1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/gpu/drm/loongson/lsdc_gfxpll.h b/drivers/gpu/drm/loongson/lsdc_gfxpll.h
new file mode 100644
index 000000000000..9d59cbfc145d
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_gfxpll.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_GFXPLL_H__
+#define __LSDC_GFXPLL_H__
+
+#include <drm/drm_device.h>
+
+struct loongson_gfxpll;
+
+struct loongson_gfxpll_parms {
+	unsigned int ref_clock;
+	unsigned int div_ref;
+	unsigned int loopc;
+	unsigned int div_out_dc;
+	unsigned int div_out_gmc;
+	unsigned int div_out_gpu;
+};
+
+struct loongson_gfxpll_funcs {
+	int (*init)(struct loongson_gfxpll * const this);
+
+	int (*update)(struct loongson_gfxpll * const this,
+		      struct loongson_gfxpll_parms const *pin);
+
+	void (*get_rates)(struct loongson_gfxpll * const this,
+			  unsigned int *dc, unsigned int *gmc, unsigned int *gpu);
+
+	void (*print)(struct loongson_gfxpll * const this,
+		      struct drm_printer *printer, bool verbose);
+};
+
+struct loongson_gfxpll {
+	struct drm_device *ddev;
+	void __iomem *mmio;
+
+	/* PLL register offset */
+	u32 reg_base;
+	/* PLL register size in bytes */
+	u32 reg_size;
+
+	const struct loongson_gfxpll_funcs *funcs;
+
+	struct loongson_gfxpll_parms parms;
+};
+
+int loongson_gfxpll_create(struct drm_device *ddev,
+			   struct loongson_gfxpll **ppout);
+
+#endif