Gh0st
/
linux
mirror of https://github.com/torvalds/linux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

PCI: mediatek: Use generic MACRO for TPVPERL delay 

Use the generic PCI MACRO for TPVPERL delay to wait for clock and power
stabilization after PERST# Signal instead of the raw value of 100 ms.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patch.msgid.link/20251020111121.31779-5-ansuelsmth@gmail.com
This commit is contained in:
Christian Marangi 2025-10-20 13:11:08 +02:00 committed by Manivannan Sadhasivam
parent 04305367fa
commit 2d58bc7777
1 changed files with 1 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/pci/controller/pcie-mediatek.c
View File

@ -697,12 +697,7 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port)
*/
writel(PCIE_LINKDOWN_RST_EN, port->base + PCIE_RST_CTRL);
/*
* Described in PCIe CEM specification sections 2.2 (PERST# Signal) and
* 2.2.1 (Initial Power-Up (G3 to S0)). The deassertion of PERST# should
* be delayed 100ms (TPVPERL) for the power and clock to become stable.
*/
msleep(100);
msleep(PCIE_T_PVPERL_MS);
/* De-assert PHY, PE, PIPE, MAC and configuration reset */
val = readl(port->base + PCIE_RST_CTRL);