From d8b864c95dcb1ad943cdecaf3cdab08217fb70e0 Mon Sep 17 00:00:00 2001 From: Niklas Cassel Date: Fri, 7 Jun 2024 13:14:28 +0200 Subject: PCI: dw-rockchip: Add rockchip_pcie_get_ltssm() helper MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Krzysztof Wilczyński Signed-off-by: Bjorn Helgaas Reviewed-by: Manivannan Sadhasivam --- drivers/pci/controller/dwc/pcie-dw-rockchip.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/pci/controller/dwc') 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) -- cgit