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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263/* SPDX-License-Identifier: GPL-2.0-only OR MIT *//* * Apple Silicon hardware tunable support * * Each tunable is a list with each entry containing a offset into the MMIO * region, a mask of bits to be cleared and a set of bits to be set. These * tunables are passed along by the previous boot stages and vary from device * to device such that they cannot be hardcoded in the individual drivers. * * Copyright (C) The Asahi Linux Contributors */
#ifndef _LINUX_SOC_APPLE_TUNABLE_H_#define _LINUX_SOC_APPLE_TUNABLE_H_
#include <linux/device.h>#include <linux/types.h>
/** * Struct to store an Apple Silicon hardware tunable. * * Each tunable is a list with each entry containing a offset into the MMIO * region, a mask of bits to be cleared and a set of bits to be set. These * tunables are passed along by the previous boot stages and vary from device * to device such that they cannot be hardcoded in the individual drivers. * * @param sz Number of [offset, mask, value] tuples stored in values. * @param values [offset, mask, value] array. */struct apple_tunable { size_t sz; struct { u32 offset; u32 mask; u32 value; } values[] __counted_by(sz);};
/** * Parse an array of hardware tunables from the device tree. * * @dev: Device node used for devm_kzalloc internally. * @np: Device node which contains the tunable array. * @name: Name of the device tree property which contains the tunables. * @res: Resource to which the tunables will be applied, used for bound checking * * @return: devres allocated struct on success or PTR_ERR on failure. */struct apple_tunable *devm_apple_tunable_parse(struct device *dev, struct device_node *np, const char *name, struct resource *res);
/** * Apply a previously loaded hardware tunable. * * @param regs: MMIO to which the tunable will be applied. * @param tunable: Pointer to the tunable. */void apple_tunable_apply(void __iomem *regs, struct apple_tunable *tunable);
#endif