From nobody Tue Apr 7 11:25:05 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D4153C6A4B for ; Fri, 13 Mar 2026 16:44:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773420248; cv=none; b=h0Ye0ClJZEWU43Aw0RUtC+UVBuhO1yvsQpXRQuEehEZvGUMW4wmqz6GtZpOfg64NGXsF1JvHB2SuyNeXrOLicB2IwfpPygdtT6ct1+QDmA+kWMFvxEyGwiV+kFnmUtYFfYy3Kn9jh+TrGMG3Mok9ctmFvJRRwSSXq8fvfbL0dJ8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773420248; c=relaxed/simple; bh=7MaJmt+J8vsEg1l63G/wlfY1QJg69trFaQ3v7+1mC38=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=I5cLgHQnEDCSkQs4qM20b7NonognDyn3N7yv0YIbRbLbRWZcFzDonw/XSYD531VqRKVrDvWYccAVjg7DNcjAP57efrJi9rcK2hH6tznML4QIbPQ+9Jhd52SI1DjmDxzjg+HIiGLrHWCshtAFnUz41ZK9oJd8XF1jQgfd9xev33U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=JiakUt8T; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b=i4xBUHt+; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="JiakUt8T"; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b="i4xBUHt+" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1773420246; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Bax8hgFhPtnOfYoq3Khs9YZNS/fmFeyi7E52H3ZxM4M=; b=JiakUt8TDyEA8l10a6ZPIzJo65GtfRpeKxoeEm5AX3Pn0Nlr2KAO+F9Pb2IaV9wL0aVOkz UYXUew02B5q5sJ37HLuOACYGoauJDf4fErJIrqPtqAouBH1vkfak/gPSQ+2GlZVn8YpUh7 Mk4bLvxjbEBcKM27yraw+zl5NX3XCzI= Received: from mail-qk1-f198.google.com (mail-qk1-f198.google.com [209.85.222.198]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-595-H8USrjqOMMW3KkPMDNUKog-1; Fri, 13 Mar 2026 12:44:05 -0400 X-MC-Unique: H8USrjqOMMW3KkPMDNUKog-1 X-Mimecast-MFC-AGG-ID: H8USrjqOMMW3KkPMDNUKog_1773420245 Received: by mail-qk1-f198.google.com with SMTP id af79cd13be357-8cd83cfb36cso1598327685a.3 for ; Fri, 13 Mar 2026 09:44:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=google; t=1773420244; x=1774025044; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=Bax8hgFhPtnOfYoq3Khs9YZNS/fmFeyi7E52H3ZxM4M=; b=i4xBUHt+bFu8zoCsCq57nHoBWE/TOc0tC2fddcpHKogTlEAaxnoBUuT4F2fEawKRbI GWd1Ocmy1Ps2ShgFstK1cgZ7nkl46jJQots42MEy72gDFTjo3MtrNLTBv2t3+Xui6t++ GxK+wBRCRMWTxXQnAyURXp7T0uLwhxV4U5djGu+jfnPxE2VEEAqSL1RqYbDFZp/vOhF7 PdEupqtfeOqmtolQJHJnX9K/8ic1dDWXmUfNgfJPHPaj62jU3/miV5EOiLl6WhGbMUZe Z3Wn9Qz0eSDDgfVYsVYbAk0bppGwi2mvP7Ilyd6Zv0WrBa8/HeytzxVFaFbQ+gh8gWFK e/Xw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773420244; x=1774025044; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=Bax8hgFhPtnOfYoq3Khs9YZNS/fmFeyi7E52H3ZxM4M=; b=EWzKtEndrPnqCXAfbBV8MdufMIhlwK9pzHLm1TpP8vgwR33eO/U5vYWzU3JD2/a1Cd JIMheeo1G3uFEB58tT7aAdncRo4hD1P/ZBdF/zYsbLPAU1PfNFs4vXqxkeEG37dexQRn /ckkglnC+fox/MdwfRaU+dC3ZuzcuhRfRPu66L0wSrAbLRnkHQN7gbPTmJaqFeJNYGfR 6qyFs9vUKXxak6J/pMfodAMUdcPGw3qf0C6OEdv2YcX8k00H2xKl6phyTUJBUj0C9hTu Bc96BLQnXxmsmx5PYb97RnqDvSgvBP4P+Ypk7dmbCZIACPenp845hSp/6qEinaNyM4l8 GkwQ== X-Forwarded-Encrypted: i=1; AJvYcCX98843QdsCGTu+EYLhmWyZ8VjaxjYtJhqObybKSgdV1pTxHWzFbVaiHVMOLDBL9AbRRuBlYlcjjBaQecE=@vger.kernel.org X-Gm-Message-State: AOJu0YxnhlaXS17kDOHJkFUUBrHBa5gXrV05QhNA1MzdjITW34Q6xb50 e8EGJToOxcdmIP3fOrPTCjRm5/K1R7iN9XGdWV8R4JvSG+45X4HJvOSVRBZeAil0v1yvQviRt+/ ao3FQ0HlkAVvsQQwzsPHXmqwbqXfM2zBrWfLub0yx20ldKnoJcqV2vF38ipLddWhCXA== X-Gm-Gg: ATEYQzx7kqRgZX54IXdZfmKBP41w/I39vkTP51D9o7TnrC+2S38d24T6tMPBx2ahpm7 8cA3nCuMhyL6zeYYQc+2bnU9ATFZezxJLTzsKslJ2Ay8oLJBOVPNF61H+UuLANW4xbJgGJrTJO8 0ct/58ASTo4rNcXN8JImB1NgEqLlRUzEFP1elfBO3Zz2LCOHI8caVXfoyBQx3EYZssHZL1i5nsH Q6VxzNpWUTsBl+YE2dyzLKPwZ6YCCZu/cwLUXXBDrmBNbxqHVoBM7owVQjavGjGvPR9RdEWFkFs azrRVyeWfc8mTUQYdDSfRkD0EuyElvEUH530fXc2J9nFtHdD+xUVLiIcLuPeBZkxU7cg5XWNcUB ZogYDKgZ0Wzf5VBNIT+fQf4BAn+Fk8O6xoke7N+QQR5mo74iZG4wOJD9tKEiP X-Received: by 2002:a05:620a:711a:b0:8cd:9033:1724 with SMTP id af79cd13be357-8cdb5a402a9mr534035685a.9.1773420244575; Fri, 13 Mar 2026 09:44:04 -0700 (PDT) X-Received: by 2002:a05:620a:711a:b0:8cd:9033:1724 with SMTP id af79cd13be357-8cdb5a402a9mr534030685a.9.1773420244072; Fri, 13 Mar 2026 09:44:04 -0700 (PDT) Received: from [192.168.1.3] (c-73-183-52-120.hsd1.pa.comcast.net. [73.183.52.120]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8cda215c2a9sm587964785a.46.2026.03.13.09.44.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Mar 2026 09:44:03 -0700 (PDT) From: Brian Masney Date: Fri, 13 Mar 2026 12:43:08 -0400 Subject: [PATCH v6 1/7] clk: test: introduce clk_dummy_div for a mock divider Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260313-clk-scaling-v6-1-ce89968c5247@redhat.com> References: <20260313-clk-scaling-v6-0-ce89968c5247@redhat.com> In-Reply-To: <20260313-clk-scaling-v6-0-ce89968c5247@redhat.com> To: Michael Turquette , Stephen Boyd , Maxime Ripard , Alberto Ruiz Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Brian Masney X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2200; i=bmasney@redhat.com; s=20250903; h=from:subject:message-id; bh=7MaJmt+J8vsEg1l63G/wlfY1QJg69trFaQ3v7+1mC38=; b=owGbwMvMwCW2/dJd9di6A+2Mp9WSGDK32B0+FO/OJdn57smPZpMZMrFPtR2Sle8ed7s0Y+qNo uPL5y3X6ChlYRDjYpAVU2RZkmtUEJG6yvbeHU0WmDmsTCBDGLg4BWAiIl4Mf2Ui5Zns/+VPmLev pv/NPoe6OreHtYJZWpZs+7LzShu72RkZNr02bvmfxL7l+aqSB6qf51zZOe//Ge5Z7GcmXej+HmW ZyggA X-Developer-Key: i=bmasney@redhat.com; a=openpgp; fpr=A46D32705865AA3DDEDC2904B7D2DD275D7EC087 This is used to mock up a divider in the clk kunit tests. Link: https://lore.kernel.org/linux-clk/aUSWU7UymULCXOeF@redhat.com/ Link: https://lpc.events/event/19/contributions/2152/ Signed-off-by: Brian Masney Reviewed-by: Maxime Ripard --- drivers/clk/clk_test.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/clk/clk_test.c b/drivers/clk/clk_test.c index a268d7b5d4cb28ec1f029f828c31107f8e130556..88e35f4419c958983578750356a= 97c0a45effb55 100644 --- a/drivers/clk/clk_test.c +++ b/drivers/clk/clk_test.c @@ -136,6 +136,50 @@ static const struct clk_ops clk_dummy_single_parent_op= s =3D { .get_parent =3D clk_dummy_single_get_parent, }; =20 +/* 4 ought to be enough for anybody */ +#define CLK_DUMMY_DIV_WIDTH 4 +#define CLK_DUMMY_DIV_FLAGS (CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ROUND_CLO= SEST) + +struct clk_dummy_div { + struct clk_hw hw; + unsigned int div; +}; + +static unsigned long clk_dummy_div_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_dummy_div *div =3D container_of(hw, struct clk_dummy_div, hw); + + return divider_recalc_rate(hw, parent_rate, div->div, NULL, + CLK_DUMMY_DIV_FLAGS, CLK_DUMMY_DIV_WIDTH); +} + +static int clk_dummy_div_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + if (!(clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) && req->best_parent_rat= e < req->rate) + return -EINVAL; + + return divider_determine_rate(hw, req, NULL, CLK_DUMMY_DIV_WIDTH, CLK_DUM= MY_DIV_FLAGS); +} + +static int clk_dummy_div_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_dummy_div *div =3D container_of(hw, struct clk_dummy_div, hw); + + div->div =3D divider_get_val(rate, parent_rate, NULL, CLK_DUMMY_DIV_WIDTH, + CLK_DUMMY_DIV_FLAGS); + + return 0; +} + +static const struct clk_ops clk_dummy_div_ops =3D { + .recalc_rate =3D clk_dummy_div_recalc_rate, + .determine_rate =3D clk_dummy_div_determine_rate, + .set_rate =3D clk_dummy_div_set_rate, +}; + struct clk_multiple_parent_ctx { struct clk_dummy_context parents_ctx[2]; struct clk_hw hw; --=20 2.53.0