From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELtqdaWrF/Knnwl+qMCE0cRv0JgG6I1J+7r6h0Vootg1MoOw+mGJu5M68hkOEAeIwjuisgJd ARC-Seal: i=1; a=rsa-sha256; t=1520509699; cv=none; d=google.com; s=arc-20160816; b=qz9f3Drh/QVE0wuwpiqhUCQbReWh+4ZenHa18eZgpD8UuCfpAVQcGnOFC5tspYgFbK VLNskf8nrN8Y/vy5rj9UEPU1YU2tpv9yc4xP1Td2NGXu1Co9rw1AEyW/uR13rFDlvg9n NuCvbpgXb3VJbEEjcgmTt9Cib71GGtqM91wC78WCccmMBd9sLInvFlHXpwSri1iCgxFU t4dJBrPQVTcDwB5Xz6P35zIC/Nz3DEkCsXhASdHfFoG8x6wb+80EURhxpno2RumN2sR5 y4MeHSEuzJhOgPwxbl5YPgznxjCyD0XaOrfsdvR1FTpIj3fdOVZYvjbi3oqNAC07bFcu ZBxQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:organization:from:references:to:subject :cc:arc-authentication-results; bh=l2hwGSdUA3i646QWPoll+ILFofsPmzlFamWWM6jiTWk=; b=McAn4OTpddxBQpx/1hMXfAfoq+ZiEKoWjUouHPmIxvZ9OLhZRPT+dSWGnfMhIMTnCl 0qeoBlUNrSp5wAXzPs82P9BfzW3Wz7CNBbggWXyj98xSDFMR+no+Swhfb4ssCrhvZWJB RKJIlDEeoB2MRUq1Ier5CKRhU4nRU2k3usn7Mu7i75C25ZWciEDFUMDf9XDnlNZSpEdR NuwdwePsbirSPIS0ZZy5KejYwt1kQYSB1CRxX0tynsdSmtgE10cJ0P8HkzS+hx/UitfY Gy/J/zT3wvkPneL8tkGB8JvLFXzi0cmUJvVz5ujReINbs9ECpWzgtw8l7cm6WTJMxVnH oNgQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of sudeep.holla@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=sudeep.holla@arm.com Authentication-Results: mx.google.com; spf=pass (google.com: domain of sudeep.holla@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=sudeep.holla@arm.com Cc: "gregkh@linuxfoundation.org" , "matt@codeblueprint.co.uk" , "hkallweit1@gmail.com" , "michal.simek@xilinx.com" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , Sudeep Holla , "ard.biesheuvel@linaro.org" , "mingo@kernel.org" , "keescook@chromium.org" , "dmitry.torokhov@gmail.com" , Rajan Vaja , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" Subject: Re: [PATCH v5 1/4] dt-bindings: firmware: Add bindings for ZynqMP firmware To: Jolly Shah References: <1519154467-2896-1-git-send-email-jollys@xilinx.com> <1519154467-2896-2-git-send-email-jollys@xilinx.com> <778329dd-76a7-0151-26d9-30e87e0c888d@arm.com> From: Sudeep Holla Organization: ARM Message-ID: Date: Thu, 8 Mar 2018 11:48:09 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1592948931841332945?= X-GMAIL-MSGID: =?utf-8?q?1594369978470011030?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On 07/03/18 22:25, Jolly Shah wrote: > Hi Sudeep, > [...] >>> +Examples: >>> + firmware { >>> + zynqmp_firmware: zynqmp-firmware { >>> + compatible = "xlnx,zynqmp-firmware"; >>> + method = "smc"; >>> + }; >>> + }; >>> >> >> Do you foresee using SMC/HVC for this firmware even on future platforms? >> If not, I suggest to keep the protocol part separate from the transport i.e. >> smc/hvc via ATF. It could be replaced with mailbox or some h/w mechanism in >> future ? >> > > We have PSCI and EEMI interfaces exposed to linux from ATF. PSCI is > an EEMI client. We do not have current plans to switch to mailbox as it > will require 2 communication channels to PMU as PSCI is through ATF. > OK, but I just saw some bindings that has mailbox interface, honestly it's getting too confusing with multiple series on the same thing floating and hence I requested to put it together as one series. -- Regards, Sudeep