[v3,4/5] serial: 8250/ingenic: fix building with SERIAL_8250=m

Message ID 1455721357-4008289-5-git-send-email-arnd@arndb.de
State Accepted
Commit 7d774fb8ca8c8686413ce847dc74473cc6196e7d
Headers show
  • serial: 8250: fixes for modular build
Related show

Commit Message

Arnd Bergmann Feb. 17, 2016, 3:02 p.m.
The Ingenic 8250 driver has a 'bool' Kconfig symbol, but that
breaks when SERIAL_8250 is a loadable module:

drivers/tty/built-in.o: In function `ingenic_uart_probe':
8250_ingenic.c:(.text+0x1c1a0): undefined reference to `serial8250_register_8250_port'

This changes the symbol to a 'tristate', plus a dependency on
SERIAL_8250, which makes it work again. Unlike the other
soc-specific backends, this one has no dependency on an
architecture or a platform. I'm adding a dependency on
MIPS || COMPILE_TEST as well here, to avoid showing the driver
on architectures that are not interested in it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

 drivers/tty/serial/8250/8250_ingenic.c | 2 +-
 drivers/tty/serial/8250/Kconfig        | 7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)


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diff --git a/drivers/tty/serial/8250/8250_ingenic.c b/drivers/tty/serial/8250/8250_ingenic.c
index 97b78558caed..b0677f610863 100644
--- a/drivers/tty/serial/8250/8250_ingenic.c
+++ b/drivers/tty/serial/8250/8250_ingenic.c
@@ -48,7 +48,7 @@  static const struct of_device_id of_match[];
 #define UART_MCR_MDCE	BIT(7)
 #define UART_MCR_FCM	BIT(6)
+#if defined(CONFIG_SERIAL_EARLYCON) && !defined(MODULE)
 static struct earlycon_device *early_device;
 static uint8_t __init early_in(struct uart_port *port, int offset)
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index 67ad6b0d595b..1b0638511ac1 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -384,9 +384,10 @@  config SERIAL_8250_UNIPHIER
 	  serial ports, say Y to this option. If unsure, say N.
 config SERIAL_8250_INGENIC
-	bool "Support for Ingenic SoC serial ports"
-	depends on OF_FLATTREE
-	select LIBFDT
+	tristate "Support for Ingenic SoC serial ports"
+	depends on SERIAL_8250
+	depends on MIPS || COMPILE_TEST
 	  If you have a system using an Ingenic SoC and wish to make use of
 	  its UARTs, say Y to this option. If unsure, say N.