diff options
| author | Zixun LI <admin@hifiphile.com> | 2025-04-28 11:16:26 +0200 |
|---|---|---|
| committer | Eugen Hristev <eugen.hristev@linaro.org> | 2025-06-19 13:56:41 +0300 |
| commit | ac46b48d30c29a8a5f7ade07c666e12f88bfb169 (patch) | |
| tree | 80c9ecf6059595a34105d8d8cd72299982adc022 /drivers | |
| parent | c8bf2d686d45ff508e953d81c718e4dfd7d8ce62 (diff) | |
watchdog: at91sam9_wdt: Add SAM9X60 support
SAM9X60 has a slightly different watchdog implementation:
- Timer value moved into a new register WLR
- Some MR register fields have their position changed
This patch add SAM9X60 support, also adds a compatible
for SAMA5D4 which is the same as existing SAM9260.
Signed-off-by: Zixun LI <admin@hifiphile.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/watchdog/at91sam9_wdt.c | 39 |
1 files changed, 31 insertions, 8 deletions
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c index 5ca3e5a5fde..72e13787448 100644 --- a/drivers/watchdog/at91sam9_wdt.c +++ b/drivers/watchdog/at91sam9_wdt.c @@ -49,7 +49,7 @@ static int at91_wdt_start(struct udevice *dev, u64 timeout_ms, ulong flags) ticks = WDT_SEC2TICKS(timeout); /* Check if disabled */ - if (readl(wdt->regs + AT91_WDT_MR) & AT91_WDT_MR_WDDIS) { + if (readl(wdt->regs + AT91_WDT_MR) & wdt->wddis) { printf("sorry, watchdog is disabled\n"); return -1; } @@ -60,11 +60,21 @@ static int at91_wdt_start(struct udevice *dev, u64 timeout_ms, ulong flags) * Since WDV is a 12-bit counter, the maximum period is * 4096 / 256 = 16 seconds. */ - wdt->mr = AT91_WDT_MR_WDRSTEN /* causes watchdog reset */ - | AT91_WDT_MR_WDDBGHLT /* disabled in debug mode */ - | AT91_WDT_MR_WDD(0xfff) /* restart at any time */ - | AT91_WDT_MR_WDV(ticks); /* timer value */ - writel(wdt->mr, wdt->regs + AT91_WDT_MR); + + if (wdt->mode == AT91_WDT_MODE_SAM9260) { + wdt->mr = AT91_WDT_MR_WDRSTEN /* causes watchdog reset */ + | AT91_WDT_MR_WDDBGHLT /* disabled in debug mode */ + | AT91_WDT_MR_WDD(0xfff) /* restart at any time */ + | AT91_WDT_MR_WDV(ticks); /* timer value */ + writel(wdt->mr, wdt->regs + AT91_WDT_MR); + } else if (wdt->mode == AT91_WDT_MODE_SAM9X60) { + writel(AT91_SAM9X60_WLR_COUNTER(ticks), /* timer value */ + wdt->regs + AT91_SAM9X60_WLR); + + wdt->mr = AT91_SAM9X60_MR_PERIODRST /* causes watchdog reset */ + | AT91_SAM9X60_MR_WDDBGHLT; /* disabled in debug mode */ + writel(wdt->mr, wdt->regs + AT91_WDT_MR); + } return 0; } @@ -74,7 +84,7 @@ static int at91_wdt_stop(struct udevice *dev) struct at91_wdt_priv *wdt = dev_get_priv(dev); /* Disable Watchdog Timer */ - wdt->mr |= AT91_WDT_MR_WDDIS; + wdt->mr |= wdt->wddis; writel(wdt->mr, wdt->regs + AT91_WDT_MR); return 0; @@ -96,7 +106,14 @@ static const struct wdt_ops at91_wdt_ops = { }; static const struct udevice_id at91_wdt_ids[] = { - { .compatible = "atmel,at91sam9260-wdt" }, + { .compatible = "atmel,at91sam9260-wdt", + .data = AT91_WDT_MODE_SAM9260 }, + { .compatible = "atmel,sama5d4-wdt", + .data = AT91_WDT_MODE_SAM9260 }, + { .compatible = "microchip,sam9x60-wdt", + .data = AT91_WDT_MODE_SAM9X60 }, + { .compatible = "microchip,sama7g5-wdt", + .data = AT91_WDT_MODE_SAM9X60 }, {} }; @@ -108,6 +125,12 @@ static int at91_wdt_probe(struct udevice *dev) if (!wdt->regs) return -EINVAL; + wdt->mode = dev_get_driver_data(dev); + if (wdt->mode == AT91_WDT_MODE_SAM9260) + wdt->wddis = AT91_WDT_MR_WDDIS; + else if (wdt->mode == AT91_WDT_MODE_SAM9X60) + wdt->wddis = AT91_SAM9X60_MR_WDDIS; + debug("%s: Probing wdt%u\n", __func__, dev_seq(dev)); return 0; |