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watchdog: aspeed: Support variable number of reset mask registers

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Starting from the AST2600 platform, the SoC design has become more
complex, with an increased number of reset mask registers.
To support this, introduce a new field 'num_reset_masks' in the
'aspeed_wdt_config' structure to specify the number of reset mask
registers per platform. This change removes the need for hardcoded
platform-specific logic and improves scalability for future SoCs.

Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Chin-Ting Kuo
2025-10-10 16:03:14 +08:00
committed by Wim Van Sebroeck
parent b3bc229b54
commit 0eb54296dc
1 changed files with 8 additions and 6 deletions
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14
drivers/watchdog/aspeed_wdt.c
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@@ -35,6 +35,7 @@ struct aspeed_wdt_config {
u32 irq_shift;
u32 irq_mask;
struct aspeed_wdt_scu scu;
u32 num_reset_masks;
};
struct aspeed_wdt {
@@ -66,6 +67,7 @@ static const struct aspeed_wdt_config ast2500_config = {
.wdt_reset_mask = 0x1,
.wdt_reset_mask_shift = 2,
},
.num_reset_masks = 1,
};
static const struct aspeed_wdt_config ast2600_config = {
@@ -78,6 +80,7 @@ static const struct aspeed_wdt_config ast2600_config = {
.wdt_reset_mask = 0xf,
.wdt_reset_mask_shift = 16,
},
.num_reset_masks = 2,
};
static const struct of_device_id aspeed_wdt_of_table[] = {
@@ -479,11 +482,11 @@ static int aspeed_wdt_probe(struct platform_device *pdev)
set_bit(WDOG_HW_RUNNING, &wdt->wdd.status);
}
if ((of_device_is_compatible(np, "aspeed,ast2500-wdt")) ||
(of_device_is_compatible(np, "aspeed,ast2600-wdt"))) {
if (!of_device_is_compatible(np, "aspeed,ast2400-wdt")) {
u32 reset_mask[2];
size_t nrstmask = of_device_is_compatible(np, "aspeed,ast2600-wdt") ? 2 : 1;
size_t nrstmask = wdt->cfg->num_reset_masks;
u32 reg = readl(wdt->base + WDT_RESET_WIDTH);
int i;
reg &= wdt->cfg->ext_pulse_width_mask;
if (of_property_read_bool(np, "aspeed,ext-active-high"))
@@ -503,9 +506,8 @@ static int aspeed_wdt_probe(struct platform_device *pdev)
ret = of_property_read_u32_array(np, "aspeed,reset-mask", reset_mask, nrstmask);
if (!ret) {
writel(reset_mask[0], wdt->base + WDT_RESET_MASK1);
if (nrstmask > 1)
writel(reset_mask[1], wdt->base + WDT_RESET_MASK2);
for (i = 0; i < nrstmask; i++)
writel(reset_mask[i], wdt->base + WDT_RESET_MASK1 + i * 4);
}
}