|
@@ -0,0 +1,82 @@
|
|
|
+// SPDX-License-Identifier: GPL-2.0
|
|
|
+/*
|
|
|
+ * Copyright (C) 2019 MediaTek Inc. All Rights Reserved.
|
|
|
+ *
|
|
|
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
|
|
|
+ */
|
|
|
+
|
|
|
+#include <common.h>
|
|
|
+#include <dm.h>
|
|
|
+#include <errno.h>
|
|
|
+#include <reset-uclass.h>
|
|
|
+#include <linux/io.h>
|
|
|
+
|
|
|
+struct mtmips_reset_priv {
|
|
|
+ void __iomem *base;
|
|
|
+};
|
|
|
+
|
|
|
+static int mtmips_reset_request(struct reset_ctl *reset_ctl)
|
|
|
+{
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int mtmips_reset_free(struct reset_ctl *reset_ctl)
|
|
|
+{
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int mtmips_reset_assert(struct reset_ctl *reset_ctl)
|
|
|
+{
|
|
|
+ struct mtmips_reset_priv *priv = dev_get_priv(reset_ctl->dev);
|
|
|
+
|
|
|
+ setbits_32(priv->base, BIT(reset_ctl->id));
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int mtmips_reset_deassert(struct reset_ctl *reset_ctl)
|
|
|
+{
|
|
|
+ struct mtmips_reset_priv *priv = dev_get_priv(reset_ctl->dev);
|
|
|
+
|
|
|
+ clrbits_32(priv->base, BIT(reset_ctl->id));
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct reset_ops mtmips_reset_ops = {
|
|
|
+ .request = mtmips_reset_request,
|
|
|
+ .free = mtmips_reset_free,
|
|
|
+ .rst_assert = mtmips_reset_assert,
|
|
|
+ .rst_deassert = mtmips_reset_deassert,
|
|
|
+};
|
|
|
+
|
|
|
+static int mtmips_reset_probe(struct udevice *dev)
|
|
|
+{
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int mtmips_reset_ofdata_to_platdata(struct udevice *dev)
|
|
|
+{
|
|
|
+ struct mtmips_reset_priv *priv = dev_get_priv(dev);
|
|
|
+
|
|
|
+ priv->base = (void __iomem *)dev_remap_addr_index(dev, 0);
|
|
|
+ if (!priv->base)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct udevice_id mtmips_reset_ids[] = {
|
|
|
+ { .compatible = "mediatek,mtmips-reset" },
|
|
|
+ { }
|
|
|
+};
|
|
|
+
|
|
|
+U_BOOT_DRIVER(mtmips_reset) = {
|
|
|
+ .name = "mtmips-reset",
|
|
|
+ .id = UCLASS_RESET,
|
|
|
+ .of_match = mtmips_reset_ids,
|
|
|
+ .ofdata_to_platdata = mtmips_reset_ofdata_to_platdata,
|
|
|
+ .probe = mtmips_reset_probe,
|
|
|
+ .priv_auto_alloc_size = sizeof(struct mtmips_reset_priv),
|
|
|
+ .ops = &mtmips_reset_ops,
|
|
|
+};
|