4.14-stable review patch. If anyone has any objections, please let me know.
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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;