From patchwork Sun Aug 7 18:57:49 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 656481 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3s6qdM3Fhzz9t0F for ; Mon, 8 Aug 2016 05:01:11 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751888AbcHGS7e (ORCPT ); Sun, 7 Aug 2016 14:59:34 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59512 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751734AbcHGS57 (ORCPT ); Sun, 7 Aug 2016 14:57:59 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AB82FC04D2EF; Sun, 7 Aug 2016 18:57:58 +0000 (UTC) Received: from shalem.localdomain.com (vpn1-7-85.ams2.redhat.com [10.36.7.85]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u77IvpOX027957; Sun, 7 Aug 2016 14:57:55 -0400 From: Hans de Goede To: Ulf Hansson , Rob Herring Cc: Chen-Yu Tsai , Maxime Ripard , linux-mmc@vger.kernel.org, Icenowy Zheng , linux-arm-kernel@lists.infradead.org, devicetree , Hans de Goede Subject: [PATCH 2/2] dt: bindings: Add binding for ESP8089 wifi chips Date: Sun, 7 Aug 2016 20:57:49 +0200 Message-Id: <1470596269-20572-2-git-send-email-hdegoede@redhat.com> In-Reply-To: <1470596269-20572-1-git-send-email-hdegoede@redhat.com> References: <1470596269-20572-1-git-send-email-hdegoede@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Sun, 07 Aug 2016 18:57:58 +0000 (UTC) Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The ESP8089 chips can mostly be enumerated via their sdio interface, but they are clocked by an external crystal which may differ from one board to the other. This commit adds a binding for the sdio child node for these chips, allowing to specify the external crystal type (for now, this binding could be be extended with e.g. OOB irq support later). The Android driver for this chip uses a text file with key,value pairs which gets loaded as firmware to pass this info to the firmware. The "esp,crystal_26M_en" name is chosen to match the crystal_26M_en key-name in that text file. Note that at this point there only is an out of tree driver for this hardware, there is no clear timeline / path for merging this. Still I believe it would be good to specify the binding for this in tree now, so that any future migration to an in tree driver will not cause compatiblity issues. Cc: Icenowy Zheng Signed-off-by: Hans de Goede --- .../bindings/net/wireless/esp,esp8089.txt | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/wireless/esp,esp8089.txt diff --git a/Documentation/devicetree/bindings/net/wireless/esp,esp8089.txt b/Documentation/devicetree/bindings/net/wireless/esp,esp8089.txt new file mode 100644 index 0000000..898a149 --- /dev/null +++ b/Documentation/devicetree/bindings/net/wireless/esp,esp8089.txt @@ -0,0 +1,31 @@ +Espressif ESP8089 wireless SDIO devices + +This node provides properties for controlling the ESP8089 wireless device. +The node is expected to be specified as a child node to the SDIO controller +that connects the device to the system. + +Required properties: + + - compatible : Should be "esp,esp8089". + +Optional properties: + - esp,crystal_26M_en: Integer value for the crystal_26M_en firmware parameter + +Example: + +&mmc1 { + #address-cells = <1>; + #size-cells = <0>; + + vmmc-supply = <®_dldo1>; + mmc-pwrseq = <&wifi_pwrseq>; + bus-width = <4>; + non-removable; + status = "okay"; + + esp8089: sdio_wifi@1 { + compatible = "esp,esp8089"; + reg = <1>; + esp,crystal_26M_en = <2>; + }; +};