of: batterydata: Introduce DT support for battery data
Add the of_batterydata driver to parse device tree battery data.
Battery data contains battery profile information and is used by the
charger and the BMS drivers.
Change-Id: Ibe03800be0d51e82194c9385c6348c5a6c92711d
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>
diff --git a/include/linux/batterydata-lib.h b/include/linux/batterydata-lib.h
new file mode 100644
index 0000000..fe2d86f
--- /dev/null
+++ b/include/linux/batterydata-lib.h
@@ -0,0 +1,177 @@
+/* Copyright (c) 2012-2013, 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 MAX_SINGLE_LUT_COLS 20
+
+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];
+};
+
+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: battery id resistor value
+ */
+
+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 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;
+};
+
+#if defined(CONFIG_PM8921_BMS) || \
+ defined(CONFIG_PM8921_BMS_MODULE) || \
+ defined(CONFIG_QPNP_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 linear_interpolate(int y0, int x0, int y1, int x1, int x);
+int is_between(int left, int right, int value);
+#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 linear_interpolate(int y0, int x0, int y1, int x1, int x)
+{
+ return -EINVAL;
+}
+static inline int is_between(int left, int right, int value)
+{
+ return -EINVAL;
+}
+#endif
+
+#endif