mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-13 06:42:56 +00:00
a41c33992a
Enable zynqmp reset driver for Versal NET. Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com> Signed-off-by: Michal Simek <michal.simek@amd.com> Link: https://lore.kernel.org/r/c8c26618f87d8451c6ffa9487809a24718bff6a7.1663589964.git.michal.simek@amd.com
94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
// 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 (priv->nr_reset && rst->id > priv->nr_reset)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int zynqmp_reset_probe(struct udevice *dev)
|
|
{
|
|
struct zynqmp_reset_priv *priv = dev_get_priv(dev);
|
|
|
|
if (device_is_compatible(dev, "xlnx,zynqmp-reset")) {
|
|
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,
|
|
.rst_assert = zynqmp_reset_assert,
|
|
.rst_deassert = zynqmp_reset_deassert,
|
|
};
|
|
|
|
static const struct udevice_id zynqmp_reset_ids[] = {
|
|
{ .compatible = "xlnx,zynqmp-reset" },
|
|
{ .compatible = "xlnx,versal-reset" },
|
|
{ .compatible = "xlnx,versal-net-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),
|
|
};
|