--- /dev/null
+++ kernel-power/drivers/power/bq2415x_charger.c
-@@ -0,0 +1,1579 @@
+@@ -0,0 +1,1637 @@
+/*
+ bq2415x_charger.c - bq2415x charger driver
+ Copyright (C) 2011-2012 Pali Rohár <pali.rohar@gmail.com>
+
+#include <linux/power/bq2415x_charger.h>
+
-+#define BQ2415X_TIMER_TIMEOUT 10
++/* timeout for resetting chip timer */
++#define BQ2415X_TIMER_TIMEOUT 10
+
+#define BQ2415X_REG_STATUS 0x00
+#define BQ2415X_REG_CONTROL 0x01
+ int id;
+};
+
++/* each registered chip must have unique id */
+static DEFINE_IDR(bq2415x_id);
+
+static DEFINE_MUTEX(bq2415x_id_mutex);
+static DEFINE_MUTEX(bq2415x_timer_mutex);
+static DEFINE_MUTEX(bq2415x_i2c_mutex);
+
-+/* i2c read functions */
++/**** i2c read functions ****/
+
++/* read value from register */
+static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
+{
+ struct i2c_client *client = to_i2c_client(bq->dev);
+ return val;
+}
+
++/* read value from register, apply mask and right shift it */
+static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
+ u8 mask, u8 shift)
+{
+ return (ret & mask) >> shift;
+}
+
++/* read value from register and return one specified bit */
+static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
+{
+ if (bit > 8)
+ return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
+}
+
-+/* i2c write functions */
++/**** i2c write functions ****/
+
++/* write value to register */
+static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
+{
+ struct i2c_client *client = to_i2c_client(bq->dev);
+ return 0;
+}
+
++/* read value from register, change it with mask left shifted and write back */
+static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
+ u8 mask, u8 shift)
+{
+ return bq2415x_i2c_write(bq, reg, ret);
+}
+
++/* change only one bit in register */
+static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
+ bool val, u8 bit)
+{
+ return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
+}
+
-+/* global exec command function */
++/**** global functions ****/
+
++/* exec command function */
+static int bq2415x_exec_command(struct bq2415x_device *bq,
+ enum bq2415x_command command)
+{
+ }
+}
+
-+/* global detect chip */
-+
++/* detect chip type */
+static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
+{
+ struct i2c_client *client = to_i2c_client(bq->dev);
+ return BQUNKNOWN;
+}
+
++/* detect chip revision */
+static int bq2415x_detect_revision(struct bq2415x_device *bq)
+{
+ int ret = bq2415x_exec_command(bq, BQ2415X_REVISION);
+ return -1;
+}
+
++/* return chip vender code */
+static int bq2415x_get_vender_code(struct bq2415x_device *bq)
+{
+ int ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
+ ((ret >> 2) & 0x1) * 100;
+}
+
-+/* global other functions */
-+
++/* reset all chip registers to default state */
+static void bq2415x_reset_chip(struct bq2415x_device *bq)
+{
+ bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT);
+ bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS);
+}
+
++/**** properties functions ****/
++
++/* set current limit in mA */
+static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
+{
+ int val;
+ BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
+}
+
++/* get current limit in mA */
+static int bq2415x_get_current_limit(struct bq2415x_device *bq)
+{
+ int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
+ return -EINVAL;
+}
+
++/* set weak battery voltage in mV */
+static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
+{
+ /* round to 100mV */
+ BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
+}
+
++/* get weak battery voltage in mV */
+static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
+{
+ int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
+ return 100 * (34 + ret);
+}
+
++/* set battery regulation voltage in mV */
+static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
+ int mV)
+{
+ BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
+}
+
++/* get battery regulation voltage in mV */
+static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq)
+{
+ int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE,
+ return 10 * (350 + 2*ret);
+}
+
++/* set charge current in mA (platform data must provide resistor sense) */
+static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
+{
+ int val;
+ BQ2415X_SHIFT_VI_CHRG);
+}
+
++/* get charge current in mA (platform data must provide resistor sense) */
+static int bq2415x_get_charge_current(struct bq2415x_device *bq)
+{
+ int ret;
+ return (37400 + 6800*ret) / bq->init_data.resistor_sense;
+}
+
++/* set termination current in mA (platform data must provide resistor sense) */
+static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
+{
+ int val;
+ BQ2415X_SHIFT_VI_TERM);
+}
+
++/* get termination current in mA (platform data must provide resistor sense) */
+static int bq2415x_get_termination_current(struct bq2415x_device *bq)
+{
+ int ret;
+ return (3400 + 3400*ret) / bq->init_data.resistor_sense;
+}
+
-+#define bq2415x_set_default_value(bq, value) \
++/* set default value of property */
++#define bq2415x_set_default_value(bq, prop) \
+ do { \
+ int ret = 0; \
-+ if (bq->init_data.value != -1) \
-+ ret = bq2415x_set_##value(bq, bq->init_data.value); \
++ if (bq->init_data.prop != -1) \
++ ret = bq2415x_set_##prop(bq, bq->init_data.prop); \
+ if (ret < 0) \
+ return ret; \
+ } while (0)
+
++/* set default values of all properties */
+static int bq2415x_set_defaults(struct bq2415x_device *bq)
+{
+ bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
+ bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
++ bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_DISABLE);
+ bq2415x_set_default_value(bq, current_limit);
+ bq2415x_set_default_value(bq, weak_battery_voltage);
+ bq2415x_set_default_value(bq, battery_regulation_voltage);
+ return 0;
+}
+
-+/* charger mode functions */
++/**** charger mode functions ****/
+
++/* set charger mode */
+static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
+{
+ int ret = 0;
+
+}
+
++/* hook function called by other driver which set reported mode */
+static void bq2415x_hook_function(enum bq2415x_mode mode, void *data)
+{
+ struct bq2415x_device *bq = data;
+ if (!bq)
+ return;
+
++ /* this should not happen, hook function is called only in automode */
++ if (bq->automode < 1)
++ return;
++
+ dev_dbg(bq->dev, "hook function was called\n");
+
+ bq->reported_mode = mode;
+ sysfs_notify(&bq->charger.dev->kobj, NULL, "reported_mode");
+
-+ if (bq->automode < 1)
-+ return;
-+
+ bq2415x_set_mode(bq, bq->reported_mode);
+
+}
+
-+/* timer functions */
++/**** timer functions ****/
+
++/* enable/disable auto resetting chip timer */
+static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state)
+{
+ mutex_lock(&bq2415x_timer_mutex);
+ mutex_unlock(&bq2415x_timer_mutex);
+}
+
++/* called by bq2415x_timer_work on timer error */
+static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
+{
+ dev_err(bq->dev, "%s\n", msg);
+ bq2415x_set_autotimer(bq, 0);
+}
+
++/* delayed work function for auto resetting chip timer */
+static void bq2415x_timer_work(struct work_struct *work)
+{
+ struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
+
+ ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
+ if (ret < 0) {
-+ bq2415x_timer_error(bq, "Reseting timer failed");
++ bq2415x_timer_error(bq, "Resetting timer failed");
+ return;
+ }
+
+
+ if (boost) {
+ switch (error) {
++ /* Non fatal errors, chip is OK */
+ case 0: /* No error */
+ break;
+ case 6: /* Timer expired */
+ dev_err(bq->dev, "Battery voltage to low\n");
+ break;
+
++ /* Fatal errors, disable and reset chip */
+ case 1: /* Overvoltage protection (chip fried) */
+ bq2415x_timer_error(bq,
-+ "Overvolatge protection (chip fried)");
++ "Overvoltage protection (chip fried)");
+ return;
+ case 2: /* Overload */
+ bq2415x_timer_error(bq, "Overload");
+ }
+ } else {
+ switch (error) {
++ /* Non fatal errors, chip is OK */
+ case 0: /* No error */
+ break;
+ case 2: /* Sleep mode */
+ dev_err(bq->dev, "No battery\n");
+ break;
+
++ /* Fatal errors, disable and reset chip */
+ case 1: /* Overvoltage protection (chip fried) */
+ bq2415x_timer_error(bq,
-+ "Overvolatge protection (chip fried)");
++ "Overvoltage protection (chip fried)");
+ return;
+ case 4: /* Battery overvoltage protection */
+ bq2415x_timer_error(bq,
+ schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
+}
+
-+/* power supply */
++/**** power supply interface code ****/
+
+static enum power_supply_property bq2415x_power_supply_props[] = {
-+ /* TODO: more power supply properties */
++ /* TODO: maybe add more power supply properties */
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+};
+ kfree(bq->model);
+}
+
-+/* sysfs files */
++/**** additional sysfs entries for power supply interface ****/
+
++/* show *_status entries */
+static ssize_t bq2415x_sysfs_show_status(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", ret);
+}
+
++/* set timer entry:
++ auto - enable auto mode
++ off - disable auto mode
++ (other values) - reset chip timer
++*/
+static ssize_t bq2415x_sysfs_set_timer(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ return count;
+}
+
++/* show timer entry (auto or off) */
+static ssize_t bq2415x_sysfs_show_timer(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "off\n");
+}
+
++/* set mode entry:
++ auto - if automode is supported, enable it and set mode to reported
++ none - disable charger and boost mode
++ host - charging mode for host/hub chargers (current limit 500mA)
++ dedicated - charging mode for dedicated chargers (unlimited current limit)
++ boost - disable charger and enable boost mode
++*/
+static ssize_t bq2415x_sysfs_set_mode(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ } else if (strncmp(buf, "reset", 5) == 0) {
+ bq2415x_reset_chip(bq);
+ bq2415x_set_defaults(bq);
-+ if (bq->automode > 0)
-+ bq->automode = 1;
-+ return count;
++ if (bq->automode <= 0)
++ return count;
++ bq->automode = 1;
++ mode = bq->reported_mode;
+ } else
+ return -EINVAL;
+
+ return count;
+}
+
++/* show mode entry (auto, none, host, dedicated or boost) */
+static ssize_t bq2415x_sysfs_show_mode(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return ret;
+}
+
++/* show reported_mode entry (none, host, dedicated or boost) */
+static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
+ charger);
+
++ if (bq->automode < 0)
++ return -EINVAL;
++
+ switch (bq->reported_mode) {
+ case BQ2415X_MODE_NONE:
+ return sprintf(buf, "none\n");
+ return -EINVAL;
+}
+
++/* directly set raw value to chip register, format: 'register value' */
+static ssize_t bq2415x_sysfs_set_registers(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ return count;
+}
+
++/* print value of chip register, format: 'register=value' */
+static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq,
+ u8 reg, char *buf)
+{
+ return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
+}
+
++/* show all raw values of chip register, format per line: 'register=value' */
+static ssize_t bq2415x_sysfs_show_registers(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return ret;
+}
+
-+/* Current & Volatage settings */
-+
++/* set current and voltage limit entries (in mA or mV) */
+static ssize_t bq2415x_sysfs_set_limit(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ return count;
+}
+
++/* show current and voltage limit entries (in mA or mV) */
+static ssize_t bq2415x_sysfs_show_limit(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", ret);
+}
+
++/* set *_enable entries */
+static ssize_t bq2415x_sysfs_set_enable(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ return count;
+}
+
++/* show *_enable entries */
+static ssize_t bq2415x_sysfs_show_enable(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ sysfs_remove_group(&bq->charger.dev->kobj, &bq2415x_sysfs_attr_group);
+}
+
-+/* bq2415x register */
-+
++/* main bq2415x probe function */
+static int bq2415x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
+ bq2415x_set_autotimer(bq, 1);
+
-+ dev_info(bq->dev, "driver registred\n");
++ dev_info(bq->dev, "driver registered\n");
+ return 0;
+
+error_5:
+ return ret;
+}
+
-+/* bq2415x unregister */
++/* main bq2415x remove function */
+
+static int bq2415x_remove(struct i2c_client *client)
+{
+ idr_remove(&bq2415x_id, bq->id);
+ mutex_unlock(&bq2415x_id_mutex);
+
-+ dev_info(bq->dev, "driver unregistred\n");
++ dev_info(bq->dev, "driver unregistered\n");
+
+ kfree(bq->name);
+ kfree(bq);
+ platform_data->set_mode_hook(bq2415x_hook_function, bq2415x_device);
+
+ Board/platform function set_mode_hook return non zero value when hook
-+ function was successfull registred. Platform code should call that hook
++ function was successful registered. Platform code should call that hook
+ function (which get from pointer, with data) every time when charger was
+ connected/disconnected or require to enable boost mode. bq2415x driver then
+ will set correct current limit, enable/disable charger or boost mode.
+
+ (hook function and driver private data are NULL)
+
-+ After thet board/platform code must not call driver hook function! It is
++ After that board/platform code must not call driver hook function! It is
+ possible that pointer to hook function will not be valid and calling will
+ cause undefined result.
+
projects / kernel-power / commitdiff