[PATCH] clocksource: select CLKSRC_MMIO where needed

[Arnd Bergmann]

The Tegra clocksource implementation uses the clocksource_mmio helper
functions, but currently can be configured without them, which fails:

drivers/clocksource/built-in.o: In function `tegra20_init_timer':
:(.init.text+0xac): undefined reference to `clocksource_mmio_init'
:(.init.text+0x140): undefined reference to `clocksource_mmio_readl_up'

The same problem exists for Digicolor:

drivers/clocksource/built-in.o: In function `digicolor_timer_init':
:(.init.text+0xfa): undefined reference to `clocksource_mmio_init'
:(.init.text+0x14c): undefined reference to `clocksource_mmio_readl_down'

I've inspected the Kconfig file to look for other cases that I have not
yet run into, and added an explicit 'select' to each one to ensure we
can successfully link the drivers.

Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
 drivers/clocksource/Kconfig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 56777f04d2d9..f70b4f3b4857 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -30,6 +30,7 @@ config CLKSRC_MMIO
 config DIGICOLOR_TIMER
        bool "Digicolor timer driver" if COMPILE_TEST
        depends on GENERIC_CLOCKEVENTS
+       select CLKSRC_MMIO
        help
          Enables the support for the digicolor timer driver.
 
@@ -55,6 +56,7 @@ config ARMADA_370_XP_TIMER
        bool "Armada 370 and XP timer driver" if COMPILE_TEST
        depends on ARM
        select CLKSRC_OF
+       select CLKSRC_MMIO
        help
          Enables the support for the Armada 370 and XP timer driver.
 
@@ -89,6 +91,7 @@ config SUN5I_HSTIMER
 
 config TEGRA_TIMER
        bool "Tegra timer driver" if COMPILE_TEST
+       select CLKSRC_MMIO
        depends on ARM
        help
          Enables support for the Tegra driver.
@@ -263,6 +266,7 @@ config FSL_FTM_TIMER
 
 config VF_PIT_TIMER
        bool
+       select CLKSRC_MMIO
        help
          Support for Period Interrupt Timer on Freescale Vybrid Family SoCs.
 
@@ -394,6 +398,7 @@ config CLKSRC_ST_LPC
        bool "Low power clocksource found in the LPC" if COMPILE_TEST
        select CLKSRC_OF if OF
        depends on HAS_IOMEM
+       select CLKSRC_MMIO
        help
          Enable this option to use the Low Power controller timer
          as clocksource.
-- 
2.7.0