Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / watchdog / s5p_wdt.c

diff --git a/qemu/roms/u-boot/drivers/watchdog/s5p_wdt.c b/qemu/roms/u-boot/drivers/watchdog/s5p_wdt.c
new file mode 100644 (file)
index 0000000..a6e54d9
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/watchdog/s5p_wdt.c
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ * Minkyu Kang <mk7.kang@samsung.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/watchdog.h>
+
+#define PRESCALER_VAL 255
+
+void wdt_stop(void)
+{
+       struct s5p_watchdog *wdt =
+               (struct s5p_watchdog *)samsung_get_base_watchdog();
+       unsigned int wtcon;
+
+       wtcon = readl(&wdt->wtcon);
+       wtcon &= ~(WTCON_EN | WTCON_INT | WTCON_RESET);
+
+       writel(wtcon, &wdt->wtcon);
+}
+
+void wdt_start(unsigned int timeout)
+{
+       struct s5p_watchdog *wdt =
+               (struct s5p_watchdog *)samsung_get_base_watchdog();
+       unsigned int wtcon;
+
+       wdt_stop();
+
+       wtcon = readl(&wdt->wtcon);
+       wtcon |= (WTCON_EN | WTCON_CLK(WTCON_CLK_128));
+       wtcon &= ~WTCON_INT;
+       wtcon |= WTCON_RESET;
+       wtcon |= WTCON_PRESCALER(PRESCALER_VAL);
+
+       writel(timeout, &wdt->wtdat);
+       writel(timeout, &wdt->wtcnt);
+       writel(wtcon, &wdt->wtcon);
+}