Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 75 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/watchdog/mpc8xx_wdt.c b/roms/u-boot/drivers/watchdog/mpc8xx_wdt.c
new file mode 100644
index 000000000..c8b104d8f
--- /dev/null
+++ b/roms/u-boot/drivers/watchdog/mpc8xx_wdt.c
@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2017 CS Systemes d'Information
+ */
+
+#include <common.h>
+#include <env.h>
+#include <dm.h>
+#include <wdt.h>
+#include <mpc8xx.h>
+#include <asm/cpm_8xx.h>
+#include <asm/io.h>
+
+void hw_watchdog_reset(void)
+{
+	immap_t __iomem *immap = (immap_t __iomem *)CONFIG_SYS_IMMR;
+
+	out_be16(&immap->im_siu_conf.sc_swsr, 0x556c);	/* write magic1 */
+	out_be16(&immap->im_siu_conf.sc_swsr, 0xaa39);	/* write magic2 */
+}
+
+static int mpc8xx_wdt_start(struct udevice *dev, u64 timeout, ulong flags)
+{
+	immap_t __iomem *immap = (immap_t __iomem *)CONFIG_SYS_IMMR;
+	u32 val = CONFIG_SYS_SYPCR;
+	const char *mode = env_get("watchdog_mode");
+
+	if (strcmp(mode, "off") == 0)
+		val = val & ~(SYPCR_SWE | SYPCR_SWRI);
+	else if (strcmp(mode, "nmi") == 0)
+		val = (val & ~SYPCR_SWRI) | SYPCR_SWE;
+
+	out_be32(&immap->im_siu_conf.sc_sypcr, val);
+
+	if (!(in_be32(&immap->im_siu_conf.sc_sypcr) & SYPCR_SWE))
+		return -EBUSY;
+	return 0;
+
+}
+
+static int mpc8xx_wdt_stop(struct udevice *dev)
+{
+	immap_t __iomem *immap = (immap_t __iomem *)CONFIG_SYS_IMMR;
+
+	out_be32(&immap->im_siu_conf.sc_sypcr, CONFIG_SYS_SYPCR & ~SYPCR_SWE);
+
+	if (in_be32(&immap->im_siu_conf.sc_sypcr) & SYPCR_SWE)
+		return -EBUSY;
+	return 0;
+}
+
+static int mpc8xx_wdt_reset(struct udevice *dev)
+{
+	hw_watchdog_reset();
+
+	return 0;
+}
+
+static const struct wdt_ops mpc8xx_wdt_ops = {
+	.start = mpc8xx_wdt_start,
+	.reset = mpc8xx_wdt_reset,
+	.stop = mpc8xx_wdt_stop,
+};
+
+static const struct udevice_id mpc8xx_wdt_ids[] = {
+	{ .compatible = "fsl,pq1-wdt" },
+	{}
+};
+
+U_BOOT_DRIVER(wdt_mpc8xx) = {
+	.name = "wdt_mpc8xx",
+	.id = UCLASS_WDT,
+	.of_match = mpc8xx_wdt_ids,
+	.ops = &mpc8xx_wdt_ops,
+};