linux-kernel - Re: [PATCH v4 3/7] serial: exar: add optional board

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Date: Thu, 18 Apr 2024 14:32:51 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Parker Newman <parker@...est.io>
cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
    Jiri Slaby <jirislaby@...nel.org>, LKML <linux-kernel@...r.kernel.org>, 
    linux-serial <linux-serial@...r.kernel.org>, 
    Parker Newman <pnewman@...necttech.com>
Subject: Re: [PATCH v4 3/7] serial: exar: add optional board_init function

On Wed, 17 Apr 2024, Parker Newman wrote:

> From: Parker Newman <pnewman@...necttech.com>
> 
> Add an optional "board_init()" function pointer to struct exar8250_board
> which is called once during probe prior to setting up the ports. It will
> be used in subsequent patches of this series.
> 
> Signed-off-by: Parker Newman <pnewman@...necttech.com>
> ---
> Changes in v3:
>  - Renamed board_setup to board_init.
>  - Changed pci_err to dev_err_probe
>  - Added note above about checkpatch fixes
> 
> Changes in v4:
>  - Removed checkpatch fixes, they will be in their own patch at the end
>  - Added pcidev to board_init() args to avoid needing to add to priv
> 
>  drivers/tty/serial/8250/8250_exar.c | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
> index 72385c7d2eda..f14f73d250bb 100644
> --- a/drivers/tty/serial/8250/8250_exar.c
> +++ b/drivers/tty/serial/8250/8250_exar.c
> @@ -177,12 +177,14 @@ struct exar8250_platform {
>   * struct exar8250_board - board information
>   * @num_ports: number of serial ports
>   * @reg_shift: describes UART register mapping in PCI memory
> - * @setup: quirk run at ->probe() stage
> + * @board_init: quirk run once at ->probe() stage before setting up ports
> + * @setup: quirk run at ->probe() stage for each port
>   * @exit: quirk run at ->remove() stage
>   */
>  struct exar8250_board {
>  	unsigned int num_ports;
>  	unsigned int reg_shift;
> +	int     (*board_init)(struct exar8250 *priv, struct pci_dev *pcidev);
>  	int	(*setup)(struct exar8250 *, struct pci_dev *,
>  			 struct uart_8250_port *, int);
>  	void	(*exit)(struct pci_dev *pcidev);
> @@ -773,6 +775,15 @@ exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
>  	if (rc)
>  		return rc;
> 
> +	if (board->board_init) {
> +		rc = board->board_init(priv, pcidev);
> +		if (rc) {
> +			dev_err_probe(&pcidev->dev, rc,
> +					"failed to init serial board\n");
> +			return rc;
> +		}
> +	}
> +

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

-- 
 i.