netdev - [PATCH 2/3] can: tcan4x5x: add deinit callback to set standby mode

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Message-Id: <20241111-tcan-standby-v1-2-f9337ebaceea@geanix.com>
Date: Mon, 11 Nov 2024 11:51:24 +0100
From: Sean Nyekjaer <sean@...nix.com>
To: Chandrasekar Ramakrishnan <rcsekar@...sung.com>, 
 Marc Kleine-Budde <mkl@...gutronix.de>, 
 Vincent Mailhol <mailhol.vincent@...adoo.fr>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: linux-can@...r.kernel.org, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Sean Nyekjaer <sean@...nix.com>
Subject: [PATCH 2/3] can: tcan4x5x: add deinit callback to set standby mode

At Vsup 12V, standby mode will save 7-8mA, when the interface is
down.

Signed-off-by: Sean Nyekjaer <sean@...nix.com>
---
 drivers/net/can/m_can/tcan4x5x-core.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/tcan4x5x-core.c
index 2f73bf3abad889c222f15c39a3d43de1a1cf5fbb..c8336750cdc276b539dde7555b2510fba0d0da75 100644
--- a/drivers/net/can/m_can/tcan4x5x-core.c
+++ b/drivers/net/can/m_can/tcan4x5x-core.c
@@ -270,6 +270,17 @@ 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);
+	int ret = 0;
+
+	ret = regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
+				 TCAN4X5X_MODE_SEL_MASK, TCAN4X5X_MODE_STANDBY);
+
+	return ret;
+};
+
 static int tcan4x5x_disable_wake(struct m_can_classdev *cdev)
 {
 	struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
@@ -359,6 +370,7 @@ 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,

-- 
2.46.2