From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754116AbbEKNIF (ORCPT ); Mon, 11 May 2015 09:08:05 -0400 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:35015 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753106AbbEKNHh (ORCPT ); Mon, 11 May 2015 09:07:37 -0400 From: Charles Keepax To: lee.jones@linaro.org Cc: broonie@kernel.org, lgirdwood@gmail.com, sameo@linux.intel.com, patches@opensource.wolfsonmicro.com, linux-kernel@vger.kernel.org Subject: [RESEND PATCH v3 10/10] mfd: wm5110: Add delay before releasing reset line Date: Mon, 11 May 2015 13:58:10 +0100 Message-Id: <1431349090-24173-11-git-send-email-ckeepax@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1431349090-24173-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> References: <1431349090-24173-1-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 Acked-by: Lee Jones --- drivers/mfd/arizona-core.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c index f1ff68a..93e4d94 100644 --- a/drivers/mfd/arizona-core.c +++ b/drivers/mfd/arizona-core.c @@ -259,6 +259,16 @@ 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: + /* Meet requirements for minimum reset duration */ + msleep(5); + break; + default: + break; + } + gpio_set_value_cansleep(arizona->pdata.reset, 1); msleep(1); } -- 1.7.2.5