From: "Krzysztof Wilczyński" <kw@linux.com>
To: Lorenzo Bianconi <lorenzo@kernel.org>
Cc: Ryder Lee <ryder.lee@mediatek.com>,
Jianjun Wang <jianjun.wang@mediatek.com>,
Lorenzo Pieralisi <lpieralisi@kernel.org>,
Rob Herring <robh@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
Christian Marangi <ansuelsmth@gmail.com>,
linux-pci@vger.kernel.org, linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, upstream@airoha.com,
Hui Ma <hui.ma@airoha.com>
Subject: Re: [PATCH v3] PCI: mediatek-gen3: Avoid PCIe resetting via PCIE_RSTB for Airoha EN7581 SoC
Date: Mon, 23 Dec 2024 06:17:59 +0900 [thread overview]
Message-ID: <20241222211759.GF3111282@rocinante> (raw)
In-Reply-To: <20241113-pcie-en7581-rst-fix-v3-1-23c5082335f7@kernel.org>
Hello,
> Airoha EN7581 has a hw bug asserting/releasing PCIE_PE_RSTB signal
> causing occasional PCIe link down issues. In order to overcome the
> problem, PCIE_RSTB signals are not asserted/released during device probe or
> suspend/resume phase and the PCIe block is reset using REG_PCI_CONTROL
> (0x88) and REG_RESET_CONTROL (0x834) registers available in the clock
> module running clk_bulk_prepare_enable in mtk_pcie_en7581_power_up().
>
> Introduce flags field in the mtk_gen3_pcie_pdata struct in order to
> specify per-SoC capabilities.
Applied to controller/mediatek, thank you!
[01/01] PCI: mediatek-gen3: Avoid PCIe resetting via PCIE_RSTB for Airoha EN7581 SoC
https://git.kernel.org/pci/pci/c/0d0a2b74dc08
Krzysztof
next prev parent reply other threads:[~2024-12-22 21:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-13 13:58 [PATCH v3] PCI: mediatek-gen3: Avoid PCIe resetting via PCIE_RSTB for Airoha EN7581 SoC Lorenzo Bianconi
2024-11-19 8:15 ` Lorenzo Bianconi
2024-11-19 17:43 ` Bjorn Helgaas
2024-12-22 21:17 ` Krzysztof Wilczyński [this message]
2024-12-30 18:58 ` Bjorn Helgaas
2025-01-02 11:29 ` Lorenzo Bianconi
2025-01-02 23:28 ` Bjorn Helgaas
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