From patchwork Thu Sep 19 22:49:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Sam Shih X-Patchwork-Id: 1164940 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=mediatek.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46ZBs61DTHz9s4Y for ; Fri, 20 Sep 2019 08:50:50 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405902AbfISWus (ORCPT ); Thu, 19 Sep 2019 18:50:48 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:30362 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S2405645AbfISWus (ORCPT ); Thu, 19 Sep 2019 18:50:48 -0400 X-UUID: 69ed344e10414a15bd61ec291e97afd3-20190920 X-UUID: 69ed344e10414a15bd61ec291e97afd3-20190920 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 1590415493; Fri, 20 Sep 2019 06:50:45 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 20 Sep 2019 06:50:39 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Fri, 20 Sep 2019 06:50:39 +0800 From: Sam Shih To: Rob Herring , Mark Rutland , Matthias Brugger , Thierry Reding CC: Ryder Lee , John Crispin , , , , , Sam Shih Subject: [PATCH v9 03/11] pwm: mediatek: remove a property "has-clks" Date: Fri, 20 Sep 2019 06:49:03 +0800 Message-ID: <1568933351-8584-4-git-send-email-sam.shih@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1568933351-8584-1-git-send-email-sam.shih@mediatek.com> References: <1568933351-8584-1-git-send-email-sam.shih@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 6995D0CD1E89DD8C55A65645E857674A0AC324C17485BA14F03EFFC00924B0E02000:8 X-MTK: N Sender: linux-pwm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org We can use fixed-clock to repair mt7628 pwm during configure from userspace. The SoC is legacy MIPS and has no complex clock tree. Due to we can get clock frequency for period calculation from DT fixed-clock, so we can remove has-clock property, and directly use devm_clk_get and clk_get_rate. Signed-off-by: Ryder Lee Signed-off-by: Sam Shih Acked-by: Uwe Kleine-Kö --- Changes since v9: Added an Acked-by tag Changes since v6: Based on fixed-clock in DT, we can remove has-clks property Changes since v5: 1. Follow reviewer's comments Make the changes of fix mt7628 pwm as a single patch Changes since v4: - Follow reviewers's comments 1. use pc->soc->has_clks to check clocks exist or not. 2. Add error message when probe() unable to get clks - Fixes bug when SoC is old mips which has no complex clock tree. if clocks not exist, use the new property from DT to apply period caculation; otherwise, use clk_get_rate to get clock frequency and apply period caculation. --- drivers/pwm/pwm-mediatek.c | 19 +++++-------------- 1 file changed, 5 insertions(+), 14 deletions(-) diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c index ebd62629e3fe..07e843aeddb1 100644 --- a/drivers/pwm/pwm-mediatek.c +++ b/drivers/pwm/pwm-mediatek.c @@ -57,7 +57,6 @@ static const char * const mtk_pwm_clk_name[MTK_CLK_MAX] = { struct mtk_pwm_platform_data { unsigned int fallback_npwms; bool pwm45_fixup; - bool has_clks; }; /** @@ -87,9 +86,6 @@ static int mtk_pwm_clk_enable(struct pwm_chip *chip, struct pwm_device *pwm) struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip); int ret; - if (!pc->soc->has_clks) - return 0; - ret = clk_prepare_enable(pc->clks[MTK_CLK_TOP]); if (ret < 0) return ret; @@ -116,9 +112,6 @@ static void mtk_pwm_clk_disable(struct pwm_chip *chip, struct pwm_device *pwm) { struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip); - if (!pc->soc->has_clks) - return; - clk_disable_unprepare(pc->clks[MTK_CLK_PWM1 + pwm->hwpwm]); clk_disable_unprepare(pc->clks[MTK_CLK_MAIN]); clk_disable_unprepare(pc->clks[MTK_CLK_TOP]); @@ -262,11 +255,13 @@ static int mtk_pwm_probe(struct platform_device *pdev) npwms = MTK_CLK_MAX - 2; } - for (i = 0; i < npwms + 2 && pc->soc->has_clks; i++) { - pc->clks[i] = devm_clk_get(&pdev->dev, mtk_pwm_clk_name[i]); + for (i = 0; i < npwms + 2 ; i++) { + pc->clks[i] = devm_clk_get(&pdev->dev, + mtk_pwm_clk_name[i]); if (IS_ERR(pc->clks[i])) { dev_err(&pdev->dev, "clock: %s fail: %ld\n", - mtk_pwm_clk_name[i], PTR_ERR(pc->clks[i])); + mtk_pwm_clk_name[i], + PTR_ERR(pc->clks[i])); return PTR_ERR(pc->clks[i]); } } @@ -297,25 +292,21 @@ static int mtk_pwm_remove(struct platform_device *pdev) static const struct mtk_pwm_platform_data mt2712_pwm_data = { .fallback_npwms = 8, .pwm45_fixup = false, - .has_clks = true, }; static const struct mtk_pwm_platform_data mt7622_pwm_data = { .fallback_npwms = 6, .pwm45_fixup = false, - .has_clks = true, }; static const struct mtk_pwm_platform_data mt7623_pwm_data = { .fallback_npwms = 5, .pwm45_fixup = true, - .has_clks = true, }; static const struct mtk_pwm_platform_data mt7628_pwm_data = { .fallback_npwms = 4, .pwm45_fixup = true, - .has_clks = false, }; static const struct of_device_id mtk_pwm_of_match[] = {