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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 <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 = "rockchip,rk3399-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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