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

[Niklas Cassel]

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>
---
 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