| Message ID | 20240529-rockchip-pcie-ep-v1-v4-8-3dc00fe21a78@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | PCI: dw-rockchip: Add endpoint mode support | expand |
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@kernel.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@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 >
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)
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@kernel.org> --- drivers/pci/controller/dwc/pcie-dw-rockchip.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)