From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Thu, 5 Jun 2014 23:24:12 +0200 Subject: [PATCH 1/3] mfd: UCB1x00: enable modular build In-Reply-To: <1402003454-1989084-1-git-send-email-arnd@arndb.de> References: <1402003454-1989084-1-git-send-email-arnd@arndb.de> Message-ID: <1402003454-1989084-2-git-send-email-arnd@arndb.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The UCB1200 / UCB1300 driver uses the MCP_SA11X0 driver, which can be a loadable module, but this results in a link error when UCB1200 itself is built-in: drivers/built-in.o: In function `ucb1x00_io_set_dir': :(.text+0x4a364): undefined reference to `mcp_reg_write' drivers/built-in.o: In function `ucb1x00_io_write': :(.text+0x4a3dc): undefined reference to `mcp_reg_write' drivers/built-in.o: In function `ucb1x00_io_read': :(.text+0x4a400): undefined reference to `mcp_reg_read' drivers/built-in.o: In function `ucb1x00_adc_enable': :(.text+0x4a460): undefined reference to `mcp_enable' ... This can easily be resolved by making CONFIG_MCP_UCB1200 itself a tristate option, since that causes Kconfig to track the dependency correctly. Signed-off-by: Arnd Bergmann --- drivers/mfd/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index ee8204c..4370692 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1248,7 +1248,7 @@ config MCP_SA11X0 # Chip drivers config MCP_UCB1200 - bool "Support for UCB1200 / UCB1300" + tristate "Support for UCB1200 / UCB1300" depends on MCP_SA11X0 select MCP -- 1.8.3.2