linux-kernel - [PATCH v2 0/2] PCI: imx6: Refine apps

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Message-Id: <20250612022747.1206053-1-hongxing.zhu@nxp.com>
Date: Thu, 12 Jun 2025 10:27:45 +0800
From: Richard Zhu <hongxing.zhu@....com>
To: tharvey@...eworks.com,
	frank.li@....com,
	l.stach@...gutronix.de,
	lpieralisi@...nel.org,
	kw@...ux.com,
	manivannan.sadhasivam@...aro.org,
	robh@...nel.org,
	bhelgaas@...gle.com,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com
Cc: linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/2] PCI: imx6: Refine apps_reset and EP link behavior

apps_reset is LTSSM_EN on i.MX7, i.MX8MQ, i.MX8MM and i.MX8MP platforms.
Since the assertion/de-assertion of apps_reset(LTSSM_EN bit) had been
wrappered in imx_pcie_ltssm_enable() and imx_pcie_ltssm_disable();

Remove apps_reset toggle in imx_pcie_assert_core_reset() and
imx_pcie_deassert_core_reset() functions. Use imx_pcie_ltssm_enable()
and imx_pcie_ltssm_disable() to configure apps_reset directly.

Fix fail[1] to enumerate reliably PI7C9X2G608GP (hotplug) at i.MX8MM,
which reported By Tim.

Main changes in v2:
- Respin "PCI: imx6: Align EP link start behavior with" patch.
- Add the apps_reset refine patch into this patch-set.

[1]https://lore.kernel.org/all/CAJ+vNU3ohR2YKTwC4xoYrc1z-neDoH2TTZcMHDy+poj9=jSy+w@mail.gmail.com/

[PATCH v2 1/2] PCI: imx6: Remove apps_reset toggle in _core_reset
[PATCH v2 2/2] PCI: imx6: Align EP link start behavior with

drivers/pci/controller/dwc/pci-imx6.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)