2022-01-09 21:40:31 +00:00
|
|
|
From 759dec2e3dfdbd261c41d2279f04f2351c971a49 Mon Sep 17 00:00:00 2001
|
|
|
|
|
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
|
|
|
|
|
Date: Tue, 30 Nov 2021 18:29:12 +0100
|
|
|
|
|
Subject: [PATCH] PCI: aardvark: Disable link training when unbinding driver
|
|
|
|
|
MIME-Version: 1.0
|
|
|
|
|
Content-Type: text/plain; charset=UTF-8
|
|
|
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
|
|
|
|
|
|
Disable link training circuit in driver unbind sequence. We want to
|
|
|
|
|
leave link training in the same state as it was before the driver was
|
|
|
|
|
probed.
|
|
|
|
|
|
|
|
|
|
Link: https://lore.kernel.org/r/20211130172913.9727-11-kabel@kernel.org
|
|
|
|
|
Signed-off-by: Pali Rohár <pali@kernel.org>
|
|
|
|
|
Signed-off-by: Marek Behún <kabel@kernel.org>
|
|
|
|
|
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
|
|
|
|
|
---
|
|
|
|
|
drivers/pci/controller/pci-aardvark.c | 5 +++++
|
|
|
|
|
1 file changed, 5 insertions(+)
|
|
|
|
|
|
|
|
|
|
--- a/drivers/pci/controller/pci-aardvark.c
|
|
|
|
|
+++ b/drivers/pci/controller/pci-aardvark.c
|
2022-04-13 20:25:50 +00:00
|
|
|
@@ -1740,6 +1740,11 @@ static int advk_pcie_remove(struct platf
|
2022-01-09 21:40:31 +00:00
|
|
|
if (pcie->reset_gpio)
|
|
|
|
|
gpiod_set_value_cansleep(pcie->reset_gpio, 1);
|
|
|
|
|
|
|
|
|
|
+ /* Disable link training */
|
|
|
|
|
+ val = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
|
|
|
|
|
+ val &= ~LINK_TRAINING_EN;
|
|
|
|
|
+ advk_writel(pcie, val, PCIE_CORE_CTRL0_REG);
|
|
|
|
|
+
|
|
|
|
|
/* Disable outbound address windows mapping */
|
|
|
|
|
for (i = 0; i < OB_WIN_COUNT; i++)
|
|
|
|
|
advk_pcie_disable_ob_win(pcie, i);
|
