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/mfd/pm8xxx/batterydata-lib.h b/include/linux/batterydata-lib.h
similarity index 93%
rename from include/linux/mfd/pm8xxx/batterydata-lib.h
rename to include/linux/batterydata-lib.h
index 644eede..fe2d86f 100644
--- a/include/linux/mfd/pm8xxx/batterydata-lib.h
+++ b/include/linux/batterydata-lib.h
@@ -10,8 +10,8 @@
* GNU General Public License for more details.
*/
-#ifndef __PM8XXX_BMS_BATTERYDATA_H
-#define __PM8XXX_BMS_BATTERYDATA_H
+#ifndef __BMS_BATTERYDATA_H
+#define __BMS_BATTERYDATA_H
#include <linux/errno.h>
@@ -95,6 +95,11 @@
* 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 {
@@ -108,6 +113,10 @@
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) || \
diff --git a/include/linux/mfd/pm8xxx/pm8921-bms.h b/include/linux/mfd/pm8xxx/pm8921-bms.h
index cd70726..85dec85 100644
--- a/include/linux/mfd/pm8xxx/pm8921-bms.h
+++ b/include/linux/mfd/pm8xxx/pm8921-bms.h
@@ -14,7 +14,7 @@
#define __PM8XXX_BMS_H
#include <linux/errno.h>
-#include <linux/mfd/pm8xxx/batterydata-lib.h>
+#include <linux/batterydata-lib.h>
#define PM8921_BMS_DEV_NAME "pm8921-bms"
diff --git a/include/linux/of_batterydata.h b/include/linux/of_batterydata.h
new file mode 100644
index 0000000..b2ed5a1
--- /dev/null
+++ b/include/linux/of_batterydata.h
@@ -0,0 +1,45 @@
+/* Copyright (c) 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.
+ */
+
+#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);
+#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;
+}
+#endif /* CONFIG_OF_QPNP */