From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 42E08C31E40 for ; Tue, 6 Aug 2019 10:27:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0DD2620B1F for ; Tue, 6 Aug 2019 10:27:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="jQrTjDt8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732622AbfHFK16 (ORCPT ); Tue, 6 Aug 2019 06:27:58 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:36497 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732262AbfHFK15 (ORCPT ); Tue, 6 Aug 2019 06:27:57 -0400 Received: by mail-wm1-f68.google.com with SMTP id g67so71800867wme.1 for ; Tue, 06 Aug 2019 03:27:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:references:from:openpgp:autocrypt:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=3ENNWEjNdveoBFdFARD7mjfwAIRFVzgu16H/+0p0s3I=; b=jQrTjDt8I8HpXK0/juX3akv3mATvHi47gzAposJ2SWYp4IFsNmtg/8Ngbk7Y6HT/lQ 0afBmhpOr2R/zBhjbqOzreAD4sdHQG73Sl/qIDNp9HlarW2srcaF1hvnnBcc0owxM0oc VODeglfcQqzzVulqCMyGnLzjG5gvIgbFEYf0XG+nz1W5FeObX8T+NPdyDkkmKWnRe9gv RcAhBAAardwJsstzppe/o6/B0PmYlwmBzSGogCDHhGFCqDrqI+patW0Tjl2wvlxWSWKz ct49GW07l/Jb53D6TGNQQ+xgAfPCRUIgFhuCfeKbJFRRyLqvuPN6jc0Ll2mHNW9KBZFo lk9w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:openpgp:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=3ENNWEjNdveoBFdFARD7mjfwAIRFVzgu16H/+0p0s3I=; b=crWnjX+WFN582MYzqOP7s7GBCffRpLCGEKLUycMmQSzZxNmh5JGv4JUh24cZKfpS3j Enfx63LGF+O7nNbAe14ReyaAfaseNe4aU6AECBZ9GNZSarcYfh1J9skriL9uObUbdP1e OEcj7CLei8MKcuyIzOrcQR5mLQErGtUr3yJcRQ3gj6mVrEDU2E8R4biyZ+b7ENZFECrj V6pDesYecCGGczMX5sgObwGcxITw9iuWOV5uupxm6CqzLy939F9Nzd9iiRTrI9bkVqiY Ny+9G88ykFdLJBYW3U/eCbH2Er45vsPnq+kamGjqyiokEhKfiyAdXs0RcXBynAKyQ/iS I4sQ== X-Gm-Message-State: APjAAAUJJA6XUd8NrJAGpwxJHbxdzBXu1e/tEe04EZ6fbIVDkUt/g8gR KQONJiEu8zyE3TUCnCPdWkmdlw== X-Google-Smtp-Source: APXvYqxBoY61ESAFbWyiiw9vnfz/1IBVKHakOwf4mrsXZLPpZd7m7W4CxdRj6VtoxvuOS7Kedum9iQ== X-Received: by 2002:a05:600c:2189:: with SMTP id e9mr3813693wme.56.1565087274005; Tue, 06 Aug 2019 03:27:54 -0700 (PDT) Received: from ?IPv6:2a01:e34:ed2f:f020:5d72:314c:4797:d781? ([2a01:e34:ed2f:f020:5d72:314c:4797:d781]) by smtp.googlemail.com with ESMTPSA id k9sm62100150wmi.33.2019.08.06.03.27.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Aug 2019 03:27:53 -0700 (PDT) Subject: Re: [PATCH V5 1/5] clocksource: imx-sysctr: Add internal clock divider handle To: Anson Huang , "catalin.marinas@arm.com" , "will@kernel.org" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , "festevam@gmail.com" , dl-linux-imx , "tglx@linutronix.de" , Leonard Crestez , Aisheng Dong , Daniel Baluta , Jacky Bai , "l.stach@pengutronix.de" , Abel Vesa , "andrew.smirnov@gmail.com" , "ccaione@baylibre.com" , "angus@akkea.ca" , "agx@sigxcpu.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" References: <20190710063056.35689-1-Anson.Huang@nxp.com> From: Daniel Lezcano Openpgp: preference=signencrypt Autocrypt: addr=daniel.lezcano@linaro.org; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/08/2019 03:55, Anson Huang wrote: > Gentle ping... Coming back from vacation. It is in the pipe ... :) >> From: Anson Huang >> >> The system counter block guide states that the base clock is internally divided >> by 3 before use, that means the clock input of system counter defined in DT >> should be base clock which is normally from OSC, and then internally divided >> by 3 before use. >> >> Signed-off-by: Anson Huang >> --- >> Changes since V4: >> - to solve the clock driver probed after system counter driver issue, >> now we can easily switch to >> use fixed clock defined in DT and get its rate, then divided by 3 to >> get real clock rate for >> system counter driver, no need to add "clock-frequency" property in >> DT. >> --- >> drivers/clocksource/timer-imx-sysctr.c | 5 +++++ >> 1 file changed, 5 insertions(+) >> >> diff --git a/drivers/clocksource/timer-imx-sysctr.c >> b/drivers/clocksource/timer-imx-sysctr.c >> index fd7d680..b7c80a3 100644 >> --- a/drivers/clocksource/timer-imx-sysctr.c >> +++ b/drivers/clocksource/timer-imx-sysctr.c >> @@ -20,6 +20,8 @@ >> #define SYS_CTR_EN 0x1 >> #define SYS_CTR_IRQ_MASK 0x2 >> >> +#define SYS_CTR_CLK_DIV 0x3 >> + >> static void __iomem *sys_ctr_base; >> static u32 cmpcr; >> >> @@ -134,6 +136,9 @@ static int __init sysctr_timer_init(struct device_node >> *np) >> if (ret) >> return ret; >> >> + /* system counter clock is divided by 3 internally */ >> + to_sysctr.of_clk.rate /= SYS_CTR_CLK_DIV; >> + >> sys_ctr_base = timer_of_base(&to_sysctr); >> cmpcr = readl(sys_ctr_base + CMPCR); >> cmpcr &= ~SYS_CTR_EN; >> -- >> 2.7.4 > -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: Re: [PATCH V5 1/5] clocksource: imx-sysctr: Add internal clock divider handle References: <20190710063056.35689-1-Anson.Huang@nxp.com> From: Daniel Lezcano Message-ID: <7edad4d7-5ba2-d710-eb8d-b3ff97051a41@linaro.org> Date: Tue, 6 Aug 2019 12:27:51 +0200 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit To: Anson Huang , "catalin.marinas@arm.com" , "will@kernel.org" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , "festevam@gmail.com" , dl-linux-imx , "tglx@linutronix.de" , Leonard Crestez , Aisheng Dong , Daniel Baluta , Jacky Bai , "l.stach@pengutronix.de" , Abel Vesa , "andrew.smirnov@gmail.com" , "ccaione@baylibre.com" , "angus@akkea.ca" , "agx@sigxcpu.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" List-ID: On 06/08/2019 03:55, Anson Huang wrote: > Gentle ping... Coming back from vacation. It is in the pipe ... :) >> From: Anson Huang >> >> The system counter block guide states that the base clock is internally divided >> by 3 before use, that means the clock input of system counter defined in DT >> should be base clock which is normally from OSC, and then internally divided >> by 3 before use. >> >> Signed-off-by: Anson Huang >> --- >> Changes since V4: >> - to solve the clock driver probed after system counter driver issue, >> now we can easily switch to >> use fixed clock defined in DT and get its rate, then divided by 3 to >> get real clock rate for >> system counter driver, no need to add "clock-frequency" property in >> DT. >> --- >> drivers/clocksource/timer-imx-sysctr.c | 5 +++++ >> 1 file changed, 5 insertions(+) >> >> diff --git a/drivers/clocksource/timer-imx-sysctr.c >> b/drivers/clocksource/timer-imx-sysctr.c >> index fd7d680..b7c80a3 100644 >> --- a/drivers/clocksource/timer-imx-sysctr.c >> +++ b/drivers/clocksource/timer-imx-sysctr.c >> @@ -20,6 +20,8 @@ >> #define SYS_CTR_EN 0x1 >> #define SYS_CTR_IRQ_MASK 0x2 >> >> +#define SYS_CTR_CLK_DIV 0x3 >> + >> static void __iomem *sys_ctr_base; >> static u32 cmpcr; >> >> @@ -134,6 +136,9 @@ static int __init sysctr_timer_init(struct device_node >> *np) >> if (ret) >> return ret; >> >> + /* system counter clock is divided by 3 internally */ >> + to_sysctr.of_clk.rate /= SYS_CTR_CLK_DIV; >> + >> sys_ctr_base = timer_of_base(&to_sysctr); >> cmpcr = readl(sys_ctr_base + CMPCR); >> cmpcr &= ~SYS_CTR_EN; >> -- >> 2.7.4 > -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 8C0C0C433FF for ; 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([2a01:e34:ed2f:f020:5d72:314c:4797:d781]) by smtp.googlemail.com with ESMTPSA id k9sm62100150wmi.33.2019.08.06.03.27.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Aug 2019 03:27:53 -0700 (PDT) Subject: Re: [PATCH V5 1/5] clocksource: imx-sysctr: Add internal clock divider handle To: Anson Huang , "catalin.marinas@arm.com" , "will@kernel.org" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , "festevam@gmail.com" , dl-linux-imx , "tglx@linutronix.de" , Leonard Crestez , Aisheng Dong , Daniel Baluta , Jacky Bai , "l.stach@pengutronix.de" , Abel Vesa , "andrew.smirnov@gmail.com" , "ccaione@baylibre.com" , "angus@akkea.ca" , "agx@sigxcpu.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" References: <20190710063056.35689-1-Anson.Huang@nxp.com> From: Daniel Lezcano Openpgp: preference=signencrypt Autocrypt: addr=daniel.lezcano@linaro.org; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190806_032756_108484_47C131C2 X-CRM114-Status: GOOD ( 16.47 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMDYvMDgvMjAxOSAwMzo1NSwgQW5zb24gSHVhbmcgd3JvdGU6Cj4gR2VudGxlIHBpbmcuLi4K CkNvbWluZyBiYWNrIGZyb20gdmFjYXRpb24uIEl0IGlzIGluIHRoZSBwaXBlIC4uLiA6KQoKPj4g RnJvbTogQW5zb24gSHVhbmcgPEFuc29uLkh1YW5nQG54cC5jb20+Cj4+Cj4+IFRoZSBzeXN0ZW0g Y291bnRlciBibG9jayBndWlkZSBzdGF0ZXMgdGhhdCB0aGUgYmFzZSBjbG9jayBpcyBpbnRlcm5h bGx5IGRpdmlkZWQKPj4gYnkgMyBiZWZvcmUgdXNlLCB0aGF0IG1lYW5zIHRoZSBjbG9jayBpbnB1 dCBvZiBzeXN0ZW0gY291bnRlciBkZWZpbmVkIGluIERUCj4+IHNob3VsZCBiZSBiYXNlIGNsb2Nr IHdoaWNoIGlzIG5vcm1hbGx5IGZyb20gT1NDLCBhbmQgdGhlbiBpbnRlcm5hbGx5IGRpdmlkZWQK Pj4gYnkgMyBiZWZvcmUgdXNlLgo+Pgo+PiBTaWduZWQtb2ZmLWJ5OiBBbnNvbiBIdWFuZyA8QW5z b24uSHVhbmdAbnhwLmNvbT4KPj4gLS0tCj4+IENoYW5nZXMgc2luY2UgVjQ6Cj4+IAktIHRvIHNv bHZlIHRoZSBjbG9jayBkcml2ZXIgcHJvYmVkIGFmdGVyIHN5c3RlbSBjb3VudGVyIGRyaXZlciBp c3N1ZSwKPj4gbm93IHdlIGNhbiBlYXNpbHkgc3dpdGNoIHRvCj4+IAkgIHVzZSBmaXhlZCBjbG9j ayBkZWZpbmVkIGluIERUIGFuZCBnZXQgaXRzIHJhdGUsIHRoZW4gZGl2aWRlZCBieSAzIHRvCj4+ IGdldCByZWFsIGNsb2NrIHJhdGUgZm9yCj4+IAkgIHN5c3RlbSBjb3VudGVyIGRyaXZlciwgbm8g bmVlZCB0byBhZGQgImNsb2NrLWZyZXF1ZW5jeSIgcHJvcGVydHkgaW4KPj4gRFQuCj4+IC0tLQo+ PiAgZHJpdmVycy9jbG9ja3NvdXJjZS90aW1lci1pbXgtc3lzY3RyLmMgfCA1ICsrKysrCj4+ICAx IGZpbGUgY2hhbmdlZCwgNSBpbnNlcnRpb25zKCspCj4+Cj4+IGRpZmYgLS1naXQgYS9kcml2ZXJz L2Nsb2Nrc291cmNlL3RpbWVyLWlteC1zeXNjdHIuYwo+PiBiL2RyaXZlcnMvY2xvY2tzb3VyY2Uv dGltZXItaW14LXN5c2N0ci5jCj4+IGluZGV4IGZkN2Q2ODAuLmI3YzgwYTMgMTAwNjQ0Cj4+IC0t LSBhL2RyaXZlcnMvY2xvY2tzb3VyY2UvdGltZXItaW14LXN5c2N0ci5jCj4+ICsrKyBiL2RyaXZl cnMvY2xvY2tzb3VyY2UvdGltZXItaW14LXN5c2N0ci5jCj4+IEBAIC0yMCw2ICsyMCw4IEBACj4+ ICAjZGVmaW5lIFNZU19DVFJfRU4JCTB4MQo+PiAgI2RlZmluZSBTWVNfQ1RSX0lSUV9NQVNLCTB4 Mgo+Pgo+PiArI2RlZmluZSBTWVNfQ1RSX0NMS19ESVYJCTB4Mwo+PiArCj4+ICBzdGF0aWMgdm9p ZCBfX2lvbWVtICpzeXNfY3RyX2Jhc2U7Cj4+ICBzdGF0aWMgdTMyIGNtcGNyOwo+Pgo+PiBAQCAt MTM0LDYgKzEzNiw5IEBAIHN0YXRpYyBpbnQgX19pbml0IHN5c2N0cl90aW1lcl9pbml0KHN0cnVj dCBkZXZpY2Vfbm9kZQo+PiAqbnApCj4+ICAJaWYgKHJldCkKPj4gIAkJcmV0dXJuIHJldDsKPj4K Pj4gKwkvKiBzeXN0ZW0gY291bnRlciBjbG9jayBpcyBkaXZpZGVkIGJ5IDMgaW50ZXJuYWxseSAq Lwo+PiArCXRvX3N5c2N0ci5vZl9jbGsucmF0ZSAvPSBTWVNfQ1RSX0NMS19ESVY7Cj4+ICsKPj4g IAlzeXNfY3RyX2Jhc2UgPSB0aW1lcl9vZl9iYXNlKCZ0b19zeXNjdHIpOwo+PiAgCWNtcGNyID0g cmVhZGwoc3lzX2N0cl9iYXNlICsgQ01QQ1IpOwo+PiAgCWNtcGNyICY9IH5TWVNfQ1RSX0VOOwo+ PiAtLQo+PiAyLjcuNAo+IAoKCi0tIAogPGh0dHA6Ly93d3cubGluYXJvLm9yZy8+IExpbmFyby5v cmcg4pSCIE9wZW4gc291cmNlIHNvZnR3YXJlIGZvciBBUk0gU29DcwoKRm9sbG93IExpbmFybzog IDxodHRwOi8vd3d3LmZhY2Vib29rLmNvbS9wYWdlcy9MaW5hcm8+IEZhY2Vib29rIHwKPGh0dHA6 Ly90d2l0dGVyLmNvbS8jIS9saW5hcm9vcmc+IFR3aXR0ZXIgfAo8aHR0cDovL3d3dy5saW5hcm8u b3JnL2xpbmFyby1ibG9nLz4gQmxvZwoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1r ZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWls bWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK