svn commit: r337004 - head/sys/dev/ofw
Emmanuel Vadot
manu at FreeBSD.org
Tue Jul 31 20:50:51 UTC 2018
Author: manu
Date: Tue Jul 31 20:50:50 2018
New Revision: 337004
URL: https://svnweb.freebsd.org/changeset/base/337004
Log:
ofw_cpu: Add support for getting cpu clock via clock property
Nominal Mhz is either expressed via the clock-frequency property
or can be get via the clock property that holds the cpu clock.
Add support for the later.
Reviewed by: nwhitehorn
Differential Revision: https://reviews.freebsd.org/D16346
Modified:
head/sys/dev/ofw/ofw_cpu.c
Modified: head/sys/dev/ofw/ofw_cpu.c
==============================================================================
--- head/sys/dev/ofw/ofw_cpu.c Tue Jul 31 19:35:34 2018 (r337003)
+++ head/sys/dev/ofw/ofw_cpu.c Tue Jul 31 20:50:50 2018 (r337004)
@@ -45,6 +45,10 @@ __FBSDID("$FreeBSD$");
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/ofw_cpu.h>
+#ifdef EXT_RESOURCES
+#include <dev/extres/clk/clk.h>
+#endif
+
static int ofw_cpulist_probe(device_t);
static int ofw_cpulist_attach(device_t);
static const struct ofw_bus_devinfo *ofw_cpulist_get_devinfo(device_t dev,
@@ -203,6 +207,10 @@ ofw_cpu_attach(device_t dev)
phandle_t node;
pcell_t cell;
int rv;
+#ifdef EXT_RESOURCES
+ clk_t cpuclk;
+ uint64_t freq;
+#endif
sc = device_get_softc(dev);
psc = device_get_softc(device_get_parent(dev));
@@ -269,12 +277,28 @@ ofw_cpu_attach(device_t dev)
sc->sc_cpu_pcpu = pcpu_find(device_get_unit(dev));
if (OF_getencprop(node, "clock-frequency", &cell, sizeof(cell)) < 0) {
- if (bootverbose)
- device_printf(dev,
- "missing 'clock-frequency' property\n");
+#ifdef EXT_RESOURCES
+ rv = clk_get_by_ofw_index(dev, 0, 0, &cpuclk);
+ if (rv == 0) {
+ rv = clk_get_freq(cpuclk, &freq);
+ if (rv != 0 && bootverbose)
+ device_printf(dev,
+ "Cannot get freq of property clocks\n");
+ else
+ sc->sc_nominal_mhz = freq / 1000000;
+ } else
+#endif
+ {
+ if (bootverbose)
+ device_printf(dev,
+ "missing 'clock-frequency' property\n");
+ }
} else
sc->sc_nominal_mhz = cell / 1000000; /* convert to MHz */
+ if (sc->sc_nominal_mhz != 0 && bootverbose)
+ device_printf(dev, "Nominal frequency %dMhz\n",
+ sc->sc_nominal_mhz);
bus_generic_probe(dev);
return (bus_generic_attach(dev));
}
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