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// SPDX-License-Identifier: GPL-2.0+
/*
* dwc3-of-simple.c - OF glue layer for simple integrations
*
* Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com
*
* Author: Felipe Balbi <balbi@ti.com>
*
* Copyright (C) 2018 BayLibre, SAS
* Author: Neil Armstrong <narmstron@baylibre.com>
*/
#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <reset.h>
#include <clk.h>
struct dwc3_of_simple {
struct clk_bulk clks;
struct reset_ctl_bulk resets;
};
static int dwc3_of_simple_reset_init(struct udevice *dev,
struct dwc3_of_simple *simple)
{
int ret;
ret = reset_get_bulk(dev, &simple->resets);
if (ret == -ENOTSUPP)
return 0;
else if (ret)
return ret;
ret = reset_deassert_bulk(&simple->resets);
if (ret) {
reset_release_bulk(&simple->resets);
return ret;
}
return 0;
}
static int dwc3_of_simple_clk_init(struct udevice *dev,
struct dwc3_of_simple *simple)
{
int ret;
ret = clk_get_bulk(dev, &simple->clks);
if (ret == -ENOSYS)
return 0;
if (ret)
return ret;
#if CONFIG_IS_ENABLED(CLK)
ret = clk_enable_bulk(&simple->clks);
if (ret) {
clk_release_bulk(&simple->clks);
return ret;
}
#endif
return 0;
}
static int dwc3_of_simple_probe(struct udevice *dev)
{
struct dwc3_of_simple *simple = dev_get_platdata(dev);
int ret;
ret = dwc3_of_simple_clk_init(dev, simple);
if (ret)
return ret;
ret = dwc3_of_simple_reset_init(dev, simple);
if (ret)
return ret;
return 0;
}
static int dwc3_of_simple_remove(struct udevice *dev)
{
struct dwc3_of_simple *simple = dev_get_platdata(dev);
reset_release_bulk(&simple->resets);
clk_release_bulk(&simple->clks);
return dm_scan_fdt_dev(dev);
}
static const struct udevice_id dwc3_of_simple_ids[] = {
{ .compatible = "amlogic,meson-gxl-dwc3" },
{ .compatible = "ti,dwc3" },
{ }
};
U_BOOT_DRIVER(dwc3_of_simple) = {
.name = "dwc3-of-simple",
.id = UCLASS_SIMPLE_BUS,
.of_match = dwc3_of_simple_ids,
.probe = dwc3_of_simple_probe,
.remove = dwc3_of_simple_remove,
.platdata_auto_alloc_size = sizeof(struct dwc3_of_simple),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
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