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

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Message-ID: <20241114-unique-oyster-of-honor-963b97-mkl@pengutronix.de>
Date: Thu, 14 Nov 2024 10:33:01 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Sean Nyekjaer <sean@...nix.com>
Cc: Chandrasekar Ramakrishnan <rcsekar@...sung.com>, 
	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>, linux-can@...r.kernel.org, netdev@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] can: tcan4x5x: add deinit callback to set standby
 mode

On 11.11.2024 11:51:24, Sean Nyekjaer wrote:
> 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 regmap_update_bits();

Marc

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