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-rw-r--r--drivers/clk/versatile/icst.h54
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/clk/versatile/icst.h b/drivers/clk/versatile/icst.h
new file mode 100644
index 000000000..29622768b
--- /dev/null
+++ b/drivers/clk/versatile/icst.h
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+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
+ *
+ * Support functions for calculating clocks/divisors for the ICST
+ * clock generators. See https://www.idt.com/ for more information
+ * on these devices.
+ */
+#ifndef ICST_H
+#define ICST_H
+
+struct icst_params {
+ unsigned long ref;
+ unsigned long vco_max; /* inclusive */
+ unsigned long vco_min; /* exclusive */
+ unsigned short vd_min; /* inclusive */
+ unsigned short vd_max; /* inclusive */
+ unsigned char rd_min; /* inclusive */
+ unsigned char rd_max; /* inclusive */
+ const unsigned char *s2div; /* chip specific s2div array */
+ const unsigned char *idx2s; /* chip specific idx2s array */
+};
+
+struct icst_vco {
+ unsigned short v;
+ unsigned char r;
+ unsigned char s;
+};
+
+unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco);
+struct icst_vco icst_hz_to_vco(const struct icst_params *p, unsigned long freq);
+
+/*
+ * ICST307 VCO frequency must be between 6MHz and 200MHz (3.3 or 5V).
+ * This frequency is pre-output divider.
+ */
+#define ICST307_VCO_MIN 6000000
+#define ICST307_VCO_MAX 200000000
+
+extern const unsigned char icst307_s2div[];
+extern const unsigned char icst307_idx2s[];
+
+/*
+ * ICST525 VCO frequency must be between 10MHz and 200MHz (3V) or 320MHz (5V).
+ * This frequency is pre-output divider.
+ */
+#define ICST525_VCO_MIN 10000000
+#define ICST525_VCO_MAX_3V 200000000
+#define ICST525_VCO_MAX_5V 320000000
+
+extern const unsigned char icst525_s2div[];
+extern const unsigned char icst525_idx2s[];
+
+#endif