forked from Mirrors/opensbi
e931f387b2
The libfdt project does not have a generic API to parse phandle with args from a DT node so we add fdt_parse_phandle_with_args() for this purpose. This new API will be useful to FDT based drivers. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
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/*
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* fdt_helper.h - Flat Device Tree parsing helper routines
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* Implement helper routines to parse FDT nodes on top of
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* libfdt for OpenSBI usage
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*
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* Copyright (C) 2020 Bin Meng <bmeng.cn@gmail.com>
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*/
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#ifndef __FDT_HELPER_H__
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#define __FDT_HELPER_H__
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#include <sbi/sbi_types.h>
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struct fdt_match {
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const char *compatible;
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void *data;
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};
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#define FDT_MAX_PHANDLE_ARGS 16
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struct fdt_phandle_args {
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int node_offset;
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int args_count;
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u32 args[FDT_MAX_PHANDLE_ARGS];
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};
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struct platform_uart_data {
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unsigned long addr;
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unsigned long freq;
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unsigned long baud;
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unsigned long reg_shift;
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unsigned long reg_io_width;
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};
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const struct fdt_match *fdt_match_node(void *fdt, int nodeoff,
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const struct fdt_match *match_table);
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int fdt_find_match(void *fdt, int startoff,
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const struct fdt_match *match_table,
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const struct fdt_match **out_match);
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int fdt_parse_phandle_with_args(void *fdt, int nodeoff,
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const char *prop, const char *cells_prop,
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int index, struct fdt_phandle_args *out_args);
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int fdt_get_node_addr_size(void *fdt, int node, unsigned long *addr,
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unsigned long *size);
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int fdt_parse_hart_id(void *fdt, int cpu_offset, u32 *hartid);
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int fdt_parse_max_hart_id(void *fdt, u32 *max_hartid);
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int fdt_parse_gaisler_uart_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_shakti_uart_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_sifive_uart_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_uart8250_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_uart8250(void *fdt, struct platform_uart_data *uart,
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const char *compatible);
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struct plic_data;
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int fdt_parse_plic_node(void *fdt, int nodeoffset, struct plic_data *plic);
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int fdt_parse_plic(void *fdt, struct plic_data *plic, const char *compat);
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int fdt_parse_aclint_node(void *fdt, int nodeoffset, bool for_timer,
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unsigned long *out_addr, unsigned long *out_size,
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u32 *out_first_hartid, u32 *out_hart_count);
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int fdt_parse_compat_addr(void *fdt, unsigned long *addr,
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const char *compatible);
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#endif /* __FDT_HELPER_H__ */
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