From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762117AbbAaArQ (ORCPT ); Fri, 30 Jan 2015 19:47:16 -0500 Received: from smtp.codeaurora.org ([198.145.11.231]:54893 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753784AbbAaAqu (ORCPT ); Fri, 30 Jan 2015 19:46:50 -0500 From: Gilad Avidov To: gavidov@codeaurora.org, sdharia@codeaurora.org, mlocke@codeaurora.org, linux-arm-msm@vger.kernel.org, gregkh@linuxfoundation.org, svarbanov@mm-sol.com Cc: linux-kernel@vger.kernel.org, iivanov@mm-sol.com, galak@codeaurora.org, agross@codeaurora.org Subject: [PATCH V2 1/2] spmi: remove wakeup command before slave probe Date: Fri, 30 Jan 2015 17:46:40 -0700 Message-Id: <1422665201-25569-2-git-send-email-gavidov@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1422665201-25569-1-git-send-email-gavidov@codeaurora.org> References: <1422665201-25569-1-git-send-email-gavidov@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org According to spmi spec a slave powers up into startup state and then transitions into active state. Thus, the wakeup command is not required before calling the slave's probe. The wakeup command is only needed for slaves that are in sleep state after receiving the sleep command. This is a bug since spmi master controllers, such as spmi-pmic-arb, which have no support for wakeup command return an error on that command and thus fail before reaching a slave driver probe. Cc: galak@codeaurora.org Acked-by: Sagar Dharia Signed-off-by: Gilad Avidov --- drivers/spmi/spmi.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/spmi/spmi.c b/drivers/spmi/spmi.c index 1d92f51..9ff7454 100644 --- a/drivers/spmi/spmi.c +++ b/drivers/spmi/spmi.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. +/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -316,11 +316,6 @@ static int spmi_drv_probe(struct device *dev) struct spmi_device *sdev = to_spmi_device(dev); int err; - /* Ensure the slave is in ACTIVE state */ - err = spmi_command_wakeup(sdev); - if (err) - goto fail_wakeup; - pm_runtime_get_noresume(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); @@ -335,7 +330,6 @@ fail_probe: pm_runtime_disable(dev); pm_runtime_set_suspended(dev); pm_runtime_put_noidle(dev); -fail_wakeup: return err; } -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation