From c0a3c89938c235402c0a5a6f27de868650673fdf Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Fri, 13 Oct 2017 11:20:39 +0200
Subject: bsp/altera-cyclone-v: Update clock frequencies

---
 .../libbsp/arm/altera-cyclone-v/startup/bspstart.c | 75 +++++++++++++++++++++-
 1 file changed, 73 insertions(+), 2 deletions(-)

diff --git a/c/src/lib/libbsp/arm/altera-cyclone-v/startup/bspstart.c b/c/src/lib/libbsp/arm/altera-cyclone-v/startup/bspstart.c
index c10dad3b45..ef62790259 100644
--- a/c/src/lib/libbsp/arm/altera-cyclone-v/startup/bspstart.c
+++ b/c/src/lib/libbsp/arm/altera-cyclone-v/startup/bspstart.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2015 embedded brains GmbH.  All rights reserved.
+ * Copyright (c) 2013, 2017 embedded brains GmbH.  All rights reserved.
  *
  *  embedded brains GmbH
  *  Dornierstr. 4
@@ -14,11 +14,82 @@
 
 #include <bsp/bootcard.h>
 #include <bsp/arm-a9mpcore-clock.h>
+#include <bsp/fdt.h>
 #include <bsp/irq-generic.h>
 #include <bsp/linker-symbols.h>
 
-void bsp_start( void )
+#include <alt_clock_manager.h>
+
+#include <libfdt.h>
+
+static void set_clock(
+  const void *fdt,
+  int parent,
+  ALT_CLK_t clk,
+  const char *name
+)
+{
+  int node;
+  int len;
+  const uint32_t *val;
+
+  node = fdt_subnode_offset(fdt, parent, name);
+  val = fdt_getprop(fdt, node, "clock-frequency", &len);
+
+  if (val != NULL && len >= 4) {
+    alt_clk_ext_clk_freq_set(clk, fdt32_to_cpu(val[0]));
+  }
+}
+
+static void set_clock_by_output_name(
+  const void *fdt,
+  ALT_CLK_t clk,
+  const char *clock_output_name
+)
+{
+  int node;
+  int len;
+  const uint32_t *val;
+
+  node = fdt_node_offset_by_prop_value(
+    fdt,
+    -1,
+    "clock-output-names",
+    clock_output_name,
+    strlen(clock_output_name) + 1
+  );
+  val = fdt_getprop(fdt, node, "clock-frequency", &len);
+
+  if (val != NULL && len >= 4) {
+    alt_clk_ext_clk_freq_set(clk, fdt32_to_cpu(val[0]));
+  }
+}
+
+static void update_clocks(void)
+{
+  const void *fdt;
+  int parent;
+
+  fdt = bsp_fdt_get();
+
+  /* Try to set by node name */
+  parent = fdt_node_offset_by_compatible(fdt, -1, "altr,clk-mgr");
+  parent = fdt_subnode_offset(fdt, parent, "clocks");
+  set_clock(fdt, parent, ALT_CLK_OSC1, "osc1");
+  set_clock(fdt, parent, ALT_CLK_IN_PIN_OSC2, "osc2");
+  set_clock(fdt, parent, ALT_CLK_F2H_PERIPH_REF, "f2s_periph_ref_clk");
+  set_clock(fdt, parent, ALT_CLK_F2H_SDRAM_REF, "f2s_sdram_ref_clk");
+
+  /* Try to set by "clock-output-names" property value */
+  set_clock_by_output_name(fdt, ALT_CLK_OSC1, "hps_0_eosc1-clk");
+  set_clock_by_output_name(fdt, ALT_CLK_IN_PIN_OSC2, "hps_0_eosc2-clk");
+  set_clock_by_output_name(fdt, ALT_CLK_F2H_PERIPH_REF, "hps_0_f2s_periph_ref_clk-clk");
+  set_clock_by_output_name(fdt, ALT_CLK_F2H_SDRAM_REF, "hps_0_f2s_sdram_ref_clk-clk");
+}
+
+void bsp_start(void)
 {
+  update_clocks();
   a9mpcore_clock_initialize_early();
   bsp_interrupt_initialize();
   rtems_cache_coherent_add_area(
-- 
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