From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from mail-oi1-f170.google.com (mail-oi1-f170.google.com [209.85.167.170]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35881A3; Wed, 29 Nov 2023 06:58:48 -0800 (PST) Received: by mail-oi1-f170.google.com with SMTP id 5614622812f47-3b843fea0dfso3900458b6e.3; Wed, 29 Nov 2023 06:58:48 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701269927; x=1701874727; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Om8QH0PgH6JybOzR4agW39ICVCA3hclLDw5NauxCXtE=; b=E8fa01i4+bCx9eNPeg/8VKnLnO4NlrdbNy4FqndnldSJ69C5ZbGiEk4RoZ3SJvVQ5D 9y3FDnpYHr+oPaYZ+O9B5uZk0B/mlprV92zZ+RSDWok8wLcwi5xQFAsgcWXfbYSlpoKG FxczfgNKBWEqorjRCrXSCaRl6ppYRhWcQHIs4Uq/LRatZYFV3Vu8dR19rKES9NpBmWMK 3vaJQ4UUV4fvQDBudoOxEy5Ph+1fxCoda70LXu0u/6MBh7z8JP1GTo0DvA/J5f1vswfG KGbPuDqMkx63QlZWgrfcD6weFC3/S9p/OG59HqfzExYU3cVDbJeKg3O6bPwMdcDYDGtr Eawg== X-Gm-Message-State: AOJu0Yyi7VczYE8oAVKDnrlR74j0HhhpGtpoIupgfa0AYak7x+LKq9Gn 7POZG+FAHTJzAFOwwBFZaQ== X-Google-Smtp-Source: AGHT+IFaDKlAMO0TTBe2DgTuEmwhSM1mq/2uExerm3hYow5K6ag6Zf/td6nyVFVGAKaudl9+l3aL7g== X-Received: by 2002:a05:6808:34c:b0:3a7:1e86:e83f with SMTP id j12-20020a056808034c00b003a71e86e83fmr19018621oie.51.1701269927374; Wed, 29 Nov 2023 06:58:47 -0800 (PST) Received: from herring.priv (66-90-144-107.dyn.grandenetworks.net. [66.90.144.107]) by smtp.gmail.com with ESMTPSA id m23-20020a056808025700b003b29c2f50f0sm2248202oie.18.2023.11.29.06.58.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Nov 2023 06:58:46 -0800 (PST) Received: (nullmailer pid 2464542 invoked by uid 1000); Wed, 29 Nov 2023 14:58:45 -0000 Date: Wed, 29 Nov 2023 08:58:45 -0600 From: Rob Herring To: Stephan Gerhold Cc: Greg Kroah-Hartman , Andy Gross , Bjorn Andersson , Konrad Dybcio , Jiri Slaby , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] dt-bindings: serial: qcom,msm-uartdm: Vote for shared resources Message-ID: <20231129145845.GA2459716-robh@kernel.org> References: <20231128-serial-msm-dvfs-v1-0-4f290d20a4be@kernkonzept.com> <20231128-serial-msm-dvfs-v1-1-4f290d20a4be@kernkonzept.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231128-serial-msm-dvfs-v1-1-4f290d20a4be@kernkonzept.com> On Tue, Nov 28, 2023 at 10:43:32AM +0100, Stephan Gerhold wrote: > Document power-domains, operating-points-v2 and interconnects to allow > making performance state votes for certain clock frequencies of the UART > DM controller. The interconnect path to DRAM is needed when UART DM is > used together with a DMA engine. > > Voting for these shared resources is necessary to guarantee performance > with power management enabled. Otherwise these resources might run at > minimal performance state which is not sufficient for certain UART > baud rates. I find the subject a bit strange because voting is a QCom term/concept and somewhat outside the scope of the binding. The justification is really just that the h/w has these resources. In any case, Reviewed-by: Rob Herring > Signed-off-by: Stephan Gerhold > --- > .../devicetree/bindings/serial/qcom,msm-uartdm.yaml | 13 +++++++++++++ > 1 file changed, 13 insertions(+)