[PATCH v2 8/9] serial: 8250: add acpi_match
From: Aleksey Makarov <hidden>
Date: 2016-02-12 17:49:14
Also in:
linux-acpi, linux-serial, lkml
Subsystem:
8250/16?50 (and clone uarts) serial driver, the rest, tty layer and serial drivers · Maintainers:
Greg Kroah-Hartman, Linus Torvalds, Jiri Slaby
From: Mark Salter <redacted> Add an implementation of acpi_match() to the 8250 driver. It allows console to check if it matches the console specified by ACPI SPCR table. Signed-off-by: Mark Salter <redacted> Signed-off-by: Aleksey Makarov <redacted> --- drivers/tty/serial/8250/8250_core.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index 7775221..059338a 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c@@ -40,6 +40,7 @@ #ifdef CONFIG_SPARC #include <linux/sunserialcore.h> #endif +#include <linux/acpi.h> #include <asm/irq.h>
@@ -669,12 +670,34 @@ static int univ8250_console_match(struct console *co, char *name, int idx, return -ENODEV; } +static int __init univ8250_console_acpi_match(struct console *co, + struct acpi_table_spcr *spcr) +{ + int index = co->index >= 0 ? co->index : 0; + struct uart_port *port = &serial8250_ports[index].port; + + if (spcr->interface_type != ACPI_DBG2_16550_SUBSET && + spcr->interface_type != ACPI_DBG2_16550_COMPATIBLE) + return -ENODEV; + + if (spcr->serial_port.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY && + spcr->serial_port.address == (u64)port->mapbase) + return 0; + + if (spcr->serial_port.space_id == ACPI_ADR_SPACE_SYSTEM_IO && + spcr->serial_port.address == (u64)port->iobase) + return 0; + + return -ENODEV; +} + static struct console univ8250_console = { .name = "ttyS", .write = univ8250_console_write, .device = uart_console_device, .setup = univ8250_console_setup, .match = univ8250_console_match, + .acpi_match = univ8250_console_acpi_match, .flags = CON_PRINTBUFFER | CON_ANYTIME, .index = -1, .data = &serial8250_reg,
--
2.7.0