Re: [PATCH v4 3/6] PCI: spacemit-k1: Add device id update helper

[Alex Elder <elder@riscstar.com>]

On 7/8/26 11:00 PM, Inochi Amaoto wrote:
> Both K1 and K3 needs to set vendor id and device id, add a helper function

s/needs/need/

> to simplify this.

I think someone might have commented on this, but I expected to find
that the next patch would fill in the code that's needed to support
K3, but that patch is at the end of your series.

The reason I say it here is that I wondered while looking at this
one why it was needed to create this helper function.  I now know
that k3_pcie_init() will call it (but I had to find that in the
last patch, which was later than I expected).

Your series should start with DT binding changes, then code changes,
and (often) end with DTS changes.

Anyway, this looks good.

Reviewed-by: Alex Elder <elder@riscstar.com>

> Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
> ---
>   drivers/pci/controller/dwc/pcie-spacemit-k1.c | 17 +++++++++++++----
>   1 file changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-spacemit-k1.c b/drivers/pci/controller/dwc/pcie-spacemit-k1.c
> index e22ecbd09579..31aac056b68e 100644
> --- a/drivers/pci/controller/dwc/pcie-spacemit-k1.c
> +++ b/drivers/pci/controller/dwc/pcie-spacemit-k1.c
> @@ -56,6 +56,7 @@ struct k1_pcie_device_data {
>   	const struct dw_pcie_ops *ops;
>   	int (*parse_port)(struct k1_pcie *k1);
>   	unsigned int max_phy_count;
> +	unsigned int device_id;
>   };
>   
>   struct k1_pcie {
> @@ -186,6 +187,16 @@ static void k1_pcie_disable_aspm_l1(struct k1_pcie *k1)
>   	dw_pcie_dbi_ro_wr_dis(pci);
>   }
>   
> +static void k1_pcie_set_device_id(struct k1_pcie *k1)
> +{
> +	struct dw_pcie *pci = &k1->pci;
> +
> +	dw_pcie_dbi_ro_wr_en(pci);
> +	dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, PCI_VENDOR_ID_SPACEMIT);
> +	dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, k1->data->device_id);
> +	dw_pcie_dbi_ro_wr_dis(pci);
> +}
> +
>   static int k1_pcie_init(struct dw_pcie_rp *pp)
>   {
>   	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> @@ -201,10 +212,7 @@ static int k1_pcie_init(struct dw_pcie_rp *pp)
>   		return ret;
>   
>   	/* Set the PCI vendor and device ID */
> -	dw_pcie_dbi_ro_wr_en(pci);
> -	dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, PCI_VENDOR_ID_SPACEMIT);
> -	dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, PCI_DEVICE_ID_SPACEMIT_K1);
> -	dw_pcie_dbi_ro_wr_dis(pci);
> +	k1_pcie_set_device_id(k1);
>   
>   	/*
>   	 * Start by asserting fundamental reset (drive PERST# low).  The
> @@ -406,6 +414,7 @@ static const struct k1_pcie_device_data k1_pcie_device_data = {
>   	.ops		= &k1_pcie_ops,
>   	.parse_port	= k1_pcie_parse_port,
>   	.max_phy_count	= 1,
> +	.device_id	= PCI_DEVICE_ID_SPACEMIT_K1,
>   };
>   
>   static const struct of_device_id k1_pcie_of_match_table[] = {