linux-kernel - [PATCH can-next v2 2/3] can: tcan4x5x: add deinit callback to set standby mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20241115-tcan-standby-v2-2-4eb02026b237@geanix.com>
Date: Fri, 15 Nov 2024 09:15:51 +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, linux-kernel@...r.kernel.org, 
 Sean Nyekjaer <sean@...nix.com>
Subject: [PATCH can-next v2 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 | 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 2f73bf3abad889c222f15c39a3d43de1a1cf5fbb..7e6eea2c04ee7fbeaa6c8b229f7f64bd04bee309 100644
--- a/drivers/net/can/m_can/tcan4x5x-core.c
+++ b/drivers/net/can/m_can/tcan4x5x-core.c
@@ -270,6 +270,14 @@ 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);
@@ -359,6 +367,7 @@ 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