From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 8109C171E70; Wed, 16 Oct 2024 06:31:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729060291; cv=none; b=lRAFE9C+3Qx9CbeszLG9v+Ynh3v8Y4MT/DmUIe2ph+pCAe5Oye6YTSXKbaaGLXGKM47t6pnAov/1pF9YbVQqW8vXiVXmD/yXsYSKc+AYOiQeaFkj2ub7dus9vjMjbmtANXOh9pPzpsUGz1441Tdb+eDcAWPxmROvv5o6z5jaqvI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729060291; c=relaxed/simple; bh=fB4hgiqBPWxXQEJ37Sc4qFgrj3kMj4QM5bPBRPxb+Mk=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=i/PMuZQVk+vi17zJ46liF8nbg+FlWBCgh4LhyAxHLfCbdp6eGvmwJ7xOCfUESab0n0x7gesPCafDj1TTe/i/+Y1Tgl9L6pHOUB+sM+W0bovV+bYUjGSg5S3mb7t25GnoU/wkK9JSSL2fcB1GCOuVKUY6YIYJsyNPLlhiXlK9nDs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=t89hxsWK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="t89hxsWK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 11E55C4CECE; Wed, 16 Oct 2024 06:31:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729060290; bh=fB4hgiqBPWxXQEJ37Sc4qFgrj3kMj4QM5bPBRPxb+Mk=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=t89hxsWKmfp/Kve07KGTTGSaSsoypjM+t7oBQaOLiEO4Z8dfsQ3B6BB+Lm8n0uh2U 0KfV/QQ4A4X3Cf27wvd4bJUIyX82ValyaDrtICNOKCNXU5Vg7TIoL+XXzGiLMGx4Dk hPFYDeb0RcKYIkgBvMEo0JEus2u/RJvqgmudzF78qiv/Z2Nu+mGwoHSgGeukx94Mz6 LKt2BUMqXr/b3134GxkVFeAfmD5zp//4FC6yB2j77OP8GbRlLAAnlVGphTP5B3FB5S dTAwoW9TQMiEjOQ5+NDSrb4gLVBkI2Fv8hhFI0k9J6zeE2WHGurfiwDC7BGO8ctGfz TJxFcyemolsag== Message-ID: <54fd467b-8077-454f-ae6c-14bb782cbe3a@kernel.org> Date: Wed, 16 Oct 2024 08:31:23 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 2/3] dt-bindings: mailbox: Add thead,th1520-mailbox bindings To: Samuel Holland , Michal Wilczynski Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Krzysztof Kozlowski , drew@pdp7.com, guoren@kernel.org, wefu@redhat.com, jassisinghbrar@gmail.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, m.szyprowski@samsung.com References: <20241014123314.1231517-1-m.wilczynski@samsung.com> <20241014123314.1231517-3-m.wilczynski@samsung.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 16/10/2024 01:14, Samuel Holland wrote: >> + reg-names: >> + items: >> + - const: local >> + - const: remote-icu0 >> + - const: remote-icu1 >> + - const: remote-icu2 >> + >> + interrupts: >> + maxItems: 1 >> + >> + '#mbox-cells': >> + const: 2 >> + description: | >> + Specifies the number of cells needed to encode the mailbox specifier. >> + The mailbox specifier consists of two cells: >> + - Destination CPU ID. >> + - Type, which can be one of the following: >> + - 0: >> + - TX & RX channels share the same channel. >> + - Equipped with 7 info registers to facilitate data sharing. >> + - Supports IRQ for signaling. >> + - 1: >> + - TX & RX operate as doorbell channels. >> + - Does not have dedicated info registers. >> + - Lacks ACK support. > > It appears that these types are not describing hardware, but the protocol used > by the Linux driver to glue two unidirectional hardware channels together to > make a virtual bidirectional channel. This is really the responsibility of the > mailbox client to know what protocol it needs, not the devicetree. > Hm, where is the DTS with consumers of this mailbox provider? Best regards, Krzysztof