netdev - [PATCH net-next 11/18] can: m

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Message-ID: <20250110112712.3214173-12-mkl@pengutronix.de>
Date: Fri, 10 Jan 2025 12:04:19 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	linux-can@...r.kernel.org,
	kernel@...gutronix.de,
	Sean Nyekjaer <sean@...nix.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 11/18] can: m_can: add deinit callback

From: Sean Nyekjaer <sean@...nix.com>

This is added in preparation for calling standby mode in the tcan4x5x
driver or other users of m_can.
For the tcan4x5x; If Vsup 12V, standby mode will save 7-8mA, when the
interface is down.

Signed-off-by: Sean Nyekjaer <sean@...nix.com>
Link: https://patch.msgid.link/20241122-tcan-standby-v3-1-90bafaf5eccd@geanix.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/m_can/m_can.c | 7 +++++++
 drivers/net/can/m_can/m_can.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 16e9e7d7527d..e31ce973892a 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -1756,6 +1756,13 @@ static void m_can_stop(struct net_device *dev)
 
 	/* set the state as STOPPED */
 	cdev->can.state = CAN_STATE_STOPPED;
+
+	if (cdev->ops->deinit) {
+		ret = cdev->ops->deinit(cdev);
+		if (ret)
+			netdev_err(dev, "failed to deinitialize: %pe\n",
+				   ERR_PTR(ret));
+	}
 }
 
 static int m_can_close(struct net_device *dev)
diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h
index 92b2bd8628e6..6206535341a2 100644
--- a/drivers/net/can/m_can/m_can.h
+++ b/drivers/net/can/m_can/m_can.h
@@ -68,6 +68,7 @@ struct m_can_ops {
 	int (*write_fifo)(struct m_can_classdev *cdev, int addr_offset,
 			  const void *val, size_t val_count);
 	int (*init)(struct m_can_classdev *cdev);
+	int (*deinit)(struct m_can_classdev *cdev);
 };
 
 struct m_can_tx_op {
-- 
2.45.2