From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932775Ab2HGWbB (ORCPT ); Tue, 7 Aug 2012 18:31:01 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:54583 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932696Ab2HGWap (ORCPT ); Tue, 7 Aug 2012 18:30:45 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg KH , torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Vinit Shenoy , Virupax Sadashivpetimath , Linus Walleij Subject: [ 072/122] spi/pl022: disable port when unused Date: Tue, 7 Aug 2012 15:26:00 -0700 Message-Id: <20120807221955.096915185@linuxfoundation.org> X-Mailer: git-send-email 1.7.10.1.362.g242cab3 In-Reply-To: <20120807221948.220495155@linuxfoundation.org> References: <20120807221948.220495155@linuxfoundation.org> User-Agent: quilt/0.60-20.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Greg KH 3.5-stable review patch. If anyone has any objections, please let me know. ------------------ From: Virupax Sadashivpetimath commit fd316941cfee1fbd12746afea83720fb7823888a upstream. Commit ffbbdd21329f3e15eeca6df2d4bc11c04d9d91c0 "spi: create a message queueing infrastructure" Accidentally deleted the logic to disable the port when unused leading to higher power consumption. Fix this up. Cc: Vinit Shenoy Signed-off-by: Virupax Sadashivpetimath Signed-off-by: Linus Walleij Signed-off-by: Greg Kroah-Hartman --- drivers/spi/spi-pl022.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/spi/spi-pl022.c +++ b/drivers/spi/spi-pl022.c @@ -489,6 +489,11 @@ static void giveback(struct pl022 *pl022 pl022->cur_transfer = NULL; pl022->cur_chip = NULL; spi_finalize_current_message(pl022->master); + + /* disable the SPI/SSP operation */ + writew((readw(SSP_CR1(pl022->virtbase)) & + (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); + } /**