netdev - Re: [PATCHv2] can: ti hecc module : add platform specific initialization callback.

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Date:	Thu, 25 Feb 2010 19:00:24 +0100
From:	Marc Kleine-Budde <mkl@...gutronix.de>
To:	Sriramakrishnan <srk@...com>
CC:	socketcan-core@...ts.berlios.de, netdev@...r.kernel.org
Subject: Re: [PATCHv2] can: ti hecc module : add platform specific initialization
 callback.

Sriramakrishnan wrote:
> CAN module on AM3517 requires programming of IO expander as part
> of init sequence - to enable CAN PHY. Added platform specific
> callback to handle phy control(switch on /off).
> 
> Signed-off-by: Sriramakrishnan <srk@...com>

looks good, just minor nitpicking inline

Cheers, Marc

> ---
> Modified as per review comments received.
> 
>  drivers/net/can/ti_hecc.c            |   15 ++++++++++++++-
>  include/linux/can/platform/ti_hecc.h |    3 ++-
>  2 files changed, 16 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
> index df27d82..871a3fe 100644
> --- a/drivers/net/can/ti_hecc.c
> +++ b/drivers/net/can/ti_hecc.c
> @@ -28,9 +28,11 @@
>   *         .mbx_offset             = 0x2000,
>   *         .int_line               = 0,
>   *         .revision               = 1,
> + *         .transceiver_switch     = hecc_phy_control,
>   * };
>   *
> - * Please see include/can/platform/ti_hecc.h for description of above fields
> + * Please see include/linux/can/platform/ti_hecc.h for description of
> + * above fields.
>   *
>   */
>  
> @@ -220,6 +222,7 @@ struct ti_hecc_priv {
>  	u32 tx_head;
>  	u32 tx_tail;
>  	u32 rx_next;
> +	void (*transceiver_switch)(int);
>  };
>  
>  static inline int get_tx_head_mb(struct ti_hecc_priv *priv)
> @@ -317,6 +320,13 @@ static int ti_hecc_set_btc(struct ti_hecc_priv *priv)
>  	return 0;
>  }
>  
> +static void ti_hecc_transceiver_switch(const struct ti_hecc_priv *priv,
> +					int on)
> +{
> +	if (priv->transceiver_switch)
> +		priv->transceiver_switch(on);
> +}
> +
>  static void ti_hecc_reset(struct net_device *ndev)
>  {
>  	u32 cnt;
> @@ -824,6 +834,7 @@ static int ti_hecc_open(struct net_device *ndev)
>  		return err;
>  	}
>  
> +	ti_hecc_transceiver_switch(priv, 1);
>  	ti_hecc_start(ndev);
>  	napi_enable(&priv->napi);
>  	netif_start_queue(ndev);
> @@ -840,6 +851,7 @@ static int ti_hecc_close(struct net_device *ndev)
>  	ti_hecc_stop(ndev);
>  	free_irq(ndev->irq, ndev);
>  	close_candev(ndev);
> +	ti_hecc_transceiver_switch(priv, 0);

nitpick: it's not symetric to the _start function.

>  
>  	return 0;
>  }
> @@ -901,6 +913,7 @@ static int ti_hecc_probe(struct platform_device *pdev)
>  	priv->hecc_ram_offset = pdata->hecc_ram_offset;
>  	priv->mbx_offset = pdata->mbx_offset;
>  	priv->int_line = pdata->int_line;
> +	priv->transceiver_switch = pdata->transceiver_switch;
>  
>  	priv->can.bittiming_const = &ti_hecc_bittiming_const;
>  	priv->can.do_set_mode = ti_hecc_do_set_mode;
> diff --git a/include/linux/can/platform/ti_hecc.h b/include/linux/can/platform/ti_hecc.h
> index 4688c7b..825bc6a 100644
> --- a/include/linux/can/platform/ti_hecc.h
> +++ b/include/linux/can/platform/ti_hecc.h
> @@ -23,6 +23,7 @@
>   * @mbx_offset:		Mailbox RAM offset
>   * @int_line:		Interrupt line to use - 0 or 1
>   * @version:		version for future use
> + * @transceiver_switch  platform specific callback fn for transceiver control
                         ^^
nitpick:
these are spaces, but the other lines use tabs

>   *
>   * Platform data structure to get all platform specific settings.
>   * this structure also accounts the fact that the IP may have different
> @@ -35,6 +36,6 @@ struct ti_hecc_platform_data {
>  	u32 mbx_offset;
>  	u32 int_line;
>  	u32 version;
> +	void (*transceiver_switch) (int);
>  };
>  
> -


-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
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