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drivers: watchdog: Add support for Apollo3 SoCs watchdog

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This commit adds support for the watchdog which
can be found in Apollo3 SoCs

Signed-off-by: Hao Luo <hluo@ambiq.com>
This commit is contained in:
Hao Luo 2023-12-21 16:17:19 +08:00 • committed by Anas Nashif
commit 35aae8b5c1
5 changed files with 42 additions and 3 deletions
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4
boards/ambiq/apollo3_evb/apollo3_evb.dts
View file

@ -91,6 +91,10 @@
status = "okay";
};
&wdt0 {
status = "okay";
};
&gpio0_31 {
status = "okay";
};

1
boards/ambiq/apollo3_evb/apollo3_evb.yaml
View file

@ -9,6 +9,7 @@ toolchain:
- gnuarmemb
supported:
- uart
- watchdog
- gpio
testing:
ignore_tags:

4
boards/ambiq/apollo3p_evb/apollo3p_evb.dts
View file

@ -91,6 +91,10 @@
status = "okay";
};
&wdt0 {
status = "okay";
};
&gpio0_31 {
status = "okay";
};

1
boards/ambiq/apollo3p_evb/apollo3p_evb.yaml
View file

@ -9,6 +9,7 @@ toolchain:
- gnuarmemb
supported:
- uart
- watchdog
- gpio
testing:
ignore_tags:

35
drivers/watchdog/wdt_ambiq.c
View file

@ -35,10 +35,13 @@ static void wdt_ambiq_isr(void *arg)
const struct device *dev = (const struct device *)arg;
struct wdt_ambiq_data *data = dev->data;
#if defined(CONFIG_SOC_SERIES_APOLLO3X)
am_hal_wdt_int_clear();
#else
uint32_t status;
am_hal_wdt_interrupt_status_get(AM_HAL_WDT_MCU, &status, false);
am_hal_wdt_interrupt_clear(AM_HAL_WDT_MCU, status);
#endif
if (data->callback) {
data->callback(dev, 0);
@ -51,6 +54,25 @@ static int wdt_ambiq_setup(const struct device *dev, uint8_t options)
struct wdt_ambiq_data *data = dev->data;
am_hal_wdt_config_t cfg;
#if defined(CONFIG_SOC_SERIES_APOLLO3X)
uint32_t ui32ClockSource = AM_HAL_WDT_LFRC_CLK_DEFAULT;
if (dev_cfg->clk_freq == 128) {
ui32ClockSource = AM_HAL_WDT_LFRC_CLK_128HZ;
} else if (dev_cfg->clk_freq == 16) {
ui32ClockSource = AM_HAL_WDT_LFRC_CLK_16HZ;
} else if (dev_cfg->clk_freq == 1) {
ui32ClockSource = AM_HAL_WDT_LFRC_CLK_1HZ;
}
cfg.ui32Config = ui32ClockSource | _VAL2FLD(WDT_CFG_RESEN, data->reset) |
AM_HAL_WDT_ENABLE_INTERRUPT;
cfg.ui16InterruptCount = data->timeout;
cfg.ui16ResetCount = data->timeout;
am_hal_clkgen_control(AM_HAL_CLKGEN_CONTROL_LFRC_START, 0);
am_hal_wdt_init(&cfg);
am_hal_wdt_int_enable();
am_hal_wdt_start();
#else
if (dev_cfg->clk_freq == 128) {
cfg.eClockSource = AM_HAL_WDT_128HZ;
} else if (dev_cfg->clk_freq == 16) {
@ -68,7 +90,7 @@ static int wdt_ambiq_setup(const struct device *dev, uint8_t options)
am_hal_wdt_config(AM_HAL_WDT_MCU, &cfg);
am_hal_wdt_interrupt_enable(AM_HAL_WDT_MCU, AM_HAL_WDT_INTERRUPT_MCU);
am_hal_wdt_start(AM_HAL_WDT_MCU, false);
#endif
return 0;
}
@ -76,8 +98,11 @@ static int wdt_ambiq_disable(const struct device *dev)
{
ARG_UNUSED(dev);
#if defined(CONFIG_SOC_SERIES_APOLLO3X)
am_hal_wdt_halt();
#else
am_hal_wdt_stop(AM_HAL_WDT_MCU);
#endif
return 0;
}
@ -114,7 +139,11 @@ static int wdt_ambiq_feed(const struct device *dev, int channel_id)
ARG_UNUSED(dev);
ARG_UNUSED(channel_id);
#if defined(CONFIG_SOC_SERIES_APOLLO3X)
am_hal_wdt_restart();
#else
am_hal_wdt_restart(AM_HAL_WDT_MCU);
#endif
LOG_DBG("Fed the watchdog");
return 0;