78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* SpacemiT reset controller driver - common implementation */
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#include <linux/container_of.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <soc/spacemit/ccu.h>
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#include "reset-spacemit-common.h"
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static int spacemit_reset_update(struct reset_controller_dev *rcdev,
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unsigned long id, bool assert)
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{
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struct ccu_reset_controller *controller;
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const struct ccu_reset_data *data;
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u32 mask;
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u32 val;
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controller = container_of(rcdev, struct ccu_reset_controller, rcdev);
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data = &controller->data->reset_data[id];
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mask = data->assert_mask | data->deassert_mask;
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val = assert ? data->assert_mask : data->deassert_mask;
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return regmap_update_bits(controller->regmap, data->offset, mask, val);
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}
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static int spacemit_reset_assert(struct reset_controller_dev *rcdev,
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unsigned long id)
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{
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return spacemit_reset_update(rcdev, id, true);
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}
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static int spacemit_reset_deassert(struct reset_controller_dev *rcdev,
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unsigned long id)
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{
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return spacemit_reset_update(rcdev, id, false);
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}
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static const struct reset_control_ops spacemit_reset_control_ops = {
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.assert = spacemit_reset_assert,
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.deassert = spacemit_reset_deassert,
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};
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static int spacemit_reset_controller_register(struct device *dev,
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struct ccu_reset_controller *controller)
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{
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struct reset_controller_dev *rcdev = &controller->rcdev;
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rcdev->ops = &spacemit_reset_control_ops;
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rcdev->owner = dev->driver->owner;
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rcdev->of_node = dev->of_node;
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rcdev->nr_resets = controller->data->count;
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return devm_reset_controller_register(dev, &controller->rcdev);
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}
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int spacemit_reset_probe(struct auxiliary_device *adev,
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const struct auxiliary_device_id *id)
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{
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struct spacemit_ccu_adev *rdev = to_spacemit_ccu_adev(adev);
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struct ccu_reset_controller *controller;
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struct device *dev = &adev->dev;
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controller = devm_kzalloc(dev, sizeof(*controller), GFP_KERNEL);
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if (!controller)
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return -ENOMEM;
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controller->data = (const struct ccu_reset_controller_data *)id->driver_data;
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controller->regmap = rdev->regmap;
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return spacemit_reset_controller_register(dev, controller);
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}
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EXPORT_SYMBOL_NS_GPL(spacemit_reset_probe, "RESET_SPACEMIT");
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MODULE_DESCRIPTION("SpacemiT reset controller driver - common code");
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MODULE_LICENSE("GPL");
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