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38276090ee
The disabled clk API returns -ENOSYS unlike the reset API returning -ENOTSUPP.
Fixes: ca7fdc8b12 ("usb: host: Add simple of glue driver for DWC3 USB Controllers integration")
Reported-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
111 lines
2.1 KiB
C
111 lines
2.1 KiB
C
/*
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* dwc3-of-simple.c - OF glue layer for simple integrations
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*
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* Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com
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*
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* Author: Felipe Balbi <balbi@ti.com>
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*
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* Copyright (C) 2018 BayLibre, SAS
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* Author: Neil Armstrong <narmstron@baylibre.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <fdtdec.h>
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#include <reset.h>
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#include <clk.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct dwc3_of_simple {
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struct clk_bulk clks;
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struct reset_ctl_bulk resets;
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};
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static int dwc3_of_simple_reset_init(struct udevice *dev,
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struct dwc3_of_simple *simple)
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{
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int ret;
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ret = reset_get_bulk(dev, &simple->resets);
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if (ret == -ENOTSUPP)
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return 0;
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else if (ret)
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return ret;
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ret = reset_deassert_bulk(&simple->resets);
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if (ret) {
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reset_release_bulk(&simple->resets);
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return ret;
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}
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return 0;
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}
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static int dwc3_of_simple_clk_init(struct udevice *dev,
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struct dwc3_of_simple *simple)
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{
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int ret;
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ret = clk_get_bulk(dev, &simple->clks);
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if (ret == -ENOSYS)
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return 0;
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if (ret)
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return ret;
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#if CONFIG_IS_ENABLED(CLK)
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ret = clk_enable_bulk(&simple->clks);
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if (ret) {
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clk_release_bulk(&simple->clks);
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return ret;
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}
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#endif
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return 0;
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}
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static int dwc3_of_simple_probe(struct udevice *dev)
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{
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struct dwc3_of_simple *simple = dev_get_platdata(dev);
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int ret;
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ret = dwc3_of_simple_clk_init(dev, simple);
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if (ret)
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return ret;
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ret = dwc3_of_simple_reset_init(dev, simple);
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if (ret)
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return ret;
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return 0;
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}
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static int dwc3_of_simple_remove(struct udevice *dev)
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{
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struct dwc3_of_simple *simple = dev_get_platdata(dev);
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reset_release_bulk(&simple->resets);
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clk_release_bulk(&simple->clks);
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return dm_scan_fdt_dev(dev);
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}
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static const struct udevice_id dwc3_of_simple_ids[] = {
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{ .compatible = "amlogic,meson-gxl-dwc3" },
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{ .compatible = "ti,dwc3" },
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{ }
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};
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U_BOOT_DRIVER(dwc3_of_simple) = {
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.name = "dwc3-of-simple",
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.id = UCLASS_SIMPLE_BUS,
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.of_match = dwc3_of_simple_ids,
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.probe = dwc3_of_simple_probe,
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.remove = dwc3_of_simple_remove,
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.platdata_auto_alloc_size = sizeof(struct dwc3_of_simple),
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.flags = DM_FLAG_ALLOC_PRIV_DMA,
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};
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