From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Steffen Trumtrar , Lucas Stach , Mark Brown Subject: [PATCH 3.16 029/127] regulator: ltc3589: fix broken voltage transitions Date: Tue, 28 Oct 2014 11:34:24 +0800 Message-Id: <20141028033422.194890962@linuxfoundation.org> In-Reply-To: <20141028033420.925922046@linuxfoundation.org> References: <20141028033420.925922046@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Steffen Trumtrar commit c5bb725ac2d1a13e9e766bf9a16bac986ade17cd upstream. VCCR is used as a trigger to start voltage transitions, so we need to mark it volatile in order to make sure it gets written to hardware every time we set a new voltage. Fixes regulator voltage being stuck at the first voltage set after driver load. [lst: reworded commit message] Signed-off-by: Steffen Trumtrar Signed-off-by: Lucas Stach Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- drivers/regulator/ltc3589.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/regulator/ltc3589.c +++ b/drivers/regulator/ltc3589.c @@ -372,6 +372,7 @@ static bool ltc3589_volatile_reg(struct switch (reg) { case LTC3589_IRQSTAT: case LTC3589_PGSTAT: + case LTC3589_VCCR: return true; } return false;