From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Date: Wed, 18 Oct 2023 08:56:17 +0000 (+0900)
Subject: PCI: Add T_PVPERL macro
X-Git-Tag: io_uring-6.7-2023-11-10~23^2~7^2~15
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=164f66be0c2523e65df41b755c41b7c9ff58035a;p=linux-block.git

PCI: Add T_PVPERL macro

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.

Link: https://lore.kernel.org/linux-pci/20231018085631.1121289-2-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
---

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.