From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4896FC49EA2 for ; Tue, 15 Jun 2021 23:18:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 36E9F610CD for ; Tue, 15 Jun 2021 23:18:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231484AbhFOXUg (ORCPT ); Tue, 15 Jun 2021 19:20:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231420AbhFOXUf (ORCPT ); Tue, 15 Jun 2021 19:20:35 -0400 Received: from mail-ot1-x32d.google.com (mail-ot1-x32d.google.com [IPv6:2607:f8b0:4864:20::32d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44237C061574 for ; Tue, 15 Jun 2021 16:18:30 -0700 (PDT) Received: by mail-ot1-x32d.google.com with SMTP id p5-20020a9d45450000b029043ee61dce6bso603958oti.8 for ; Tue, 15 Jun 2021 16:18:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=pth2v3ZNP3bQI72INPpsNym5/y4d3Mf6qoAfH+N+szA=; b=EU/DAwTQl9leUMmTrZZsDJD5Uk35zXy/TcEXIrlpTuyhB9pAmmnrNPqsb9I6YBcCQ8 grHUArQsFzwNCSHwY7sKhhIVIAgnR3aJJOkKfBrexYqtCoG3l8MrlrCcRan2rNUAHOiP Urv2m4sSN9nqp/b4b1Pa2gU7C7Y4SvCWOQOMGsgMIPzIm/WMXH9tDzB/BU21nuTSzOwx JtVkL+24h0RX6rnnnKeqf/xU8pBHuHpNjy7zUMyZzKv6lU9giGcSBvr23mhSMVu22wXc s03lNt2FgbuPExJn2sR7ZG332alnZXrUWfEQ2poVziXMhCRizhp+6CO6XTs08Jvu7DIS rnSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=pth2v3ZNP3bQI72INPpsNym5/y4d3Mf6qoAfH+N+szA=; b=DDcXFDH7A93dfiU7ymwkmRiXMD3zq9deIgyAt15/hN0WFyi/FsloO5FN9MXyr/FYMo Glr7OS9ek5MlxkgdgJUoctst6PBWdbWiPuQoA8EcJj3edg6iTrtDVKADBnlvYIbJrBrU afg01DMEWdXX7R5qUWK8I2NHL5gU5GyxZarXaiBE/DJnhswSE/DBo47mm4Fsp0cD21m+ EpgRQrmm/yHGnqo+y6UsN6s553r2+tKobyfafhbxY8NF3sBHOoyplIGB9dmOVk/qL+Q1 wbNcV0V3LjkOZPedRmdAYs0gov5Ye2tWchYtYsEGXJH4V5TxitgzjcBjymVdB7Gk/awY zseQ== X-Gm-Message-State: AOAM530MTk4YFB9XdNW4MB0oCFKMvocbiHWK8/h+J06BCGAsegDci980 vX1/KjJeTO8PFDZtkGGHdimL10yWLs/yFQ== X-Google-Smtp-Source: ABdhPJynjXWcbExEX+WMCsq8eHaOR2NFHn33OXgBFDL04IufdnkVE9agWXNyimx7bcXxUI3f4LIVZw== X-Received: by 2002:a9d:1ea5:: with SMTP id n34mr1337303otn.340.1623799109568; Tue, 15 Jun 2021 16:18:29 -0700 (PDT) Received: from builder.lan (104-57-184-186.lightspeed.austtx.sbcglobal.net. [104.57.184.186]) by smtp.gmail.com with ESMTPSA id m18sm96101otr.61.2021.06.15.16.18.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Jun 2021 16:18:29 -0700 (PDT) From: Bjorn Andersson To: Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Lee Jones , Doug Anderson Cc: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org Subject: [PATCH v2 1/2] pwm: Introduce single-PWM of_xlate function Date: Tue, 15 Jun 2021 18:18:27 -0500 Message-Id: <20210615231828.835164-1-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The existing pxa driver and the upcoming addition of PWM support in the TI sn565dsi86 DSI/eDP bridge driver both has a single PWM channel and thereby a need for a of_xlate function with the period as its single argument. Introduce a common helper function in the core that can be used as of_xlate by such drivers and migrate the pxa driver to use this. Signed-off-by: Bjorn Andersson --- Changes since v1: - Pick up the optional flags cell as well drivers/pwm/core.c | 26 ++++++++++++++++++++++++++ drivers/pwm/pwm-pxa.c | 16 +--------------- include/linux/pwm.h | 2 ++ 3 files changed, 29 insertions(+), 15 deletions(-) diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index a42999f877d2..5e9c876fccc4 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -152,6 +152,32 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args) } EXPORT_SYMBOL_GPL(of_pwm_xlate_with_flags); +struct pwm_device * +of_pwm_single_xlate(struct pwm_chip *pc, const struct of_phandle_args *args) +{ + struct pwm_device *pwm; + + if (pc->of_pwm_n_cells < 1) + return ERR_PTR(-EINVAL); + + /* validate that one cell is specified, optionally with flags */ + if (args->args_count != 1 && args->args_count != 2) + return ERR_PTR(-EINVAL); + + pwm = pwm_request_from_chip(pc, 0, NULL); + if (IS_ERR(pwm)) + return pwm; + + pwm->args.period = args->args[0]; + pwm->args.polarity = PWM_POLARITY_NORMAL; + + if (args->args_count == 2 && args->args[2] & PWM_POLARITY_INVERTED) + pwm->args.polarity = PWM_POLARITY_INVERSED; + + return pwm; +} +EXPORT_SYMBOL_GPL(of_pwm_single_xlate); + static void of_pwmchip_add(struct pwm_chip *chip) { if (!chip->dev || !chip->dev->of_node) diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c index cfb683827d32..8cd82fb54483 100644 --- a/drivers/pwm/pwm-pxa.c +++ b/drivers/pwm/pwm-pxa.c @@ -148,20 +148,6 @@ static const struct platform_device_id *pxa_pwm_get_id_dt(struct device *dev) return id ? id->data : NULL; } -static struct pwm_device * -pxa_pwm_of_xlate(struct pwm_chip *pc, const struct of_phandle_args *args) -{ - struct pwm_device *pwm; - - pwm = pwm_request_from_chip(pc, 0, NULL); - if (IS_ERR(pwm)) - return pwm; - - pwm->args.period = args->args[0]; - - return pwm; -} - static int pwm_probe(struct platform_device *pdev) { const struct platform_device_id *id = platform_get_device_id(pdev); @@ -187,7 +173,7 @@ static int pwm_probe(struct platform_device *pdev) pwm->chip.npwm = (id->driver_data & HAS_SECONDARY_PWM) ? 2 : 1; if (IS_ENABLED(CONFIG_OF)) { - pwm->chip.of_xlate = pxa_pwm_of_xlate; + pwm->chip.of_xlate = of_pwm_single_xlate; pwm->chip.of_pwm_n_cells = 1; } diff --git a/include/linux/pwm.h b/include/linux/pwm.h index 5a73251d28e3..6aff1fa4fe5d 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -411,6 +411,8 @@ struct pwm_device *pwm_request_from_chip(struct pwm_chip *chip, struct pwm_device *of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args); +struct pwm_device *of_pwm_single_xlate(struct pwm_chip *pc, + const struct of_phandle_args *args); struct pwm_device *pwm_get(struct device *dev, const char *con_id); struct pwm_device *of_pwm_get(struct device *dev, struct device_node *np, -- 2.31.0