From patchwork Mon Jan 30 09:32:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nylon Chen X-Patchwork-Id: 1733780 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pwm-owner@vger.kernel.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=sifive.com header.i=@sifive.com header.a=rsa-sha256 header.s=google header.b=WfpSpboU; dkim-atps=neutral Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by legolas.ozlabs.org (Postfix) with ESMTP id 4P532R6yw4z23hg for ; Mon, 30 Jan 2023 20:35:43 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236243AbjA3Jes (ORCPT ); Mon, 30 Jan 2023 04:34:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236229AbjA3JeQ (ORCPT ); Mon, 30 Jan 2023 04:34:16 -0500 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DFF818A76 for ; Mon, 30 Jan 2023 01:32:54 -0800 (PST) Received: by mail-pj1-x1032.google.com with SMTP id o13so10553926pjg.2 for ; Mon, 30 Jan 2023 01:32:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=nxtYcVhJhYnmw9Kyf/CwQWgviswE64iGZP+l2Z32zUU=; b=WfpSpboUezsAyUDDVV9MgUHTxwU1B6vz4v5+gIu7omiVgcRS+MZhIWZsnhesnBobkJ FuricfmatL/tBgUO2Ox5jovBrabUbuVFkruA6tDgzTFQg8NdpfM1PA/DXKnbJhaaakHI UetQVLgUSxAPkniq7vGNYBLuRL/k9EnltcV5QBnMJgmh+6y3YuHI2HDK2tO2cQFuJKu1 cy34U3MGwmpRhajU5owIL9mqSuUSM6w1F3wRuOzqU7r+M/Nf66ZWml5iRBZ7ttNvwCBl HqdqkfNfe4oBmhzr0Q895sfoVszPUVnwcg2WRU1LSP9N1QpyFifC6WgQ5fm4pizh9PJA QCpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=nxtYcVhJhYnmw9Kyf/CwQWgviswE64iGZP+l2Z32zUU=; b=gRf1TnXaXeys5/+Tipi7FOL3d+jG7Wls4nmQTI+H4hMmeSxPyfkuXx/QqsLFTI80WN bbZSV+PJ+C/AuC6uPmQFWbDdpSO5qFpIFk5WF1sdDMSEax9xyNkzqAiHswAUNjMZ/YzU 3mc76ZbwcaCyclhT8Iz3eSuAEAgVQ88GYlrXtfLSzGVrEUAlTczBc5qjxaEAP3XbXAZp IQTPRTLTcZOBoPnUl2BZIjMx7KdHmOtSyKuk5TywfA2YHlIsP5pSs69OUi2UQvAaxLQh FqT3I6Fpfpo/OIwqfDRuE+l/mW/F0XAbVV8/NCJujpTXMNcoVFdcwGZkd6/wWpMKlP+k R7Iw== X-Gm-Message-State: AO0yUKXb4ipnLRqpa1rmcssSx1yhTorJhV2wnGA9wfa8K9OBcVkkVl0R WZr/W0F2OeuSSZ58C+PKFL/DLA== X-Google-Smtp-Source: AK7set+sqas1TmEZGyot0yhlXSSwa3Kkzex+Yml58yVBreADNUkvzMVeVh4R0UHw2PdTkO1Dvv9mIA== X-Received: by 2002:a05:6a20:1592:b0:be:9249:236c with SMTP id h18-20020a056a20159200b000be9249236cmr1679774pzj.35.1675071160436; Mon, 30 Jan 2023 01:32:40 -0800 (PST) Received: from hsinchu15.internal.sifive.com (59-124-168-89.hinet-ip.hinet.net. [59.124.168.89]) by smtp.gmail.com with ESMTPSA id t13-20020a6564cd000000b004db2b310f95sm6245704pgv.16.2023.01.30.01.32.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Jan 2023 01:32:40 -0800 (PST) From: Nylon Chen To: aou@eecs.berkeley.edu, conor@kernel.org, emil.renner.berthing@canonical.com, geert+renesas@glider.be, heiko@sntech.de, krzysztof.kozlowski+dt@linaro.org, palmer@dabbelt.com, paul.walmsley@sifive.com, robh+dt@kernel.org, thierry.reding@gmail.com, u.kleine-koenig@pengutronix.de, devicetree@vger.kernel.org, linux-pwm@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: nylon.chen@sifive.com, nylon7717@gmail.com, zong.li@sifive.com, greentime.hu@sifive.com, vincent.chen@sifive.com Subject: [PATCH v2 1/2] riscv: dts: sifive: unleashed/unmatched: Remove PWM controlled LED's active-low properties Date: Mon, 30 Jan 2023 17:32:28 +0800 Message-Id: <20230130093229.27489-2-nylon.chen@sifive.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20230130093229.27489-1-nylon.chen@sifive.com> References: <20230130093229.27489-1-nylon.chen@sifive.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org This removes the active-low properties of the PWM-controlled LEDs in the HiFive Unmatched device tree. The reference is hifive-unleashed-a00.pdf[0] and hifive-unmatched-schematics-v3.pdf[1]. [0]: https://sifive.cdn.prismic.io/sifive/c52a8e32-05ce-4aaf-95c8-7bf8453f8698_hifive-unleashed-a00-schematics-1.pdf [1]: https://sifive.cdn.prismic.io/sifive/6a06d6c0-6e66-49b5-8e9e-e68ce76f4192_hifive-unmatched-schematics-v3.pdf Signed-off-by: Nylon Chen Reviewed-by: Conor Dooley Acked-by: Conor Dooley --- arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts | 4 ---- arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 4 ---- 2 files changed, 8 deletions(-) diff --git a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts index 900a50526d77..7a9f336a391c 100644 --- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts +++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts @@ -50,7 +50,6 @@ led-controller { led-d1 { pwms = <&pwm0 0 7812500 PWM_POLARITY_INVERTED>; - active-low; color = ; max-brightness = <255>; label = "d1"; @@ -58,7 +57,6 @@ led-d1 { led-d2 { pwms = <&pwm0 1 7812500 PWM_POLARITY_INVERTED>; - active-low; color = ; max-brightness = <255>; label = "d2"; @@ -66,7 +64,6 @@ led-d2 { led-d3 { pwms = <&pwm0 2 7812500 PWM_POLARITY_INVERTED>; - active-low; color = ; max-brightness = <255>; label = "d3"; @@ -74,7 +71,6 @@ led-d3 { led-d4 { pwms = <&pwm0 3 7812500 PWM_POLARITY_INVERTED>; - active-low; color = ; max-brightness = <255>; label = "d4"; diff --git a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts index 07387f9c135c..11f08a545ee6 100644 --- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts +++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts @@ -52,7 +52,6 @@ led-controller-1 { led-d12 { pwms = <&pwm0 0 7812500 PWM_POLARITY_INVERTED>; - active-low; color = ; max-brightness = <255>; label = "d12"; @@ -69,19 +68,16 @@ multi-led { led-red { pwms = <&pwm0 2 7812500 PWM_POLARITY_INVERTED>; - active-low; color = ; }; led-green { pwms = <&pwm0 1 7812500 PWM_POLARITY_INVERTED>; - active-low; color = ; }; led-blue { pwms = <&pwm0 3 7812500 PWM_POLARITY_INVERTED>; - active-low; color = ; }; }; From patchwork Mon Jan 30 09:32:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nylon Chen X-Patchwork-Id: 1733779 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pwm-owner@vger.kernel.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=sifive.com header.i=@sifive.com header.a=rsa-sha256 header.s=google header.b=PPfshnun; dkim-atps=neutral Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by legolas.ozlabs.org (Postfix) with ESMTP id 4P532Q4PR1z23hg for ; Mon, 30 Jan 2023 20:35:42 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236518AbjA3Jer (ORCPT ); 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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id t13-20020a6564cd000000b004db2b310f95sm6245704pgv.16.2023.01.30.01.32.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Jan 2023 01:32:44 -0800 (PST) From: Nylon Chen To: aou@eecs.berkeley.edu, conor@kernel.org, emil.renner.berthing@canonical.com, geert+renesas@glider.be, heiko@sntech.de, krzysztof.kozlowski+dt@linaro.org, palmer@dabbelt.com, paul.walmsley@sifive.com, robh+dt@kernel.org, thierry.reding@gmail.com, u.kleine-koenig@pengutronix.de, devicetree@vger.kernel.org, linux-pwm@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: nylon.chen@sifive.com, nylon7717@gmail.com, zong.li@sifive.com, greentime.hu@sifive.com, vincent.chen@sifive.com Subject: [PATCH v2 2/2] pwm: sifive: change the PWM controlled LED algorithm Date: Mon, 30 Jan 2023 17:32:29 +0800 Message-Id: <20230130093229.27489-3-nylon.chen@sifive.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20230130093229.27489-1-nylon.chen@sifive.com> References: <20230130093229.27489-1-nylon.chen@sifive.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org The `frac` variable represents the pulse inactive time, and the result of this algorithm is the pulse active time. Therefore, we must reverse the result. The reference is SiFive FU740-C000 Manual[0]. [0]: https://sifive.cdn.prismic.io/sifive/1a82e600-1f93-4f41-b2d8-86ed8b16acba_fu740-c000-manual-v1p6.pdf Signed-off-by: Nylon Chen --- drivers/pwm/pwm-sifive.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pwm/pwm-sifive.c b/drivers/pwm/pwm-sifive.c index 62b6acc6373d..a5eda165d071 100644 --- a/drivers/pwm/pwm-sifive.c +++ b/drivers/pwm/pwm-sifive.c @@ -158,6 +158,7 @@ static int pwm_sifive_apply(struct pwm_chip *chip, struct pwm_device *pwm, frac = DIV64_U64_ROUND_CLOSEST(num, state->period); /* The hardware cannot generate a 100% duty cycle */ frac = min(frac, (1U << PWM_SIFIVE_CMPWIDTH) - 1); + frac = (1U << PWM_SIFIVE_CMPWIDTH) - 1 - frac; mutex_lock(&ddata->lock); if (state->period != ddata->approx_period) {