| Message ID | 1455069267-4784-4-git-send-email-ezequiel@vanguardiasur.com.ar (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 10 February 2016 at 02:54, Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> wrote: > This commit implements the ARM timer-based delay timer for the > LPC32xx, LPC18xx, LPC43xx family of SoCs. > > Also, add a dependency to restrict compiling this driver for > the ARM architecture. > > Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> > --- > drivers/clocksource/Kconfig | 1 + > drivers/clocksource/time-lpc32xx.c | 12 ++++++++++++ > 2 files changed, 13 insertions(+) > > diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig > index 33db7406c0e2..c346be650892 100644 > --- a/drivers/clocksource/Kconfig > +++ b/drivers/clocksource/Kconfig > @@ -160,6 +160,7 @@ config CLKSRC_EFM32 > config CLKSRC_LPC32XX > bool "Clocksource for LPC32XX" if COMPILE_TEST > depends on GENERIC_CLOCKEVENTS && HAS_IOMEM > + depends on ARM > select CLKSRC_MMIO > select CLKSRC_OF > help > diff --git a/drivers/clocksource/time-lpc32xx.c b/drivers/clocksource/time-lpc32xx.c > index 5694eddade15..daae61e8c820 100644 > --- a/drivers/clocksource/time-lpc32xx.c > +++ b/drivers/clocksource/time-lpc32xx.c > @@ -18,6 +18,7 @@ > #include <linux/clk.h> > #include <linux/clockchips.h> > #include <linux/clocksource.h> > +#include <linux/delay.h> > #include <linux/interrupt.h> > #include <linux/irq.h> > #include <linux/kernel.h> > @@ -54,6 +55,15 @@ static u64 notrace lpc32xx_read_sched_clock(void) > return readl(clocksource_timer_counter); > } > > +static unsigned long lpc32xx_delay_timer_read(void) > +{ > + return readl(clocksource_timer_counter); > +} > + > +static struct delay_timer lpc32xx_delay_timer = { > + .read_current_timer = lpc32xx_delay_timer_read, > +}; > + > static int lpc32xx_clkevt_next_event(unsigned long delta, > struct clock_event_device *evtdev) > { > @@ -192,6 +202,8 @@ static int __init lpc32xx_clocksource_init(struct device_node *np) > } > > clocksource_timer_counter = base + LPC32XX_TIMER_TC; > + lpc32xx_delay_timer.freq = rate; > + register_current_timer_delay(&lpc32xx_delay_timer); > sched_clock_register(lpc32xx_read_sched_clock, 32, rate); > > return 0; Reviewed-by: Joachim Eastwood <manabian@gmail.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Boot tested on EA4357. regards, Joachim Eastwood
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 33db7406c0e2..c346be650892 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -160,6 +160,7 @@ config CLKSRC_EFM32 config CLKSRC_LPC32XX bool "Clocksource for LPC32XX" if COMPILE_TEST depends on GENERIC_CLOCKEVENTS && HAS_IOMEM + depends on ARM select CLKSRC_MMIO select CLKSRC_OF help diff --git a/drivers/clocksource/time-lpc32xx.c b/drivers/clocksource/time-lpc32xx.c index 5694eddade15..daae61e8c820 100644 --- a/drivers/clocksource/time-lpc32xx.c +++ b/drivers/clocksource/time-lpc32xx.c @@ -18,6 +18,7 @@ #include <linux/clk.h> #include <linux/clockchips.h> #include <linux/clocksource.h> +#include <linux/delay.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/kernel.h> @@ -54,6 +55,15 @@ static u64 notrace lpc32xx_read_sched_clock(void) return readl(clocksource_timer_counter); } +static unsigned long lpc32xx_delay_timer_read(void) +{ + return readl(clocksource_timer_counter); +} + +static struct delay_timer lpc32xx_delay_timer = { + .read_current_timer = lpc32xx_delay_timer_read, +}; + static int lpc32xx_clkevt_next_event(unsigned long delta, struct clock_event_device *evtdev) { @@ -192,6 +202,8 @@ static int __init lpc32xx_clocksource_init(struct device_node *np) } clocksource_timer_counter = base + LPC32XX_TIMER_TC; + lpc32xx_delay_timer.freq = rate; + register_current_timer_delay(&lpc32xx_delay_timer); sched_clock_register(lpc32xx_read_sched_clock, 32, rate); return 0;
This commit implements the ARM timer-based delay timer for the LPC32xx, LPC18xx, LPC43xx family of SoCs. Also, add a dependency to restrict compiling this driver for the ARM architecture. Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> --- drivers/clocksource/Kconfig | 1 + drivers/clocksource/time-lpc32xx.c | 12 ++++++++++++ 2 files changed, 13 insertions(+)