Re: [PATCH 07/11] i2c: nvidia-gpu: Replace ccgx to well-known regex

[Jon Hunter <jonathanh@nvidia.com>]

On 24/10/2022 08:41, Wayne Chang wrote:
> ccgx is refer to the cypress cypd4226 typec controller.
> Replace ccgx to well-known regex "cypress".
> 
> Signed-off-by: Wayne Chang <waynec@nvidia.com>
> ---
>   drivers/i2c/busses/i2c-nvidia-gpu.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/i2c/busses/i2c-nvidia-gpu.c b/drivers/i2c/busses/i2c-nvidia-gpu.c
> index 12e330cd7635..0934f8ad7f49 100644
> --- a/drivers/i2c/busses/i2c-nvidia-gpu.c
> +++ b/drivers/i2c/busses/i2c-nvidia-gpu.c
> @@ -260,7 +260,7 @@ MODULE_DEVICE_TABLE(pci, gpu_i2c_ids);
>   
>   static const struct property_entry ccgx_props[] = {
>   	/* Use FW built for NVIDIA (nv) only */
> -	PROPERTY_ENTRY_U16("ccgx,firmware-build", ('n' << 8) | 'v'),
> +	PROPERTY_ENTRY_U16("cypress,firmware-build", ('n' << 8) | 'v'),
>   	{ }
>   };
>   


Could we change this to be PROPERTY_ENTRY_STRING instead of 
PROPERTY_ENTRY_U16? The benefit of this would be to allow us to use a 
proper string identifier in device-tree for the Tegra devices which is 
more flexible and descriptive.

So given that this is for NVIDIA GPUs, we could simply make this ...

  PROPERTY_ENTRY_STRING("cypress,firmware-build", "nvidia,gpu"),

Then in the ucsi_ccg.c driver, when we read the device property 
"cypress,firmware-build", if it is 'nvidia,gpu' then we set the 
uc->fw_build variable to CCG_FW_BUILD_NVIDIA.

Jon

-- 
nvpublic