add dts config

hc

2023-12-06 08f87f769b595151be1afeff53e144f543faa614

 kernel/drivers/watchdog/cpwd.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /* cpwd.c - driver implementation for hardware watchdog
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  * timers found on Sun Microsystems CP1400 and CP1500 boards.
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  *
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@@ -25,6 +26,7 @@
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 #include <linux/interrupt.h>
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 #include <linux/ioport.h>
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 #include <linux/timer.h>
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+#include <linux/compat.h>
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 #include <linux/slab.h>
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 #include <linux/mutex.h>
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 #include <linux/io.h>
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@@ -394,7 +396,7 @@
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 	mutex_unlock(&cpwd_mutex);
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-	return nonseekable_open(inode, f);
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+	return stream_open(inode, f);
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 }
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 static int cpwd_release(struct inode *inode, struct file *file)
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@@ -472,27 +474,9 @@
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 	return 0;
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 }
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-static long cpwd_compat_ioctl(struct file *file, unsigned int cmd,
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-			      unsigned long arg)
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+static long cpwd_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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 {
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-	int rval = -ENOIOCTLCMD;
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-
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-	switch (cmd) {
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-	/* solaris ioctls are specific to this driver */
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-	case WIOCSTART:
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-	case WIOCSTOP:
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-	case WIOCGSTAT:
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-		mutex_lock(&cpwd_mutex);
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-		rval = cpwd_ioctl(file, cmd, arg);
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-		mutex_unlock(&cpwd_mutex);
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-		break;
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-
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-	/* everything else is handled by the generic compat layer */
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-	default:
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-		break;
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-	}
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-
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-	return rval;
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+	return cpwd_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
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 }
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 static ssize_t cpwd_write(struct file *file, const char __user *buf,
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@@ -570,6 +554,8 @@
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 	if (str_prop)
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 		p->timeout = simple_strtoul(str_prop, NULL, 10);
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+	of_node_put(options);
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+
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 	/* CP1400s seem to have broken PLD implementations-- the
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 	 * interrupt_mask register cannot be written, so no timer
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 	 * interrupts can be masked within the PLD.