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[v25,01/15] PCI: Add T_PVPERL macro

Message ID 20231018085631.1121289-2-yoshihiro.shimoda.uh@renesas.com (mailing list archive)
State Accepted
Delegated to: Krzysztof Wilczyński
Headers show
Series PCI: dwc: rcar-gen4: Add R-Car Gen4 PCIe support | expand

Commit Message

Yoshihiro Shimoda Oct. 18, 2023, 8:56 a.m. UTC 
According to the PCIe CEM r5.0, sec 2.9.2, Power stable to PERST#
inactive interval is 100 ms as minimum. Add a macro so that the PCIe
controller drivers can make use of it.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/pci/pci.h | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 39a8932dc340..5ecbcf041179 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -13,6 +13,9 @@ 
 
 #define PCIE_LINK_RETRAIN_TIMEOUT_MS	1000
 
+/* Power stable to PERST# inactive from PCIe card Electromechanical Spec */
+#define PCIE_T_PVPERL_MS		100
+
 /*
  * PCIe r6.0, sec 5.3.3.2.1 <PME Synchronization>
  * Recommends 1ms to 10ms timeout to check L2 ready.