Add separate entry for Broadcom STB DPFE driver, selected by platforms
by default.  This allows further customization and compile testing.

Signed-off-by: Krzysztof Kozlowski <k...@kernel.org>
---

I have other changes around drivers/memory/Kconfig pending. Sending them
together would avoid conflicts.

---
 arch/arm/mach-bcm/Kconfig    |  1 +
 arch/arm64/Kconfig.platforms |  1 +
 drivers/memory/Kconfig       | 11 +++++++++++
 drivers/memory/Makefile      |  2 +-
 4 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index 1df0ee01ee02..b0c45238e69b 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -208,6 +208,7 @@ config ARCH_BRCMSTB
        select ARM_GIC
        select ARM_ERRATA_798181 if SMP
        select HAVE_ARM_ARCH_TIMER
+       select BRCMSTB_DPFE
        select BRCMSTB_L2_IRQ
        select BCM7120_L2_IRQ
        select ARCH_HAS_HOLES_MEMORYMODEL
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index ddc3bf75257f..f7791ed0ed6d 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -68,6 +68,7 @@ config ARCH_BRCMSTB
        bool "Broadcom Set-Top-Box SoCs"
        select ARCH_HAS_RESET_CONTROLLER
        select BCM7038_L1_IRQ
+       select BRCMSTB_DPFE
        select BRCMSTB_L2_IRQ
        select GENERIC_IRQ_CHIP
        select PINCTRL
diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig
index cd4fc93b50df..fef6f0873fda 100644
--- a/drivers/memory/Kconfig
+++ b/drivers/memory/Kconfig
@@ -54,6 +54,17 @@ config ATMEL_EBI
          tree is used. This bus supports NANDs, external ethernet controller,
          SRAMs, ATA devices, etc.
 
+config BRCMSTB_DPFE
+       bool "Broadcom STB DPFE driver" if COMPILE_TEST
+       depends on ARCH_BRCMSTB || COMPILE_TEST
+       help
+         This driver provides access to the DPFE interface of Broadcom
+         STB SoCs. The firmware running on the DCPU inside the DDR PHY can
+         provide current information about the system's RAM, for instance
+         the DRAM refresh rate. This can be used as an indirect indicator
+         for the DRAM's temperature. Slower refresh rate means cooler RAM,
+         higher refresh rate means hotter RAM.
+
 config BT1_L2_CTL
        bool "Baikal-T1 CM2 L2-RAM Cache Control Block"
        depends on MIPS_BAIKAL_T1 || COMPILE_TEST
diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile
index b4533ffff2bc..e71cf7b99641 100644
--- a/drivers/memory/Makefile
+++ b/drivers/memory/Makefile
@@ -10,7 +10,7 @@ endif
 obj-$(CONFIG_ARM_PL172_MPMC)   += pl172.o
 obj-$(CONFIG_ATMEL_SDRAMC)     += atmel-sdramc.o
 obj-$(CONFIG_ATMEL_EBI)                += atmel-ebi.o
-obj-$(CONFIG_ARCH_BRCMSTB)     += brcmstb_dpfe.o
+obj-$(CONFIG_BRCMSTB_DPFE)     += brcmstb_dpfe.o
 obj-$(CONFIG_BT1_L2_CTL)       += bt1-l2-ctl.o
 obj-$(CONFIG_TI_AEMIF)         += ti-aemif.o
 obj-$(CONFIG_TI_EMIF)          += emif.o
-- 
2.17.1

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