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Message-ID: <1519907380-15135-1-git-send-email-bich.hemon@st.com>
Date: Thu, 1 Mar 2018 12:29:50 +0000
From: Bich HEMON <bich.hemon@...com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre TORGUE <alexandre.torgue@...com>,
"Jiri Slaby" <jslaby@...e.com>,
"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: Bich HEMON <bich.hemon@...com>
Subject: [PATCH] can: m_can: select pinctrl state in each suspend/resume
function
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>
---
drivers/net/can/m_can/m_can.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 2594f77..a86ef69 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -1700,6 +1700,8 @@ 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 +1712,8 @@ 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;
--
1.9.1
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