clocksource/drivers/timer-microchip-pit64b: Add delay timer

Add delay timer.

Signed-off-by: Claudiu Beznea <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Daniel Lezcano <[e-mail]>

drivers/clocksource/timer-microchip-pit64b.c

···
 
 #include <linux/clk.h>
 #include <linux/clockchips.h>
+#include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
···
 static void __iomem *mchp_pit64b_cs_base;
 /* Default cycles for clockevent timer. */
 static u64 mchp_pit64b_ce_cycles;
+/* Delay timer. */
+static struct delay_timer mchp_pit64b_dt;
 
 static inline u64 mchp_pit64b_cnt_read(void __iomem *base)
 {
···
 }
 
 static u64 notrace mchp_pit64b_sched_read_clk(void)
+{
+	return mchp_pit64b_cnt_read(mchp_pit64b_cs_base);
+}
+
+static unsigned long notrace mchp_pit64b_dt_read(void)
 {
 	return mchp_pit64b_cnt_read(mchp_pit64b_cs_base);
 }
···
 	}
 
 	sched_clock_register(mchp_pit64b_sched_read_clk, 64, clk_rate);
+
+	mchp_pit64b_dt.read_current_timer = mchp_pit64b_dt_read;
+	mchp_pit64b_dt.freq = clk_rate;
+	register_current_timer_delay(&mchp_pit64b_dt);
 
 	return 0;
 }