = batterydata_container_node;
+ OF_PROP_READ(rpull_up_kohm, "rpull-up-kohm", node, rc, false);
+ OF_PROP_READ(vadc_vdd_uv, "vref-batt-therm", node, rc, false);
+ if (rc)
+ return rc;
+
+ batt_id_kohm = of_batterydata_convert_battery_id_kohm(batt_id_uv,
+ rpull_up_kohm, vadc_vdd_uv);
+ best_node = NULL;
+ best_delta = 0;
+ best_id_kohm = 0;
+
+ /*
+ * Find the battery data with a battery id resistor closest to this one
+ */
+ for_each_child_of_node(batterydata_container_node, node) {
+ rc = of_batterydata_read_batt_id_kohm(node,
+ "qcom,batt-id-kohm",
+ &batt_ids);
+ if (rc)
+ continue;
+ for (i = 0; i < batt_ids.num; i++) {
+ delta = abs(batt_ids.kohm[i] - batt_id_kohm);
+ if (delta < best_delta || !best_node) {
+ best_node = node;
+ best_delta = delta;
+ best_id_kohm = batt_ids.kohm[i];
+ }
+ }
+ }
+
+ if (best_node == NULL) {
+ pr_err("No battery data found\n");
+ return -ENODATA;
+ }
+ rc = of_property_read_string(best_node, "qcom,battery-type",
+ &battery_type);
+ if (!rc)
+ pr_info("%s loaded\n", battery_type);
+ else
+ pr_info("%s loaded\n", best_node->name);
+
+ return of_batterydata_load_battery_data(best_node,
+ best_id_kohm, batt_data);
+}
+
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/batterydata-lib.h b/include/linux/batterydata-lib.h
new file mode 100644
index 0000000..39517f8
--- /dev/null
+++ b/include/linux/batterydata-lib.h
@@ -0,0 +1,218 @@
+/* Copyright (c) 2012-2015, 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.
+ */
+
+#ifndef __BMS_BATTERYDATA_H
+#define __BMS_BATTERYDATA_H
+
+#include <linux/errno.h>
+
+#define FCC_CC_COLS 5
+#define FCC_TEMP_COLS 8
+
+#define PC_CC_ROWS 31
+#define PC_CC_COLS 13
+
+#define PC_TEMP_ROWS 31
+#define PC_TEMP_COLS 8
+
+#define ACC_IBAT_ROWS 4
+#define ACC_TEMP_COLS 3
+
+#define MAX_SINGLE_LUT_COLS 20
+
+#define MAX_BATT_ID_NUM 4
+#define DEGC_SCALE 10
+
+struct single_row_lut {
+ int x[MAX_SINGLE_LUT_COLS];
+ int y[MAX_SINGLE_LUT_COLS];
+ int cols;
+};
+
+/**
+ * struct sf_lut -
+ * @rows: number of percent charge entries should be <= PC_CC_ROWS
+ * @cols: number of charge cycle entries should be <= PC_CC_COLS
+ * @row_entries: the charge cycles/temperature at which sf data
+ * is available in the table.
+ * The charge cycles must be in increasing order from 0 to rows.
+ * @percent: the percent charge at which sf data is available in the table
+ * The percentcharge must be in decreasing order from 0 to cols.
+ * @sf: the scaling factor data
+ */
+struct sf_lut {
+ int rows;
+ int cols;
+ int row_entries[PC_CC_COLS];
+ int percent[PC_CC_ROWS];
+ int sf[PC_CC_ROWS][PC_CC_COLS];
+};
+
+/**
+ * struct pc_temp_ocv_lut -
+ * @rows: number of percent charge entries should be <= PC_TEMP_ROWS
+ * @cols: number of temperature entries should be <= PC_TEMP_COLS
+ * @temp: the temperatures at which ocv data is available in the table
+ * The temperatures must be in increasing order from 0 to rows.
+ * @percent: the percent charge at which ocv data is available in the table
+ * The percentcharge must be in decreasing order from 0 to cols.
+ * @ocv: the open circuit voltage
+ */
+struct pc_temp_ocv_lut {
+ int rows;
+ int cols;
+ int temp[PC_TEMP_COLS];
+ int percent[PC_TEMP_ROWS];
+ int ocv[PC_TEMP_ROWS][PC_TEMP_COLS];
+};
+
+struct ibat_temp_acc_lut {
+ int rows;
+ int cols;
+ int temp[ACC_TEMP_COLS];
+ int ibat[ACC_IBAT_ROWS];
+ int acc[ACC_IBAT_ROWS][ACC_TEMP_COLS];
+};
+
+struct batt_ids {
+ int kohm[MAX_BATT_ID_NUM];
+ int num;
+};
+
+enum battery_type {
+ BATT_UNKNOWN = 0,
+ BATT_PALLADIUM,
+ BATT_DESAY,
+ BATT_OEM,
+ BATT_QRD_4V35_2000MAH,
+ BATT_QRD_4V2_1300MAH,
+};
+
+/**
+ * struct bms_battery_data -
+ * @fcc: full charge capacity (mAmpHour)
+ * @fcc_temp_lut: table to get fcc at a given temp
+ * @pc_temp_ocv_lut: table to get percent charge given batt temp and cycles
+ * @pc_sf_lut: table to get percent charge scaling factor given cycles
+ * and percent charge
+ * @rbatt_sf_lut: table to get battery resistance scaling factor given
+ * temperature and percent charge
+ * @default_rbatt_mohm: the default value of battery resistance to use when
+ * readings from bms are not available.
+ * @delta_rbatt_mohm: the resistance to be added towards lower soc to
+ * compensate for battery capacitance.
+ * @rbatt_capacitve_mohm: the resistance to be added to compensate for
+ * battery capacitance
+ * @flat_ocv_threshold_uv: the voltage where the battery's discharge curve
+ * starts flattening out.
+ * @max_voltage_uv: max voltage of the battery
+ * @cutoff_uv: cutoff voltage of the battery
+ * @iterm_ua: termination current of the battery when charging
+ * to 100%
+ * @batt_id_kohm: the best matched battery id resistor value
+ * @fastchg_current_ma: maximum fast charge current
+ * @fg_cc_cv_threshold_mv: CC to CV threashold voltage
+ */
+
+struct bms_battery_data {
+ unsigned int fcc;
+ struct single_row_lut *fcc_temp_lut;
+ struct single_row_lut *fcc_sf_lut;
+ struct pc_temp_ocv_lut *pc_temp_ocv_lut;
+ struct ibat_temp_acc_lut *ibat_acc_lut;
+ struct sf_lut *pc_sf_lut;
+ struct sf_lut *rbatt_sf_lut;
+ int default_rbatt_mohm;
+ int delta_rbatt_mohm;
+ int rbatt_capacitive_mohm;
+ int flat_ocv_threshold_uv;
+ int max_voltage_uv;
+ int cutoff_uv;
+ int iterm_ua;
+ int batt_id_kohm;
+ int fastchg_current_ma;
+ int fg_cc_cv_threshold_mv;
+ const char *battery_type;
+};
+
+#define is_between(left, right, value) \
+ (((left) >= (right) && (left) >= (value) \
+ && (value) >= (right)) \
+ || ((left) <= (right) && (left) <= (value) \
+ && (value) <= (right)))
+
+#if defined(CONFIG_PM8921_BMS) || \
+ defined(CONFIG_PM8921_BMS_MODULE) || \
+ defined(CONFIG_QPNP_BMS) || \
+ defined(CONFIG_QPNP_VM_BMS)
+extern struct bms_battery_data palladium_1500_data;
+extern struct bms_battery_data desay_5200_data;
+extern struct bms_battery_data oem_batt_data;
+extern struct bms_battery_data QRD_4v35_2000mAh_data;
+extern struct bms_battery_data qrd_4v2_1300mah_data;
+
+int interpolate_fcc(struct single_row_lut *fcc_temp_lut, int batt_temp);
+int interpolate_scalingfactor(struct sf_lut *sf_lut, int row_entry, int pc);
+int interpolate_scalingfactor_fcc(struct single_row_lut *fcc_sf_lut,
+ int cycles);
+int interpolate_pc(struct pc_temp_ocv_lut *pc_temp_ocv,
+ int batt_temp_degc, int ocv);
+int interpolate_ocv(struct pc_temp_ocv_lut *pc_temp_ocv,
+ int batt_temp_degc, int pc);
+int interpolate_slope(struct pc_temp_ocv_lut *pc_temp_ocv,
+ int batt_temp, int pc);
+int interpolate_acc(struct ibat_temp_acc_lut *ibat_acc_lut,
+ int batt_temp, int ibat);
+int linear_interpolate(int y0, int x0, int y1, int x1, int x);
+#else
+static inline int interpolate_fcc(struct single_row_lut *fcc_temp_lut,
+ int batt_temp)
+{
+ return -EINVAL;
+}
+static inline int interpolate_scalingfactor(struct sf_lut *sf_lut,
+ int row_entry, int pc)
+{
+ return -EINVAL;
+}
+static inline int interpolate_scalingfactor_fcc(
+ struct single_row_lut *fcc_sf_lut, int cycles)
+{
+ return -EINVAL;
+}
+static inline int interpolate_pc(struct pc_temp_ocv_lut *pc_temp_ocv,
+ int batt_temp_degc, int ocv)
+{
+ return -EINVAL;
+}
+static inline int interpolate_ocv(struct pc_temp_ocv_lut *pc_temp_ocv,
+ int batt_temp_degc, int pc)
+{
+ return -EINVAL;
+}
+static inline int interpolate_slope(struct pc_temp_ocv_lut *pc_temp_ocv,
+ int batt_temp, int pc)
+{
+ return -EINVAL;
+}
+static inline int linear_interpolate(int y0, int x0, int y1, int x1, int x)
+{
+ return -EINVAL;
+}
+static inline int interpolate_acc(struct ibat_temp_acc_lut *ibat_acc_lut,
+ int batt_temp, int ibat)
+{
+ return -EINVAL;
+}
+#endif
+
+#endif
diff --git a/include/linux/of_batterydata.h b/include/linux/of_batterydata.h
new file mode 100644
index 0000000..5505371
--- /dev/null
+++ b/include/linux/of_batterydata.h
@@ -0,0 +1,64 @@
+/* Copyright (c) 2013-2014, 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.
+ */
+
+#include <linux/of.h>
+#include <linux/batterydata-lib.h>
+
+#ifdef CONFIG_OF_BATTERYDATA
+/**
+ * of_batterydata_read_data() - Populate battery data from the device tree
+ * @container_node: pointer to the battery-data container device node
+ * containing the profile nodes.
+ * @batt_data: pointer to an allocated bms_battery_data structure that the
+ * loaded profile will be written to.
+ * @batt_id_uv: ADC voltage of the battery id line used to differentiate
+ * between different battery profiles. If there are multiple
+ * battery data in the device tree, the one with the closest
+ * battery id resistance will be automatically loaded.
+ *
+ * This routine loads the closest match battery data from device tree based on
+ * the battery id reading. Then, it will try to load all the relevant data from
+ * the device tree battery data profile.
+ *
+ * If any of the lookup table pointers are NULL, this routine will skip trying
+ * to read them.
+ */
+int of_batterydata_read_data(struct device_node *container_node,
+ struct bms_battery_data *batt_data,
+ int batt_id_uv);
+/**
+ * of_batterydata_get_best_profile() - Find matching battery data device node
+ * @batterydata_container_node: pointer to the battery-data container device
+ * node containing the profile nodes.
+ * @batt_id_kohm: Battery ID in KOhms for which we want to find the profile.
+ * @batt_type: Battery type which we want to force load the profile.
+ *
+ * This routine returns a device_node pointer to the closest match battery data
+ * from device tree based on the battery id reading.
+ */
+struct device_node *of_batterydata_get_best_profile(
+ struct device_node *batterydata_container_node,
+ int batt_id_kohm, const char *batt_type);
+#else
+static inline int of_batterydata_read_data(struct device_node *container_node,
+ struct bms_battery_data *batt_data,
+ int batt_id_uv)
+{
+ return -ENXIO;
+}
+static inline struct device_node *of_batterydata_get_best_profile(
+ struct device_node *batterydata_container_node,
+ int batt_id_kohm, const char *batt_type)
+{
+ return -ENXIO;
+}
+#endif /* CONFIG_OF_QPNP */