The pinctrl_ich6 driver is currently unconditionally built for all
x86 boards. Let's use a Kconfig option to control the build.

Signed-off-by: Bin Meng <bmeng...@gmail.com>
---

 arch/x86/Kconfig               | 6 ++++++
 arch/x86/cpu/baytrail/Kconfig  | 1 +
 arch/x86/cpu/ivybridge/Kconfig | 1 +
 arch/x86/lib/Makefile          | 2 +-
 4 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c145799..460aed6 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -744,6 +744,12 @@ config I8259_PIC
          slave) interrupt controllers. Include this to have U-Boot set up
          the interrupt correctly.
 
+config PINCTRL_ICH6
+       bool
+       help
+         Intel ICH6 compatible chipset pinctrl driver. It needs to work
+         together with the ICH6 compatible gpio driver.
+
 config I8254_TIMER
        bool
        default y
diff --git a/arch/x86/cpu/baytrail/Kconfig b/arch/x86/cpu/baytrail/Kconfig
index ac58b03..022a9f2 100644
--- a/arch/x86/cpu/baytrail/Kconfig
+++ b/arch/x86/cpu/baytrail/Kconfig
@@ -12,6 +12,7 @@ config INTEL_BAYTRAIL
        imply AHCI_PCI
        imply ICH_SPI
        imply INTEL_ICH6_GPIO
+       imply PINCTRL_ICH6
        imply MMC
        imply MMC_PCI
        imply MMC_SDHCI
diff --git a/arch/x86/cpu/ivybridge/Kconfig b/arch/x86/cpu/ivybridge/Kconfig
index e31c33c..ea25ff3 100644
--- a/arch/x86/cpu/ivybridge/Kconfig
+++ b/arch/x86/cpu/ivybridge/Kconfig
@@ -13,6 +13,7 @@ config NORTHBRIDGE_INTEL_IVYBRIDGE
        imply AHCI_PCI
        imply ICH_SPI
        imply INTEL_ICH6_GPIO
+       imply PINCTRL_ICH6
        imply SCSI
        imply SCSI_AHCI
        imply SPI_FLASH
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 51d451f..2adb236 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -24,7 +24,7 @@ obj-$(CONFIG_ENABLE_MRC_CACHE) += mrccache.o
 obj-y  += northbridge-uclass.o
 obj-$(CONFIG_I8259_PIC) += i8259.o
 obj-$(CONFIG_I8254_TIMER) += i8254.o
-obj-y  += pinctrl_ich6.o
+obj-$(CONFIG_PINCTRL_ICH6) += pinctrl_ich6.o
 obj-y  += pirq_routing.o
 obj-y  += relocate.o
 obj-y += physmem.o
-- 
2.7.4

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