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can: m_can: select pinctrl state in each suspend/resume function
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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>
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Bich HEMON authored and Marc Kleine-Budde committed Mar 12, 2018
1 parent ffd137f commit c9b3bce
Showing 1 changed file with 5 additions and 0 deletions.
5 changes: 5 additions & 0 deletions drivers/net/can/m_can/m_can.c
Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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;
Expand All @@ -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;
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