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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id p7-20020a170902b08700b001d733c88646sm4425376plr.216.2024.01.22.22.17.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Jan 2024 22:17:58 -0800 (PST) From: Nylon Chen To: linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org, conor@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, palmer@dabbelt.com, paul.walmsley@sifive.com, aou@eecs.berkeley.edu, thierry.reding@gmail.com, u.kleine-koenig@pengutronix.de Cc: vincent.chen@sifive.com, zong.li@sifve.com, nylon.chen@sifive.com, nylon7717@gmail.com Subject: [PATCH v7 1/3] riscv: dts: sifive: unleashed/unmatched: Remove PWM controlled LED's active-low properties Date: Tue, 23 Jan 2024 14:17:46 +0800 Message-ID: <20240123061748.8844-2-nylon.chen@sifive.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20240123061748.8844-1-nylon.chen@sifive.com> References: <20240123061748.8844-1-nylon.chen@sifive.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788861441804126347 X-GMAIL-MSGID: 1788861441804126347 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]. Link: https://sifive.cdn.prismic.io/sifive/c52a8e32-05ce-4aaf-95c8-7bf8453f8698_hifive-unleashed-a00-schematics-1.pdf [0] Link: https://sifive.cdn.prismic.io/sifive/6a06d6c0-6e66-49b5-8e9e-e68ce76f4192_hifive-unmatched-schematics-v3.pdf [1] Co-developed-by: Zong Li Signed-off-by: Zong Li Co-developed-by: Vincent Chen Signed-off-by: Vincent Chen Signed-off-by: Nylon Chen --- arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts | 12 ++++-------- arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 12 ++++-------- 2 files changed, 8 insertions(+), 16 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..06731b8c7bc3 100644 --- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts +++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts @@ -49,32 +49,28 @@ led-controller { compatible = "pwm-leds"; led-d1 { - pwms = <&pwm0 0 7812500 PWM_POLARITY_INVERTED>; - active-low; + pwms = <&pwm0 0 7812500 0>; color = ; max-brightness = <255>; label = "d1"; }; led-d2 { - pwms = <&pwm0 1 7812500 PWM_POLARITY_INVERTED>; - active-low; + pwms = <&pwm0 1 7812500 0>; color = ; max-brightness = <255>; label = "d2"; }; led-d3 { - pwms = <&pwm0 2 7812500 PWM_POLARITY_INVERTED>; - active-low; + pwms = <&pwm0 2 7812500 0>; color = ; max-brightness = <255>; label = "d3"; }; led-d4 { - pwms = <&pwm0 3 7812500 PWM_POLARITY_INVERTED>; - active-low; + pwms = <&pwm0 3 7812500 0>; 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..b328ee80693f 100644 --- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts +++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts @@ -51,8 +51,7 @@ led-controller-1 { compatible = "pwm-leds"; led-d12 { - pwms = <&pwm0 0 7812500 PWM_POLARITY_INVERTED>; - active-low; + pwms = <&pwm0 0 7812500 0>; color = ; max-brightness = <255>; label = "d12"; @@ -68,20 +67,17 @@ multi-led { label = "d2"; led-red { - pwms = <&pwm0 2 7812500 PWM_POLARITY_INVERTED>; - active-low; + pwms = <&pwm0 2 7812500 0>; color = ; }; led-green { - pwms = <&pwm0 1 7812500 PWM_POLARITY_INVERTED>; - active-low; + pwms = <&pwm0 1 7812500 0>; color = ; }; led-blue { - pwms = <&pwm0 3 7812500 PWM_POLARITY_INVERTED>; - active-low; + pwms = <&pwm0 3 7812500 0>; color = ; }; }; From patchwork Tue Jan 23 06:17:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nylon Chen X-Patchwork-Id: 190730 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:2553:b0:103:945f:af90 with SMTP id p19csp151049dyi; Mon, 22 Jan 2024 22:28:50 -0800 (PST) X-Google-Smtp-Source: AGHT+IGjR/f5BF368mRRfIsDuePQuqLTvD/BvxGV1b1SZep3+mcT6Ng3HXsiZaXphckhCx+JieIU X-Received: by 2002:a05:6808:170b:b0:3bd:9aa9:7217 with SMTP id bc11-20020a056808170b00b003bd9aa97217mr6661280oib.5.1705991329866; Mon, 22 Jan 2024 22:28:49 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1705991329; cv=pass; d=google.com; s=arc-20160816; b=UzkQR4LYuWltmaMLK+prLPnc7m6VEz62bAuHq3qWILau+1OdcjBQcCo6FPc2M2QKIE lWpuxjWBkRyB0Ii5/1LC+F84RsFbJEXSfaLpt9PXg7Bhs1SNpJbng6Y5JOn7E5YE9PwW MvF/j8vnpnujGOCuCikTHr0+GqYUijFdpbG2xD3xuV12KvVT2QjvlnN2V/CIzJVHgtmW Z+Hs4RE8Ig2HL7PehKDv2fR3WSHAjHJvldU9o405lueijnHHOmG4/Wfkg6EF7MkjM6El JTKxnGZkryJrD8Is3CMq4xz96OfBgkwGPZiuCTu+UjKXbuSGfxqB2f152Z5YtTvqu90O m/eA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:in-reply-to:message-id :date:subject:cc:to:from:dkim-signature; bh=cvJrbymRDVqsWiIagFJrDLqKjAGvymGFfMj4nY9d7Jo=; fh=47CjjQUQloFpsdVYhLLUkNEWA6N2o9aDP0IqYdYBPnk=; b=fXzYQ9M1LwsWvaqASDUjNnZYGHzB6vAFq7BzZnnu9/qBjNKmJsii3UVJDayfKjYWWi Q5mU91sOeYErmz8Kc+jsM7r/REaNovIAz2RIwR3QxSTyaGmU9mHBRF1LC+JopwSF50n5 it/6bsgbZ4KYCAJXn+UWR77Xe0PiTVum7VFC2XVv5ycwr/3mroyv4fQxoo+7/xzdb5Ty fivGkjSlhCHxqREcz4WFdkvkzr+FIi6TB5uMd76wxPAjuJkepKnoHyMHewW5ApDIHQoF Djiuen9xU6iVjtT4ZBgcO8yamGI+LAG3I790x9Sg7ZtBzb6eSoo39/ZhMSaUfTT+i5nh Y/fg== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@sifive.com header.s=google header.b=Jh0u21DP; arc=pass (i=1 spf=pass spfdomain=sifive.com dkim=pass dkdomain=sifive.com dmarc=pass fromdomain=sifive.com); spf=pass (google.com: domain of linux-kernel+bounces-34764-ouuuleilei=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-34764-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=sifive.com Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. 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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id p7-20020a170902b08700b001d733c88646sm4425376plr.216.2024.01.22.22.17.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Jan 2024 22:18:02 -0800 (PST) From: Nylon Chen To: linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org, conor@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, palmer@dabbelt.com, paul.walmsley@sifive.com, aou@eecs.berkeley.edu, thierry.reding@gmail.com, u.kleine-koenig@pengutronix.de Cc: vincent.chen@sifive.com, zong.li@sifve.com, nylon.chen@sifive.com, nylon7717@gmail.com Subject: [PATCH v7 2/3] pwm: sifive: change the PWM controlled LED algorithm Date: Tue, 23 Jan 2024 14:17:47 +0800 Message-ID: <20240123061748.8844-3-nylon.chen@sifive.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20240123061748.8844-1-nylon.chen@sifive.com> References: <20240123061748.8844-1-nylon.chen@sifive.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788861565120735466 X-GMAIL-MSGID: 1788861565120735466 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] Link: https://sifive.cdn.prismic.io/sifive/1a82e600-1f93-4f41-b2d8-86ed8b16acba_fu740-c000-manual-v1p6.pdf [0] Co-developed-by: Zong Li Signed-off-by: Zong Li Co-developed-by: Vincent Chen Signed-off-by: Vincent Chen Signed-off-by: Nylon Chen --- drivers/pwm/pwm-sifive.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/pwm/pwm-sifive.c b/drivers/pwm/pwm-sifive.c index eabddb7c7820..b07c8598bb21 100644 --- a/drivers/pwm/pwm-sifive.c +++ b/drivers/pwm/pwm-sifive.c @@ -113,6 +113,7 @@ static int pwm_sifive_get_state(struct pwm_chip *chip, struct pwm_device *pwm, u32 duty, val; duty = readl(ddata->regs + PWM_SIFIVE_PWMCMP(pwm->hwpwm)); + duty = (1U << PWM_SIFIVE_CMPWIDTH) - 1 - duty; state->enabled = duty > 0; @@ -123,11 +124,10 @@ static int pwm_sifive_get_state(struct pwm_chip *chip, struct pwm_device *pwm, state->period = ddata->real_period; state->duty_cycle = (u64)duty * ddata->real_period >> PWM_SIFIVE_CMPWIDTH; - state->polarity = PWM_POLARITY_INVERSED; + state->polarity = PWM_POLARITY_NORMAL; return 0; } - static int pwm_sifive_apply(struct pwm_chip *chip, struct pwm_device *pwm, const struct pwm_state *state) { @@ -139,7 +139,7 @@ static int pwm_sifive_apply(struct pwm_chip *chip, struct pwm_device *pwm, int ret = 0; u32 frac; - if (state->polarity != PWM_POLARITY_INVERSED) + if (state->polarity != PWM_POLARITY_NORMAL) return -EINVAL; cur_state = pwm->state; @@ -159,6 +159,7 @@ 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) { From patchwork Tue Jan 23 06:17:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nylon Chen X-Patchwork-Id: 190726 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:2553:b0:103:945f:af90 with SMTP id p19csp150435dyi; Mon, 22 Jan 2024 22:26:33 -0800 (PST) X-Google-Smtp-Source: AGHT+IHNOgetuHygaMO+Nysz5JEt+l3Q8eLy+a9tWHqprzycB3c+a1DD+W04hadMRWkgQlf8PePI X-Received: by 2002:a19:5f4b:0:b0:50e:ab9b:c1d with SMTP id a11-20020a195f4b000000b0050eab9b0c1dmr1382576lfj.37.1705991192871; Mon, 22 Jan 2024 22:26:32 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1705991192; cv=pass; d=google.com; s=arc-20160816; b=JgaQAkMFzq7fKeWm62YMSeBqkJQ8ZHyeqW/uEFIjK0jyqtR9Tl+K6sPd8CGdXECcQF /C7YtNHGg3d3RAD6HOl0eyYF/uU5aWFjwGohhy9M2NLrroUzP3JWOxYweLzCOvepqd7f +lkrgG/VattdwGjN6mM4/W52X/2vNLc69jWAGB1aVTJf4Tnfz2qQjBQp2WaOJI8uqa8F TJQlrlOdrA7avzpIeOtuy52uJurHhVJQo5ubqAf52OOkXeMYGMORmr25S6DUmi4IXBOG ATG7jE7Ka1nkpg3JQOTeVY69P48CyPBDT3b/lsXK0vnbtcq9EjiZeA4xNUZ2Op/4+iT9 p/GA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:in-reply-to:message-id :date:subject:cc:to:from:dkim-signature; bh=nYo9wXWOZdh4xBQbuTEOxrcqZQMwofEU/9c/S0MDuwU=; fh=47CjjQUQloFpsdVYhLLUkNEWA6N2o9aDP0IqYdYBPnk=; b=Fvq04TDR9FMYWCf/nA68uI6rnJ/J1A/rVOF4IjDyOHhN930XI5JsIJ9SF6L3lRCBRu 8DV9m72UynG3Vn5BTqrV2cKjW2AkHD8ZZ6yAoe/fHpgtMokypLkfneI7GhsM3zxeXa28 usDc8/HvAOH+4Efpy3IW55BVHFjQQ0t7Zo+CfQxwER05WF1HR8nc47gMYbNYb92I7yPv 82DPPVZbZRxvHbcHPtkaCPELHkj76FgRdMtMY1h+/4tHtOwWpP8nHiC3Ah0zDgQNrrhT VrRmVJTf0QkmUh4Tjp8XZbxMmAzI7nwWD7R/LYTk8EOk9fThYyC2aRclIUomXspZUFNc fWHw== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@sifive.com header.s=google header.b=Gx07QkKR; arc=pass (i=1 spf=pass spfdomain=sifive.com dkim=pass dkdomain=sifive.com dmarc=pass fromdomain=sifive.com); spf=pass (google.com: domain of linux-kernel+bounces-34765-ouuuleilei=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) smtp.mailfrom="linux-kernel+bounces-34765-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=sifive.com Received: from am.mirrors.kernel.org (am.mirrors.kernel.org. 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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id p7-20020a170902b08700b001d733c88646sm4425376plr.216.2024.01.22.22.18.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Jan 2024 22:18:06 -0800 (PST) From: Nylon Chen To: linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org, conor@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, palmer@dabbelt.com, paul.walmsley@sifive.com, aou@eecs.berkeley.edu, thierry.reding@gmail.com, u.kleine-koenig@pengutronix.de Cc: vincent.chen@sifive.com, zong.li@sifve.com, nylon.chen@sifive.com, nylon7717@gmail.com Subject: [PATCH v7 3/3] pwm: sifive: Fix the error in the idempotent test within the pwm_apply_state_debug function Date: Tue, 23 Jan 2024 14:17:48 +0800 Message-ID: <20240123061748.8844-4-nylon.chen@sifive.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20240123061748.8844-1-nylon.chen@sifive.com> References: <20240123061748.8844-1-nylon.chen@sifive.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788861421212654298 X-GMAIL-MSGID: 1788861421212654298 Round the result to the nearest whole number. This ensures that real_period is always a reasonable integer that is not lower than the actual value. e.g. $ echo 110 > /sys/devices/platform/led-controller-1/leds/d12/brightness $ .apply is not idempotent (ena=1 pol=0 1739692/4032985) -> (ena=1 pol=0 1739630/4032985) Co-developed-by: Zong Li Signed-off-by: Zong Li Signed-off-by: Nylon Chen --- drivers/pwm/pwm-sifive.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pwm/pwm-sifive.c b/drivers/pwm/pwm-sifive.c index b07c8598bb21..7cf7a76cdb44 100644 --- a/drivers/pwm/pwm-sifive.c +++ b/drivers/pwm/pwm-sifive.c @@ -101,7 +101,7 @@ static void pwm_sifive_update_clock(struct pwm_sifive_ddata *ddata, /* As scale <= 15 the shift operation cannot overflow. */ num = (unsigned long long)NSEC_PER_SEC << (PWM_SIFIVE_CMPWIDTH + scale); - ddata->real_period = div64_ul(num, rate); + ddata->real_period = DIV_ROUND_UP_ULL(num, rate); dev_dbg(ddata->chip.dev, "New real_period = %u ns\n", ddata->real_period); }