From patchwork Thu Dec 5 20:46:38 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Patchwork-Id: 847733 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4EB0A1B87ED; Thu, 5 Dec 2024 20:47:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.69.126.157 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733431650; cv=none; b=HEisXthfj1ZKUxTHJPirY1ikNAh7C5fQPblOijSGi6gZ7ZeuQXHl46NnSKPGlOqDC6bt+3spbW1DR+EWWUDbzDUPhCFf8TeeJLb4T7nl09wQdeWXM+GDAZOsxmDYZSViNyeuM4yHuA4V/HyrU2ePvanBjceeNwTgxb4acZ8dIGQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733431650; c=relaxed/simple; bh=/qZLsNYmSP0RbFSEcx3FSjSAyL2XYa3JBbP1lSu7fxE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=nBSgU+dy712Q0EcBctqBmFsUOk13L6QqS8S9yMKbIcnK60QVWBtn9L09i1At/8vrXD5yXyD2lDct0xioXvAPkkVPHnhQhu27vX++NMzc/BfCvOZKxQ2537+e8upxy83xl0jXj7gXnoZyj/2Fn0oXeBRAl6cWJs+4PAxQkcnrURY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net; spf=pass smtp.mailfrom=weissschuh.net; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b=DdzmSGGk; arc=none smtp.client-ip=159.69.126.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b="DdzmSGGk" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1733431639; bh=/qZLsNYmSP0RbFSEcx3FSjSAyL2XYa3JBbP1lSu7fxE=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=DdzmSGGkilqJqEtbyjAqprtq6ZUifm+ks0KTuIrRJpUyteZMD/ynT8G5kXFlEX8fb TaEeX/7+/ELwVGN3aTKZZWwYceP34kvXhysxnbvO893Op8Nj06H3z6oztHTEZyWYIx /DFonlNr1YS8ioMlDbOCki1hy8gjFfwoz/BFP6Ow= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Thu, 05 Dec 2024 21:46:38 +0100 Subject: [PATCH v5 4/4] power: supply: cros_charge-control: implement a power supply extension Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241205-power-supply-extensions-v5-4-f0f996db4347@weissschuh.net> References: <20241205-power-supply-extensions-v5-0-f0f996db4347@weissschuh.net> In-Reply-To: <20241205-power-supply-extensions-v5-0-f0f996db4347@weissschuh.net> To: Sebastian Reichel , Armin Wolf , Hans de Goede , =?utf-8?q?Thomas_Wei=C3=9Fschuh?= , Benson Leung , Guenter Roeck , "Rafael J. Wysocki" , Len Brown Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, chrome-platform@lists.linux.dev, linux-acpi@vger.kernel.org, =?utf-8?q?Tho?= =?utf-8?q?mas_Wei=C3=9Fschuh?= X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1733431638; l=10924; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=/qZLsNYmSP0RbFSEcx3FSjSAyL2XYa3JBbP1lSu7fxE=; b=Q+SB1KiYOfK5fMUzp22GDlS0+2NwLllyAJmejPsxpFuziv3ry8qMJT5JkfgDG1rL+iSVAUDKZ pZPDF/cLRMVB5OcmVwG5WGyR86AuBvUL7sr48GDXemvtLjrJXZK/St1 X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= Power supply extensions provide an easier mechanism to implement additional properties for existing power supplies. Use that instead of reimplementing the sysfs attributes manually. Signed-off-by: Thomas Weißschuh Reviewed-by: Sebastian Reichel --- drivers/power/supply/cros_charge-control.c | 217 ++++++++++++----------------- 1 file changed, 88 insertions(+), 129 deletions(-) diff --git a/drivers/power/supply/cros_charge-control.c b/drivers/power/supply/cros_charge-control.c index 17c53591ce197d08d97c94d3d4359a282026dd7d..7f914a65f88f8ea57bf01c334d25d9b8ebaa2de7 100644 --- a/drivers/power/supply/cros_charge-control.c +++ b/drivers/power/supply/cros_charge-control.c @@ -18,13 +18,6 @@ BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE) | \ BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) -enum CROS_CHCTL_ATTR { - CROS_CHCTL_ATTR_START_THRESHOLD, - CROS_CHCTL_ATTR_END_THRESHOLD, - CROS_CHCTL_ATTR_CHARGE_BEHAVIOUR, - _CROS_CHCTL_ATTR_COUNT -}; - /* * Semantics of data *returned* from the EC API and Linux sysfs differ * slightly, also the v1 API can not return any data. @@ -41,13 +34,7 @@ struct cros_chctl_priv { struct power_supply *hooked_battery; u8 cmd_version; - /* The callbacks need to access this priv structure. - * As neither the struct device nor power_supply are under the drivers - * control, embed the attributes within priv to use with container_of(). - */ - struct device_attribute device_attrs[_CROS_CHCTL_ATTR_COUNT]; - struct attribute *attributes[_CROS_CHCTL_ATTR_COUNT]; - struct attribute_group group; + const struct power_supply_ext *psy_ext; enum power_supply_charge_behaviour current_behaviour; u8 current_start_threshold, current_end_threshold; @@ -114,124 +101,104 @@ static int cros_chctl_configure_ec(struct cros_chctl_priv *priv) return cros_chctl_send_charge_control_cmd(priv->cros_ec, priv->cmd_version, &req); } -static struct cros_chctl_priv *cros_chctl_attr_to_priv(struct attribute *attr, - enum CROS_CHCTL_ATTR idx) -{ - struct device_attribute *dev_attr = container_of(attr, struct device_attribute, attr); - - return container_of(dev_attr, struct cros_chctl_priv, device_attrs[idx]); -} +static const enum power_supply_property cros_chctl_psy_ext_props[] = { + POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR, /* has to be first for cros_chctl_psy_ext_v1 */ + POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD, + POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD, +}; -static ssize_t cros_chctl_store_threshold(struct device *dev, struct cros_chctl_priv *priv, - int is_end_threshold, const char *buf, size_t count) +static int cros_chctl_psy_ext_get_prop(struct power_supply *psy, + const struct power_supply_ext *ext, + void *data, + enum power_supply_property psp, + union power_supply_propval *val) { - int ret, val; + struct cros_chctl_priv *priv = data; - ret = kstrtoint(buf, 10, &val); - if (ret < 0) - return ret; - if (val < 0 || val > 100) + switch (psp) { + case POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD: + val->intval = priv->current_start_threshold; + return 0; + case POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD: + val->intval = priv->current_end_threshold; + return 0; + case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR: + val->intval = priv->current_behaviour; + return 0; + default: return -EINVAL; - - if (is_end_threshold) { - if (val <= priv->current_start_threshold) - return -EINVAL; - priv->current_end_threshold = val; - } else { - if (val >= priv->current_end_threshold) - return -EINVAL; - priv->current_start_threshold = val; } - - if (priv->current_behaviour == POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO) { - ret = cros_chctl_configure_ec(priv); - if (ret < 0) - return ret; - } - - return count; -} - -static ssize_t charge_control_start_threshold_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct cros_chctl_priv *priv = cros_chctl_attr_to_priv(&attr->attr, - CROS_CHCTL_ATTR_START_THRESHOLD); - - return sysfs_emit(buf, "%u\n", (unsigned int)priv->current_start_threshold); -} - -static ssize_t charge_control_start_threshold_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct cros_chctl_priv *priv = cros_chctl_attr_to_priv(&attr->attr, - CROS_CHCTL_ATTR_START_THRESHOLD); - - return cros_chctl_store_threshold(dev, priv, 0, buf, count); -} - -static ssize_t charge_control_end_threshold_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct cros_chctl_priv *priv = cros_chctl_attr_to_priv(&attr->attr, - CROS_CHCTL_ATTR_END_THRESHOLD); - - return sysfs_emit(buf, "%u\n", (unsigned int)priv->current_end_threshold); -} - -static ssize_t charge_control_end_threshold_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct cros_chctl_priv *priv = cros_chctl_attr_to_priv(&attr->attr, - CROS_CHCTL_ATTR_END_THRESHOLD); - - return cros_chctl_store_threshold(dev, priv, 1, buf, count); } -static ssize_t charge_behaviour_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct cros_chctl_priv *priv = cros_chctl_attr_to_priv(&attr->attr, - CROS_CHCTL_ATTR_CHARGE_BEHAVIOUR); - - return power_supply_charge_behaviour_show(dev, EC_CHARGE_CONTROL_BEHAVIOURS, - priv->current_behaviour, buf); -} -static ssize_t charge_behaviour_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +static int cros_chctl_psy_ext_set_prop(struct power_supply *psy, + const struct power_supply_ext *ext, + void *data, + enum power_supply_property psp, + const union power_supply_propval *val) { - struct cros_chctl_priv *priv = cros_chctl_attr_to_priv(&attr->attr, - CROS_CHCTL_ATTR_CHARGE_BEHAVIOUR); + struct cros_chctl_priv *priv = data; int ret; - ret = power_supply_charge_behaviour_parse(EC_CHARGE_CONTROL_BEHAVIOURS, buf); - if (ret < 0) - return ret; - - priv->current_behaviour = ret; + switch (psp) { + case POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD: + case POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD: + if (val->intval < 0 || val->intval > 100) + return -EINVAL; - ret = cros_chctl_configure_ec(priv); - if (ret < 0) - return ret; + if (psp == POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD) { + if (val->intval <= priv->current_start_threshold) + return -EINVAL; + priv->current_end_threshold = val->intval; + } else { + if (val->intval >= priv->current_end_threshold) + return -EINVAL; + priv->current_start_threshold = val->intval; + } + + if (priv->current_behaviour == POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO) { + ret = cros_chctl_configure_ec(priv); + if (ret < 0) + return ret; + } - return count; + return 0; + case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR: + priv->current_behaviour = val->intval; + ret = cros_chctl_configure_ec(priv); + if (ret < 0) + return ret; + return 0; + default: + return -EINVAL; + } } -static umode_t cros_chtl_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) +static int cros_chctl_psy_prop_is_writeable(struct power_supply *psy, + const struct power_supply_ext *ext, + void *data, + enum power_supply_property psp) { - struct cros_chctl_priv *priv = cros_chctl_attr_to_priv(attr, n); + return true; +} - if (priv->cmd_version < 2) { - if (n == CROS_CHCTL_ATTR_START_THRESHOLD) - return 0; - if (n == CROS_CHCTL_ATTR_END_THRESHOLD) - return 0; - } +static const struct power_supply_ext cros_chctl_psy_ext = { + .properties = cros_chctl_psy_ext_props, + .num_properties = ARRAY_SIZE(cros_chctl_psy_ext_props), + .charge_behaviours = EC_CHARGE_CONTROL_BEHAVIOURS, + .get_property = cros_chctl_psy_ext_get_prop, + .set_property = cros_chctl_psy_ext_set_prop, + .property_is_writeable = cros_chctl_psy_prop_is_writeable, +}; - return attr->mode; -} +static const struct power_supply_ext cros_chctl_psy_ext_v1 = { + .properties = cros_chctl_psy_ext_props, + .num_properties = 1, + .charge_behaviours = EC_CHARGE_CONTROL_BEHAVIOURS, + .get_property = cros_chctl_psy_ext_get_prop, + .set_property = cros_chctl_psy_ext_set_prop, + .property_is_writeable = cros_chctl_psy_prop_is_writeable, +}; static int cros_chctl_add_battery(struct power_supply *battery, struct acpi_battery_hook *hook) { @@ -241,7 +208,7 @@ static int cros_chctl_add_battery(struct power_supply *battery, struct acpi_batt return 0; priv->hooked_battery = battery; - return device_add_group(&battery->dev, &priv->group); + return power_supply_register_extension(battery, priv->psy_ext, priv); } static int cros_chctl_remove_battery(struct power_supply *battery, struct acpi_battery_hook *hook) @@ -249,7 +216,7 @@ static int cros_chctl_remove_battery(struct power_supply *battery, struct acpi_b struct cros_chctl_priv *priv = container_of(hook, struct cros_chctl_priv, battery_hook); if (priv->hooked_battery == battery) { - device_remove_group(&battery->dev, &priv->group); + power_supply_unregister_extension(battery, priv->psy_ext); priv->hooked_battery = NULL; } @@ -275,7 +242,6 @@ static int cros_chctl_probe(struct platform_device *pdev) struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent); struct cros_ec_device *cros_ec = ec_dev->ec_dev; struct cros_chctl_priv *priv; - size_t i; int ret; ret = cros_chctl_fwk_charge_control_versions(cros_ec); @@ -305,18 +271,11 @@ static int cros_chctl_probe(struct platform_device *pdev) dev_dbg(dev, "Command version: %u\n", (unsigned int)priv->cmd_version); priv->cros_ec = cros_ec; - priv->device_attrs[CROS_CHCTL_ATTR_START_THRESHOLD] = - (struct device_attribute)__ATTR_RW(charge_control_start_threshold); - priv->device_attrs[CROS_CHCTL_ATTR_END_THRESHOLD] = - (struct device_attribute)__ATTR_RW(charge_control_end_threshold); - priv->device_attrs[CROS_CHCTL_ATTR_CHARGE_BEHAVIOUR] = - (struct device_attribute)__ATTR_RW(charge_behaviour); - for (i = 0; i < _CROS_CHCTL_ATTR_COUNT; i++) { - sysfs_attr_init(&priv->device_attrs[i].attr); - priv->attributes[i] = &priv->device_attrs[i].attr; - } - priv->group.is_visible = cros_chtl_attr_is_visible; - priv->group.attrs = priv->attributes; + + if (priv->cmd_version == 1) + priv->psy_ext = &cros_chctl_psy_ext_v1; + else + priv->psy_ext = &cros_chctl_psy_ext; priv->battery_hook.name = dev_name(dev); priv->battery_hook.add_battery = cros_chctl_add_battery;