samples: drivers: counter: alarm: add support for pit64b1

Add support for pit64b1 counter device.

Signed-off-by: CHEN Xing <[email protected]>

Author: MCHP-MPU-Solutions-SHA

samples/drivers/counter/alarm/sample.yaml

@@ -29,6 +29,7 @@ tests:
       - nrf54l15dk/nrf54l15/cpuflpr
       - nrf54lm20dk/nrf54lm20a/cpuapp
       - nrf9160dk/nrf9160
+      - sama7g54_ek
       - samd20_xpro
       - bl5340_dvk/nrf5340/cpuapp
       - gd32e103v_eval

samples/drivers/counter/alarm/src/main.c

@@ -75,6 +75,10 @@ struct counter_alarm_cfg alarm_cfg;
 #define TIMER DT_NODELABEL(rtc0)
 #elif defined(CONFIG_COUNTER_RENESAS_RZ_CMTW)
 #define TIMER DT_INST(0, renesas_rz_cmtw_counter)
+#elif defined(CONFIG_COUNTER_MCHP_SAM_PIT64B)
+#define TIMER DT_NODELABEL(pit64b1)
+#undef ALARM_FLAGS
+#define ALARM_FLAGS COUNTER_ALARM_CFG_ABSOLUTE
 #else
 #error Unable to find a counter device node in devicetree
 #endif