Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Gemini Device Tree boot support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <asm/mach/arch.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/mach/map.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/system_misc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/proc-fns.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #ifdef CONFIG_DEBUG_GEMINI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) /* This is needed for LL-debug/earlyprintk/debug-macro.S */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static struct map_desc gemini_io_desc[] __initdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		.virtual = CONFIG_DEBUG_UART_VIRT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		.pfn = __phys_to_pfn(CONFIG_DEBUG_UART_PHYS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		.length = SZ_4K,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		.type = MT_DEVICE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	},
^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 gemini_map_io(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	iotable_init(gemini_io_desc, ARRAY_SIZE(gemini_io_desc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define gemini_map_io NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static void gemini_idle(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	 * Because of broken hardware we have to enable interrupts or the CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	 * will never wakeup... Acctualy it is not very good to enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	 * interrupts first since scheduler can miss a tick, but there is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	 * no other way around this. Platforms that needs it for power saving
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	 * should enable it in init code, since by default it is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	 * disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	/* FIXME: Enabling interrupts here is racy! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	cpu_do_idle();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static void __init gemini_init_machine(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	arm_pm_idle = gemini_idle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static const char *gemini_board_compat[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	"cortina,gemini",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) DT_MACHINE_START(GEMINI_DT, "Gemini (Device Tree)")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	.map_io		= gemini_map_io,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	.init_machine	= gemini_init_machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	.dt_compat	= gemini_board_compat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) MACHINE_END