1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/clk/mediatek/clk-mt7988-xfipll.c b/drivers/clk/mediatek/clk-mt7988-xfipll.c
new file mode 100644
index 0000000000..9b9ca54711
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mt7988-xfipll.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 Daniel Golle <daniel@makrotopia.org>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include "clk-mtk.h"
+#include "clk-gate.h"
+#include <dt-bindings/clock/mediatek,mt7988-clk.h>
+
+/* Register to control USXGMII XFI PLL analog */
+#define XFI_PLL_ANA_GLB8		0x108
+#define RG_XFI_PLL_ANA_SWWA		0x02283248
+
+static const struct mtk_gate_regs xfipll_cg_regs = {
+	.set_ofs = 0x8,
+	.clr_ofs = 0x8,
+	.sta_ofs = 0x8,
+};
+
+#define GATE_XFIPLL(_id, _name, _parent, _shift)		\
+	{							\
+		.id = _id,					\
+		.name = _name,					\
+		.parent_name = _parent,				\
+		.regs = &xfipll_cg_regs,			\
+		.shift = _shift,				\
+		.ops = &mtk_clk_gate_ops_no_setclr_inv,		\
+	}
+
+static const struct mtk_fixed_factor xfipll_divs[] = {
+	FACTOR(CLK_XFIPLL_PLL, "xfipll_pll", "top_xtal", 125, 32),
+};
+
+static const struct mtk_gate xfipll_clks[] = {
+	GATE_XFIPLL(CLK_XFIPLL_PLL_EN, "xfipll_pll_en", "xfipll_pll", 31),
+};
+
+static const struct mtk_clk_desc xfipll_desc = {
+	.clks = xfipll_clks,
+	.num_clks = ARRAY_SIZE(xfipll_clks),
+	.factor_clks = xfipll_divs,
+	.num_factor_clks = ARRAY_SIZE(xfipll_divs),
+};
+
+static int clk_mt7988_xfipll_probe(struct platform_device *pdev)
+{
+	struct device_node *node = pdev->dev.of_node;
+	void __iomem *base = of_iomap(node, 0);
+
+	if (!base)
+		return -ENOMEM;
+
+	/* Apply software workaround for USXGMII PLL TCL issue */
+	writel(RG_XFI_PLL_ANA_SWWA, base + XFI_PLL_ANA_GLB8);
+	iounmap(base);
+
+	return mtk_clk_simple_probe(pdev);
+};
+
+static const struct of_device_id of_match_clk_mt7988_xfipll[] = {
+	{ .compatible = "mediatek,mt7988-xfi-pll", .data = &xfipll_desc },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, of_match_clk_mt7988_xfipll);
+
+static struct platform_driver clk_mt7988_xfipll_drv = {
+	.driver = {
+		.name = "clk-mt7988-xfipll",
+		.of_match_table = of_match_clk_mt7988_xfipll,
+	},
+	.probe = clk_mt7988_xfipll_probe,
+	.remove_new = mtk_clk_simple_remove,
+};
+module_platform_driver(clk_mt7988_xfipll_drv);
+
+MODULE_DESCRIPTION("MediaTek MT7988 XFI PLL clock driver");
+MODULE_LICENSE("GPL");