From patchwork Thu Apr 11 05:22:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 788958 Received: from mail5.25mail.st (mail5.25mail.st [74.50.62.9]) (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 504DB13C807; Thu, 11 Apr 2024 05:24:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.50.62.9 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712813044; cv=none; b=gOg9xv77LNUHXYC3MTcplG4b7aJYVLZBHsR/7YdjTLR7w3WoYM/WjC3ZkAcm5zuqMVkKZMUzJo5YkcXSoOY6rsIRjeZrmafiNL3tlNTlimZimb4Ic/9iHp6saNyGAYRpffXgaULdYV1jLnmurdRkMqZ4zLFQU5gDmgikOiN41LA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712813044; c=relaxed/simple; bh=RxRBurBGdPk3v0RcZD82O+R1FR1mCURyTzkpzUuQ/vI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=akrFvtzV3kwX4Ll1Z4oXQsLb1btD93DwKhydPdUlCNlxCm7L/PAC2bJhFtzFzYQagLsWe9DR92T8E5ZU6OBsXkTbyjJbqWZUz7q0/FGRLkxFF7XVE/hg/KvhRwdczCj60Ubw072HqSdrHjN+GlU8pwj1Z4kMMrjBpsUeG5ZPdDU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=atomide.com; spf=fail smtp.mailfrom=atomide.com; dkim=pass (2048-bit key) header.d=atomide.com header.i=@atomide.com header.b=NbzEkW4X; arc=none smtp.client-ip=74.50.62.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=atomide.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=atomide.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=atomide.com header.i=@atomide.com header.b="NbzEkW4X" Received: from localhost (91-158-86-216.elisa-laajakaista.fi [91.158.86.216]) by mail5.25mail.st (Postfix) with ESMTPSA id BEBE7603E6; Thu, 11 Apr 2024 05:23:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=atomide.com; s=25mailst; t=1712813042; bh=RxRBurBGdPk3v0RcZD82O+R1FR1mCURyTzkpzUuQ/vI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NbzEkW4XkG/SqlwO7q/4+GMiTqUo6d4uGZop/AeLCJo5hWWGv6sZYC1aZDU20pHFf 2mODQjLanR372gLIaP4F0PhidfjvQH49RpGXp7DoFpW58o47x74V3Sea+azNwDUsf4 Yg+6icKsntQIFbRkaMUCqGxoyGtR1G5P62xbuNCV28hcLEF0OZ1s/dRSZfyqLoApCx f0gxQusk0Z243byf7VMLp9ry4sFqxqH5zEfMyQZ2jbD6/4kVlgiR9tr74DZ7i6B+KU v3mDXJAMLfzcg2jRGx0Y2rx0o7vr7CJQk9myafAiUudCsddTmx0Yp2a9p9gVrzsj5r YZn52SqSJaRvw== From: Tony Lindgren To: linux-omap@vger.kernel.org Cc: Dhruva Gole , Greg Kroah-Hartman , Philipp Zabel , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: [RFC PATCH 2/4] reset: Allow removing a lookup Date: Thu, 11 Apr 2024 08:22:55 +0300 Message-ID: <20240411052257.2113-3-tony@atomide.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240411052257.2113-1-tony@atomide.com> References: <20240411052257.2113-1-tony@atomide.com> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 If a parent device provides resets for the child devices using a lookup table, let's also allow removal of the lookup table when removing the child devices. Signed-off-by: Tony Lindgren --- drivers/reset/core.c | 27 +++++++++++++++++++++++++++ include/linux/reset-controller.h | 7 +++++++ 2 files changed, 34 insertions(+) diff --git a/drivers/reset/core.c b/drivers/reset/core.c --- a/drivers/reset/core.c +++ b/drivers/reset/core.c @@ -217,6 +217,33 @@ void reset_controller_add_lookup(struct reset_control_lookup *lookup, } EXPORT_SYMBOL_GPL(reset_controller_add_lookup); +/** + * reset_controller_remove_lookup - unregister a set of lookup entries + * @lookup: array of reset lookup entries + * @num_entries: number of entries in the lookup array + */ +void reset_controller_remove_lookup(struct reset_control_lookup *lookup, + unsigned int num_entries) +{ + struct reset_control_lookup *entry; + unsigned int i; + + mutex_lock(&reset_lookup_mutex); + for (i = 0; i < num_entries; i++) { + entry = &lookup[i]; + + if (!entry->dev_id || !entry->provider) { + pr_warn("%s(): reset lookup entry badly specified, skipping\n", + __func__); + continue; + } + + list_del(&entry->list); + } + mutex_unlock(&reset_lookup_mutex); +} +EXPORT_SYMBOL_GPL(reset_controller_remove_lookup); + static inline struct reset_control_array * rstc_to_array(struct reset_control *rstc) { return container_of(rstc, struct reset_control_array, base); diff --git a/include/linux/reset-controller.h b/include/linux/reset-controller.h --- a/include/linux/reset-controller.h +++ b/include/linux/reset-controller.h @@ -93,6 +93,8 @@ int devm_reset_controller_register(struct device *dev, void reset_controller_add_lookup(struct reset_control_lookup *lookup, unsigned int num_entries); +void reset_controller_remove_lookup(struct reset_control_lookup *lookup, + unsigned int num_entries); #else static inline int reset_controller_register(struct reset_controller_dev *rcdev) { @@ -113,6 +115,11 @@ static inline void reset_controller_add_lookup(struct reset_control_lookup *look unsigned int num_entries) { } + +static inline void reset_controller_remove_lookup(struct reset_control_lookup *lookup, + unsigned int num_entries) +{ +} #endif #endif