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Message-Id: <20240904-power-supply-extensions-v3-8-62efeb93f8ec@weissschuh.net>
Date: Wed, 04 Sep 2024 21:25:41 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Sebastian Reichel <sre@...nel.org>, Armin Wolf <W_Armin@....de>,
Hans de Goede <hdegoede@...hat.com>
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH RFC v3 8/9] power: supply: test-power: implement a power
supply extension
Allow easy testing of the new power supply extension functionality.
Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
drivers/power/supply/test_power.c | 104 ++++++++++++++++++++++++++++++++++++++
1 file changed, 104 insertions(+)
diff --git a/drivers/power/supply/test_power.c b/drivers/power/supply/test_power.c
index 442ceb7795e1..da1877f31929 100644
--- a/drivers/power/supply/test_power.c
+++ b/drivers/power/supply/test_power.c
@@ -37,6 +37,7 @@ static int battery_charge_counter = -1000;
static int battery_current = -1600;
static enum power_supply_charge_behaviour battery_charge_behaviour =
POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO;
+static bool battery_hook;
static bool module_initialized;
@@ -238,6 +239,82 @@ static const struct power_supply_config test_power_configs[] = {
},
};
+static int power_supply_ext_manufacture_year = 1234;
+static const enum power_supply_property power_supply_ext_props[] = {
+ POWER_SUPPLY_PROP_MANUFACTURE_YEAR,
+};
+
+static int power_supply_ext_get_property(struct power_supply *psy,
+ const struct power_supply_ext *ext,
+ void *ext_data,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_MANUFACTURE_YEAR:
+ val->intval = power_supply_ext_manufacture_year;
+ break;
+ default:
+ pr_info("%s: some properties deliberately report errors.\n",
+ __func__);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int power_supply_ext_set_property(struct power_supply *psy,
+ const struct power_supply_ext *ext,
+ void *ext_data,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_MANUFACTURE_YEAR:
+ power_supply_ext_manufacture_year = val->intval;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int power_supply_ext_property_is_writeable(struct power_supply *psy,
+ const struct power_supply_ext *ext,
+ void *ext_data,
+ enum power_supply_property psp)
+{
+ return true;
+}
+
+static const struct power_supply_ext power_supply_ext = {
+ .properties = power_supply_ext_props,
+ .num_properties = ARRAY_SIZE(power_supply_ext_props),
+ .get_property = power_supply_ext_get_property,
+ .set_property = power_supply_ext_set_property,
+ .property_is_writeable = power_supply_ext_property_is_writeable,
+};
+
+static void test_battery_configure_battery_hook(bool enable)
+{
+ struct power_supply *psy;
+
+ if (battery_hook == enable)
+ return;
+
+ psy = test_power_supplies[TEST_BATTERY];
+
+ if (enable) {
+ if (power_supply_register_extension(psy, &power_supply_ext, NULL)) {
+ pr_err("registering battery extension failed\n");
+ return;
+ }
+ } else {
+ power_supply_unregister_extension(psy, &power_supply_ext);
+ }
+
+ battery_hook = enable;
+}
+
static int __init test_power_init(void)
{
int i;
@@ -258,6 +335,8 @@ static int __init test_power_init(void)
}
}
+ test_battery_configure_battery_hook(true);
+
module_initialized = true;
return 0;
failed:
@@ -524,6 +603,22 @@ static int param_set_battery_current(const char *key,
#define param_get_battery_current param_get_int
+static int param_set_battery_hook(const char *key,
+ const struct kernel_param *kp)
+{
+ int tmp;
+
+ if (1 != sscanf(key, "%d", &tmp))
+ return -EINVAL;
+ if (tmp != 1 && tmp != 0)
+ return -EINVAL;
+
+ test_battery_configure_battery_hook(tmp);
+ return 0;
+}
+
+#define param_get_battery_hook param_get_int
+
static const struct kernel_param_ops param_ops_ac_online = {
.set = param_set_ac_online,
.get = param_get_ac_online,
@@ -574,6 +669,11 @@ static const struct kernel_param_ops param_ops_battery_current = {
.get = param_get_battery_current,
};
+static const struct kernel_param_ops param_ops_battery_hook = {
+ .set = param_set_battery_hook,
+ .get = param_get_battery_hook,
+};
+
#define param_check_ac_online(name, p) __param_check(name, p, void);
#define param_check_usb_online(name, p) __param_check(name, p, void);
#define param_check_battery_status(name, p) __param_check(name, p, void);
@@ -584,6 +684,7 @@ static const struct kernel_param_ops param_ops_battery_current = {
#define param_check_battery_voltage(name, p) __param_check(name, p, void);
#define param_check_battery_charge_counter(name, p) __param_check(name, p, void);
#define param_check_battery_current(name, p) __param_check(name, p, void);
+#define param_check_battery_hook(name, p) __param_check(name, p, void);
module_param(ac_online, ac_online, 0644);
@@ -621,6 +722,9 @@ MODULE_PARM_DESC(battery_charge_counter,
module_param(battery_current, battery_current, 0644);
MODULE_PARM_DESC(battery_current, "battery current (milliampere)");
+module_param(battery_hook, battery_hook, 0644);
+MODULE_PARM_DESC(battery_hook, "battery hook");
+
MODULE_DESCRIPTION("Power supply driver for testing");
MODULE_AUTHOR("Anton Vorontsov <cbouatmailru@...il.com>");
MODULE_LICENSE("GPL");
--
2.46.0
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