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@xxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
- 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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