staging: mt7621-spi: add mt7621 support

NeilBrown: The code will fail with a warning if asked to transfer more than 32 bytes at a time. So used max_transfer_size interface to tell users about this. Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: NeilBrown <neil@brown.name> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
mariux64 · Mar 19, 2018 · 1ab7f2a · 1ab7f2a
1 parent 16e556a
commit 1ab7f2a
Show file tree

Hide file tree

Showing 6 changed files with 504 additions and 0 deletions.
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
@@ -122,4 +122,6 @@ source "drivers/staging/mt7621-pinctrl/Kconfig"
 
 source "drivers/staging/mt7621-gpio/Kconfig"
 
+source "drivers/staging/mt7621-spi/Kconfig"
+
 endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
@@ -52,3 +52,4 @@ obj-$(CONFIG_PI433)		+= pi433/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-pci/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-pinctrl/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-gpio/
+obj-$(CONFIG_SOC_MT7621)	+= mt7621-spi/
diff --git a/drivers/staging/mt7621-spi/Kconfig b/drivers/staging/mt7621-spi/Kconfig
@@ -0,0 +1,6 @@
+config SPI_MT7621
+	tristate "MediaTek MT7621 SPI Controller"
+	depends on RALINK
+	help
+	  This selects a driver for the MediaTek MT7621 SPI Controller.
+
diff --git a/drivers/staging/mt7621-spi/Makefile b/drivers/staging/mt7621-spi/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_SPI_MT7621)		+= spi-mt7621.o
diff --git a/drivers/staging/mt7621-spi/TODO b/drivers/staging/mt7621-spi/TODO
@@ -0,0 +1,5 @@
+
+- general code review and clean up
+- ensure device-tree requirements are documented
+
+Cc: NeilBrown <neil@brown.name>