drivers: watchdog: rpi_pico: Add support for RP2350

The watchdog register configuration of RP2350 differs from that
of RP2040, so we make fit that.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>
Signed-off-by: Andrew Featherstone <andrew.featherstone@gmail.com>

drivers/watchdog/wdt_rpi_pico.c

@@ -7,6 +7,7 @@
 #define DT_DRV_COMPAT raspberrypi_pico_watchdog
 
 #include <hardware/watchdog.h>
+#include <hardware/ticks.h>
 #include <hardware/structs/psm.h>
 #include <zephyr/drivers/clock_control.h>
 #include <zephyr/drivers/watchdog.h>
@@ -15,9 +16,13 @@
 #include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(wdt_rpi_pico, CONFIG_WDT_LOG_LEVEL);
 
+#ifdef CONFIG_SOC_RP2040
 /* Maximum watchdog time is halved due to errata RP2040-E1 */
-#define RPI_PICO_MAX_WDT_TIME (0xffffff / 2)
 #define RPI_PICO_WDT_TIME_MULTIPLICATION_FACTOR 2
+#else
+#define RPI_PICO_WDT_TIME_MULTIPLICATION_FACTOR 1
+#endif
+#define RPI_PICO_MAX_WDT_TIME (0xffffff / RPI_PICO_WDT_TIME_MULTIPLICATION_FACTOR)
 
 /* Watchdog requires a 1MHz clock source, divided from the crystal oscillator */
 #define RPI_PICO_CLK_REF_FREQ_WDT_TICK_DIVISOR 1000000
@@ -89,8 +94,13 @@ static int wdt_rpi_pico_setup(const struct device *dev, uint8_t options)
 		return err;
 	}
 
+#ifdef CONFIG_SOC_RP2040
 	watchdog_hw->tick = (ref_clk / RPI_PICO_CLK_REF_FREQ_WDT_TICK_DIVISOR) |
 			    WATCHDOG_TICK_ENABLE_BITS;
+#else
+	ticks_hw->ticks[TICK_WATCHDOG].cycles = ref_clk / RPI_PICO_CLK_REF_FREQ_WDT_TICK_DIVISOR;
+	ticks_hw->ticks[TICK_WATCHDOG].ctrl = TICKS_WATCHDOG_CTRL_ENABLE_BITS;
+#endif
 
 	return 0;
 }