[PATCH 4/6] power: supply: sysfs: Add power_supply_show_enum_with_available() helper

From: Hans de Goede <hdegoede@redhat.com>
To: "Sebastian Reichel" <sre@kernel.org>,
	"Thomas Weißschuh" <linux@weissschuh.net>,
	"MyungJoo Ham" <myungjoo.ham@samsung.com>,
	"Chanwoo Choi" <cw00.choi@samsung.com>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Heikki Krogerus" <heikki.krogerus@linux.intel.com>,
	"Vinod Koul" <vkoul@kernel.org>,
	"Kishon Vijay Abraham I" <kishon@kernel.org>
Cc: Hans de Goede <hdegoede@redhat.com>,
	Enric Balletbo Serra <enric.balletbo@collabora.com>,
	Andrey Smirnov <andrew.smirnov@gmail.com>,
	linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-usb@vger.kernel.org, linux-phy@lists.infradead.org
Subject: [PATCH 4/6] power: supply: sysfs: Add power_supply_show_enum_with_available() helper
Date: Sat, 31 Aug 2024 16:20:37 +0200	[thread overview]
Message-ID: <20240831142039.28830-5-hdegoede@redhat.com> (raw)
In-Reply-To: <20240831142039.28830-1-hdegoede@redhat.com>

Turn power_supply_charge_behaviour_show() into a generic function for
showing enum values with their available (for writing) values shown
and the current value shown surrounded by sqaure-brackets like
the show() output for "usb_type" and "charge_behaviour".

This is a preparation patch for refactoring the "usb_type" property
handling to use a bitmask indicating available usb-types + this new
generic function.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/power/supply/power_supply_sysfs.c | 32 ++++++++++++++---------
 1 file changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index ff7e423edd57..9f21b0b54caf 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -518,31 +518,28 @@ int power_supply_uevent(const struct device *dev, struct kobj_uevent_env *env)
 	return ret;
 }
 
-ssize_t power_supply_charge_behaviour_show(struct device *dev,
-					   unsigned int available_behaviours,
-					   enum power_supply_charge_behaviour current_behaviour,
-					   char *buf)
+static ssize_t power_supply_show_enum_with_available(
+			struct device *dev, const char * const labels[], int label_count,
+			unsigned int available_values, int value, char *buf)
 {
 	bool match = false, available, active;
 	ssize_t count = 0;
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT); i++) {
-		available = available_behaviours & BIT(i);
-		active = i == current_behaviour;
+	for (i = 0; i < label_count; i++) {
+		available = available_values & BIT(i);
+		active = i == value;
 
 		if (available && active) {
-			count += sysfs_emit_at(buf, count, "[%s] ",
-					       POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
+			count += sysfs_emit_at(buf, count, "[%s] ", labels[i]);
 			match = true;
 		} else if (available) {
-			count += sysfs_emit_at(buf, count, "%s ",
-					       POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
+			count += sysfs_emit_at(buf, count, "%s ", labels[i]);
 		}
 	}
 
 	if (!match) {
-		dev_warn(dev, "driver reporting unsupported charge behaviour\n");
+		dev_warn(dev, "driver reporting unavailable enum value %d\n", value);
 		return -EINVAL;
 	}
 
@@ -551,6 +548,17 @@ ssize_t power_supply_charge_behaviour_show(struct device *dev,
 
 	return count;
 }
+
+ssize_t power_supply_charge_behaviour_show(struct device *dev,
+					   unsigned int available_behaviours,
+					   enum power_supply_charge_behaviour current_behaviour,
+					   char *buf)
+{
+	return power_supply_show_enum_with_available(
+				dev, POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT,
+				ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT),
+				available_behaviours, current_behaviour, buf);
+}
 EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_show);
 
 int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf)
-- 
2.46.0


-- 
linux-phy mailing list
linux-phy@lists.infradead.org
https://lists.infradead.org/mailman/listinfo/linux-phy
