From patchwork Tue Aug 8 15:38:32 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Wu X-Patchwork-Id: 9888577 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id AEA09603F2 for ; Tue, 8 Aug 2017 15:48:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9FB4828827 for ; Tue, 8 Aug 2017 15:48:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7CD48288A7; Tue, 8 Aug 2017 15:48:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, RCVD_IN_DNSWL_NONE, URIBL_BLACK autolearn=no version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B96F528879 for ; Tue, 8 Aug 2017 15:48:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=IknM04aBKLou8NU7BurSJw/JdTJQRDzMRlGVxIMfIp8=; b=IlKJyTqijaZhuooqTBwYrvG+Np bXRLlQfu7Oc1d6nCf77WE0RMTZbKdNyUreGI4tT/PK8Q1Qp89Fp1h1BpH5g0cyd71m3d0x2CLbh9A LYVjWzEiFOjTOPFCh2I9qx4Thm/THQScMygOF6UZ2HGPaIzlnJjbsmViQbComPNNLFnPcODIqS6gy 9xiPhKMAd/1D5l1a7aOZ+3m0WzWasittstjeWJPpFOSWsyTwFn3JcEj+djztMIUi0kFbJq/TLtXKL aCXgI7vQGUOyVS/if5O19xO9qEW1boh1WLfWNRCh8tE1l0dqgkiA+T4AtQZeofn0ZekmumWTXebIu LbXrYVpQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1df6js-0000MP-8M; Tue, 08 Aug 2017 15:48:12 +0000 Received: from lucky1.263xmail.com ([211.157.147.130]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1df6Ws-0006eT-25; Tue, 08 Aug 2017 15:34:49 +0000 Received: from david.wu?rock-chips.com (unknown [192.168.167.11]) by lucky1.263xmail.com (Postfix) with ESMTP id 0C1FC1EEE24; Tue, 8 Aug 2017 23:34:16 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost.localdomain (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTPA id 2252B378; Tue, 8 Aug 2017 23:34:17 +0800 (CST) X-RL-SENDER: david.wu@rock-chips.com X-FST-TO: thierry.reding@gmail.com X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: david.wu@rock-chips.com X-UNIQUE-TAG: <4909773350a2882f9d5d7ec00b1bcf62> X-ATTACHMENT-NUM: 0 X-SENDER: wdc@rock-chips.com X-DNS-TYPE: 0 Received: from unknown (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith SMTP id 258928DY7OW; Tue, 08 Aug 2017 23:34:18 +0800 (CST) From: David Wu To: thierry.reding@gmail.com, heiko@sntech.de, boris.brezillon@free-electrons.com, robh+dt@kernel.org Subject: [PATCH v3 4/7] pwm: rockchip: Move the configuration of polarity from rockchip_pwm_set_enable() to rockchip_pwm_config() Date: Tue, 8 Aug 2017 23:38:32 +0800 Message-Id: <1502206715-24174-5-git-send-email-david.wu@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1502206715-24174-1-git-send-email-david.wu@rock-chips.com> References: <1502206715-24174-1-git-send-email-david.wu@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170808_083446_731405_6297D677 X-CRM114-Status: GOOD ( 12.40 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, huangtao@rock-chips.com, linux-pwm@vger.kernel.org, catalin.marinas@arm.com, briannorris@chromium.org, dianders@chromium.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, David Wu , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP It is usually possible to configure the polarity, cycle and duty all at once, so that the polarity and cycle and duty should be binding together. Move it into rockchip_pwm_config(), as well as prepared for the next atomic update commit. Signed-off-by: David Wu --- drivers/pwm/pwm-rockchip.c | 48 +++++++++++++++++++++++----------------------- 1 file changed, 24 insertions(+), 24 deletions(-) diff --git a/drivers/pwm/pwm-rockchip.c b/drivers/pwm/pwm-rockchip.c index 4bbecbd..fbd9c1a 100644 --- a/drivers/pwm/pwm-rockchip.c +++ b/drivers/pwm/pwm-rockchip.c @@ -27,6 +27,7 @@ #define PWM_DUTY_NEGATIVE (0 << 3) #define PWM_INACTIVE_NEGATIVE (0 << 4) #define PWM_INACTIVE_POSITIVE (1 << 4) +#define PWM_POLARITY_MASK (PWM_DUTY_POSITIVE | PWM_INACTIVE_POSITIVE) #define PWM_OUTPUT_LEFT (0 << 5) #define PWM_LP_DISABLE (0 << 8) @@ -123,11 +124,12 @@ static void rockchip_pwm_get_state(struct pwm_chip *chip, } static void rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, - int duty_ns, int period_ns) + struct pwm_state *state) { struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip); unsigned long period, duty; u64 clk_rate, div; + u32 ctrl; clk_rate = clk_get_rate(pc->clk); @@ -136,22 +138,31 @@ static void rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, * bits, every possible input period can be obtained using the * default prescaler value for all practical clock rate values. */ - div = clk_rate * period_ns; + div = clk_rate * state->period; period = DIV_ROUND_CLOSEST_ULL(div, pc->data->prescaler * NSEC_PER_SEC); - div = clk_rate * duty_ns; + div = clk_rate * state->duty_cycle; duty = DIV_ROUND_CLOSEST_ULL(div, pc->data->prescaler * NSEC_PER_SEC); writel(period, pc->base + pc->data->regs.period); writel(duty, pc->base + pc->data->regs.duty); + + ctrl = readl_relaxed(pc->base + pc->data->regs.ctrl); + if (pc->data->supports_polarity) { + ctrl &= ~PWM_POLARITY_MASK; + if (state->polarity == PWM_POLARITY_INVERSED) + ctrl |= PWM_DUTY_NEGATIVE | PWM_INACTIVE_POSITIVE; + else + ctrl |= PWM_DUTY_POSITIVE | PWM_INACTIVE_NEGATIVE; + } + writel(ctrl, pc->base + pc->data->regs.ctrl); } static int rockchip_pwm_enable(struct pwm_chip *chip, - struct pwm_device *pwm, - bool enable, - enum pwm_polarity polarity, - u32 enable_conf) + struct pwm_device *pwm, + bool enable, + u32 enable_conf) { struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip); int ret; @@ -163,15 +174,6 @@ static int rockchip_pwm_enable(struct pwm_chip *chip, return ret; } - if (pc->data->supports_polarity) { - if (polarity == PWM_POLARITY_INVERSED) - enable_conf |= PWM_DUTY_NEGATIVE | - PWM_INACTIVE_POSITIVE; - else - enable_conf |= PWM_DUTY_POSITIVE | - PWM_INACTIVE_NEGATIVE; - } - val = readl_relaxed(pc->base + pc->data->regs.ctrl); if (enable) @@ -199,17 +201,16 @@ static int rockchip_pwm_apply_v1(struct pwm_chip *chip, struct pwm_device *pwm, enabled = curstate.enabled; if (state->polarity != curstate.polarity && enabled) { - ret = rockchip_pwm_enable(chip, pwm, false, state->polarity, - enable_conf); + ret = rockchip_pwm_enable(chip, pwm, false, enable_conf); if (ret) return ret; enabled = false; } - rockchip_pwm_config(chip, pwm, state->duty_cycle, state->period); + rockchip_pwm_config(chip, pwm, state); if (state->enabled != enabled) ret = rockchip_pwm_enable(chip, pwm, state->enabled, - state->polarity, enable_conf); + enable_conf); return ret; } @@ -227,17 +228,16 @@ static int rockchip_pwm_apply_v2(struct pwm_chip *chip, struct pwm_device *pwm, enabled = curstate.enabled; if (state->polarity != curstate.polarity && enabled) { - ret = rockchip_pwm_enable(chip, pwm, false, state->polarity, - enable_conf); + ret = rockchip_pwm_enable(chip, pwm, false, enable_conf); if (ret) return ret; enabled = false; } - rockchip_pwm_config(chip, pwm, state->duty_cycle, state->period); + rockchip_pwm_config(chip, pwm, state); if (state->enabled != enabled) ret = rockchip_pwm_enable(chip, pwm, state->enabled, - state->polarity, enable_conf); + enable_conf); return ret; }