Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754943AbaJXGzj (ORCPT ); Fri, 24 Oct 2014 02:55:39 -0400 Received: from eusmtp01.atmel.com ([212.144.249.242]:22815 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752127AbaJXGzi (ORCPT ); Fri, 24 Oct 2014 02:55:38 -0400 From: Wenyou Yang To: , CC: , , , , , Subject: [PATCH v3 3/3] i2c/at91: adopt pinctrl support Date: Fri, 24 Oct 2014 14:50:17 +0800 Message-ID: <1414133417-11530-4-git-send-email-wenyou.yang@atmel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1414133417-11530-1-git-send-email-wenyou.yang@atmel.com> References: <1414133417-11530-1-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 i2c at91 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 transfer - "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/i2c/busses/i2c-at91.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index 6a84a2a..290caf1 100644 --- a/drivers/i2c/busses/i2c-at91.c +++ b/drivers/i2c/busses/i2c-at91.c @@ -32,6 +32,7 @@ #include #include #include +#include #define DEFAULT_TWI_CLK_HZ 100000 /* max 400 Kbits/s */ #define AT91_I2C_TIMEOUT msecs_to_jiffies(100) /* transfer timeout */ @@ -747,6 +748,8 @@ static int at91_twi_probe(struct platform_device *pdev) u32 phy_addr; u32 bus_clk_rate; + pinctrl_pm_select_default_state(&pdev->dev); + dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); if (!dev) return -ENOMEM; @@ -851,6 +854,8 @@ static int at91_twi_runtime_suspend(struct device *dev) clk_disable_unprepare(twi_dev->clk); + pinctrl_pm_select_sleep_state(dev); + return 0; } @@ -858,6 +863,8 @@ static int at91_twi_runtime_resume(struct device *dev) { struct at91_twi_dev *twi_dev = dev_get_drvdata(dev); + pinctrl_pm_select_default_state(dev); + return clk_prepare_enable(twi_dev->clk); } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/