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)  *    Copyright IBM Corp. 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <asm/sclp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) static void sclp_early_write(struct console *con, const char *s, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	__sclp_early_printk(s, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static struct console sclp_early_console = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	.name  = "earlysclp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	.write = sclp_early_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	.flags = CON_PRINTBUFFER | CON_BOOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	.index = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static int __init setup_early_printk(char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	if (early_console)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	/* Accept only "earlyprintk" and "earlyprintk=sclp" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	if (buf && !str_has_prefix(buf, "sclp"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	if (!sclp.has_linemode && !sclp.has_vt220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	early_console = &sclp_early_console;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	register_console(early_console);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) early_param("earlyprintk", setup_early_printk);