uio: uio_fsl_elbc_gpcm: new driver

This driver provides UIO access to memory of a peripheral connected
to the Freescale enhanced local bus controller (eLBC) interface
using the general purpose chip-select mode (GPCM).
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/powerpc/fsl/lbc.txt

@@ -16,20 +16,28 @@ Example:
 			   "fsl,pq2-localbus";
 		#address-cells = <2>;
 		#size-cells = <1>;
-		reg = <f0010100 40>;
+		reg = <0xf0010100 0x40>;
 
-		ranges = <0 0 fe000000 02000000
-			  1 0 f4500000 00008000>;
+		ranges = <0x0 0x0 0xfe000000 0x02000000
+			  0x1 0x0 0xf4500000 0x00008000
+			  0x2 0x0 0xfd810000 0x00010000>;
 
 		flash@0,0 {
 			compatible = "jedec-flash";
-			reg = <0 0 2000000>;
+			reg = <0x0 0x0 0x2000000>;
 			bank-width = <4>;
 			device-width = <1>;
 		};
 
 		board-control@1,0 {
-			reg = <1 0 20>;
+			reg = <0x1 0x0 0x20>;
 			compatible = "fsl,mpc8272ads-bcsr";
 		};
+
+		simple-periph@2,0 {
+			compatible = "fsl,elbc-gpcm-uio";
+			reg = <0x2 0x0 0x10000>;
+			elbc-gpcm-br = <0xfd810800>;
+			elbc-gpcm-or = <0xffff09f7>;
+		};
 	};

arch/powerpc/include/asm/fsl_lbc.h

@@ -95,6 +95,9 @@ struct fsl_lbc_bank {
 #define OR_FCM_TRLX_SHIFT                2
 #define OR_FCM_EHTR             0x00000002
 #define OR_FCM_EHTR_SHIFT                1
+
+#define OR_GPCM_AM		0xFFFF8000
+#define OR_GPCM_AM_SHIFT		15
 };
 
 struct fsl_lbc_regs {

drivers/uio/Kconfig

@@ -104,6 +104,26 @@ config UIO_NETX
 	  To compile this driver as a module, choose M here; the module
 	  will be called uio_netx.
 
+config UIO_FSL_ELBC_GPCM
+	tristate "eLBC/GPCM driver"
+	depends on FSL_LBC
+	help
+	  Generic driver for accessing a peripheral connected to an eLBC port
+	  that is running in GPCM mode. GPCM is an interface for simple lower
+	  performance memories and memory-mapped devices. For devices using
+	  FCM or UPM eLBC modes, other device-specific drivers are available.
+
+config UIO_FSL_ELBC_GPCM_NETX5152
+	bool "eLBC/GPCM netX 51/52 support"
+	depends on UIO_FSL_ELBC_GPCM
+	help
+	  This will add support for netX 51/52 devices connected via eLBC/GPCM.
+	  In particular, it implements interrupt handling. This can be used
+	  together with the userspace netX stack from Hilscher.
+
+	  Information about this hardware can be found at:
+	  http://www.hilscher.com/netx
+
 config UIO_PRUSS
 	tristate "Texas Instruments PRUSS driver"
 	depends on ARCH_DAVINCI_DA850

drivers/uio/Makefile

@@ -8,3 +8,4 @@ obj-$(CONFIG_UIO_PCI_GENERIC)	+= uio_pci_generic.o
 obj-$(CONFIG_UIO_NETX)	+= uio_netx.o
 obj-$(CONFIG_UIO_PRUSS)         += uio_pruss.o
 obj-$(CONFIG_UIO_MF624)         += uio_mf624.o
+obj-$(CONFIG_UIO_FSL_ELBC_GPCM)	+= uio_fsl_elbc_gpcm.o