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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 2021 Xilinx, Inc. - Michal Simek
- */
- #define LOG_CATEGORY UCLASS_RESET
- #include <common.h>
- #include <dm.h>
- #include <dm/device_compat.h>
- #include <reset-uclass.h>
- #include <zynqmp_firmware.h>
- #define ZYNQMP_NR_RESETS (ZYNQMP_PM_RESET_END - ZYNQMP_PM_RESET_START)
- #define ZYNQMP_RESET_ID ZYNQMP_PM_RESET_START
- struct zynqmp_reset_priv {
- u32 reset_id;
- u32 nr_reset;
- };
- static int zynqmp_pm_reset_assert(const u32 reset,
- const enum zynqmp_pm_reset_action assert_flag)
- {
- return xilinx_pm_request(PM_RESET_ASSERT, reset, assert_flag, 0, 0,
- NULL);
- }
- static int zynqmp_reset_assert(struct reset_ctl *rst)
- {
- struct zynqmp_reset_priv *priv = dev_get_priv(rst->dev);
- dev_dbg(rst->dev, "%s(rst=%p) (id=%lu)\n", __func__, rst, rst->id);
- return zynqmp_pm_reset_assert(priv->reset_id + rst->id,
- PM_RESET_ACTION_ASSERT);
- }
- static int zynqmp_reset_deassert(struct reset_ctl *rst)
- {
- struct zynqmp_reset_priv *priv = dev_get_priv(rst->dev);
- dev_dbg(rst->dev, "%s(rst=%p) (id=%lu)\n", __func__, rst, rst->id);
- return zynqmp_pm_reset_assert(priv->reset_id + rst->id,
- PM_RESET_ACTION_RELEASE);
- }
- static int zynqmp_reset_request(struct reset_ctl *rst)
- {
- struct zynqmp_reset_priv *priv = dev_get_priv(rst->dev);
- dev_dbg(rst->dev, "%s(rst=%p) (id=%lu) (nr_reset=%d)\n", __func__,
- rst, rst->id, priv->nr_reset);
- if (rst->id > priv->nr_reset)
- return -EINVAL;
- return 0;
- }
- static int zynqmp_reset_free(struct reset_ctl *rst)
- {
- struct zynqmp_reset_priv *priv = dev_get_priv(rst->dev);
- dev_dbg(rst->dev, "%s(rst=%p) (id=%lu) (nr_reset=%d)\n", __func__,
- rst, rst->id, priv->nr_reset);
- return 0;
- }
- static int zynqmp_reset_probe(struct udevice *dev)
- {
- struct zynqmp_reset_priv *priv = dev_get_priv(dev);
- priv->reset_id = ZYNQMP_RESET_ID;
- priv->nr_reset = ZYNQMP_NR_RESETS;
- return 0;
- }
- const struct reset_ops zynqmp_reset_ops = {
- .request = zynqmp_reset_request,
- .rfree = zynqmp_reset_free,
- .rst_assert = zynqmp_reset_assert,
- .rst_deassert = zynqmp_reset_deassert,
- };
- static const struct udevice_id zynqmp_reset_ids[] = {
- { .compatible = "xlnx,zynqmp-reset" },
- { }
- };
- U_BOOT_DRIVER(zynqmp_reset) = {
- .name = "zynqmp_reset",
- .id = UCLASS_RESET,
- .of_match = zynqmp_reset_ids,
- .ops = &zynqmp_reset_ops,
- .probe = zynqmp_reset_probe,
- .priv_auto = sizeof(struct zynqmp_reset_priv),
- };
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