ARM: vexpress: refine dependencies for new code

The versatile express changes for 3.16 introduced a number of
build regressions for randconfig kernels by not tracking dependencies
between the components right.

This patch tries to rectify that:

* the mach-vexpress code cannot link without the syscfg driver,
  which in turn needs MFD_VEXPRESS_SYSREG
* various drivers call devm_regmap_init_vexpress_config(), which
  has to be exported so it can be used by loadable modules
* the configuration bus uses OF DT helper functions that are not
  available to platforms disable CONFIG_OF
* The sysreg driver exports GPIOs through gpiolib, which can
  be disabled on some platforms.
* The clocksource code cannot be built on platforms that don't
  use modern timekeeping but rely on gettimeoffset.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/arm/mach-vexpress/Kconfig b/arch/arm/mach-vexpress/Kconfig
index 657d52d..b8ac752 100644 (file)
--- a/arch/arm/mach-vexpress/Kconfig
+++ b/arch/arm/mach-vexpress/Kconfig
@@ -18,6 +18,8 @@ config ARCH_VEXPRESS
        select POWER_SUPPLY
        select REGULATOR_FIXED_VOLTAGE if REGULATOR
        select VEXPRESS_CONFIG
+       select VEXPRESS_SYSCFG
+       select MFD_VEXPRESS_SYSREG
        help
          This option enables support for systems using Cortex processor based
          ARM core and logic (FPGA) tiles on the Versatile Express motherboard,

diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index f24e79d..2863427 100644 (file)
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -46,6 +46,7 @@ config VEXPRESS_CONFIG
        bool "Versatile Express configuration bus"
        default y if ARCH_VEXPRESS
        depends on ARM || ARM64
+       depends on OF
        select REGMAP
        help
          Platform configuration infrastructure for the ARM Ltd.

diff --git a/drivers/bus/vexpress-config.c b/drivers/bus/vexpress-config.c
index 27a07df..a64763b 100644 (file)
--- a/drivers/bus/vexpress-config.c
+++ b/drivers/bus/vexpress-config.c
@@ -118,7 +118,7 @@ struct regmap *devm_regmap_init_vexpress_config(struct device *dev)
 
        return regmap;
 }
-
+EXPORT_SYMBOL_GPL(devm_regmap_init_vexpress_config);
 
 struct device *vexpress_config_bridge_register(struct device *parent,
                struct vexpress_config_bridge_ops *ops, void *context)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 2c27b02..43f1acf 100644 (file)
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -194,7 +194,7 @@ config CLKSRC_QCOM
 
 config CLKSRC_VERSATILE
        bool "ARM Versatile (Express) reference platforms clock source"
-       depends on GENERIC_SCHED_CLOCK
+       depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
        select CLKSRC_OF
        default y if MFD_VEXPRESS_SYSREG
        help

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 490fd48..f04ac62 100644 (file)
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1229,7 +1229,7 @@ endmenu
 
 config MFD_VEXPRESS_SYSREG
        bool "Versatile Express System Registers"
-       depends on VEXPRESS_CONFIG
+       depends on VEXPRESS_CONFIG && GPIOLIB
        default y
        select CLKSRC_MMIO
        select GPIO_GENERIC_PLATFORM