From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751801Ab2KTFtU (ORCPT ); Tue, 20 Nov 2012 00:49:20 -0500 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:41961 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750872Ab2KTFtT (ORCPT ); Tue, 20 Nov 2012 00:49:19 -0500 From: Mark Brown To: Samuel Ortiz Cc: linux-kernel@vger.kernel.org, patches@opensource.wolfsonmicro.com, Charles Keepax , Mark Brown Subject: [PATCH] mfd: arizona: Sync regcache after reset Date: Tue, 20 Nov 2012 14:49:10 +0900 Message-Id: <1353390550-28077-1-git-send-email-broonie@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1353386781-10468-5-git-send-email-broonie@opensource.wolfsonmicro.com> References: <1353386781-10468-5-git-send-email-broonie@opensource.wolfsonmicro.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Charles Keepax In the absence of a physical reset line the chip is reset by writing the first register, which is done after the register patch has been applied. This patch synchronises the register cache after the reset to preserve any register changes that had been applied. Signed-off-by: Charles Keepax Signed-off-by: Mark Brown --- drivers/mfd/arizona-core.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c index 202bf55..f4f9bf8 100644 --- a/drivers/mfd/arizona-core.c +++ b/drivers/mfd/arizona-core.c @@ -415,11 +415,19 @@ int __devinit arizona_dev_init(struct arizona *arizona) /* If we have a /RESET GPIO we'll already be reset */ if (!arizona->pdata.reset) { + regcache_mark_dirty(arizona->regmap); + ret = regmap_write(arizona->regmap, ARIZONA_SOFTWARE_RESET, 0); if (ret != 0) { dev_err(dev, "Failed to reset device: %d\n", ret); goto err_reset; } + + ret = regcache_sync(arizona->regmap); + if (ret != 0) { + dev_err(dev, "Failed to sync device: %d\n", ret); + goto err_reset; + } } ret = arizona_wait_for_boot(arizona); -- 1.7.10.4