[PATCH] pci: imx: disable imx6sdl LTSSM upon driver remove

Tim Harvey tharvey at gateworks.com
Fri Apr 16 22:30:41 CEST 2021

commit 6ecbe1375671 ("drivers: pci: imx: add imx_pcie_remove function")
attempted to resolve an issue caused by MX6QDL not having a proper
intneral PCIe core reset and thus hanging during kernel init if the
bootloader had enabled PCI.

The issue exists for IMX6Q, IMX6D, IXM6S, and IMX6DL. Fix the case for
IMX6S and IMX6DL getting missed.

This fixes IMX6S and IMX6DL with PCI enabled in U-Boot booting for
Linux v4.11+.

Signed-off-by: Tim Harvey <tharvey at gateworks.com>
 drivers/pci/pcie_imx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/pcie_imx.c b/drivers/pci/pcie_imx.c
index d9c2325a22..73875e00db 100644
--- a/drivers/pci/pcie_imx.c
+++ b/drivers/pci/pcie_imx.c
@@ -473,7 +473,7 @@ static int imx6_pcie_assert_core_reset(struct imx_pcie_priv *priv,
 	 * If both LTSSM_ENABLE and REF_SSP_ENABLE are active we have a strong
 	 * indication that the bootloader activated the link.
-	if (is_mx6dq() && prepare_for_boot) {
+	if ((is_mx6dq() || is_mx6sdl()) && prepare_for_boot) {
 		u32 val, gpr1, gpr12;
 		gpr1 = readl(&iomuxc_regs->gpr[1]);

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