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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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power: supply: core: Cleanup power supply sysfs attribute list
Make the device attribute list used to create sysfs attributes more robust by decoupling the list order from order of the enum defined in power_supply.h. This is done by using a designated initializer in the POWER_SUPPLY_ATTR macro. Signed-off-by: Mathew King <mathewk@chromium.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
parent
72d9cd9cdc
commit
2cabeaf151
1 changed files with 132 additions and 128 deletions
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@ -18,27 +18,21 @@
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#include "power_supply.h"
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/*
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* This is because the name "current" breaks the device attr macro.
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* The "current" word resolves to "(get_current())" so instead of
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* "current" "(get_current())" appears in the sysfs.
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*
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* The source of this definition is the device.h which calls __ATTR
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* macro in sysfs.h which calls the __stringify macro.
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*
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* Only modification that the name is not tried to be resolved
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* (as a macro let's say).
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*/
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#define MAX_PROP_NAME_LEN 30
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#define POWER_SUPPLY_ATTR(_name) \
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{ \
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.attr = { .name = #_name }, \
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.show = power_supply_show_property, \
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.store = power_supply_store_property, \
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struct power_supply_attr {
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const char *prop_name;
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char attr_name[MAX_PROP_NAME_LEN + 1];
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struct device_attribute dev_attr;
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};
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#define POWER_SUPPLY_ATTR(_name) \
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[POWER_SUPPLY_PROP_ ## _name] = \
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{ \
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.prop_name = #_name, \
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.attr_name = #_name "\0", \
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}
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static struct device_attribute power_supply_attrs[];
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static const char * const power_supply_type_text[] = {
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"Unknown", "Battery", "UPS", "Mains", "USB",
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"USB_DCP", "USB_CDP", "USB_ACA", "USB_C",
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@ -77,6 +71,91 @@ static const char * const power_supply_scope_text[] = {
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"Unknown", "System", "Device"
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};
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static struct power_supply_attr power_supply_attrs[] = {
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/* Properties of type `int' */
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POWER_SUPPLY_ATTR(STATUS),
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POWER_SUPPLY_ATTR(CHARGE_TYPE),
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POWER_SUPPLY_ATTR(HEALTH),
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POWER_SUPPLY_ATTR(PRESENT),
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POWER_SUPPLY_ATTR(ONLINE),
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POWER_SUPPLY_ATTR(AUTHENTIC),
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POWER_SUPPLY_ATTR(TECHNOLOGY),
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POWER_SUPPLY_ATTR(CYCLE_COUNT),
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POWER_SUPPLY_ATTR(VOLTAGE_MAX),
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POWER_SUPPLY_ATTR(VOLTAGE_MIN),
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POWER_SUPPLY_ATTR(VOLTAGE_MAX_DESIGN),
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POWER_SUPPLY_ATTR(VOLTAGE_MIN_DESIGN),
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POWER_SUPPLY_ATTR(VOLTAGE_NOW),
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POWER_SUPPLY_ATTR(VOLTAGE_AVG),
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POWER_SUPPLY_ATTR(VOLTAGE_OCV),
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POWER_SUPPLY_ATTR(VOLTAGE_BOOT),
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POWER_SUPPLY_ATTR(CURRENT_MAX),
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POWER_SUPPLY_ATTR(CURRENT_NOW),
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POWER_SUPPLY_ATTR(CURRENT_AVG),
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POWER_SUPPLY_ATTR(CURRENT_BOOT),
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POWER_SUPPLY_ATTR(POWER_NOW),
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POWER_SUPPLY_ATTR(POWER_AVG),
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POWER_SUPPLY_ATTR(CHARGE_FULL_DESIGN),
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POWER_SUPPLY_ATTR(CHARGE_EMPTY_DESIGN),
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POWER_SUPPLY_ATTR(CHARGE_FULL),
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POWER_SUPPLY_ATTR(CHARGE_EMPTY),
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POWER_SUPPLY_ATTR(CHARGE_NOW),
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POWER_SUPPLY_ATTR(CHARGE_AVG),
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POWER_SUPPLY_ATTR(CHARGE_COUNTER),
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POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT),
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POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT_MAX),
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POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE),
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POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE_MAX),
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POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT),
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POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT_MAX),
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POWER_SUPPLY_ATTR(CHARGE_CONTROL_START_THRESHOLD),
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POWER_SUPPLY_ATTR(CHARGE_CONTROL_END_THRESHOLD),
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POWER_SUPPLY_ATTR(INPUT_CURRENT_LIMIT),
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POWER_SUPPLY_ATTR(INPUT_VOLTAGE_LIMIT),
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POWER_SUPPLY_ATTR(INPUT_POWER_LIMIT),
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POWER_SUPPLY_ATTR(ENERGY_FULL_DESIGN),
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POWER_SUPPLY_ATTR(ENERGY_EMPTY_DESIGN),
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POWER_SUPPLY_ATTR(ENERGY_FULL),
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POWER_SUPPLY_ATTR(ENERGY_EMPTY),
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POWER_SUPPLY_ATTR(ENERGY_NOW),
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POWER_SUPPLY_ATTR(ENERGY_AVG),
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POWER_SUPPLY_ATTR(CAPACITY),
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POWER_SUPPLY_ATTR(CAPACITY_ALERT_MIN),
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POWER_SUPPLY_ATTR(CAPACITY_ALERT_MAX),
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POWER_SUPPLY_ATTR(CAPACITY_LEVEL),
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POWER_SUPPLY_ATTR(TEMP),
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POWER_SUPPLY_ATTR(TEMP_MAX),
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POWER_SUPPLY_ATTR(TEMP_MIN),
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POWER_SUPPLY_ATTR(TEMP_ALERT_MIN),
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POWER_SUPPLY_ATTR(TEMP_ALERT_MAX),
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POWER_SUPPLY_ATTR(TEMP_AMBIENT),
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POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MIN),
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POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MAX),
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POWER_SUPPLY_ATTR(TIME_TO_EMPTY_NOW),
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POWER_SUPPLY_ATTR(TIME_TO_EMPTY_AVG),
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POWER_SUPPLY_ATTR(TIME_TO_FULL_NOW),
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POWER_SUPPLY_ATTR(TIME_TO_FULL_AVG),
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POWER_SUPPLY_ATTR(TYPE),
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POWER_SUPPLY_ATTR(USB_TYPE),
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POWER_SUPPLY_ATTR(SCOPE),
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POWER_SUPPLY_ATTR(PRECHARGE_CURRENT),
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POWER_SUPPLY_ATTR(CHARGE_TERM_CURRENT),
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POWER_SUPPLY_ATTR(CALIBRATE),
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/* Properties of type `const char *' */
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POWER_SUPPLY_ATTR(MODEL_NAME),
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POWER_SUPPLY_ATTR(MANUFACTURER),
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POWER_SUPPLY_ATTR(SERIAL_NUMBER),
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};
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static struct attribute *
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__power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1];
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static enum power_supply_property dev_attr_psp(struct device_attribute *attr)
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{
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return container_of(attr, struct power_supply_attr, dev_attr) -
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power_supply_attrs;
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}
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static ssize_t power_supply_show_usb_type(struct device *dev,
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const struct power_supply_desc *desc,
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union power_supply_propval *value,
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@ -116,7 +195,7 @@ static ssize_t power_supply_show_property(struct device *dev,
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char *buf) {
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ssize_t ret;
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struct power_supply *psy = dev_get_drvdata(dev);
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enum power_supply_property psp = attr - power_supply_attrs;
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enum power_supply_property psp = dev_attr_psp(attr);
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union power_supply_propval value;
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if (psp == POWER_SUPPLY_PROP_TYPE) {
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@ -184,7 +263,7 @@ static ssize_t power_supply_store_property(struct device *dev,
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const char *buf, size_t count) {
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ssize_t ret;
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struct power_supply *psy = dev_get_drvdata(dev);
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enum power_supply_property psp = attr - power_supply_attrs;
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enum power_supply_property psp = dev_attr_psp(attr);
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union power_supply_propval value;
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switch (psp) {
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@ -233,86 +312,6 @@ static ssize_t power_supply_store_property(struct device *dev,
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return count;
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}
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/* Must be in the same order as POWER_SUPPLY_PROP_* */
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static struct device_attribute power_supply_attrs[] = {
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/* Properties of type `int' */
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POWER_SUPPLY_ATTR(status),
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POWER_SUPPLY_ATTR(charge_type),
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POWER_SUPPLY_ATTR(health),
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POWER_SUPPLY_ATTR(present),
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POWER_SUPPLY_ATTR(online),
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POWER_SUPPLY_ATTR(authentic),
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POWER_SUPPLY_ATTR(technology),
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POWER_SUPPLY_ATTR(cycle_count),
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POWER_SUPPLY_ATTR(voltage_max),
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POWER_SUPPLY_ATTR(voltage_min),
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POWER_SUPPLY_ATTR(voltage_max_design),
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POWER_SUPPLY_ATTR(voltage_min_design),
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POWER_SUPPLY_ATTR(voltage_now),
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POWER_SUPPLY_ATTR(voltage_avg),
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POWER_SUPPLY_ATTR(voltage_ocv),
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POWER_SUPPLY_ATTR(voltage_boot),
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POWER_SUPPLY_ATTR(current_max),
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POWER_SUPPLY_ATTR(current_now),
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POWER_SUPPLY_ATTR(current_avg),
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POWER_SUPPLY_ATTR(current_boot),
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POWER_SUPPLY_ATTR(power_now),
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POWER_SUPPLY_ATTR(power_avg),
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POWER_SUPPLY_ATTR(charge_full_design),
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POWER_SUPPLY_ATTR(charge_empty_design),
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POWER_SUPPLY_ATTR(charge_full),
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POWER_SUPPLY_ATTR(charge_empty),
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POWER_SUPPLY_ATTR(charge_now),
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POWER_SUPPLY_ATTR(charge_avg),
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POWER_SUPPLY_ATTR(charge_counter),
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POWER_SUPPLY_ATTR(constant_charge_current),
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POWER_SUPPLY_ATTR(constant_charge_current_max),
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POWER_SUPPLY_ATTR(constant_charge_voltage),
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POWER_SUPPLY_ATTR(constant_charge_voltage_max),
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POWER_SUPPLY_ATTR(charge_control_limit),
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POWER_SUPPLY_ATTR(charge_control_limit_max),
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POWER_SUPPLY_ATTR(charge_control_start_threshold),
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POWER_SUPPLY_ATTR(charge_control_end_threshold),
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POWER_SUPPLY_ATTR(input_current_limit),
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POWER_SUPPLY_ATTR(input_voltage_limit),
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POWER_SUPPLY_ATTR(input_power_limit),
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POWER_SUPPLY_ATTR(energy_full_design),
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POWER_SUPPLY_ATTR(energy_empty_design),
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POWER_SUPPLY_ATTR(energy_full),
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POWER_SUPPLY_ATTR(energy_empty),
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POWER_SUPPLY_ATTR(energy_now),
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POWER_SUPPLY_ATTR(energy_avg),
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POWER_SUPPLY_ATTR(capacity),
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POWER_SUPPLY_ATTR(capacity_alert_min),
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POWER_SUPPLY_ATTR(capacity_alert_max),
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POWER_SUPPLY_ATTR(capacity_level),
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POWER_SUPPLY_ATTR(temp),
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POWER_SUPPLY_ATTR(temp_max),
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POWER_SUPPLY_ATTR(temp_min),
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POWER_SUPPLY_ATTR(temp_alert_min),
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POWER_SUPPLY_ATTR(temp_alert_max),
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POWER_SUPPLY_ATTR(temp_ambient),
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POWER_SUPPLY_ATTR(temp_ambient_alert_min),
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POWER_SUPPLY_ATTR(temp_ambient_alert_max),
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POWER_SUPPLY_ATTR(time_to_empty_now),
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POWER_SUPPLY_ATTR(time_to_empty_avg),
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POWER_SUPPLY_ATTR(time_to_full_now),
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POWER_SUPPLY_ATTR(time_to_full_avg),
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POWER_SUPPLY_ATTR(type),
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POWER_SUPPLY_ATTR(usb_type),
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POWER_SUPPLY_ATTR(scope),
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POWER_SUPPLY_ATTR(precharge_current),
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POWER_SUPPLY_ATTR(charge_term_current),
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POWER_SUPPLY_ATTR(calibrate),
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/* Properties of type `const char *' */
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POWER_SUPPLY_ATTR(model_name),
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POWER_SUPPLY_ATTR(manufacturer),
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POWER_SUPPLY_ATTR(serial_number),
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};
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static struct attribute *
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__power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1];
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static umode_t power_supply_attr_is_visible(struct kobject *kobj,
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struct attribute *attr,
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int attrno)
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umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
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int i;
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if (!power_supply_attrs[attrno].prop_name)
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return 0;
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if (attrno == POWER_SUPPLY_PROP_TYPE)
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return mode;
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NULL,
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};
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static void str_to_lower(char *str)
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{
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while (*str) {
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*str = tolower(*str);
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str++;
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}
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}
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void power_supply_init_attrs(struct device_type *dev_type)
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{
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int i;
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dev_type->groups = power_supply_attr_groups;
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for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++)
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__power_supply_attrs[i] = &power_supply_attrs[i].attr;
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}
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for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++) {
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struct device_attribute *attr;
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static char *kstruprdup(const char *str, gfp_t gfp)
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{
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char *ret, *ustr;
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if (!power_supply_attrs[i].prop_name) {
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pr_warn("%s: Property %d skipped because is is missing from power_supply_attrs\n",
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__func__, i);
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sprintf(power_supply_attrs[i].attr_name, "_err_%d", i);
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} else {
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str_to_lower(power_supply_attrs[i].attr_name);
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}
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ustr = ret = kmalloc(strlen(str) + 1, gfp);
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attr = &power_supply_attrs[i].dev_attr;
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if (!ret)
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return NULL;
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while (*str)
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*ustr++ = toupper(*str++);
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*ustr = 0;
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return ret;
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attr->attr.name = power_supply_attrs[i].attr_name;
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attr->show = power_supply_show_property;
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attr->store = power_supply_store_property;
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__power_supply_attrs[i] = &attr->attr;
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}
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}
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int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
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struct power_supply *psy = dev_get_drvdata(dev);
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int ret = 0, j;
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char *prop_buf;
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char *attrname;
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if (!psy || !psy->desc) {
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dev_dbg(dev, "No power supply yet\n");
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return -ENOMEM;
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for (j = 0; j < psy->desc->num_properties; j++) {
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struct device_attribute *attr;
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struct power_supply_attr *pwr_attr;
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struct device_attribute *dev_attr;
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char *line;
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attr = &power_supply_attrs[psy->desc->properties[j]];
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pwr_attr = &power_supply_attrs[psy->desc->properties[j]];
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dev_attr = &pwr_attr->dev_attr;
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ret = power_supply_show_property(dev, attr, prop_buf);
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ret = power_supply_show_property(dev, dev_attr, prop_buf);
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if (ret == -ENODEV || ret == -ENODATA) {
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/* When a battery is absent, we expect -ENODEV. Don't abort;
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send the uevent with at least the the PRESENT=0 property */
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if (line)
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*line = 0;
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attrname = kstruprdup(attr->attr.name, GFP_KERNEL);
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if (!attrname) {
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ret = -ENOMEM;
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goto out;
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}
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ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf);
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kfree(attrname);
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ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s",
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pwr_attr->prop_name, prop_buf);
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if (ret)
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goto out;
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}
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