From patchwork Tue Jul 19 19:14:42 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Warren X-Patchwork-Id: 9238179 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5F57D60574 for ; Tue, 19 Jul 2016 19:16:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4BCDE20246 for ; Tue, 19 Jul 2016 19:16:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 40A4B26E81; Tue, 19 Jul 2016 19:16:34 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CDEE020246 for ; Tue, 19 Jul 2016 19:16:33 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bPaUE-0006F8-BD; Tue, 19 Jul 2016 19:15:22 +0000 Received: from avon.wwwdotorg.org ([70.85.31.133]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bPaUA-0004oT-RK for linux-arm-kernel@lists.infradead.org; Tue, 19 Jul 2016 19:15:20 +0000 Received: from swarren-lx1.nvidia.com (thunderhill.nvidia.com [216.228.112.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by avon.wwwdotorg.org (Postfix) with ESMTPSA id 779481C0485; Tue, 19 Jul 2016 13:15:00 -0600 (MDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.99 at avon.wwwdotorg.org From: Stephen Warren To: Thierry Reding , Joseph Lo , Rob Herring Subject: [PATCH 3/3] dt-bindings: add Tegra186 BPMP I2C binding Date: Tue, 19 Jul 2016 13:14:42 -0600 Message-Id: <20160719191442.15439-3-swarren@wwwdotorg.org> X-Mailer: git-send-email 2.9.2 In-Reply-To: <20160719191442.15439-1-swarren@wwwdotorg.org> References: <20160719191442.15439-1-swarren@wwwdotorg.org> X-NVConfidentiality: public X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160719_121519_027182_DEA92CA2 X-CRM114-Status: GOOD ( 11.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Stephen Warren , pdeschrijver@nvidia.com, sivaramn@nvidia.com, MLongnecker@nvidia.com, linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Stephen Warren In Tegra186, the BPMP (Boot and Power Management Processor) owns certain HW devices, such as the I2C controller for the power management I2C bus. Software running on other CPUs must perform IPC to the BPMP in order to execute transactions on that I2C bus. This binding describes an I2C bus that is accessed in such a fashion. Signed-off-by: Stephen Warren Acked-by: Rob Herring Acked-by: Jon Hunter --- .../bindings/i2c/nvidia,tegra186-bpmp-i2c.txt | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/nvidia,tegra186-bpmp-i2c.txt diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra186-bpmp-i2c.txt b/Documentation/devicetree/bindings/i2c/nvidia,tegra186-bpmp-i2c.txt new file mode 100644 index 000000000000..fecb549bc250 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra186-bpmp-i2c.txt @@ -0,0 +1,42 @@ +NVIDIA Tegra186 BPMP I2C controller + +In Tegra186, the BPMP (Boot and Power Management Processor) owns certain HW +devices, such as the I2C controller for the power management I2C bus. Software +running on other CPUs must perform IPC to the BPMP in order to execute +transactions on that I2C bus. This binding describes an I2C bus that is +accessed in such a fashion. + +The BPMP I2C node must be located directly inside the main BPMP node. See +../firmware/nvidia,tegra186-bpmp.txt for details of the BPMP binding. + +This node represents an I2C controller. See ../i2c/i2c.txt for details of the +core I2C binding. + +Required properties: +- compatible: + Array of strings. + One of: + - "nvidia,tegra186-bpmp-i2c". +- #address-cells: Address cells for I2C device address. + Single-cell integer. + Must be <1>. +- #size-cells: + Single-cell integer. + Must be <0>. +- nvidia,bpmp-bus-id: + Single-cell integer. + Indicates the I2C bus number this DT node represent, as defined by the + BPMP firmware. + +Example: + +/ bpmp { + ... + + bpmp-i2c { + compatible = "nvidia,tegra186-bpmp-i2c"; + #address-cells = <1>; + #size-cells = <0>; + nvidia,bpmp-bus-id = <5>; + }; +};