[PATCH V2] spi: add support for aeroflex gaisler spimctrl

[Jan Andersson <jan-FkzTOoA/JUlBDgjK7y7TUQ@public.gmane.org>]

This patch adds support for Aeroflex Gaisler SPI memory controller (SPIMCTRL).
SPIMCTRL memory maps a SPI flash device into AMBA address space. The core
also has a register interface where any command can be sent to the device.

The controller is typically found on LEON/GRLIB SoCs.

Tested on GR-LEON4-ITX development board.

Patch is against spi/next.

Signed-off-by: Jan Andersson <jan-FkzTOoA/JUlBDgjK7y7TUQ@public.gmane.org>
---

Changes in V2:
* Use IRQF_SHARED and check in interrupt handler if DONE flag is set,
  otherwise return IRQ_NONE
* Rename driver to match name of other LEON/GRLIB drivers
* Fixes after comments from Grant Likely:
** Fix inconsistent whitespace in Kconfig entry
** Use of_node_get() when assigning hw->bitbang.master->dev.of_node
** Use platform_get_resource() instead of hardcoding the offset into the
   resource table
---
 drivers/spi/Kconfig  |    8 ++++++++
 drivers/spi/Makefile |    1 +
 2 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index fc14b8d..be53561 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -53,6 +53,14 @@ if SPI_MASTER
 
 comment "SPI Master Controller Drivers"
 
+config SPI_GRLIB_SPIMCTRL
+	tristate "Aeroflex Gaisler SPI memory controller"
+	depends on SPARC_LEON
+	select SPI_BITBANG
+	help
+	  This is the driver for Aeroflex Gaisler's SPI memory controller
+	  (SPIMCTRL) found on some LEON/GRLIB SoCs.
+
 config SPI_ALTERA
 	tristate "Altera SPI Controller"
 	select SPI_BITBANG
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index fd2fc5f..a528000 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -9,6 +9,7 @@ ccflags-$(CONFIG_SPI_DEBUG) := -DDEBUG
 obj-$(CONFIG_SPI_MASTER)		+= spi.o
 
 # SPI master controller drivers (bus)
+obj-$(CONFIG_SPI_GRLIB_SPIMCTRL)	+= grlib_spimctrl.o
 obj-$(CONFIG_SPI_ALTERA)		+= spi_altera.o
 obj-$(CONFIG_SPI_ATMEL)			+= atmel_spi.o
 obj-$(CONFIG_SPI_ATH79)			+= ath79_spi.o
-- 
1.7.0.4


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