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[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=ham 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-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1756439621639539845?= X-GMAIL-MSGID: =?utf-8?q?1756439621639539845?= 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: 50200 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp2088359wrn; Mon, 30 Jan 2023 01:36:25 -0800 (PST) X-Google-Smtp-Source: AK7set9r51UfnwMnMZcwRw/n2FWpbO6IEsZ9n9gHureGWd5eB/dZC85GJYUWgDB3f9fGdIYSBVTW X-Received: by 2002:a05:6a00:a18:b0:590:6a57:9904 with SMTP id p24-20020a056a000a1800b005906a579904mr20426391pfh.14.1675071384921; Mon, 30 Jan 2023 01:36:24 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1675071384; cv=none; d=google.com; s=arc-20160816; b=RjYwPtKhAQMUvuad+wsfDmy3q5ftyvbvDACDk5VpuM6JfPiW+qsdvKt3TqoYuUP5OF XO3oUMz9qy8gLKKFZrXs6RUGNoePOgj7TDbc3uqCdgyQsAVkUVutOOzz5zC7/uEMymuO m0lrXuQ0OzL4AgA7/RJqrOB08MgPaedYU4o2MghObVimrU1huHp5HC7obqO54eXtLUpn zkS3fXH1VxYiIv+56aP5Pex58AaFAvw8c6Lr7z6NKnPpmPtjDyyVVvIQ+uzJd9PQeWdO maWBZWPWI0Y9aNPK/9laQzlI507siTFReUe0yBgkpeNNrEYA5IvW9S/BO7g0TOK1q6XN Oigg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=w06XLuTGv42ExA7kvsEzi3HmqNn0e+XIKH+7gH1xWFk=; b=blDcpiTib/AYU7ZaXvc4p06kEhvbBpMycwI/ipACAgdNo8tl3n5akLt5igsIKQ16xK KkAroJ4lZZS+8CuWj86o56QEsclT0ZqjDapdJvjI18HS9K0uAflgsIf1G36Ahund9SVH 1/0M9+KHFdoLyqwGLijrLNnDS4g6ZlPlsWeam9Ssrr9VPlS6K1R1MbyTXQUswIMHyaIM fCL3p8sTpnTp8OWsyu2vQP42Ns7iwoYECe+oQQe+Ja05be+8mi1LJF2fPJc5e0lXqqMX yvJkbRP9IOiWaYs5IdNn2LYucp4ccyYOTslaVzrJ5ZWWVaFCRnQoP3JMtjc4i8XmL7Q7 r2jg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@sifive.com header.s=google header.b=PPfshnun; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. 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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=ham 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-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1756439652556513946?= X-GMAIL-MSGID: =?utf-8?q?1756439652556513946?= 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) {