netdev - [PATCH 6/6] can: m_can: select pinctrl state in each suspend/resume function

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Date:   Mon, 12 Mar 2018 11:04:10 +0100
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, linux-can@...r.kernel.org,
        kernel@...gutronix.de, Bich HEMON <bich.hemon@...com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 6/6] can: m_can: select pinctrl state in each suspend/resume function

From: Bich HEMON <bich.hemon@...com>

Make sure to apply the correct pin state in suspend/resume callbacks.
Putting pins in sleep state saves power.

Signed-off-by: Bich Hemon <bich.hemon@...com>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/m_can/m_can.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 74170b0d23cf..b397a33f3d32 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -26,6 +26,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/iopoll.h>
 #include <linux/can/dev.h>
+#include <linux/pinctrl/consumer.h>
 
 /* napi related */
 #define M_CAN_NAPI_WEIGHT	64
@@ -1700,6 +1701,8 @@ static __maybe_unused int m_can_suspend(struct device *dev)
 		m_can_clk_stop(priv);
 	}
 
+	pinctrl_pm_select_sleep_state(dev);
+
 	priv->can.state = CAN_STATE_SLEEPING;
 
 	return 0;
@@ -1710,6 +1713,8 @@ static __maybe_unused int m_can_resume(struct device *dev)
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct m_can_priv *priv = netdev_priv(ndev);
 
+	pinctrl_pm_select_default_state(dev);
+
 	m_can_init_ram(priv);
 
 	priv->can.state = CAN_STATE_ERROR_ACTIVE;
-- 
2.16.1