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bad8a8afe1
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Acked-by: Steen Hegelund <Steen.Hegelund@microchip.com> Link: https://lore.kernel.org/r/20230714174939.4063667-1-robh@kernel.org Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2016-2017 Linaro Ltd.
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* Copyright (c) 2016-2017 HiSilicon Technologies Co., Ltd.
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*/
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#include <linux/kernel.h>
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/reset-controller.h>
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struct hi3660_reset_controller {
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struct reset_controller_dev rst;
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struct regmap *map;
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};
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#define to_hi3660_reset_controller(_rst) \
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container_of(_rst, struct hi3660_reset_controller, rst)
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static int hi3660_reset_program_hw(struct reset_controller_dev *rcdev,
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unsigned long idx, bool assert)
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{
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struct hi3660_reset_controller *rc = to_hi3660_reset_controller(rcdev);
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unsigned int offset = idx >> 8;
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unsigned int mask = BIT(idx & 0x1f);
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if (assert)
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return regmap_write(rc->map, offset, mask);
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else
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return regmap_write(rc->map, offset + 4, mask);
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}
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static int hi3660_reset_assert(struct reset_controller_dev *rcdev,
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unsigned long idx)
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{
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return hi3660_reset_program_hw(rcdev, idx, true);
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}
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static int hi3660_reset_deassert(struct reset_controller_dev *rcdev,
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unsigned long idx)
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{
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return hi3660_reset_program_hw(rcdev, idx, false);
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}
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static int hi3660_reset_dev(struct reset_controller_dev *rcdev,
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unsigned long idx)
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{
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int err;
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err = hi3660_reset_assert(rcdev, idx);
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if (err)
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return err;
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return hi3660_reset_deassert(rcdev, idx);
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}
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static const struct reset_control_ops hi3660_reset_ops = {
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.reset = hi3660_reset_dev,
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.assert = hi3660_reset_assert,
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.deassert = hi3660_reset_deassert,
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};
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static int hi3660_reset_xlate(struct reset_controller_dev *rcdev,
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const struct of_phandle_args *reset_spec)
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{
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unsigned int offset, bit;
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offset = reset_spec->args[0];
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bit = reset_spec->args[1];
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return (offset << 8) | bit;
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}
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static int hi3660_reset_probe(struct platform_device *pdev)
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{
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struct hi3660_reset_controller *rc;
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struct device_node *np = pdev->dev.of_node;
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struct device *dev = &pdev->dev;
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rc = devm_kzalloc(dev, sizeof(*rc), GFP_KERNEL);
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if (!rc)
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return -ENOMEM;
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rc->map = syscon_regmap_lookup_by_phandle(np, "hisilicon,rst-syscon");
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if (rc->map == ERR_PTR(-ENODEV)) {
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/* fall back to the deprecated compatible */
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rc->map = syscon_regmap_lookup_by_phandle(np,
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"hisi,rst-syscon");
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}
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if (IS_ERR(rc->map)) {
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dev_err(dev, "failed to get hisilicon,rst-syscon\n");
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return PTR_ERR(rc->map);
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}
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rc->rst.ops = &hi3660_reset_ops,
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rc->rst.of_node = np;
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rc->rst.of_reset_n_cells = 2;
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rc->rst.of_xlate = hi3660_reset_xlate;
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return reset_controller_register(&rc->rst);
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}
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static const struct of_device_id hi3660_reset_match[] = {
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{ .compatible = "hisilicon,hi3660-reset", },
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{},
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};
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MODULE_DEVICE_TABLE(of, hi3660_reset_match);
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static struct platform_driver hi3660_reset_driver = {
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.probe = hi3660_reset_probe,
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.driver = {
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.name = "hi3660-reset",
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.of_match_table = hi3660_reset_match,
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},
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};
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static int __init hi3660_reset_init(void)
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{
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return platform_driver_register(&hi3660_reset_driver);
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}
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arch_initcall(hi3660_reset_init);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:hi3660-reset");
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MODULE_DESCRIPTION("HiSilicon Hi3660 Reset Driver");
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