add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/pci/controller/dwc/pcie-tegra194.c
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@@ -239,6 +239,7 @@
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 #define EP_STATE_ENABLED	1
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 static const unsigned int pcie_gen_freq[] = {
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+	GEN1_CORE_CLK_FREQ,	/* PCI_EXP_LNKSTA_CLS == 0; undefined */
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 	GEN1_CORE_CLK_FREQ,
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 	GEN2_CORE_CLK_FREQ,
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 	GEN3_CORE_CLK_FREQ,
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@@ -470,7 +471,11 @@
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 	speed = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA) &
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 		PCI_EXP_LNKSTA_CLS;
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-	clk_set_rate(pcie->core_clk, pcie_gen_freq[speed - 1]);
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+
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+	if (speed >= ARRAY_SIZE(pcie_gen_freq))
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+		speed = 0;
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+
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+	clk_set_rate(pcie->core_clk, pcie_gen_freq[speed]);
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 	/* If EP doesn't advertise L1SS, just return */
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 	val = dw_pcie_readl_dbi(pci, pcie->cfg_link_cap_l1sub);
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@@ -973,7 +978,11 @@
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 	speed = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA) &
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 		PCI_EXP_LNKSTA_CLS;
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-	clk_set_rate(pcie->core_clk, pcie_gen_freq[speed - 1]);
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+
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+	if (speed >= ARRAY_SIZE(pcie_gen_freq))
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+		speed = 0;
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+
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+	clk_set_rate(pcie->core_clk, pcie_gen_freq[speed]);
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 	tegra_pcie_enable_interrupts(pp);
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