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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 70368C432C3 for ; Thu, 21 Nov 2019 19:59:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 47242206CC for ; Thu, 21 Nov 2019 19:59:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="EtkFtF8C" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727166AbfKUT7U (ORCPT ); Thu, 21 Nov 2019 14:59:20 -0500 Received: from mail-wr1-f68.google.com ([209.85.221.68]:46780 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727105AbfKUT7S (ORCPT ); Thu, 21 Nov 2019 14:59:18 -0500 Received: by mail-wr1-f68.google.com with SMTP id z7so2532458wrl.13; Thu, 21 Nov 2019 11:59:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=IWDES4H6FK9m7SMVyLGPZhTPZo+2N/nXcrBq8GxN+no=; b=EtkFtF8CBsyuucSxiIa/b0wzIAJkqo0ayTpBwFGhoOff674C94s/a9kNTBEi8s/tiF UVeFzrTS1024HfPlBsdYpUIkzBFSFdcqNa9ZMpob14BfvV9iwxHCiSxJXxUaug241dSU 3y3kLuFSqQ/Ot5VJZ2U9Ru2zHTkK7NgPVQcLmRMTSmemtIEKnS4leeLwEsIhO01/xxPf aJkN85hmqBRynBBiOW8ocTvMDArMMdDJ2956VVZZ82eZxgQOJkDg397ve1gaEGQ5fBhK IidtqFLMMxL6UmmtnJUL4tvHbLuf98xnqvFnlzMiM7USLGVRm7Av8RXFUdPFfKLvnkHF Kz7g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=IWDES4H6FK9m7SMVyLGPZhTPZo+2N/nXcrBq8GxN+no=; b=pq4G68q2bJfCO5VWZHKhXv2a3I/I6U8zvKLugo3nnHxBU/ph82DwLcaU+YPBbJK/tD Y7EOe/XdB4P91zftYdqkq8eJw1THz3gLI+r36zo8Ekn05M91rbGRdNXGvDB1gnogfVPS JxmT20NgFHf7t+sr02nKmOhYIacSjBaZv2HfRTxqWujZcdDVyya59lyislj70u+lxwYu HtZm3G8jHTuSQH/vH30kIAiVuTSv7jxFBy0LlQiE/hAieZYmY+7pihcb2SjNnXDopKSJ j6lbjHRKgcuPy+C4eEQ3XcOYWXEDcSx3pKpAhu6OjK1AC6SWUtftT6VNAd6lQHkpT9QK hiNA== X-Gm-Message-State: APjAAAVHJY1BJ7ueKU2njW4fKD6W1IdP18+IxCPwspKWPiyjqpCwpYYD nsTYMfehBxXMLYam9QXzAeI= X-Google-Smtp-Source: APXvYqzxnV1R6FQNd3QC0/8HqDTTJeYDU0/5hlp7oOWfU+vuXUM7WtJED6UShlFOpfkJH1TQUAkQbQ== X-Received: by 2002:adf:f744:: with SMTP id z4mr13248893wrp.205.1574366352692; Thu, 21 Nov 2019 11:59:12 -0800 (PST) Received: from localhost.localdomain ([2a01:e0a:1f1:d0f0::4e2b:d7ca]) by smtp.gmail.com with ESMTPSA id l4sm747124wme.4.2019.11.21.11.59.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Nov 2019 11:59:11 -0800 (PST) From: =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= To: Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Maxime Ripard , Chen-Yu Tsai , Philipp Zabel Cc: linux-pwm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com, =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= Subject: [PATCH v8 2/6] pwm: sun4i: Prefer "mod" clock to unnamed Date: Thu, 21 Nov 2019 20:58:58 +0100 Message-Id: <20191121195902.6906-3-peron.clem@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191121195902.6906-1-peron.clem@gmail.com> References: <20191121195902.6906-1-peron.clem@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org New device tree bindings called the source clock of the module "mod" when several clocks are defined. Try to get a clock called "mod" if nothing is found try to get an unnamed clock. Reviewed-by: Uwe Kleine-König Signed-off-by: Clément Péron --- drivers/pwm/pwm-sun4i.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c index e353a03ec614..369990ae7d09 100644 --- a/drivers/pwm/pwm-sun4i.c +++ b/drivers/pwm/pwm-sun4i.c @@ -362,9 +362,34 @@ static int sun4i_pwm_probe(struct platform_device *pdev) if (IS_ERR(pwm->base)) return PTR_ERR(pwm->base); - pwm->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(pwm->clk)) + /* + * All hardware variants need a source clock that is divided and + * then feeds the counter that defines the output wave form. In the + * device tree this clock is either unnamed or called "mod". + * Some variants (e.g. H6) need another clock to access the + * hardware registers; this is called "bus". + * So we request "mod" first (and ignore the corner case that a + * parent provides a "mod" clock while the right one would be the + * unnamed one of the PWM device) and if this is not found we fall + * back to the first clock of the PWM. + */ + pwm->clk = devm_clk_get_optional(&pdev->dev, "mod"); + if (IS_ERR(pwm->clk)) { + if (PTR_ERR(pwm->rst) != -EPROBE_DEFER) + dev_err(&pdev->dev, "get mod clock failed %pe\n", + pwm->clk); return PTR_ERR(pwm->clk); + } + + if (!pwm->clk) { + pwm->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(pwm->clk)) { + if (PTR_ERR(pwm->rst) != -EPROBE_DEFER) + dev_err(&pdev->dev, "get unnamed clock failed %pe\n", + pwm->clk); + return PTR_ERR(pwm->clk); + } + } pwm->rst = devm_reset_control_get_optional_shared(&pdev->dev, NULL); if (IS_ERR(pwm->rst)) { -- 2.20.1 From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= Subject: [PATCH v8 2/6] pwm: sun4i: Prefer "mod" clock to unnamed Date: Thu, 21 Nov 2019 20:58:58 +0100 Message-ID: <20191121195902.6906-3-peron.clem@gmail.com> References: <20191121195902.6906-1-peron.clem@gmail.com> Reply-To: peron.clem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Return-path: Sender: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org In-Reply-To: <20191121195902.6906-1-peron.clem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Maxime Ripard , Chen-Yu Tsai , Philipp Zabel Cc: linux-pwm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= List-Id: linux-pwm@vger.kernel.org New device tree bindings called the source clock of the module "mod" when several clocks are defined. Try to get a clock called "mod" if nothing is found try to get an unnamed clock. Reviewed-by: Uwe Kleine-K=C3=B6nig Signed-off-by: Cl=C3=A9ment P=C3=A9ron --- drivers/pwm/pwm-sun4i.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c index e353a03ec614..369990ae7d09 100644 --- a/drivers/pwm/pwm-sun4i.c +++ b/drivers/pwm/pwm-sun4i.c @@ -362,9 +362,34 @@ static int sun4i_pwm_probe(struct platform_device *pde= v) if (IS_ERR(pwm->base)) return PTR_ERR(pwm->base); =20 - pwm->clk =3D devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(pwm->clk)) + /* + * All hardware variants need a source clock that is divided and + * then feeds the counter that defines the output wave form. In the + * device tree this clock is either unnamed or called "mod". + * Some variants (e.g. H6) need another clock to access the + * hardware registers; this is called "bus". + * So we request "mod" first (and ignore the corner case that a + * parent provides a "mod" clock while the right one would be the + * unnamed one of the PWM device) and if this is not found we fall + * back to the first clock of the PWM. + */ + pwm->clk =3D devm_clk_get_optional(&pdev->dev, "mod"); + if (IS_ERR(pwm->clk)) { + if (PTR_ERR(pwm->rst) !=3D -EPROBE_DEFER) + dev_err(&pdev->dev, "get mod clock failed %pe\n", + pwm->clk); return PTR_ERR(pwm->clk); + } + + if (!pwm->clk) { + pwm->clk =3D devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(pwm->clk)) { + if (PTR_ERR(pwm->rst) !=3D -EPROBE_DEFER) + dev_err(&pdev->dev, "get unnamed clock failed %pe\n", + pwm->clk); + return PTR_ERR(pwm->clk); + } + } =20 pwm->rst =3D devm_reset_control_get_optional_shared(&pdev->dev, NULL); if (IS_ERR(pwm->rst)) { --=20 2.20.1 --=20 You received this message because you are subscribed to the Google Groups "= linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to linux-sunxi+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web, visit https://groups.google.com/d/msgid= /linux-sunxi/20191121195902.6906-3-peron.clem%40gmail.com. 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Thu, 21 Nov 2019 11:59:11 -0800 (PST) From: =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= To: Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Maxime Ripard , Chen-Yu Tsai , Philipp Zabel Subject: [PATCH v8 2/6] pwm: sun4i: Prefer "mod" clock to unnamed Date: Thu, 21 Nov 2019 20:58:58 +0100 Message-Id: <20191121195902.6906-3-peron.clem@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191121195902.6906-1-peron.clem@gmail.com> References: <20191121195902.6906-1-peron.clem@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191121_115914_145419_68DEF5B0 X-CRM114-Status: GOOD ( 16.21 ) 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: , Cc: linux-pwm@vger.kernel.org, linux-sunxi@googlegroups.com, =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org 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 TmV3IGRldmljZSB0cmVlIGJpbmRpbmdzIGNhbGxlZCB0aGUgc291cmNlIGNsb2NrIG9mIHRoZSBt b2R1bGUKIm1vZCIgd2hlbiBzZXZlcmFsIGNsb2NrcyBhcmUgZGVmaW5lZC4KClRyeSB0byBnZXQg YSBjbG9jayBjYWxsZWQgIm1vZCIgaWYgbm90aGluZyBpcyBmb3VuZCB0cnkgdG8gZ2V0CmFuIHVu bmFtZWQgY2xvY2suCgpSZXZpZXdlZC1ieTogVXdlIEtsZWluZS1Lw7ZuaWcgPHUua2xlaW5lLWtv ZW5pZ0BwZW5ndXRyb25peC5kZT4KU2lnbmVkLW9mZi1ieTogQ2zDqW1lbnQgUMOpcm9uIDxwZXJv bi5jbGVtQGdtYWlsLmNvbT4KLS0tCiBkcml2ZXJzL3B3bS9wd20tc3VuNGkuYyB8IDI5ICsrKysr KysrKysrKysrKysrKysrKysrKysrKy0tCiAxIGZpbGUgY2hhbmdlZCwgMjcgaW5zZXJ0aW9ucygr KSwgMiBkZWxldGlvbnMoLSkKCmRpZmYgLS1naXQgYS9kcml2ZXJzL3B3bS9wd20tc3VuNGkuYyBi L2RyaXZlcnMvcHdtL3B3bS1zdW40aS5jCmluZGV4IGUzNTNhMDNlYzYxNC4uMzY5OTkwYWU3ZDA5 IDEwMDY0NAotLS0gYS9kcml2ZXJzL3B3bS9wd20tc3VuNGkuYworKysgYi9kcml2ZXJzL3B3bS9w d20tc3VuNGkuYwpAQCAtMzYyLDkgKzM2MiwzNCBAQCBzdGF0aWMgaW50IHN1bjRpX3B3bV9wcm9i ZShzdHJ1Y3QgcGxhdGZvcm1fZGV2aWNlICpwZGV2KQogCWlmIChJU19FUlIocHdtLT5iYXNlKSkK IAkJcmV0dXJuIFBUUl9FUlIocHdtLT5iYXNlKTsKIAotCXB3bS0+Y2xrID0gZGV2bV9jbGtfZ2V0 KCZwZGV2LT5kZXYsIE5VTEwpOwotCWlmIChJU19FUlIocHdtLT5jbGspKQorCS8qCisJICogQWxs IGhhcmR3YXJlIHZhcmlhbnRzIG5lZWQgYSBzb3VyY2UgY2xvY2sgdGhhdCBpcyBkaXZpZGVkIGFu ZAorCSAqIHRoZW4gZmVlZHMgdGhlIGNvdW50ZXIgdGhhdCBkZWZpbmVzIHRoZSBvdXRwdXQgd2F2 ZSBmb3JtLiBJbiB0aGUKKwkgKiBkZXZpY2UgdHJlZSB0aGlzIGNsb2NrIGlzIGVpdGhlciB1bm5h bWVkIG9yIGNhbGxlZCAibW9kIi4KKwkgKiBTb21lIHZhcmlhbnRzIChlLmcuIEg2KSBuZWVkIGFu b3RoZXIgY2xvY2sgdG8gYWNjZXNzIHRoZQorCSAqIGhhcmR3YXJlIHJlZ2lzdGVyczsgdGhpcyBp cyBjYWxsZWQgImJ1cyIuCisJICogU28gd2UgcmVxdWVzdCAibW9kIiBmaXJzdCAoYW5kIGlnbm9y ZSB0aGUgY29ybmVyIGNhc2UgdGhhdCBhCisJICogcGFyZW50IHByb3ZpZGVzIGEgIm1vZCIgY2xv Y2sgd2hpbGUgdGhlIHJpZ2h0IG9uZSB3b3VsZCBiZSB0aGUKKwkgKiB1bm5hbWVkIG9uZSBvZiB0 aGUgUFdNIGRldmljZSkgYW5kIGlmIHRoaXMgaXMgbm90IGZvdW5kIHdlIGZhbGwKKwkgKiBiYWNr IHRvIHRoZSBmaXJzdCBjbG9jayBvZiB0aGUgUFdNLgorCSAqLworCXB3bS0+Y2xrID0gZGV2bV9j bGtfZ2V0X29wdGlvbmFsKCZwZGV2LT5kZXYsICJtb2QiKTsKKwlpZiAoSVNfRVJSKHB3bS0+Y2xr KSkgeworCQlpZiAoUFRSX0VSUihwd20tPnJzdCkgIT0gLUVQUk9CRV9ERUZFUikKKwkJCWRldl9l cnIoJnBkZXYtPmRldiwgImdldCBtb2QgY2xvY2sgZmFpbGVkICVwZVxuIiwKKwkJCQlwd20tPmNs ayk7CiAJCXJldHVybiBQVFJfRVJSKHB3bS0+Y2xrKTsKKwl9CisKKwlpZiAoIXB3bS0+Y2xrKSB7 CisJCXB3bS0+Y2xrID0gZGV2bV9jbGtfZ2V0KCZwZGV2LT5kZXYsIE5VTEwpOworCQlpZiAoSVNf RVJSKHB3bS0+Y2xrKSkgeworCQkJaWYgKFBUUl9FUlIocHdtLT5yc3QpICE9IC1FUFJPQkVfREVG RVIpCisJCQkJZGV2X2VycigmcGRldi0+ZGV2LCAiZ2V0IHVubmFtZWQgY2xvY2sgZmFpbGVkICVw ZVxuIiwKKwkJCQkJcHdtLT5jbGspOworCQkJcmV0dXJuIFBUUl9FUlIocHdtLT5jbGspOworCQl9 CisJfQogCiAJcHdtLT5yc3QgPSBkZXZtX3Jlc2V0X2NvbnRyb2xfZ2V0X29wdGlvbmFsX3NoYXJl ZCgmcGRldi0+ZGV2LCBOVUxMKTsKIAlpZiAoSVNfRVJSKHB3bS0+cnN0KSkgewotLSAKMi4yMC4x CgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgt YXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQu b3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJt LWtlcm5lbAo=