[PATCH v4 08/13] PCI: dw-rockchip: Add rockchip_pcie_get_ltssm() helper

[Manivannan Sadhasivam]

On Wed, May 29, 2024 at 10:29:02AM +0200, Niklas Cassel wrote:
> Add a rockchip_pcie_ltssm() helper function that reads the LTSSM status.
> This helper will be used in additional places in follow-up commits.
> 
> Signed-off-by: Niklas Cassel <cassel at kernel.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>

- Mani

> ---
>  drivers/pci/controller/dwc/pcie-dw-rockchip.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
> index 3dfed08ef456..1380e3a5284b 100644
> --- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c
> +++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
> @@ -143,6 +143,11 @@ static int rockchip_pcie_init_irq_domain(struct rockchip_pcie *rockchip)
>  	return 0;
>  }
>  
> +static u32 rockchip_pcie_get_ltssm(struct rockchip_pcie *rockchip)
> +{
> +	return rockchip_pcie_readl_apb(rockchip, PCIE_CLIENT_LTSSM_STATUS);
> +}
> +
>  static void rockchip_pcie_enable_ltssm(struct rockchip_pcie *rockchip)
>  {
>  	rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_ENABLE_LTSSM,
> @@ -152,7 +157,7 @@ static void rockchip_pcie_enable_ltssm(struct rockchip_pcie *rockchip)
>  static int rockchip_pcie_link_up(struct dw_pcie *pci)
>  {
>  	struct rockchip_pcie *rockchip = to_rockchip_pcie(pci);
> -	u32 val = rockchip_pcie_readl_apb(rockchip, PCIE_CLIENT_LTSSM_STATUS);
> +	u32 val = rockchip_pcie_get_ltssm(rockchip);
>  
>  	if ((val & PCIE_LINKUP) == PCIE_LINKUP &&
>  	    (val & PCIE_LTSSM_STATUS_MASK) == PCIE_L0S_ENTRY)
> 
> -- 
> 2.45.1
> 

-- 
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