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[06/12] PCI: dw-rockchip: Add rockchip_pcie_ltssm() helper

Message ID 20240424-rockchip-pcie-ep-v1-v1-6-b1a02ddad650@kernel.org
State New
Headers show
Series PCI: dw-rockchip: Add endpoint mode support | expand

Commit Message

Niklas Cassel April 24, 2024, 3:16 p.m. UTC 
Add a rockchip_pcie_ltssm() helper function that reads the LTSSM status.
This helper will be used in additional places in follow-up patches.

Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/pci/controller/dwc/pcie-dw-rockchip.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
index 1993c430b90c..4023fd86176f 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 inline u32 rockchip_pcie_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_ltssm(rockchip);
 
 	if ((val & PCIE_LINKUP) == PCIE_LINKUP &&
 	    (val & PCIE_LTSSM_STATUS_MASK) == PCIE_L0S_ENTRY)