ata: Generic platform_device libata driver, take 2.

This is the second attempt at a generic platform_device libata driver, attempting to take in to account issues raised by Matthias Fuchs and rmk.

Changes in this version include adding a small pata_platform.h header for the private data (which at the moment is limited to a register shift that's needed by ARM), though other things can be added in here if platforms start having other needs.

At the moment this takes care of the IDE needs across some PPC and SH, and with this change, hopefully ARM as well. H8300 should still be trivial to move over to this.

Comments?

--

 drivers/ata/Kconfig           |    9 +
 drivers/ata/Makefile          |    1 
 drivers/ata/pata_platform.c   |  295 ++++++++++++++++++++++++++++++++++++++++++
 include/linux/pata_platform.h |   13 +
 4 files changed, 318 insertions(+)

index 03f6338..ac4aa73 100644
@@ -483,6 +483,15 @@ config PATA_WINBOND
 
 	  If unsure, say N.
 
+config PATA_PLATFORM
+	tristate "Generic platform device PATA support"
+	depends on EMBEDDED
+	help
+	  This option enables support for generic directly connected ATA
+	  devices commonly found on embedded systems.
+
+	  If unsure, say N.
+
 endif
 endmenu
 

index 72243a6..408c8c9 100644
@@ -53,6 +53,7 @@ obj-$(CONFIG_PATA_VIA)		+= pata_via.o
 obj-$(CONFIG_PATA_WINBOND)	+= pata_sl82c105.o
 obj-$(CONFIG_PATA_SIS)		+= pata_sis.o
 obj-$(CONFIG_PATA_TRIFLEX)	+= pata_triflex.o
+obj-$(CONFIG_PATA_PLATFORM)	+= pata_platform.o
 # Should be last but one libata driver
 obj-$(CONFIG_ATA_GENERIC)	+= ata_generic.o
 # Should be last libata driver

new file mode 100644
index 0000000..2d5fd64
@@ -0,0 +1,13 @@
+#ifndef __LINUX_PATA_PLATFORM_H
+#define __LINUX_PATA_PLATFORM_H
+
+struct pata_platform_info {
+	/*
+	 * I/O port shift, for platforms with ports that are
+	 * constantly spaced and need larger than the 1-byte
+	 * spacing used by ata_std_ports().
+	 */
+	unsigned int ioport_shift;
+};
+
+#endif /* __LINUX_PATA_PLATFORM_H */

Thanks, this will enable me to use this code on ARM.

Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core

Andrew, can you add this to -mm? No one has raised any other objections to this particular patch, and without it, IDE on most SH boards is a no-go.