linux-kernel - [PATCH 5.13 286/351] rtc: bd70528: fix BD71815 watchdog dependency

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Message-Id: <20210719144954.495231762@linuxfoundation.org>
Date:   Mon, 19 Jul 2021 16:53:52 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Guenter Roeck <linux@...ck-us.net>,
        Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Sasha Levin <sashal@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>
Subject: [PATCH 5.13 286/351] rtc: bd70528: fix BD71815 watchdog dependency

From: Arnd Bergmann <arnd@...db.de>

[ Upstream commit b0ddc5b170058a9ed3c9f031501d735a4eb8ee89 ]

The added Kconfig dependency is slightly incorrect, which can
lead to a link failure when the watchdog is a loadable module:

arm-linux-gnueabi-ld: drivers/rtc/rtc-bd70528.o: in function `bd70528_set_rtc_based_timers':
rtc-bd70528.c:(.text+0x6cc): undefined reference to `bd70528_wdt_set'
arm-linux-gnueabi-ld: drivers/rtc/rtc-bd70528.o: in function `bd70528_set_time':
rtc-bd70528.c:(.text+0xaa0): undefined reference to `bd70528_wdt_lock'
arm-linux-gnueabi-ld: rtc-bd70528.c:(.text+0xab8): undefined reference to `bd70528_wdt_unlock'
arm-linux-gnueabi-ld: drivers/rtc/rtc-bd70528.o: in function `bd70528_alm_enable':
rtc-bd70528.c:(.text+0xfc0): undefined reference to `bd70528_wdt_lock'
arm-linux-gnueabi-ld: rtc-bd70528.c:(.text+0x1030): undefined reference to `bd70528_wdt_unlock'

The problem is that it allows to be built-in if MFD_ROHM_BD71828
is built-in, even when the watchdog is a loadable module.

Rework this so that having the watchdog as a loadable module always
forces the rtc to be a module as well instead of built-in,
regardless of bd71828.

Fixes: c56dc069f268 ("rtc: bd70528: Support RTC on ROHM BD71815")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Reviewed-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Link: https://lore.kernel.org/r/20210422151545.2403356-1-arnd@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/rtc/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index d8c13fded164..914497abeef9 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -502,7 +502,8 @@ config RTC_DRV_M41T80_WDT
 
 config RTC_DRV_BD70528
 	tristate "ROHM BD70528, BD71815 and BD71828 PMIC RTC"
-	depends on MFD_ROHM_BD71828 || MFD_ROHM_BD70528 && (BD70528_WATCHDOG || !BD70528_WATCHDOG)
+	depends on MFD_ROHM_BD71828 || MFD_ROHM_BD70528
+	depends on BD70528_WATCHDOG || !BD70528_WATCHDOG
 	help
 	  If you say Y here you will get support for the RTC
 	  block on ROHM BD70528, BD71815 and BD71828 Power Management IC.
-- 
2.30.2