linux-kernel - [PATCH 7/7] serial: allow COMPILE

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Date:   Thu, 21 Apr 2022 12:17:08 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     gregkh@...uxfoundation.org
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 7/7] serial: allow COMPILE_TEST for some drivers

Some more serial drivers can be compile-tested under certain
circumstances (when building a specific architecture). So allow for
that.

This reduces the need of zillion mach/subarch-specific configs. And
since the 0day bot has only allmodconfig's for some archs, this
increases build coverage there too.

Note that cpm needs a minor update in the header, so that it drags in
at least some defines (CPM2 ones).

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/tty/serial/Kconfig             | 6 +++---
 drivers/tty/serial/cpm_uart/cpm_uart.h | 2 ++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 20cb103972fa..2d3eed53b43e 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -782,7 +782,7 @@ config SERIAL_PMACZILOG_CONSOLE
 
 config SERIAL_CPM
 	tristate "CPM SCC/SMC serial port support"
-	depends on CPM2 || CPM1
+	depends on CPM2 || CPM1 || (PPC32 && COMPILE_TEST)
 	select SERIAL_CORE
 	help
 	  This driver supports the SCC and SMC serial ports on Motorola 
@@ -806,7 +806,7 @@ config SERIAL_CPM_CONSOLE
 
 config SERIAL_PIC32
 	tristate "Microchip PIC32 serial support"
-	depends on MACH_PIC32
+	depends on MACH_PIC32 || (MIPS && COMPILE_TEST)
 	select SERIAL_CORE
 	help
 	  If you have a PIC32, this driver supports the serial ports.
@@ -1246,7 +1246,7 @@ config SERIAL_XILINX_PS_UART_CONSOLE
 
 config SERIAL_AR933X
 	tristate "AR933X serial port support"
-	depends on HAVE_CLK && ATH79
+	depends on (HAVE_CLK && ATH79) || (MIPS && COMPILE_TEST)
 	select SERIAL_CORE
 	select SERIAL_MCTRL_GPIO if GPIOLIB
 	help
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart.h b/drivers/tty/serial/cpm_uart/cpm_uart.h
index 6113b953ce25..8c582779cf22 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart.h
+++ b/drivers/tty/serial/cpm_uart/cpm_uart.h
@@ -19,6 +19,8 @@ struct gpio_desc;
 #include "cpm_uart_cpm2.h"
 #elif defined(CONFIG_CPM1)
 #include "cpm_uart_cpm1.h"
+#elif defined(CONFIG_COMPILE_TEST)
+#include "cpm_uart_cpm2.h"
 #endif
 
 #define SERIAL_CPM_MAJOR	204
-- 
2.36.0