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Message-Id: <20240608-power-supply-extensions-v2-2-2dcd35b012ad@weissschuh.net>
Date: Sat, 08 Jun 2024 21:19:38 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Sebastian Reichel <sre@...nel.org>, Armin Wolf <W_Armin@....de>
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH RFC v2 2/5] power: supply: core: avoid iterating properties
directly
With the introduction of power supply extension, it will not be enough
to iterate the properties on the struct power_supply directly.
Instead introduce a helper power_supply_has_property() which ill handle
properties added by extensions.
Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
drivers/power/supply/power_supply.h | 3 ++
drivers/power/supply/power_supply_core.c | 10 +++----
drivers/power/supply/power_supply_hwmon.c | 48 +++++++++++++++----------------
drivers/power/supply/power_supply_sysfs.c | 14 +++------
4 files changed, 36 insertions(+), 39 deletions(-)
diff --git a/drivers/power/supply/power_supply.h b/drivers/power/supply/power_supply.h
index 3cbafc58bdad..622be1f0a180 100644
--- a/drivers/power/supply/power_supply.h
+++ b/drivers/power/supply/power_supply.h
@@ -13,6 +13,9 @@ struct device;
struct device_type;
struct power_supply;
+extern bool power_supply_has_property(const struct power_supply_desc *psy_desc,
+ enum power_supply_property psp);
+
#ifdef CONFIG_SYSFS
extern void power_supply_init_attrs(void);
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index fefe938c9342..d57ecdd966e0 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -1183,8 +1183,8 @@ bool power_supply_battery_bti_in_range(struct power_supply_battery_info *info,
}
EXPORT_SYMBOL_GPL(power_supply_battery_bti_in_range);
-static bool psy_has_property(const struct power_supply_desc *psy_desc,
- enum power_supply_property psp)
+bool power_supply_has_property(const struct power_supply_desc *psy_desc,
+ enum power_supply_property psp)
{
bool found = false;
int i;
@@ -1209,7 +1209,7 @@ int power_supply_get_property(struct power_supply *psy,
return -ENODEV;
}
- if (psy_has_property(psy->desc, psp))
+ if (power_supply_has_property(psy->desc, psp))
return psy->desc->get_property(psy, psp, val);
else if (power_supply_battery_info_has_prop(psy->battery_info, psp))
return power_supply_battery_info_get_prop(psy->battery_info, psp, val);
@@ -1308,7 +1308,7 @@ static int psy_register_thermal(struct power_supply *psy)
return 0;
/* Register battery zone device psy reports temperature */
- if (psy_has_property(psy->desc, POWER_SUPPLY_PROP_TEMP)) {
+ if (power_supply_has_property(psy->desc, POWER_SUPPLY_PROP_TEMP)) {
/* Prefer our hwmon device and avoid duplicates */
struct thermal_zone_params tzp = {
.no_hwmon = IS_ENABLED(CONFIG_POWER_SUPPLY_HWMON)
@@ -1361,7 +1361,7 @@ __power_supply_register(struct device *parent,
pr_warn("%s: Expected proper parent device for '%s'\n",
__func__, desc->name);
- if (psy_has_property(desc, POWER_SUPPLY_PROP_USB_TYPE) &&
+ if (power_supply_has_property(desc, POWER_SUPPLY_PROP_USB_TYPE) &&
(!desc->usb_types || !desc->num_usb_types))
return ERR_PTR(-EINVAL);
diff --git a/drivers/power/supply/power_supply_hwmon.c b/drivers/power/supply/power_supply_hwmon.c
index c97893d4c25e..2ecbe4a74c25 100644
--- a/drivers/power/supply/power_supply_hwmon.c
+++ b/drivers/power/supply/power_supply_hwmon.c
@@ -8,6 +8,8 @@
#include <linux/power_supply.h>
#include <linux/slab.h>
+#include "power_supply.h"
+
struct power_supply_hwmon {
struct power_supply *psy;
unsigned long *props;
@@ -324,9 +326,26 @@ static const struct hwmon_chip_info power_supply_hwmon_chip_info = {
.info = power_supply_hwmon_info,
};
+static const enum power_supply_property power_supply_hwmon_props[] = {
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TEMP_MAX,
+ POWER_SUPPLY_PROP_TEMP_MIN,
+ POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
+ POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
+ POWER_SUPPLY_PROP_TEMP_AMBIENT,
+ POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN,
+ POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
int power_supply_add_hwmon_sysfs(struct power_supply *psy)
{
- const struct power_supply_desc *desc = psy->desc;
struct power_supply_hwmon *psyhw;
struct device *dev = &psy->dev;
struct device *hwmon;
@@ -352,30 +371,11 @@ int power_supply_add_hwmon_sysfs(struct power_supply *psy)
goto error;
}
- for (i = 0; i < desc->num_properties; i++) {
- const enum power_supply_property prop = desc->properties[i];
-
- switch (prop) {
- case POWER_SUPPLY_PROP_CURRENT_AVG:
- case POWER_SUPPLY_PROP_CURRENT_MAX:
- case POWER_SUPPLY_PROP_CURRENT_NOW:
- case POWER_SUPPLY_PROP_TEMP:
- case POWER_SUPPLY_PROP_TEMP_MAX:
- case POWER_SUPPLY_PROP_TEMP_MIN:
- case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
- case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
- case POWER_SUPPLY_PROP_TEMP_AMBIENT:
- case POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MIN:
- case POWER_SUPPLY_PROP_TEMP_AMBIENT_ALERT_MAX:
- case POWER_SUPPLY_PROP_VOLTAGE_AVG:
- case POWER_SUPPLY_PROP_VOLTAGE_MIN:
- case POWER_SUPPLY_PROP_VOLTAGE_MAX:
- case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ for (i = 0; i < ARRAY_SIZE(power_supply_hwmon_props); i++) {
+ const enum power_supply_property prop = power_supply_hwmon_props[i];
+
+ if (power_supply_has_property(psy->desc, prop))
set_bit(prop, psyhw->props);
- break;
- default:
- break;
- }
}
name = psy->desc->name;
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index 3e63d165b2f7..abd44ebfe6fe 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -367,7 +367,6 @@ static umode_t power_supply_attr_is_visible(struct kobject *kobj,
struct device *dev = kobj_to_dev(kobj);
struct power_supply *psy = dev_get_drvdata(dev);
umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
- int i;
if (!power_supply_attrs[attrno].prop_name)
return 0;
@@ -375,15 +374,10 @@ static umode_t power_supply_attr_is_visible(struct kobject *kobj,
if (attrno == POWER_SUPPLY_PROP_TYPE)
return mode;
- for (i = 0; i < psy->desc->num_properties; i++) {
- int property = psy->desc->properties[i];
-
- if (property == attrno) {
- if (power_supply_property_is_writeable(psy, property) > 0)
- mode |= S_IWUSR;
-
- return mode;
- }
+ if (power_supply_has_property(psy->desc, attrno)) {
+ if (power_supply_property_is_writeable(psy, attrno) > 0)
+ mode |= S_IWUSR;
+ return mode;
}
if (power_supply_battery_info_has_prop(psy->battery_info, attrno))
--
2.45.2
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