slimbus: Add Qualcomm Slimbus driver

Signed-off-by: David Brown <davidb@codeaurora.org>

Documentation/devicetree/bindings/slimbus/slim-msm-ctrl.txt

@@ -0,0 +1,38 @@
+Qualcomm SLIMBUS controller
+
+Required properties:
+
+ - reg : Offset and length of the register region(s) for the device
+ - reg-names : Register region name(s) referenced in reg above
+	 Required register resource entries are:
+	 "slimbus_physical": Physical adderss of controller register blocks
+	 "slimbus_bam_physical": Physical address of Bus Access Module (BAM)
+				 for this controller
+ - compatible : should be "qcom,slim-msm"
+ - cell-index : SLIMBUS number used for this controller
+ - interrupts : Interrupt numbers used by this controller
+ - interrupt-names : Required interrupt resource entries are:
+	"slimbus_irq" : Interrupt for SLIMBUS core
+	"slimbus_bam_irq" : Interrupt for controller core's BAM
+
+Optional property:
+ - reg entry for slew rate : If slew rate control register is provided, this
+	 entry should be used.
+ - reg-name for slew rate: "slimbus_slew_reg"
+ - qcom,min-clk-gear : Minimum clock gear at which this controller can be run
+		 (range: 1-10)
+		 Default value will be 1 if this entry is not specified
+ - qcom,max-clk-gear: Maximum clock gear at which this controller can be run
+		 (range: 1-10)
+		 Default value will be 10 if this entry is not specified
+Example:
+	slim@fe12f000 {
+		cell-index = <1>;
+		compatible = "qcom,slim-msm";
+		reg = <0xfe12f000 0x35000>,
+		      <0xfe104000 0x20000>;
+		reg-names = "slimbus_physical", "slimbus_bam_physical";
+		interrupts = <0 163 0 0 164 0>;
+		interrupt-names = "slimbus_irq", "slimbus_bam_irq";
+		qcom,min-clk-gear = <10>;
+	};

drivers/Kconfig

@@ -50,6 +50,8 @@ source "drivers/i2c/Kconfig"
 
 source "drivers/spi/Kconfig"
 
+source "drivers/slimbus/Kconfig"
+
 source "drivers/hsi/Kconfig"
 
 source "drivers/pps/Kconfig"

drivers/Makefile

@@ -53,6 +53,7 @@ obj-$(CONFIG_ATA)		+= ata/
 obj-$(CONFIG_TARGET_CORE)	+= target/
 obj-$(CONFIG_MTD)		+= mtd/
 obj-$(CONFIG_SPI)		+= spi/
+obj-$(CONFIG_SLIMBUS)		+= slimbus/
 obj-y				+= hsi/
 obj-y				+= net/
 obj-$(CONFIG_ATM)		+= atm/

drivers/slimbus/Kconfig

@@ -0,0 +1,19 @@
+#
+# SLIMBUS driver configuration
+#
+menuconfig SLIMBUS
+	bool "Slimbus support"
+	depends on HAS_IOMEM
+	help
+	  Slimbus is standard interface between baseband and
+	  application processors and peripheral components in mobile
+	  terminals.
+
+if SLIMBUS
+config SLIMBUS_MSM_CTRL
+	tristate "Qualcomm Slimbus Master Component"
+	default n
+	help
+	  Select driver for Qualcomm's Slimbus Master Component.
+
+endif

drivers/slimbus/Makefile

@@ -0,0 +1,5 @@
+#
+# Makefile for kernel slimbus framework.
+#
+obj-$(CONFIG_SLIMBUS)			+= slimbus.o
+obj-$(CONFIG_SLIMBUS_MSM_CTRL)		+= slim-msm-ctrl.o