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lib: utils: Initialize miscellaneous drivers in one pass

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For driver subsystems that are not tightly integrated into the OpenSBI
init sequence, it is not important that the drivers are initialized in
any particular order. By putting all of these drivers in one array, they
can all be initialized with a single pass through the devicetree. This
saves about 10 ms of boot time on HiFive Unmatched.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Samuel Holland
2025-01-19 11:03:57 -08:00
committed by Anup Patel
parent e84ba96634
commit 434add551c
32 changed files with 39 additions and 254 deletions
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26
include/sbi_utils/cppc/fdt_cppc.h
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@@ -1,26 +0,0 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2024 Ventana Micro Systems Inc.
*
* Authors:
* Anup Patel <apatel@ventanamicro.com>
*/
#ifndef __FDT_CPPC_H__
#define __FDT_CPPC_H__
#include <sbi/sbi_types.h>
#include <sbi_utils/fdt/fdt_driver.h>
#ifdef CONFIG_FDT_CPPC
void fdt_cppc_init(const void *fdt);
#else
static inline void fdt_cppc_init(const void *fdt) { }
#endif
#endif

3
include/sbi_utils/fdt/fdt_driver.h
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@@ -18,6 +18,9 @@ struct fdt_driver {
bool experimental;
};
/* List of early FDT drivers generated at compile time */
extern const struct fdt_driver *const fdt_early_drivers[];
/**
* Initialize a driver instance for a specific DT node
*

26
include/sbi_utils/hsm/fdt_hsm.h
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@@ -1,26 +0,0 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2024 Ventana Micro Systems Inc.
*
* Authors:
* Anup Patel <apatel@ventanamicro.com>
*/
#ifndef __FDT_HSM_H__
#define __FDT_HSM_H__
#include <sbi/sbi_types.h>
#include <sbi_utils/fdt/fdt_driver.h>
#ifdef CONFIG_FDT_HSM
void fdt_hsm_init(const void *fdt);
#else
static inline void fdt_hsm_init(const void *fdt) { }
#endif
#endif

31
include/sbi_utils/reset/fdt_reset.h
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@@ -1,31 +0,0 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#ifndef __FDT_RESET_H__
#define __FDT_RESET_H__
#include <sbi/sbi_types.h>
#include <sbi_utils/fdt/fdt_driver.h>
#ifdef CONFIG_FDT_RESET
/**
* fdt_reset_init() - initialize reset drivers based on the device-tree
*
* This function shall be invoked in final init.
*/
void fdt_reset_init(const void *fdt);
#else
static inline void fdt_reset_init(const void *fdt) { }
#endif
#endif

26
include/sbi_utils/suspend/fdt_suspend.h
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@@ -1,26 +0,0 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2024 Ventana Micro Systems Inc.
*
* Authors:
* Anup Patel <apatel@ventanamicro.com>
*/
#ifndef __FDT_SUSPEND_H__
#define __FDT_SUSPEND_H__
#include <sbi/sbi_types.h>
#include <sbi_utils/fdt/fdt_driver.h>
#ifdef CONFIG_FDT_SUSPEND
void fdt_suspend_init(const void *fdt);
#else
static inline void fdt_suspend_init(const void *fdt) { }
#endif
#endif