Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757888AbcK2Owb (ORCPT ); Tue, 29 Nov 2016 09:52:31 -0500 Received: from mail.kernel.org ([198.145.29.136]:45570 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757357AbcK2OwE (ORCPT ); Tue, 29 Nov 2016 09:52:04 -0500 MIME-Version: 1.0 In-Reply-To: References: <1479434109-8745-1-git-send-email-matt@ranostay.consulting> <20161128141513.agnkyz6ronigbukn@rob-hp-laptop> From: Rob Herring Date: Tue, 29 Nov 2016 08:51:22 -0600 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH] mmc: pwrseq: add support for Marvell SD8787 chip To: Ulf Hansson Cc: Matt Ranostay , "linux-wireless@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-mmc@vger.kernel.org" , Tony Lindgren , Mark Rutland , Srinivas Kandagatla Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1924 Lines: 42 On Mon, Nov 28, 2016 at 9:54 AM, Ulf Hansson wrote: > [...] > >>> + >>> +Example: >>> + >>> + wifi_pwrseq: wifi_pwrseq { >>> + compatible = "mmc-pwrseq-sd8787"; >>> + pwrdn-gpio = <&twl_gpio 0 GPIO_ACTIVE_LOW>; >>> + reset-gpio = <&twl_gpio 1 GPIO_ACTIVE_LOW>; >>> + } >>> diff --git a/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt b/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt >>> index c421aba0a5bc..08fd65d35725 100644 >>> --- a/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt >>> +++ b/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt >>> @@ -32,6 +32,9 @@ Optional properties: >>> so that the wifi chip can wakeup host platform under certain condition. >>> during system resume, the irq will be disabled to make sure >>> unnecessary interrupt is not received. >>> + - vmmc-supply: a phandle of a regulator, supplying VCC to the card >> >> This is why pwrseq is wrong. You have some properties in the card node >> and some in pwrseq node. Everything should be in the card node. > > Put "all" in the card node, just doesn't work for MMC. Particular in > cases when we have removable cards, as then it would be wrong to have > a card node. When is there a problem with removable cards? The connector is standard and everything needed (CD, VMMC, VDDIO, etc.) is defined in the host controller node. If that isn't sufficient, then we should start defining a connector node. > The mmc pwrseq DT bindings just follows the legacy approach for MMC > and that's why the pwrseq handle is at the controller node. Yes, would > could have done it differently, but this is the case now, so we will > have to accept that. We're stuck with supporting the existing cases. That doesn't mean we're stuck with the same thing for new cases. Rob