From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756813AbaCECIb (ORCPT ); Tue, 4 Mar 2014 21:08:31 -0500 Received: from nasmtp02.atmel.com ([204.2.163.16]:44455 "EHLO SJOEDG01.corp.atmel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755628AbaCECI3 (ORCPT ); Tue, 4 Mar 2014 21:08:29 -0500 X-Greylist: delayed 308 seconds by postgrey-1.27 at vger.kernel.org; Tue, 04 Mar 2014 21:08:29 EST From: Wenyou Yang To: , , , , , , , , CC: , , , , Subject: [PATCH 1/2] spi: atmel: adopt pinctrl support Date: Wed, 5 Mar 2014 09:58:49 +0800 Message-ID: <1393984730-14828-2-git-send-email-wenyou.yang@atmel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1393984730-14828-1-git-send-email-wenyou.yang@atmel.com> References: <1393984730-14828-1-git-send-email-wenyou.yang@atmel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Amend the spi atmel pin controller to optionally take a pin control handle and set the state of the pins to: - "default" on boot, resume and before performing an spitransfer - "sleep" on suspend() This should make it possible to optimize energy usage for the pins both for the suspend/resume cycle Signed-off-by: Wenyou Yang --- drivers/spi/spi-atmel.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index b0842f7..54b4436 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -26,6 +26,7 @@ #include #include +#include /* SPI register offsets */ #define SPI_CR 0x0000 @@ -1303,6 +1304,9 @@ static int atmel_spi_probe(struct platform_device *pdev) struct spi_master *master; struct atmel_spi *as; + /* Select default pin state */ + pinctrl_pm_select_default_state(&pdev->dev); + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!regs) return -ENXIO; @@ -1457,6 +1461,9 @@ static int atmel_spi_suspend(struct device *dev) struct atmel_spi *as = spi_master_get_devdata(master); clk_disable_unprepare(as->clk); + + pinctrl_pm_select_sleep_state(dev); + return 0; } @@ -1465,6 +1472,8 @@ static int atmel_spi_resume(struct device *dev) struct spi_master *master = dev_get_drvdata(dev); struct atmel_spi *as = spi_master_get_devdata(master); + pinctrl_pm_select_default_state(dev); + clk_prepare_enable(as->clk); return 0; } -- 1.7.9.5