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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 31CE7CA9EB0 for ; Sun, 3 Nov 2019 20:33:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0202821D7C for ; Sun, 3 Nov 2019 20:33:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ZQUt1nmR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728209AbfKCUdu (ORCPT ); Sun, 3 Nov 2019 15:33:50 -0500 Received: from mail-wm1-f67.google.com ([209.85.128.67]:37393 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727941AbfKCUdt (ORCPT ); Sun, 3 Nov 2019 15:33:49 -0500 Received: by mail-wm1-f67.google.com with SMTP id q130so13971227wme.2; Sun, 03 Nov 2019 12:33:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=dFi/U1rLrNtYEF4KWCZeapP9LyQz1KrI3hNiOLuNA64=; b=ZQUt1nmRM2FUbzYRthgFhs63Yvguqcf4AMFDBlwueb4W6j6t/ov+SAwCrRETGaIJQE t7Fj0TE4wHI7gocR1i1BJNL7a6SwNfgkKR0cDFXrjf1/uhjbGDCusfI4cvftb9xaYGJb robrcVE2VFFshdyIr2+0902/9v7nl3r6Scx+q/dyZ34o5XhdT+a8GKrGkfdFLxJgOrQs BzHAjQVpbkqQxpoyrKCY0QiTW9Odv8Rng1REsj4TmtILsOlr2Lf1HX6TYEtJ1EMrYS4k CnLlgDEGHSyG80fmMk4Xzn5ytEbV8EOmE/abaBCZrjWpTsrx/uk0Q230j39/7fFA3h9O rqFQ== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=dFi/U1rLrNtYEF4KWCZeapP9LyQz1KrI3hNiOLuNA64=; b=SKZgwWgAn0ikvOMVv1NcY4YZlcay5xE6C0O85yc+8TnkLElyW4+UiY6q15a8PfD8LS tgbu6KYGnMLh3xPXh3dVkMEDveuK32X9BOMJ96MUcaDbbF4GyAkrbHh0pR4CcJAI9cw8 JUrBH3ORnuaA+YjVja45OtwHaTd2hu85FOR3aD09G1XB+g+JAV70MwMqTWN/klAysFtq tBqUNhIqLhCDsqzZwCIdQp2iI5J9M3n8niGy8jAV4obPoDbsBsomqHiyYGY9bht4Q2JX lbrDhRrIQ9ED99YQtxcWV1LbnxI+q8hECdyAQYtIKfhCvxBSsXXpXkly8hPEZ9FsDune O7ew== X-Gm-Message-State: APjAAAVFrWjSDssvTkIsmW8rLxzFUarczBEKOLunYeBAjgW3h9qaHSrF AZBnSS1fYLAOgm2IdkkIqRs= X-Google-Smtp-Source: APXvYqyHGuQGzFLqWSs1hRl/bS7UtXf/0vTeNiNDZ0Jn7ft1yhN53cmPZImc/ucvSmsNoFapr7/39w== X-Received: by 2002:a05:600c:21d3:: with SMTP id x19mr19936742wmj.121.1572813227311; Sun, 03 Nov 2019 12:33:47 -0800 (PST) Received: from localhost.localdomain ([2a01:e0a:1f1:d0f0::4e2b:d7ca]) by smtp.gmail.com with ESMTPSA id x16sm13644026wrp.91.2019.11.03.12.33.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Nov 2019 12:33:46 -0800 (PST) From: =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= To: Thierry Reding , =?UTF-8?q?=27Uwe=20Kleine-K=C3=B6nig=27?= , Rob Herring , Mark Rutland , Maxime Ripard , Chen-Yu Tsai Cc: linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jernej Skrabec , =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= Subject: [PATCH v2 2/7] pwm: sun4i: Add an optional probe for reset line Date: Sun, 3 Nov 2019 21:33:29 +0100 Message-Id: <20191103203334.10539-3-peron.clem@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191103203334.10539-1-peron.clem@gmail.com> References: <20191103203334.10539-1-peron.clem@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jernej Skrabec H6 PWM core needs deasserted reset line in order to work. Add an optional probe for it. Signed-off-by: Jernej Skrabec Signed-off-by: Clément Péron --- drivers/pwm/pwm-sun4i.c | 32 ++++++++++++++++++++++++++++++-- 1 file changed, 30 insertions(+), 2 deletions(-) diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c index 6f5840a1a82d..d194b8ebdb00 100644 --- a/drivers/pwm/pwm-sun4i.c +++ b/drivers/pwm/pwm-sun4i.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -78,6 +79,7 @@ struct sun4i_pwm_data { struct sun4i_pwm_chip { struct pwm_chip chip; struct clk *clk; + struct reset_control *rst; void __iomem *base; spinlock_t ctrl_lock; const struct sun4i_pwm_data *data; @@ -365,6 +367,20 @@ static int sun4i_pwm_probe(struct platform_device *pdev) if (IS_ERR(pwm->clk)) return PTR_ERR(pwm->clk); + pwm->rst = devm_reset_control_get_optional(&pdev->dev, NULL); + if (IS_ERR(pwm->rst)) { + if (PTR_ERR(pwm->rst) == -EPROBE_DEFER) + return PTR_ERR(pwm->rst); + dev_info(&pdev->dev, "no reset control found\n"); + } + + /* Deassert reset */ + ret = reset_control_deassert(pwm->rst); + if (ret) { + dev_err(&pdev->dev, "Cannot deassert reset control\n"); + return ret; + } + pwm->chip.dev = &pdev->dev; pwm->chip.ops = &sun4i_pwm_ops; pwm->chip.base = -1; @@ -377,19 +393,31 @@ static int sun4i_pwm_probe(struct platform_device *pdev) ret = pwmchip_add(&pwm->chip); if (ret < 0) { dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret); - return ret; + goto err_pwm_add; } platform_set_drvdata(pdev, pwm); return 0; + +err_pwm_add: + reset_control_assert(pwm->rst); + + return ret; } static int sun4i_pwm_remove(struct platform_device *pdev) { struct sun4i_pwm_chip *pwm = platform_get_drvdata(pdev); + int ret; + + ret = pwmchip_remove(&pwm->chip); + if (ret) + return ret; + + reset_control_assert(pwm->rst); - return pwmchip_remove(&pwm->chip); + return 0; } static struct platform_driver sun4i_pwm_driver = { -- 2.20.1 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=-9.7 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 DE599CA9EBB for ; 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