From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anson Huang Subject: [PATCH V2 2/2] tty: serial: imx: add pinctrl sleep/default mode switch for suspend Date: Wed, 5 Sep 2018 09:24:27 +0800 Message-ID: <1536110667-23530-2-git-send-email-Anson.Huang@nxp.com> References: <1536110667-23530-1-git-send-email-Anson.Huang@nxp.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1536110667-23530-1-git-send-email-Anson.Huang@nxp.com> Sender: linux-kernel-owner@vger.kernel.org To: gregkh@linuxfoundation.org, jslaby@suse.com, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, u.kleine-koenig@pengutronix.de Cc: Linux-imx@nxp.com List-Id: linux-serial@vger.kernel.org On some i.MX SoCs' low power mode, such as i.MX7D's LPSR(low power state retention), UART iomux settings will be lost, need to add pinctrl sleep/default mode switch during suspend/resume to make sure UART iomux settings are correct after resume. Signed-off-by: Anson Huang --- drivers/tty/serial/imx.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index c15332d..6ccb5c4 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -2449,6 +2450,8 @@ static int imx_uart_suspend_noirq(struct device *dev) clk_disable(sport->clk_ipg); + pinctrl_pm_select_sleep_state(dev); + return 0; } @@ -2457,6 +2460,8 @@ static int imx_uart_resume_noirq(struct device *dev) struct imx_port *sport = dev_get_drvdata(dev); int ret; + pinctrl_pm_select_default_state(dev); + ret = clk_enable(sport->clk_ipg); if (ret) return ret; -- 2.7.4