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-rw-r--r--drivers/clk/qcom/reset.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/clk/qcom/reset.c b/drivers/clk/qcom/reset.c
new file mode 100644
index 000000000..e45e32804
--- /dev/null
+++ b/drivers/clk/qcom/reset.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/bitops.h>
+#include <linux/export.h>
+#include <linux/regmap.h>
+#include <linux/reset-controller.h>
+#include <linux/delay.h>
+
+#include "reset.h"
+
+static int qcom_reset(struct reset_controller_dev *rcdev, unsigned long id)
+{
+ struct qcom_reset_controller *rst = to_qcom_reset_controller(rcdev);
+
+ rcdev->ops->assert(rcdev, id);
+ fsleep(rst->reset_map[id].udelay ?: 1); /* use 1 us as default */
+
+ rcdev->ops->deassert(rcdev, id);
+ return 0;
+}
+
+static int
+qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
+{
+ struct qcom_reset_controller *rst;
+ const struct qcom_reset_map *map;
+ u32 mask;
+
+ rst = to_qcom_reset_controller(rcdev);
+ map = &rst->reset_map[id];
+ mask = map->bitmask ? map->bitmask : BIT(map->bit);
+
+ return regmap_update_bits(rst->regmap, map->reg, mask, mask);
+}
+
+static int
+qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
+{
+ struct qcom_reset_controller *rst;
+ const struct qcom_reset_map *map;
+ u32 mask;
+
+ rst = to_qcom_reset_controller(rcdev);
+ map = &rst->reset_map[id];
+ mask = map->bitmask ? map->bitmask : BIT(map->bit);
+
+ return regmap_update_bits(rst->regmap, map->reg, mask, 0);
+}
+
+const struct reset_control_ops qcom_reset_ops = {
+ .reset = qcom_reset,
+ .assert = qcom_reset_assert,
+ .deassert = qcom_reset_deassert,
+};
+EXPORT_SYMBOL_GPL(qcom_reset_ops);