Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Based on reduced version of METAG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of_fdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/mach_desc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #ifdef CONFIG_SERIAL_EARLYCON
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static unsigned int __initdata arc_base_baud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) unsigned int __init arc_early_base_baud(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	return arc_base_baud/16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static void __init arc_set_early_base_baud(unsigned long dt_root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	if (of_flat_dt_is_compatible(dt_root, "abilis,arc-tb10x"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		arc_base_baud = 166666666;	/* Fixed 166.6MHz clk (TB10x) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	else if (of_flat_dt_is_compatible(dt_root, "snps,arc-sdp") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		 of_flat_dt_is_compatible(dt_root, "snps,hsdk"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		arc_base_baud = 33333333;	/* Fixed 33MHz clk (AXS10x & HSDK) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		arc_base_baud = 50000000;	/* Fixed default 50MHz */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define arc_set_early_base_baud(dt_root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static const void * __init arch_get_next_mach(const char *const **match)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	static const struct machine_desc *mdesc = __arch_info_begin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	const struct machine_desc *m = mdesc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	if (m >= __arch_info_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	mdesc++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	*match = m->dt_compat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	return m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)  * setup_machine_fdt - Machine setup when an dtb was passed to the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)  * @dt:		virtual address pointer to dt blob
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)  * If a dtb was passed to the kernel, then use it to choose the correct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)  * machine_desc and to setup the system.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) const struct machine_desc * __init setup_machine_fdt(void *dt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	const struct machine_desc *mdesc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	unsigned long dt_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	if (!early_init_dt_scan(dt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	mdesc = of_flat_dt_match_machine(NULL, arch_get_next_mach);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	if (!mdesc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 		machine_halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	dt_root = of_get_flat_dt_root();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	arc_set_early_base_baud(dt_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	return mdesc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }