From patchwork Tue Apr 6 09:57:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UmV4LUJDIENoZW4gKOmZs+afj+i+sCk=?= X-Patchwork-Id: 12184749 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, 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 4CE65C433B4 for ; Tue, 6 Apr 2021 10:01:13 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C3B1A613C8 for ; Tue, 6 Apr 2021 10:01:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C3B1A613C8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=bzBU5BQuTgDP7EJbFqq6NjpHSOZ1ZzQ1+/FVPSNcpiA=; b=iZYEU1YQ1v/zLOZzPx3L0VNmi YKSXY3AFDurBWAw7oX6iYY2Sc9yycpLTGYrL9PEhW7ShnLCdDppVzQcBRMOcskeeQ6JaRlLrjLqTG ahP6jCyce1pDA7s7gaKn+UfKE7KIBY2UOfIJARFUKAQEBe27piuNlO+MrWuKdo0J2pVNgvG26sU8K GcLqYr7+4YscjHb73V5lR9QrCUAccXNZkyyG8m6o3KZuTERlq2n28tP0gWnN72L1z/MWyvZqK1xww Uk1lFKJzkQjAc5i9RddB2PF7L9Unx0mAdx7+O+BQfBWtat2etKMcMM4GlnSX8EF8MMAYq4cCFBt+P m9RVVolJQ==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lTiU9-002686-Nd; Tue, 06 Apr 2021 09:59:01 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lTiU4-00266Y-Bl; Tue, 06 Apr 2021 09:58:58 +0000 X-UUID: 6d40060a4280477e8a3d3aa53c6f25a7-20210406 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=Kpa8htpcV0y3voD90+eQNQosNjgcg5p0MohSFm8/Ii4=; b=cFEUUUArTYlduhxkL1j0XEMebxFI588ZK7VEzAQ89xJQctBYY/4/Fwox2LKlA1sDIglBxnB+p86gsIBGdY9+O2GG42Mae1nWEbxMaM2IJlMF22VfHb/n/LdVbCJjZuM4ZoUYPROjUhZVQeFoRTaFWbqbHIx6JV0gsRZX8vMJFl4=; X-UUID: 6d40060a4280477e8a3d3aa53c6f25a7-20210406 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1358778886; Tue, 06 Apr 2021 02:58:53 -0700 Received: from mtkmbs05n2.mediatek.inc (172.21.101.140) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 6 Apr 2021 02:58:51 -0700 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs05n2.mediatek.inc (172.21.101.140) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 6 Apr 2021 17:58:49 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 6 Apr 2021 17:58:49 +0800 From: Rex-BC Chen To: , , , CC: , , , , , Rex-BC Chen , Jitao Shi Subject: [v3,PATCH 1/3] pwm: mtk_disp: clear the clock operations Date: Tue, 6 Apr 2021 17:57:40 +0800 Message-ID: <1617703062-4251-2-git-send-email-rex-bc.chen@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1617703062-4251-1-git-send-email-rex-bc.chen@mediatek.com> References: <1617703062-4251-1-git-send-email-rex-bc.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210406_105856_728134_9EFF5CF6 X-CRM114-Status: GOOD ( 12.51 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Remove the clk_prepare from mtk_disp_pwm_probe. Remove the clk_unprepare from mtk_disp_pwm_remove. After using atomic API and get_state() function which are implemented in PATCH [2/3], [3/3], clk_prepare/clk_unprepare are useless in probe/remove function. So we remove clk_prepare/clk_unprepare in probe/remove fuinction. Signed-off-by: Rex-BC Chen Signed-off-by: Jitao Shi --- drivers/pwm/pwm-mtk-disp.c | 23 ++--------------------- 1 file changed, 2 insertions(+), 21 deletions(-) diff --git a/drivers/pwm/pwm-mtk-disp.c b/drivers/pwm/pwm-mtk-disp.c index 87c6b4bc5d43..21416a8b6b47 100644 --- a/drivers/pwm/pwm-mtk-disp.c +++ b/drivers/pwm/pwm-mtk-disp.c @@ -192,14 +192,6 @@ static int mtk_disp_pwm_probe(struct platform_device *pdev) if (IS_ERR(mdp->clk_mm)) return PTR_ERR(mdp->clk_mm); - ret = clk_prepare(mdp->clk_main); - if (ret < 0) - return ret; - - ret = clk_prepare(mdp->clk_mm); - if (ret < 0) - goto disable_clk_main; - mdp->chip.dev = &pdev->dev; mdp->chip.ops = &mtk_disp_pwm_ops; mdp->chip.base = -1; @@ -208,7 +200,7 @@ static int mtk_disp_pwm_probe(struct platform_device *pdev) ret = pwmchip_add(&mdp->chip); if (ret < 0) { dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret); - goto disable_clk_mm; + return ret; } platform_set_drvdata(pdev, mdp); @@ -227,24 +219,13 @@ static int mtk_disp_pwm_probe(struct platform_device *pdev) } return 0; - -disable_clk_mm: - clk_unprepare(mdp->clk_mm); -disable_clk_main: - clk_unprepare(mdp->clk_main); - return ret; } static int mtk_disp_pwm_remove(struct platform_device *pdev) { struct mtk_disp_pwm *mdp = platform_get_drvdata(pdev); - int ret; - - ret = pwmchip_remove(&mdp->chip); - clk_unprepare(mdp->clk_mm); - clk_unprepare(mdp->clk_main); - return ret; + return pwmchip_remove(&mdp->chip); } static const struct mtk_pwm_data mt2701_pwm_data = { From patchwork Tue Apr 6 09:57:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UmV4LUJDIENoZW4gKOmZs+afj+i+sCk=?= X-Patchwork-Id: 12184753 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, 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 7E57CC433ED for ; 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Tue, 6 Apr 2021 17:58:51 +0800 From: Rex-BC Chen To: , , , CC: , , , , , Rex-BC Chen , Jitao Shi Subject: [v3,PATCH 2/3] pwm: mtk_disp: convert the driver to atomic API Date: Tue, 6 Apr 2021 17:57:41 +0800 Message-ID: <1617703062-4251-3-git-send-email-rex-bc.chen@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1617703062-4251-1-git-send-email-rex-bc.chen@mediatek.com> References: <1617703062-4251-1-git-send-email-rex-bc.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210406_105903_193400_83E3BEEA X-CRM114-Status: GOOD ( 17.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Switch the driver to atomic API apply(). Signed-off-by: Rex-BC Chen Signed-off-by: Jitao Shi Reported-by: kernel test robot Reported-by: kernel test robot --- drivers/pwm/pwm-mtk-disp.c | 114 +++++++++++++++++++------------------ 1 file changed, 58 insertions(+), 56 deletions(-) diff --git a/drivers/pwm/pwm-mtk-disp.c b/drivers/pwm/pwm-mtk-disp.c index 21416a8b6b47..502228adf718 100644 --- a/drivers/pwm/pwm-mtk-disp.c +++ b/drivers/pwm/pwm-mtk-disp.c @@ -20,6 +20,7 @@ #define PWM_CLKDIV_SHIFT 16 #define PWM_CLKDIV_MAX 0x3ff #define PWM_CLKDIV_MASK (PWM_CLKDIV_MAX << PWM_CLKDIV_SHIFT) +#define PWM_POLARITY BIT(2) #define PWM_PERIOD_BIT_WIDTH 12 #define PWM_PERIOD_MASK ((1 << PWM_PERIOD_BIT_WIDTH) - 1) @@ -47,6 +48,7 @@ struct mtk_disp_pwm { struct clk *clk_main; struct clk *clk_mm; void __iomem *base; + bool enabled; }; static inline struct mtk_disp_pwm *to_mtk_disp_pwm(struct pwm_chip *chip) @@ -66,11 +68,11 @@ static void mtk_disp_pwm_update_bits(struct mtk_disp_pwm *mdp, u32 offset, writel(value, address); } -static int mtk_disp_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, - int duty_ns, int period_ns) +static int mtk_disp_pwm_enable(struct pwm_chip *chip, + const struct pwm_state *state) { struct mtk_disp_pwm *mdp = to_mtk_disp_pwm(chip); - u32 clk_div, period, high_width, value; + u32 clk_div, period, high_width, value, polarity; u64 div, rate; int err; @@ -84,33 +86,47 @@ static int mtk_disp_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, * period = (PWM_CLK_RATE * period_ns) / (10^9 * (clk_div + 1)) - 1 * high_width = (PWM_CLK_RATE * duty_ns) / (10^9 * (clk_div + 1)) */ + if (!mdp->enabled) { + err = clk_prepare_enable(mdp->clk_main); + if (err < 0) { + dev_err(chip->dev, "Can't enable mdp->clk_main: %d\n", + err); + return err; + } + err = clk_prepare_enable(mdp->clk_mm); + if (err < 0) { + dev_err(chip->dev, "Can't enable mdp->clk_mm: %d\n", + err); + clk_disable_unprepare(mdp->clk_main); + return err; + } + } rate = clk_get_rate(mdp->clk_main); - clk_div = div_u64(rate * period_ns, NSEC_PER_SEC) >> + clk_div = div_u64(rate * state->period, NSEC_PER_SEC) >> PWM_PERIOD_BIT_WIDTH; - if (clk_div > PWM_CLKDIV_MAX) + if (clk_div > PWM_CLKDIV_MAX) { + dev_err(chip->dev, "clock rate is too high: rate = %d Hz\n", + rate); + clk_disable_unprepare(mdp->clk_mm); + clk_disable_unprepare(mdp->clk_main); return -EINVAL; - + } div = NSEC_PER_SEC * (clk_div + 1); - period = div64_u64(rate * period_ns, div); + period = div64_u64(rate * state->period, div); if (period > 0) period--; - high_width = div64_u64(rate * duty_ns, div); + high_width = div64_u64(rate * state->duty_cycle, div); value = period | (high_width << PWM_HIGH_WIDTH_SHIFT); - - err = clk_enable(mdp->clk_main); - if (err < 0) - return err; - - err = clk_enable(mdp->clk_mm); - if (err < 0) { - clk_disable(mdp->clk_main); - return err; - } + polarity = 0; + if (state->polarity == PWM_POLARITY_INVERSED) + polarity = PWM_POLARITY; mtk_disp_pwm_update_bits(mdp, mdp->data->con0, PWM_CLKDIV_MASK, clk_div << PWM_CLKDIV_SHIFT); + mtk_disp_pwm_update_bits(mdp, mdp->data->con0, + PWM_POLARITY, polarity); mtk_disp_pwm_update_bits(mdp, mdp->data->con1, PWM_PERIOD_MASK | PWM_HIGH_WIDTH_MASK, value); @@ -122,50 +138,49 @@ static int mtk_disp_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, mtk_disp_pwm_update_bits(mdp, mdp->data->commit, mdp->data->commit_mask, 0x0); + } else { + mtk_disp_pwm_update_bits(mdp, mdp->data->bls_debug, + mdp->data->bls_debug_mask, + mdp->data->bls_debug_mask); + mtk_disp_pwm_update_bits(mdp, mdp->data->con0, + mdp->data->con0_sel, + mdp->data->con0_sel); } - clk_disable(mdp->clk_mm); - clk_disable(mdp->clk_main); - + mtk_disp_pwm_update_bits(mdp, DISP_PWM_EN, mdp->data->enable_mask, + mdp->data->enable_mask); + mdp->enabled = true; return 0; } -static int mtk_disp_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) +static int mtk_disp_pwm_disable(struct pwm_chip *chip, + const struct pwm_state *state) { struct mtk_disp_pwm *mdp = to_mtk_disp_pwm(chip); - int err; - - err = clk_enable(mdp->clk_main); - if (err < 0) - return err; - err = clk_enable(mdp->clk_mm); - if (err < 0) { - clk_disable(mdp->clk_main); - return err; + mtk_disp_pwm_update_bits(mdp, DISP_PWM_EN, mdp->data->enable_mask, + 0x0); + if (mdp->enabled) { + clk_disable_unprepare(mdp->clk_mm); + clk_disable_unprepare(mdp->clk_main); } - mtk_disp_pwm_update_bits(mdp, DISP_PWM_EN, mdp->data->enable_mask, - mdp->data->enable_mask); + mdp->enabled = false; return 0; } -static void mtk_disp_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) +static int mtk_disp_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, + const struct pwm_state *state) { - struct mtk_disp_pwm *mdp = to_mtk_disp_pwm(chip); + if (!state->enabled) + return mtk_disp_pwm_disable(chip, state); - mtk_disp_pwm_update_bits(mdp, DISP_PWM_EN, mdp->data->enable_mask, - 0x0); - - clk_disable(mdp->clk_mm); - clk_disable(mdp->clk_main); + return mtk_disp_pwm_enable(chip, state); } static const struct pwm_ops mtk_disp_pwm_ops = { - .config = mtk_disp_pwm_config, - .enable = mtk_disp_pwm_enable, - .disable = mtk_disp_pwm_disable, + .apply = mtk_disp_pwm_apply, .owner = THIS_MODULE, }; @@ -205,19 +220,6 @@ static int mtk_disp_pwm_probe(struct platform_device *pdev) platform_set_drvdata(pdev, mdp); - /* - * For MT2701, disable double buffer before writing register - * and select manual mode and use PWM_PERIOD/PWM_HIGH_WIDTH. - */ - if (!mdp->data->has_commit) { - mtk_disp_pwm_update_bits(mdp, mdp->data->bls_debug, - mdp->data->bls_debug_mask, - mdp->data->bls_debug_mask); - mtk_disp_pwm_update_bits(mdp, mdp->data->con0, - mdp->data->con0_sel, - mdp->data->con0_sel); - } - return 0; } From patchwork Tue Apr 6 09:57:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UmV4LUJDIENoZW4gKOmZs+afj+i+sCk=?= X-Patchwork-Id: 12184751 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, 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 7E552C43460 for ; Tue, 6 Apr 2021 10:01:13 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 14093613C9 for ; 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Tue, 06 Apr 2021 02:58:56 -0700 Received: from mtkmbs05n2.mediatek.inc (172.21.101.140) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 6 Apr 2021 02:58:54 -0700 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs05n2.mediatek.inc (172.21.101.140) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 6 Apr 2021 17:58:53 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 6 Apr 2021 17:58:52 +0800 From: Rex-BC Chen To: , , , CC: , , , , , Rex-BC Chen , Jitao Shi Subject: [v3,PATCH 3/3] pwm: mtk_disp: implement .get_state() Date: Tue, 6 Apr 2021 17:57:42 +0800 Message-ID: <1617703062-4251-4-git-send-email-rex-bc.chen@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1617703062-4251-1-git-send-email-rex-bc.chen@mediatek.com> References: <1617703062-4251-1-git-send-email-rex-bc.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210406_105903_196708_51C64B54 X-CRM114-Status: GOOD ( 10.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org implement get_state function for pwm-mtk-disp Signed-off-by: Rex-BC Chen Signed-off-by: Jitao Shi --- drivers/pwm/pwm-mtk-disp.c | 46 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/drivers/pwm/pwm-mtk-disp.c b/drivers/pwm/pwm-mtk-disp.c index 502228adf718..166e0a8ca703 100644 --- a/drivers/pwm/pwm-mtk-disp.c +++ b/drivers/pwm/pwm-mtk-disp.c @@ -179,8 +179,54 @@ static int mtk_disp_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, return mtk_disp_pwm_enable(chip, state); } +static void mtk_disp_pwm_get_state(struct pwm_chip *chip, + struct pwm_device *pwm, + struct pwm_state *state) +{ + struct mtk_disp_pwm *mdp = to_mtk_disp_pwm(chip); + u32 clk_div, period, high_width, con0, con1; + u64 rate; + int err; + + err = clk_prepare_enable(mdp->clk_main); + if (err < 0) { + dev_err(chip->dev, "Can't enable mdp->clk_main: %d\n", err); + return; + } + err = clk_prepare_enable(mdp->clk_mm); + if (err < 0) { + dev_err(chip->dev, "Can't enable mdp->clk_mm: %d\n", err); + clk_disable_unprepare(mdp->clk_main); + return; + } + + rate = clk_get_rate(mdp->clk_main); + + con0 = readl(mdp->base + mdp->data->con0); + con1 = readl(mdp->base + mdp->data->con1); + + state->polarity = con0 & PWM_POLARITY ? + PWM_POLARITY_INVERSED : PWM_POLARITY_NORMAL; + state->enabled = !!(con0 & BIT(0)); + + clk_div = (con0 & PWM_CLKDIV_MASK) >> PWM_CLKDIV_SHIFT; + period = con1 & PWM_PERIOD_MASK; + state->period = div_u64(period * (clk_div + 1) * NSEC_PER_SEC, rate); + high_width = (con1 & PWM_HIGH_WIDTH_MASK) >> PWM_HIGH_WIDTH_SHIFT; + state->duty_cycle = div_u64(high_width * (clk_div + 1) * NSEC_PER_SEC, + rate); + + if (!state->enabled) { + clk_disable_unprepare(mdp->clk_mm); + clk_disable_unprepare(mdp->clk_main); + } + + mdp->enabled = state->enabled; +} + static const struct pwm_ops mtk_disp_pwm_ops = { .apply = mtk_disp_pwm_apply, + .get_state = mtk_disp_pwm_get_state, .owner = THIS_MODULE, };