can: m_can: select pinctrl state in each suspend/resume function

[ Upstream commit c9b3bce18da4a0aebc27853052dea39aa64b7d75 ]

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@st.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 671947bc99ee15e6f90e444550aabff148a292c7..5d4e61741476660b925e80a81ca1d41c17587f3b 100644 (file)
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -25,6 +25,7 @@
 #include <linux/platform_device.h>
 #include <linux/iopoll.h>
 #include <linux/can/dev.h>
+#include <linux/pinctrl/consumer.h>
 
 /* napi related */
 #define M_CAN_NAPI_WEIGHT      64
@@ -1682,6 +1683,8 @@ 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;
@@ -1692,6 +1695,8 @@ 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;