[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/reset/reset-berlin.c b/src/kernel/linux/v4.14/drivers/reset/reset-berlin.c
new file mode 100644
index 0000000..371197b
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/reset/reset-berlin.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2014 Marvell Technology Group Ltd.
+ *
+ * Marvell Berlin reset driver
+ *
+ * Antoine Tenart <antoine.tenart@free-electrons.com>
+ * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/reset-controller.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#define BERLIN_MAX_RESETS 32
+
+#define to_berlin_reset_priv(p) \
+ container_of((p), struct berlin_reset_priv, rcdev)
+
+struct berlin_reset_priv {
+ struct regmap *regmap;
+ struct reset_controller_dev rcdev;
+};
+
+static int berlin_reset_reset(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct berlin_reset_priv *priv = to_berlin_reset_priv(rcdev);
+ int offset = id >> 8;
+ int mask = BIT(id & 0x1f);
+
+ regmap_write(priv->regmap, offset, mask);
+
+ /* let the reset be effective */
+ udelay(10);
+
+ return 0;
+}
+
+static const struct reset_control_ops berlin_reset_ops = {
+ .reset = berlin_reset_reset,
+};
+
+static int berlin_reset_xlate(struct reset_controller_dev *rcdev,
+ const struct of_phandle_args *reset_spec)
+{
+ unsigned offset, bit;
+
+ offset = reset_spec->args[0];
+ bit = reset_spec->args[1];
+
+ if (bit >= BERLIN_MAX_RESETS)
+ return -EINVAL;
+
+ return (offset << 8) | bit;
+}
+
+static int berlin2_reset_probe(struct platform_device *pdev)
+{
+ struct device_node *parent_np = of_get_parent(pdev->dev.of_node);
+ struct berlin_reset_priv *priv;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->regmap = syscon_node_to_regmap(parent_np);
+ of_node_put(parent_np);
+ if (IS_ERR(priv->regmap))
+ return PTR_ERR(priv->regmap);
+
+ priv->rcdev.owner = THIS_MODULE;
+ priv->rcdev.ops = &berlin_reset_ops;
+ priv->rcdev.of_node = pdev->dev.of_node;
+ priv->rcdev.of_reset_n_cells = 2;
+ priv->rcdev.of_xlate = berlin_reset_xlate;
+
+ return reset_controller_register(&priv->rcdev);
+}
+
+static const struct of_device_id berlin_reset_dt_match[] = {
+ { .compatible = "marvell,berlin2-reset" },
+ { },
+};
+
+static struct platform_driver berlin_reset_driver = {
+ .probe = berlin2_reset_probe,
+ .driver = {
+ .name = "berlin2-reset",
+ .of_match_table = berlin_reset_dt_match,
+ },
+};
+builtin_platform_driver(berlin_reset_driver);