From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932978AbbCXRDn (ORCPT ); Tue, 24 Mar 2015 13:03:43 -0400 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:48827 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932956AbbCXRDh (ORCPT ); Tue, 24 Mar 2015 13:03:37 -0400 From: Charles Keepax To: lee.jones@linaro.org Cc: sameo@linux.intel.com, broonie@kernel.org, patches@opensource.wolfsonmicro.com, linux-kernel@vger.kernel.org Subject: [PATCH v2 5/5] mfd: wm5110: Add delay before releasing reset line Date: Tue, 24 Mar 2015 16:59:56 +0000 Message-Id: <1427216396-15517-6-git-send-email-ckeepax@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1427216396-15517-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> References: <1427216396-15517-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On the wm5110 it is important the reset line is held for slightly longer to ensure the device starts up well. This patch adds a 5mS delay for this. Signed-off-by: Charles Keepax --- drivers/mfd/arizona-core.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-) diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c index ba48e17..54da62d 100644 --- a/drivers/mfd/arizona-core.c +++ b/drivers/mfd/arizona-core.c @@ -276,6 +276,15 @@ static inline void arizona_enable_reset(struct arizona *arizona) static void arizona_disable_reset(struct arizona *arizona) { if (arizona->pdata.reset) { + switch (arizona->type) { + case WM5110: + case WM8280: + msleep(5); + break; + default: + break; + } + gpio_set_value_cansleep(arizona->pdata.reset, 1); msleep(1); } -- 1.7.2.5