From patchwork Fri Sep 9 17:55:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Reichel X-Patchwork-Id: 604316 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7CBFCC6FA8B for ; Fri, 9 Sep 2022 17:55:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231903AbiIIRzp (ORCPT ); Fri, 9 Sep 2022 13:55:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231391AbiIIRzh (ORCPT ); Fri, 9 Sep 2022 13:55:37 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 38D1FF0AAA; Fri, 9 Sep 2022 10:55:35 -0700 (PDT) Received: from jupiter.universe (dyndsl-095-033-168-128.ewe-ip-backbone.de [95.33.168.128]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) (Authenticated sender: sre) by madras.collabora.co.uk (Postfix) with ESMTPSA id 29F7B6601FDD; Fri, 9 Sep 2022 18:55:31 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1662746131; bh=kzk3PENOBXyzcLbtO9AejMO4H0OZ0Ng5+GZx5DRtbtY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SLvAGZAOWH9Dh3mFAsovgdhPLnvlcCj+7jBmSUCTClvBllpaXTNvsItwYkKPIoF2/ NNBHLMEmx1nJ6+GbrpC5mc2rR0hXo2hl3ffMTyLMraPFbuI6w5InFEUPygZjcziqA4 A3+iYb5Xq344FvTQEl78b1f7COgFqJ6qFvr7wIieLQq0wuJSNAx7uNQeYl/z5OZQbB zLM9qHoS7N3BiGzlUYbdBGjD5rRVRO7yVsr2BgOJZMbp/N9tBpFfckdoalBqi+kWsW cEIKhiZUogtUF8inHYE+bKLQ42ZUen8dYnEroo0YkenLA4KOZ4ul6Sb71PWNKu4d8b 6y9HRTZYiQsXg== Received: by jupiter.universe (Postfix, from userid 1000) id 2C5EE4805A5; Fri, 9 Sep 2022 19:55:27 +0200 (CEST) From: Sebastian Reichel To: Heiko Stuebner , Rob Herring , Krzysztof Kozlowski , Lee Jones Cc: Michael Turquette , Stephen Boyd , Linus Walleij , Mark Brown , Liam Girdwood , Alexandre Belloni , Alessandro Zummo , linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Sebastian Reichel , kernel@collabora.com Subject: [PATCHv3 12/14] regulator: expose regmap_find_closest_bigger Date: Fri, 9 Sep 2022 19:55:20 +0200 Message-Id: <20220909175522.179175-13-sebastian.reichel@collabora.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220909175522.179175-1-sebastian.reichel@collabora.com> References: <20220909175522.179175-1-sebastian.reichel@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Expose and document the table lookup logic used by regulator_set_ramp_delay_regmap, so that it can be reused for devices that cannot be configured via regulator_set_ramp_delay_regmap. Signed-off-by: Sebastian Reichel Acked-by: Matti Vaittinen --- drivers/regulator/helpers.c | 20 +++++++++++++++++--- include/linux/regulator/driver.h | 2 ++ 2 files changed, 19 insertions(+), 3 deletions(-) diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c index ad2237a95572..eb1f18917d05 100644 --- a/drivers/regulator/helpers.c +++ b/drivers/regulator/helpers.c @@ -902,7 +902,20 @@ bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2) } EXPORT_SYMBOL_GPL(regulator_is_equal); -static int find_closest_bigger(unsigned int target, const unsigned int *table, +/** + * regmap_find_closest_bigger - helper to find offset in ramp delay table + * + * @target: targeted ramp_delay + * @table: table with supported ramp delays + * @num_sel: number of entries in the table + * @sel: Pointer to store table offset + * + * This is the internal helper used by regulator_set_ramp_delay_regmap to + * map ramp delay to register value. It should only be used directly if + * regulator_set_ramp_delay_regmap cannot handle a specific device setup + * (e.g. because the value is split over multiple registers). + */ +int regmap_find_closest_bigger(unsigned int target, const unsigned int *table, unsigned int num_sel, unsigned int *sel) { unsigned int s, tmp, max, maxsel = 0; @@ -933,6 +946,7 @@ static int find_closest_bigger(unsigned int target, const unsigned int *table, return 0; } +EXPORT_SYMBOL_GPL(regmap_find_closest_bigger); /** * regulator_set_ramp_delay_regmap - set_ramp_delay() helper @@ -951,8 +965,8 @@ int regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay) if (WARN_ON(!rdev->desc->n_ramp_values || !rdev->desc->ramp_delay_table)) return -EINVAL; - ret = find_closest_bigger(ramp_delay, rdev->desc->ramp_delay_table, - rdev->desc->n_ramp_values, &sel); + ret = regmap_find_closest_bigger(ramp_delay, rdev->desc->ramp_delay_table, + rdev->desc->n_ramp_values, &sel); if (ret) { dev_warn(rdev_get_dev(rdev), diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index f9a7461e72b8..9501dbec64da 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -757,6 +757,8 @@ int regulator_set_current_limit_regmap(struct regulator_dev *rdev, int min_uA, int max_uA); int regulator_get_current_limit_regmap(struct regulator_dev *rdev); void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data); +int regmap_find_closest_bigger(unsigned int target, const unsigned int *table, + unsigned int num_sel, unsigned int *sel); int regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay); int regulator_sync_voltage_rdev(struct regulator_dev *rdev);