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watchdog: rti_wdt: Use of_reserved_mem_region_to_resource() for "memory-region"

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Use the newly added of_reserved_mem_region_to_resource() function to
handle "memory-region" properties.

The error handling is a bit different. "memory-region" is optional, so
failed lookup is not an error. But then an error in
of_address_to_resource() is treated as an error. However, that
distinction is not really important. Either the region is available
and usable or it is not. So now, it is just
of_reserved_mem_region_to_resource() which is checked for an error.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20250703183518.2075108-1-robh@kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Rob Herring (Arm)
2025-07-03 13:35:18 -05:00
committed by Wim Van Sebroeck
parent 0987760b27
commit 3b3643e1cd
1 changed files with 3 additions and 11 deletions
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14
drivers/watchdog/rti_wdt.c
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@@ -15,7 +15,7 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/types.h>
@@ -214,7 +214,6 @@ static int rti_wdt_probe(struct platform_device *pdev)
struct rti_wdt_device *wdt;
struct clk *clk;
u32 last_ping = 0;
struct device_node *node;
u32 reserved_mem_size;
struct resource res;
u32 *vaddr;
@@ -299,15 +298,8 @@ static int rti_wdt_probe(struct platform_device *pdev)
}
}
node = of_parse_phandle(pdev->dev.of_node, "memory-region", 0);
if (node) {
ret = of_address_to_resource(node, 0, &res);
of_node_put(node);
if (ret) {
dev_err(dev, "No memory address assigned to the region.\n");
goto err_iomap;
}
ret = of_reserved_mem_region_to_resource(pdev->dev.of_node, 0, &res);
if (!ret) {
/*
* If reserved memory is defined for watchdog reset cause.
* Readout the Power-on(PON) reason and pass to bootstatus.