Re: [PATCH v7 4/8] Bluetooth: btqca: Redefine qca_uart_setup() to generic function.

[Matthias Kaehlcke <mka@chromium.org>]

On Sat, Jun 16, 2018 at 11:57:14AM +0530, Balakrishna Godavarthi wrote:
> Redefinition of qca_uart_setup will help future Qualcomm Bluetooth
> SoC, to use the same function instead of duplicating the function.
> Added new arguments soc_type and soc_ver to the functions.
> 
> These arguments will help to decide type of firmware files
> to be loaded into Bluetooth chip.
> soc_type holds the Bluetooth chip connected to APPS processor.
> soc_ver holds the Bluetooth chip version.
> 
> Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
> ---
> 
> Changes in v7:
> 	* initial patch
> 	* redefined qca_uart_setup function to generic.
>  
> ---
>  drivers/bluetooth/btqca.c   | 23 ++++++++++++-----------
>  drivers/bluetooth/btqca.h   | 13 +++++++++++--
>  drivers/bluetooth/hci_qca.c |  3 ++-
>  3 files changed, 25 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
> index c5cf9cab438a..f748730039cf 100644
> --- a/drivers/bluetooth/btqca.c
> +++ b/drivers/bluetooth/btqca.c
> @@ -327,9 +327,9 @@ int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
>  }
>  EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
>  
> -int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate)
> +int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate, uint8_t soc_type,

Use 'enum qca_btsoc_type' as type for 'soc_type'.

> +		   u32 soc_ver)
>  {
> -	u32 rome_ver = 0;
>  	struct rome_config config;
>  	int err;
>  
> @@ -337,19 +337,20 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate)
>  
>  	config.user_baud_rate = baudrate;
>  
> -	/* Get QCA version information */
> -	err = qca_read_soc_version(hdev, &rome_ver);
> -	if (err < 0 || rome_ver == 0) {
> -		bt_dev_err(hdev, "QCA Failed to get version %d", err);
> -		return err;
> +	if (!soc_ver) {
> +		/* Get QCA version information */
> +		err = qca_read_soc_version(hdev, &soc_ver);
> +		if (err < 0 || soc_ver == 0) {
> +			bt_dev_err(hdev, "QCA Failed to get version %d", err);
> +			return err;
> +		}
> +		bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
>  	}

Why is this needed? A caller that passes in soc_ver = 0 could just
call qca_read_soc_version() themselves.