| Message ID | 1386271244-3927-8-git-send-email-tim.kryger@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Dec 5, 2013 at 11:20 AM, Tim Kryger <tim.kryger@linaro.org> wrote: > When an clock is specified in the device tree, enable it and use it to > determine the external clock frequency. > > Signed-off-by: Tim Kryger <tim.kryger@linaro.org> > Reviewed-by: Markus Mayer <markus.mayer@linaro.org> > Reviewed-by: Matt Porter <matt.porter@linaro.org> > --- Reviewed-by: Christian Daudt <bcm@fixthebug.org> Daniel, Are you ok with me pulling this patch in with the rest of the patchset into the bcm tree ? Thanks, csd
On 12/05/2013 08:20 PM, Tim Kryger wrote: > When an clock is specified in the device tree, enable it and use it to > determine the external clock frequency. > > Signed-off-by: Tim Kryger <tim.kryger@linaro.org> > Reviewed-by: Markus Mayer <markus.mayer@linaro.org> > Reviewed-by: Matt Porter <matt.porter@linaro.org> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> > --- > drivers/clocksource/bcm_kona_timer.c | 14 +++++++++++--- > 1 file changed, 11 insertions(+), 3 deletions(-) > > diff --git a/drivers/clocksource/bcm_kona_timer.c b/drivers/clocksource/bcm_kona_timer.c > index 0d7d8c3..8a4ab36 100644 > --- a/drivers/clocksource/bcm_kona_timer.c > +++ b/drivers/clocksource/bcm_kona_timer.c > @@ -17,6 +17,7 @@ > #include <linux/jiffies.h> > #include <linux/clockchips.h> > #include <linux/types.h> > +#include <linux/clk.h> > > #include <linux/io.h> > #include <asm/mach/time.h> > @@ -107,11 +108,18 @@ static const struct of_device_id bcm_timer_ids[] __initconst = { > static void __init kona_timers_init(struct device_node *node) > { > u32 freq; > + struct clk *external_clk; > > - if (!of_property_read_u32(node, "clock-frequency", &freq)) > + external_clk = of_clk_get_by_name(node, NULL); > + > + if (!IS_ERR(external_clk)) { > + arch_timer_rate = clk_get_rate(external_clk); > + clk_prepare_enable(external_clk); > + } else if (!of_property_read_u32(node, "clock-frequency", &freq)) { > arch_timer_rate = freq; > - else > - panic("clock-frequency not set in the .dts file"); > + } else { > + panic("unable to determine clock-frequency"); > + } > > /* Setup IRQ numbers */ > timers.tmr_irq = irq_of_parse_and_map(node, 0); >
diff --git a/drivers/clocksource/bcm_kona_timer.c b/drivers/clocksource/bcm_kona_timer.c index 0d7d8c3..8a4ab36 100644 --- a/drivers/clocksource/bcm_kona_timer.c +++ b/drivers/clocksource/bcm_kona_timer.c @@ -17,6 +17,7 @@ #include <linux/jiffies.h> #include <linux/clockchips.h> #include <linux/types.h> +#include <linux/clk.h> #include <linux/io.h> #include <asm/mach/time.h> @@ -107,11 +108,18 @@ static const struct of_device_id bcm_timer_ids[] __initconst = { static void __init kona_timers_init(struct device_node *node) { u32 freq; + struct clk *external_clk; - if (!of_property_read_u32(node, "clock-frequency", &freq)) + external_clk = of_clk_get_by_name(node, NULL); + + if (!IS_ERR(external_clk)) { + arch_timer_rate = clk_get_rate(external_clk); + clk_prepare_enable(external_clk); + } else if (!of_property_read_u32(node, "clock-frequency", &freq)) { arch_timer_rate = freq; - else - panic("clock-frequency not set in the .dts file"); + } else { + panic("unable to determine clock-frequency"); + } /* Setup IRQ numbers */ timers.tmr_irq = irq_of_parse_and_map(node, 0);