netdev - [PATCH net-next 12/18] can: tcan4x5x: add deinit callback to set standby mode

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Message-ID: <20250110112712.3214173-13-mkl@pengutronix.de>
Date: Fri, 10 Jan 2025 12:04:20 +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 12/18] can: tcan4x5x: add deinit callback to set standby mode

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

At 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-v3-2-90bafaf5eccd@geanix.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/m_can/tcan4x5x-core.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/tcan4x5x-core.c
index 4c9454176607..e5c162f8c589 100644
--- a/drivers/net/can/m_can/tcan4x5x-core.c
+++ b/drivers/net/can/m_can/tcan4x5x-core.c
@@ -279,6 +279,14 @@ static int tcan4x5x_init(struct m_can_classdev *cdev)
 	return ret;
 }
 
+static int tcan4x5x_deinit(struct m_can_classdev *cdev)
+{
+	struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
+
+	return regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
+				  TCAN4X5X_MODE_SEL_MASK, TCAN4X5X_MODE_STANDBY);
+};
+
 static int tcan4x5x_disable_wake(struct m_can_classdev *cdev)
 {
 	struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
@@ -376,6 +384,7 @@ static int tcan4x5x_get_gpios(struct m_can_classdev *cdev,
 
 static const struct m_can_ops tcan4x5x_ops = {
 	.init = tcan4x5x_init,
+	.deinit = tcan4x5x_deinit,
 	.read_reg = tcan4x5x_read_reg,
 	.write_reg = tcan4x5x_write_reg,
 	.write_fifo = tcan4x5x_write_fifo,
-- 
2.45.2