x86: Allow removal of standard PCH drivers

These drivers are not needed on all platforms. While they are small, it
is useful in TPL to drop then. Add Kconfig control to allow this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/drivers/pch/Kconfig b/drivers/pch/Kconfig
index 18f006d..c49a928 100644 (file)
--- a/drivers/pch/Kconfig
+++ b/drivers/pch/Kconfig
@@ -7,3 +7,21 @@ config PCH
          northbridge / southbridge architecture that was previously used. The
          PCH allows for higher performance since the memory functions are
          handled in the CPU.
+
+config X86_PCH7
+       bool "Add support for Intel PCH7"
+       default y if X86
+       help
+         Enable this if your SoC uses Platform Controller Hub 7 (PCH7). This
+         dates from about 2011 and is used on baytrail, for example. The
+         PCH provides access to the GPIO and SPI base addresses, among other
+         functions.
+
+config X86_PCH9
+       bool "Add support for Intel PCH9"
+       default y if X86
+       help
+         Enable this if your SoC uses Platform Controller Hub 9 (PCH9). This
+         dates from about 2015 and is used on baytrail, for example. The
+         PCH provides access to the GPIO and SPI base addresses, among other
+         functions.

diff --git a/drivers/pch/Makefile b/drivers/pch/Makefile
index 8ea6b78..d5de3e4 100644 (file)
--- a/drivers/pch/Makefile
+++ b/drivers/pch/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0+
 
 obj-y += pch-uclass.o
-obj-y += pch7.o
-obj-y += pch9.o
+obj-$(CONFIG_X86_PCH7) += pch7.o
+obj-$(CONFIG_X86_PCH9) += pch9.o
 obj-$(CONFIG_SANDBOX) += sandbox_pch.o