From ecc9d0195b2411bd38c5deae38f255026c20c970 Mon Sep 17 00:00:00 2001 From: Daniel Golle Date: Mon, 11 Mar 2024 18:32:38 +0000 Subject: [PATCH] mediatek: mt7988: fix clk for 2nd PCIe port Due to what seems to be an undocumented oddity in MediaTek's MT7988 SoC design the CLK_INFRA_PCIE_PERI_26M_CK_P2 clock requires CLK_INFRA_PCIE_PERI_26M_CK_P3 to be enabled. This currently leads to PCIe port 2 not working in Linux. Reflect the apparent relationship in the clk driver to make sure PCIe port 2 of the MT7988 SoC works. Signed-off-by: Daniel Golle --- ...988-infracfg-fix-clocks-for-2nd-PCIe.patch | 31 +++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 target/linux/mediatek/patches-6.1/252-clk-mediatek-mt7988-infracfg-fix-clocks-for-2nd-PCIe.patch diff --git a/target/linux/mediatek/patches-6.1/252-clk-mediatek-mt7988-infracfg-fix-clocks-for-2nd-PCIe.patch b/target/linux/mediatek/patches-6.1/252-clk-mediatek-mt7988-infracfg-fix-clocks-for-2nd-PCIe.patch new file mode 100644 index 00000000000..c4760b9eff9 --- /dev/null +++ b/target/linux/mediatek/patches-6.1/252-clk-mediatek-mt7988-infracfg-fix-clocks-for-2nd-PCIe.patch @@ -0,0 +1,31 @@ +From c202f510bbaa34ab5d65a69a61e0e72761374b17 Mon Sep 17 00:00:00 2001 +From: Daniel Golle +Date: Mon, 11 Mar 2024 17:14:19 +0000 +Subject: [PATCH] clk: mediatek: mt7988-infracfg: fix clocks for 2nd PCIe port + +Due to what seems to be an undocumented oddity in MediaTek's MT7988 +SoC design the CLK_INFRA_PCIE_PERI_26M_CK_P2 clock requires +CLK_INFRA_PCIE_PERI_26M_CK_P3 to be enabled. + +This currently leads to PCIe port 2 not working in Linux. + +Reflect the apparent relationship in the clk driver to make sure PCIe +port 2 of the MT7988 SoC works. + +Suggested-by: Sam Shih +Signed-off-by: Daniel Golle +--- + drivers/clk/mediatek/clk-mt7988-infracfg.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/clk/mediatek/clk-mt7988-infracfg.c ++++ b/drivers/clk/mediatek/clk-mt7988-infracfg.c +@@ -156,7 +156,7 @@ static const struct mtk_gate infra_clks[ + GATE_INFRA0(CLK_INFRA_PCIE_PERI_26M_CK_P1, "infra_pcie_peri_ck_26m_ck_p1", + "csw_infra_f26m_sel", 8), + GATE_INFRA0(CLK_INFRA_PCIE_PERI_26M_CK_P2, "infra_pcie_peri_ck_26m_ck_p2", +- "csw_infra_f26m_sel", 9), ++ "infra_pcie_peri_ck_26m_ck_p3", 9), + GATE_INFRA0(CLK_INFRA_PCIE_PERI_26M_CK_P3, "infra_pcie_peri_ck_26m_ck_p3", + "csw_infra_f26m_sel", 10), + /* INFRA1 */