bus: qcom: add EBI2 driver

This adds a driver for the Qualcomm External Bus Interface EBI2 found in the MSM8660 and APQ8060 SoCs (at least). This was tested with the SMSC9112 ethernet on the APQ8060 Dragonboard sitting on top of the SLOW CS2. Some of my understanding if very vague and based on guesses and extrapolations: the documentation in APQ8060 Qualcomm Application Processor User Guide 80-N7150-14 Rev. A describes select features but does not document the register bit fields. Signed-off-by: Linus Walleij <[email protected]>
kyagi · Sep 8, 2016 · 335a127 · 335a127
1 parent 7e525b7
commit 335a127
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diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
@@ -108,6 +108,13 @@ config OMAP_OCP2SCP
 	  OCP2SCP and in OMAP5, both USB PHY and SATA PHY is connected via
 	  OCP2SCP.
 
+config QCOM_EBI2
+	bool "Qualcomm External Bus Interface 2 (EBI2)"
+	help
+	  Say y here to enable support for the Qualcomm External Bus
+	  Interface 2, which can be used to connect things like NAND Flash,
+	  SRAM, ethernet adapters, FPGAs and LCD displays.
+
 config SIMPLE_PM_BUS
 	bool "Simple Power-Managed Bus Driver"
 	depends on OF && PM

diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_MVEBU_MBUS) 	+= mvebu-mbus.o
 obj-$(CONFIG_OMAP_INTERCONNECT)	+= omap_l3_smx.o omap_l3_noc.o
 
 obj-$(CONFIG_OMAP_OCP2SCP)	+= omap-ocp2scp.o
+obj-$(CONFIG_QCOM_EBI2)		+= qcom-ebi2.o
 obj-$(CONFIG_SUNXI_RSB)		+= sunxi-rsb.o
 obj-$(CONFIG_SIMPLE_PM_BUS)	+= simple-pm-bus.o
 obj-$(CONFIG_TEGRA_ACONNECT)	+= tegra-aconnect.o