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Add pending PCI patch that should correctly fix mediatek driver with Airoha SoC. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
39 lines
1.7 KiB
Diff
39 lines
1.7 KiB
Diff
From 0c9d2d2ef0d916b490a9222ed20ff4616fca876d Mon Sep 17 00:00:00 2001
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Message-ID: <0c9d2d2ef0d916b490a9222ed20ff4616fca876d.1736960708.git.lorenzo@kernel.org>
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In-Reply-To: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
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References: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
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From: Lorenzo Bianconi <lorenzo@kernel.org>
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Date: Wed, 8 Jan 2025 10:50:42 +0100
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Subject: [PATCH 3/6] PCI: mediatek-gen3: Add comment about initialization
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order in mtk_pcie_en7581_power_up()
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Add a comment in mtk_pcie_en7581_power_up() to clarify, unlike the other
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MediaTek Gen3 controllers, the Airoha EN7581 requires PHY initialization
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and power-on before PHY reset deassert.
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Link: https://lore.kernel.org/r/20250108-pcie-en7581-fixes-v6-3-21ac939a3b9b@kernel.org
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Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
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Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
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Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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---
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drivers/pci/controller/pcie-mediatek-gen3.c | 4 ++++
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1 file changed, 4 insertions(+)
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--- a/drivers/pci/controller/pcie-mediatek-gen3.c
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+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
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@@ -887,6 +887,10 @@ static int mtk_pcie_en7581_power_up(stru
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/* Wait for the time needed to complete the reset lines assert. */
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mdelay(PCIE_EN7581_RESET_TIME_MS);
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+ /*
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+ * Unlike the other MediaTek Gen3 controllers, the Airoha EN7581
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+ * requires PHY initialization and power-on before PHY reset deassert.
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+ */
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err = phy_init(pcie->phy);
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if (err) {
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dev_err(dev, "failed to initialize PHY\n");
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