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)); } _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
