From patchwork Fri Jul 26 18:40:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Jernej_=C5=A0krabec?= X-Patchwork-Id: 1137602 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pwm-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=siol.net Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 45wJ5W1psnz9s8m for ; Sat, 27 Jul 2019 04:49:03 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387394AbfGZSs5 (ORCPT ); Fri, 26 Jul 2019 14:48:57 -0400 Received: from mailoutvs34.siol.net ([185.57.226.225]:56216 "EHLO mail.siol.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2388225AbfGZSs5 (ORCPT ); Fri, 26 Jul 2019 14:48:57 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.siol.net (Postfix) with ESMTP id A2A8A523033; Fri, 26 Jul 2019 20:41:01 +0200 (CEST) X-Virus-Scanned: amavisd-new at psrvmta10.zcs-production.pri Received: from mail.siol.net ([127.0.0.1]) by localhost (psrvmta10.zcs-production.pri [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id ymv40tVszZwP; Fri, 26 Jul 2019 20:41:01 +0200 (CEST) Received: from mail.siol.net (localhost [127.0.0.1]) by mail.siol.net (Postfix) with ESMTPS id 61A51523030; Fri, 26 Jul 2019 20:41:01 +0200 (CEST) Received: from localhost.localdomain (cpe-194-152-11-237.cable.triera.net [194.152.11.237]) (Authenticated sender: 031275009) by mail.siol.net (Postfix) with ESMTPSA id 13799523033; Fri, 26 Jul 2019 20:40:59 +0200 (CEST) From: Jernej Skrabec To: thierry.reding@gmail.com, mripard@kernel.org, wens@csie.org Cc: robh+dt@kernel.org, mark.rutland@arm.com, linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com Subject: [PATCH 3/6] pwm: sun4i: Add a quirk for bus clock Date: Fri, 26 Jul 2019 20:40:42 +0200 Message-Id: <20190726184045.14669-4-jernej.skrabec@siol.net> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190726184045.14669-1-jernej.skrabec@siol.net> References: <20190726184045.14669-1-jernej.skrabec@siol.net> MIME-Version: 1.0 Sender: linux-pwm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org H6 PWM core needs bus clock to be enabled in order to work. Add a quirk for it. Signed-off-by: Jernej Skrabec --- drivers/pwm/pwm-sun4i.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c index 1b7be8fbde86..7d3ac3f2dc3f 100644 --- a/drivers/pwm/pwm-sun4i.c +++ b/drivers/pwm/pwm-sun4i.c @@ -72,6 +72,7 @@ static const u32 prescaler_table[] = { }; struct sun4i_pwm_data { + bool has_bus_clock; bool has_prescaler_bypass; bool has_reset; unsigned int npwm; @@ -79,6 +80,7 @@ struct sun4i_pwm_data { struct sun4i_pwm_chip { struct pwm_chip chip; + struct clk *bus_clk; struct clk *clk; struct reset_control *rst; void __iomem *base; @@ -382,6 +384,16 @@ static int sun4i_pwm_probe(struct platform_device *pdev) reset_control_deassert(pwm->rst); } + if (pwm->data->has_bus_clock) { + pwm->bus_clk = devm_clk_get(&pdev->dev, "bus"); + if (IS_ERR(pwm->bus_clk)) { + ret = PTR_ERR(pwm->bus_clk); + goto err_bus; + } + + clk_prepare_enable(pwm->bus_clk); + } + pwm->chip.dev = &pdev->dev; pwm->chip.ops = &sun4i_pwm_ops; pwm->chip.base = -1; @@ -402,6 +414,8 @@ static int sun4i_pwm_probe(struct platform_device *pdev) return 0; err_pwm_add: + clk_disable_unprepare(pwm->bus_clk); +err_bus: reset_control_assert(pwm->rst); return ret; @@ -416,6 +430,7 @@ static int sun4i_pwm_remove(struct platform_device *pdev) if (ret) return ret; + clk_disable_unprepare(pwm->bus_clk); reset_control_assert(pwm->rst); return 0;