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path: root/drivers/clk/mediatek/clk-mt7988-xfipll.c
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Diffstat (limited to 'drivers/clk/mediatek/clk-mt7988-xfipll.c')
-rw-r--r--drivers/clk/mediatek/clk-mt7988-xfipll.c82
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");