threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/*
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* Copyright (C) 2019 MediaTek Inc.
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* Licensed under either
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* BSD Licence, (see NOTICE for more details)
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* GNU General Public License, version 2.0, (see NOTICE for more details)
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*/
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#include <linux/of_fdt.h>
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#include <linux/module.h>
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static u64 mntl_base;
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static u64 mntl_size;
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static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname,
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int depth, void *data)
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{
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static int found;
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const __be32 *reg, *endp;
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int l;
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if (!found && depth == 1 && strcmp(uname, "reserved-memory") == 0) {
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found = 1;
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/* scan next node */
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return 0;
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} else if (!found) {
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/* scan next node */
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return 0;
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} else if (found && depth < 2) {
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/* scanning of /reserved-memory has been finished */
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return 1;
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}
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if (!strstr(uname, "KOBuffer"))
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return 0;
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reg = of_get_flat_dt_prop(node, "reg", &l);
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if (reg == NULL)
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return 0;
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endp = reg + (l / sizeof(__be32));
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while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
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mntl_base = dt_mem_next_cell(dt_root_addr_cells, ®);
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mntl_size = dt_mem_next_cell(dt_root_size_cells, ®);
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}
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return 0;
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}
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static int __init init_fdt_mntl_buf(void)
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{
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of_scan_flat_dt(__fdt_scan_reserved_mem, NULL);
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return 0;
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}
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early_initcall(init_fdt_mntl_buf);
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int get_mntl_buf(u64 *base, u64 *size)
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{
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*base = mntl_base;
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*size = mntl_size;
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return 0;
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}
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