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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 46F51C43215 for ; Sat, 16 Nov 2019 16:03:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2100621823 for ; Sat, 16 Nov 2019 16:03:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573920202; bh=vm84ASlpradK3YRp36649IF0WvfGXEHeTtm8gY3B1AY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=I7Kt/kFRUItLaY+mZ3Uk0FZ9uQ+tiDfLjS9KabUltYCNxxxEpbTYTGFu0ekanRG3z vuu+pIXi0bsJAPbHXVKZozWl2YXpBvoqO/qdrq8CDz5zM98HCc1VA250S18/1FiZQk 8ASS9/e2Bgtlb/h+u2V719dAlQxyGvmvm4mlmDvw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731578AbfKPQDR (ORCPT ); Sat, 16 Nov 2019 11:03:17 -0500 Received: from mail.kernel.org ([198.145.29.99]:60936 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730061AbfKPPwE (ORCPT ); Sat, 16 Nov 2019 10:52:04 -0500 Received: from sasha-vm.mshome.net (unknown [50.234.116.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1730220B7C; Sat, 16 Nov 2019 15:52:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573919524; bh=vm84ASlpradK3YRp36649IF0WvfGXEHeTtm8gY3B1AY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=l3Pec1SGmiaWs8IdNfu0L9pA+n2FUkGCz6HQAJjmK3+FWfdTYtDMfmA8qFqTqKWbp CKTpuamxdIzRVpQZlMU0vBXrOqwfkdtveyKUEkXX+TYkZMFTk739/O+1KDU9moWUa2 ahwOh+jPG6uZc73hPAmNL3g376pKEkWzk28EhOv4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Fabio Estevam , Chris Healy , Lee Jones , Sasha Levin Subject: [PATCH AUTOSEL 4.9 46/99] mfd: mc13xxx-core: Fix PMIC shutdown when reading ADC values Date: Sat, 16 Nov 2019 10:50:09 -0500 Message-Id: <20191116155103.10971-46-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191116155103.10971-1-sashal@kernel.org> References: <20191116155103.10971-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Fabio Estevam [ Upstream commit 55143439b7b501882bea9d95a54adfe00ffc79a3 ] When trying to read any MC13892 ADC channel on a imx51-babbage board: The MC13892 PMIC shutdowns completely. After debugging this issue and comparing the MC13892 and MC13783 initializations done in the vendor kernel, it was noticed that the CHRGRAWDIV bit of the ADC0 register was not being set. This bit is set by default after power on, but the driver was clearing it. After setting this bit it is possible to read the ADC values correctly. Signed-off-by: Fabio Estevam Tested-by: Chris Healy Signed-off-by: Lee Jones Signed-off-by: Sasha Levin --- drivers/mfd/mc13xxx-core.c | 3 ++- include/linux/mfd/mc13xxx.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c index 6c16f170529f5..75d52034f89da 100644 --- a/drivers/mfd/mc13xxx-core.c +++ b/drivers/mfd/mc13xxx-core.c @@ -278,7 +278,8 @@ int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode, if (ret) goto out; - adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2; + adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2 | + MC13XXX_ADC0_CHRGRAWDIV; adc1 = MC13XXX_ADC1_ADEN | MC13XXX_ADC1_ADTRIGIGN | MC13XXX_ADC1_ASC; if (channel > 7) diff --git a/include/linux/mfd/mc13xxx.h b/include/linux/mfd/mc13xxx.h index 638222e43e489..93011c61aafd2 100644 --- a/include/linux/mfd/mc13xxx.h +++ b/include/linux/mfd/mc13xxx.h @@ -247,6 +247,7 @@ struct mc13xxx_platform_data { #define MC13XXX_ADC0_TSMOD0 (1 << 12) #define MC13XXX_ADC0_TSMOD1 (1 << 13) #define MC13XXX_ADC0_TSMOD2 (1 << 14) +#define MC13XXX_ADC0_CHRGRAWDIV (1 << 15) #define MC13XXX_ADC0_ADINC1 (1 << 16) #define MC13XXX_ADC0_ADINC2 (1 << 17) -- 2.20.1