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@@ -0,0 +1,97 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * Texas Instruments DRA7 reset driver
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+ *
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+ * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
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+ * Author: Keerthy <j-keerthy@ti.com>
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+ */
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+
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+#include <asm/io.h>
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+#include <common.h>
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+#include <dm.h>
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+#include <reset-uclass.h>
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+#include <dm/device_compat.h>
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+
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+struct dra7_reset_priv {
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+ u32 rstctrl;
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+ u32 rstst;
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+ u8 nreset;
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+};
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+
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+static int dra7_reset_request(struct reset_ctl *reset_ctl)
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+{
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+ return 0;
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+}
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+
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+static int dra7_reset_free(struct reset_ctl *reset_ctl)
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+{
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+ return 0;
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+}
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+
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+static inline void dra7_reset_rmw(u32 addr, u32 value, u32 mask)
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+{
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+ writel(((readl(addr) & (~mask)) | (value & mask)), addr);
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+}
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+
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+static int dra7_reset_deassert(struct reset_ctl *reset_ctl)
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+{
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+ struct dra7_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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+ int mask = 1 << reset_ctl->id;
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+
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+ if (reset_ctl->id < 0 || reset_ctl->id >= priv->nreset)
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+ return -EINVAL;
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+
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+ dra7_reset_rmw(priv->rstctrl, 0x0, mask);
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+
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+ while ((readl(priv->rstst) & mask) != mask)
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+ ;
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+
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+ return 0;
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+}
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+
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+static int dra7_reset_assert(struct reset_ctl *reset_ctl)
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+{
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+ struct dra7_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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+ int mask = 1 << reset_ctl->id;
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+
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+ if (reset_ctl->id < 0 || reset_ctl->id >= priv->nreset)
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+ return -EINVAL;
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+
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+ dra7_reset_rmw(priv->rstctrl, mask, 0x0);
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+
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+ return 0;
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+}
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+
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+struct reset_ops dra7_reset_ops = {
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+ .request = dra7_reset_request,
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+ .rfree = dra7_reset_free,
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+ .rst_assert = dra7_reset_assert,
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+ .rst_deassert = dra7_reset_deassert,
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+};
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+
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+static const struct udevice_id dra7_reset_ids[] = {
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+ { .compatible = "ti,dra7-reset" },
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+ { }
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+};
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+
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+static int dra7_reset_probe(struct udevice *dev)
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+{
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+ struct dra7_reset_priv *priv = dev_get_priv(dev);
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+
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+ priv->rstctrl = dev_read_addr(dev);
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+ priv->rstst = priv->rstctrl + 0x4;
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+ priv->nreset = dev_read_u32_default(dev, "ti,nresets", 1);
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+
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+ dev_info(dev, "dra7-reset successfully probed %s\n", dev->name);
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+
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+ return 0;
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+}
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+
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+U_BOOT_DRIVER(dra7_reset) = {
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+ .name = "dra7_reset",
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+ .id = UCLASS_RESET,
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+ .of_match = dra7_reset_ids,
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+ .probe = dra7_reset_probe,
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+ .ops = &dra7_reset_ops,
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+ .priv_auto = sizeof(struct dra7_reset_priv),
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+};
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