atheros[ar2315-wdt]: update interrupt handling

Acknowledge watchdog interrupt in arch irq dispatcher and remove odd
watchdog enable call from probe function.

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41687 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/atheros/patches-3.10/100-board.patch

@@ -2134,7 +2134,7 @@
 +
 --- /dev/null
 +++ b/arch/mips/ar231x/ar2315.c
-@@ -0,0 +1,623 @@
+@@ -0,0 +1,624 @@
 +/*
 + * This file is subject to the terms and conditions of the GNU General Public
 + * License.  See the file "COPYING" in the main directory of this archive
@@ -2234,9 +2234,10 @@
 +			ar2315_gpio_irq();
 +		else if (misc_intr & AR2315_ISR_UART0)
 +			do_IRQ(AR531X_MISC_IRQ_UART0);
-+		else if (misc_intr & AR2315_ISR_WD)
++		else if (misc_intr & AR2315_ISR_WD) {
++			ar231x_write_reg(AR2315_ISR, AR2315_ISR_WD);
 +			do_IRQ(AR531X_MISC_IRQ_WATCHDOG);
-+		else
++		} else
 +			do_IRQ(AR531X_MISC_IRQ_NONE);
 +	} else if (pending & CAUSEF_IP7)
 +		do_IRQ(AR531X_IRQ_CPU_CLOCK);

target/linux/atheros/patches-3.10/130-watchdog.patch

@@ -1,6 +1,6 @@
 --- /dev/null
 +++ b/drivers/watchdog/ar2315-wtd.c
-@@ -0,0 +1,189 @@
+@@ -0,0 +1,186 @@
 +/*
 + * This program is free software; you can redistribute it and/or modify
 + * it under the terms of the GNU General Public License as published by
@@ -52,7 +52,6 @@
 +ar2315_wdt_enable(void)
 +{
 +	ar231x_write_reg(AR2315_WD, wdt_timeout * CLOCK_RATE);
-+	ar231x_write_reg(AR2315_ISR, 0x80);
 +}
 +
 +static ssize_t
@@ -92,7 +91,6 @@
 +	} else {
 +		ar231x_write_reg(AR2315_WDC, 0);
 +		ar231x_write_reg(AR2315_WD, 0);
-+		ar231x_write_reg(AR2315_ISR, 0x80);
 +	}
 +	return IRQ_HANDLED;
 +}
@@ -151,7 +149,6 @@
 +{
 +	int ret = 0;
 +
-+	ar2315_wdt_enable();
 +	ret = request_irq(AR531X_MISC_IRQ_WATCHDOG, ar2315_wdt_interrupt,
 +			  IRQF_DISABLED, DRIVER_NAME, dev);
 +	if (ret) {