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From:   Arnd Bergmann <arnd@arndb.de>
To:     Benson Leung <bleung@chromium.org>,
        Enric Balletbo i Serra <enric.balletbo@collabora.com>
Cc:     Arnd Bergmann <arnd@arndb.de>, Duncan Laurie <dlaurie@google.com>,
        Nick Crews <ncrews@chromium.org>,
        Wei Yongjun <weiyongjun1@huawei.com>,
        linux-kernel@vger.kernel.org
Subject: [PATCH] platform/chrome: fix wilco-ec dependencies
Date:   Mon,  4 Mar 2019 21:06:51 +0100
Message-Id: <20190304200719.1382717-1-arnd@arndb.de>
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Sender: linux-kernel-owner@vger.kernel.org
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When CROS_EC_LPC is set to =m, we get a link failure for a
builtin wilco-ec module:

drivers/platform/chrome/wilco_ec/core.o: In function `wilco_ec_remove':
core.c:(.text+0x26): undefined reference to `cros_ec_lpc_mec_destroy'
drivers/platform/chrome/wilco_ec/core.o: In function `wilco_ec_probe':
core.c:(.text+0x18c): undefined reference to `cros_ec_lpc_mec_init'
core.c:(.text+0x224): undefined reference to `cros_ec_lpc_mec_destroy'
drivers/platform/chrome/wilco_ec/mailbox.o: In function `wilco_ec_mailbox':
mailbox.c:(.text+0x104): undefined reference to `cros_ec_lpc_io_bytes_mec'

The problem with the existing CROS_EC_LPC_MEC dependency is that this
is only for a 'bool' symbol, so the information about the exported
functions being in a module is lost on the way, and we actually have
to depend on both CROS_EC_LPC and CROS_EC_LPC_MEC.

Fixes: 7b3d4f44abf0 ("platform/chrome: Add new driver for Wilco EC")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/platform/chrome/wilco_ec/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/chrome/wilco_ec/Kconfig b/drivers/platform/chrome/wilco_ec/Kconfig
index 4a119ced4d0c..e09e4cebe9b4 100644
--- a/drivers/platform/chrome/wilco_ec/Kconfig
+++ b/drivers/platform/chrome/wilco_ec/Kconfig
@@ -1,6 +1,6 @@
 config WILCO_EC
 	tristate "ChromeOS Wilco Embedded Controller"
-	depends on ACPI && X86 && CROS_EC_LPC_MEC
+	depends on ACPI && X86 && CROS_EC_LPC && CROS_EC_LPC_MEC
 	help
 	  If you say Y here, you get support for talking to the ChromeOS
 	  Wilco EC over an eSPI bus. This uses a simple byte-level protocol
-- 
2.20.0