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drivers: watchdog: rpi_pico: Add support for RP2350

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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>
This commit is contained in:
TOKITA Hiroshi 2024-09-02 23:54:56 +09:00 committed by Benjamin Cabé
parent 8d39008f2f
commit 9043e651ef
1 changed files with 11 additions and 1 deletions
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12
drivers/watchdog/wdt_rpi_pico.c
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@ -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;
}