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| author | Niklas Cassel <cassel@kernel.org> | 2024-06-07 13:14:28 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-07-10 01:28:57 +0200 |
| commit | d8b864c95dcb1ad943cdecaf3cdab08217fb70e0 (patch) | |
| tree | 2f78917ed7b98eb2ad7af32ae33b5e03013867a6 /drivers/pci | |
| parent | PCI: dw-rockchip: Fix weird indentation (diff) | |
| download | linux-d8b864c95dcb1ad943cdecaf3cdab08217fb70e0.tar.xz linux-d8b864c95dcb1ad943cdecaf3cdab08217fb70e0.zip | |
PCI: dw-rockchip: Add rockchip_pcie_get_ltssm() helper
Add a rockchip_pcie_ltssm() helper function that reads the LTSSM status.
This helper will be used in additional places in follow-up commits.
Link: https://lore.kernel.org/linux-pci/20240607-rockchip-pcie-ep-v1-v5-8-0a042d6b0049@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-dw-rockchip.c | 7 |
1 files changed, 6 insertions, 1 deletions
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) |