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Subject[PATCH 4.14 244/496] can: m_can: select pinctrl state in each suspend/resume function
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

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

[ 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>
---
drivers/net/can/m_can/m_can.c | 5 +++++
1 file changed, 5 insertions(+)

--- 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(
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(s
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;

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