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@@ -4,6 +4,7 @@
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*/
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#include <common.h>
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+#include <cpu.h>
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#include <dm.h>
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#include <init.h>
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#include <dm/lists.h>
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@@ -79,6 +80,36 @@ static int timer_post_probe(struct udevice *dev)
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return 0;
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}
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+/*
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+ * TODO: should be CONFIG_IS_ENABLED(CPU), but the SPL config has _SUPPORT on
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+ * the end...
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+ */
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+#if defined(CONFIG_CPU) || defined(CONFIG_SPL_CPU_SUPPORT)
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+int timer_timebase_fallback(struct udevice *dev)
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+{
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+ struct udevice *cpu;
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+ struct cpu_platdata *cpu_plat;
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+ struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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+
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+ /* Did we get our clock rate from the device tree? */
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+ if (uc_priv->clock_rate)
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+ return 0;
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+
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+ /* Fall back to timebase-frequency */
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+ dev_dbg(dev, "missing clocks or clock-frequency property; falling back on timebase-frequency\n");
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+ cpu = cpu_get_current_dev();
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+ if (!cpu)
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+ return -ENODEV;
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+
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+ cpu_plat = dev_get_parent_platdata(cpu);
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+ if (!cpu_plat)
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+ return -ENODEV;
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+
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+ uc_priv->clock_rate = cpu_plat->timebase_freq;
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+ return 0;
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+}
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+#endif
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+
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u64 timer_conv_64(u32 count)
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{
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/* increment tbh if tbl has rolled over */
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