From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 399A6C433E1 for ; Tue, 26 May 2020 08:24:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D3D02070A for ; Tue, 26 May 2020 08:24:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="tR54phAv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731485AbgEZIYp (ORCPT ); Tue, 26 May 2020 04:24:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46424 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727879AbgEZIYo (ORCPT ); Tue, 26 May 2020 04:24:44 -0400 Received: from mail-wm1-x344.google.com (mail-wm1-x344.google.com [IPv6:2a00:1450:4864:20::344]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7BBF5C08C5C1 for ; Tue, 26 May 2020 01:24:43 -0700 (PDT) Received: by mail-wm1-x344.google.com with SMTP id u188so2359988wmu.1 for ; Tue, 26 May 2020 01:24:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to; bh=LgltQhjcYnkoGoTgu09kfY7YAa0ELaS/ueJqPNen18o=; b=tR54phAvEvyyLoWxP1++txz7eCykGm2adySPXVjv9fQl2s+E9wYa1KGC3XHFMPRBqH rCQQmaG6Qnd03Qu+92ceNmQMcsYrSmMx5nb8k6wvg3AsElybp5FQpJ1gwo6u9+v3hOxZ qEoV5Co5u6jN1uwJswZflTJeZs2n/pBaIU1k6AHzP2U3tRtyYDdyuLmp49zDetLCj39y CW3upp1HBRi/LbzjBLOtJNwjrrIud5Trmfa4+mcNCiqWWZmad1sMxjPzB+24wBkpZHT5 da4A/eHxq62YY7DXBUx/6bVTy9YhLWEGz/o+EHJ0ON3cOCYyxVW/UUP57Twgj/ox4dmj DOiw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to; bh=LgltQhjcYnkoGoTgu09kfY7YAa0ELaS/ueJqPNen18o=; b=ocmmWVbkJCDXpx0Vm4Jz6j/9PxXCjlx/AraZTPC5AAAtEbPr6PcCvnGIVsXR/5tsgA D6jC6v7F26uTvqR9GK6/Urr2VwNehv9LaU/6Eg+r/4mKoqgSDCLTjFgLbQfwhsup2lWM aoGyEV6fIk5zdWcYYzZdWARZIPbGffI3YxIob84JO8E1LpWVeQfCpagzvLcJAEiklb0Q sls9OfHPxg/YUTLyCs9NvP87uuYRRqF7ByCBJvziBdI01VrDYUmqkZppe3ArHh8DDvY6 5Gj5kCG336G59wdmEtfo0cZlS2d1nTDbEWA0KFD+6GHzrIJG5q6MHXm04R72AWebX4Kz UOzg== X-Gm-Message-State: AOAM5317rKPDh/ErHh57msFArh8RpnxunIeHYrL2nAk6cF8+kjhuOvOY BYNjoKY3QOIo8D+AaniRhC09RQ== X-Google-Smtp-Source: ABdhPJwU3vDP1pmQms3HlCvAD8FpWYZXgN7hjUiCROFu1XYPc5ZuF2/JH4ntEbGZVDgFEOg01aXO7A== X-Received: by 2002:a1c:f202:: with SMTP id s2mr289549wmc.98.1590481482125; Tue, 26 May 2020 01:24:42 -0700 (PDT) Received: from dell ([95.149.164.102]) by smtp.gmail.com with ESMTPSA id z11sm15962877wrw.67.2020.05.26.01.24.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 May 2020 01:24:41 -0700 (PDT) Date: Tue, 26 May 2020 09:24:40 +0100 From: Lee Jones To: Dmitry Osipenko Cc: Tony Lindgren , Thierry Reding , Jonathan Hunter , =?utf-8?B?TWljaGHFgiBNaXJvc8WCYXc=?= , Zack Pearsall , linux-tegra@vger.kernel.org, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] mfd: tps65910: Correct power-off programming sequence Message-ID: <20200526082440.GI3628@dell> References: <20200524192643.18207-1-digetx@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200524192643.18207-1-digetx@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 24 May 2020, Dmitry Osipenko wrote: > This patch fixes system shutdown on a devices that use TPS65910 as a > system's power controller. In accordance to the TPS65910 datasheet, the > PMIC's state-machine transitions into the OFF state only when DEV_OFF > bit of DEVCTRL_REG is set. The ON / SLEEP states also should be cleared, > otherwise PMIC won't get into a proper state on shutdown. Devices like > Nexus 7 tablet and Ouya game console are now shutting down properly. > > Tested-by: Zack Pearsall > Signed-off-by: Dmitry Osipenko > --- > > Changelog: > > v2: - Now using a single tps65910_reg_update_bits() instead of set+clear. > Thanks to Michał Mirosław for the suggestion. Michał should review. > drivers/mfd/tps65910.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c > index 11959021b50a..3f4483dec871 100644 > --- a/drivers/mfd/tps65910.c > +++ b/drivers/mfd/tps65910.c > @@ -440,8 +440,13 @@ static void tps65910_power_off(void) > DEVCTRL_PWR_OFF_MASK) < 0) > return; > > - tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, > - DEVCTRL_DEV_ON_MASK); > + if (tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, > + DEVCTRL_DEV_SLP_MASK) < 0) > + return; > + > + tps65910_reg_update_bits(tps65910, TPS65910_DEVCTRL, > + DEVCTRL_DEV_OFF_MASK | DEVCTRL_DEV_ON_MASK, > + DEVCTRL_DEV_OFF_MASK); > } > > static int tps65910_i2c_probe(struct i2c_client *i2c, -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog