spi: Add SPI driver for MT76xx SoCs
This patch adds the SPI driver for the MediaTek MT7688 SoC (and
derivates). Its been tested on the LinkIt Smart 7688 and the Gardena
Smart Gateway with and SPI NOR on CS0 and on the Gardena Smart
Gateway additionally with an SPI NAND on CS1.
Note that the SPI controller only supports a max transfer size of 32
bytes. This driver implementes a workaround to enable bigger xfer
sizes to speed up the transfer especially for the SPI NAND support.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Jagan Teki <jagan@openedev.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Piotr Dymacz <pepe2k@gmail.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 196767a..1df6876 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -116,6 +116,14 @@
access the SPI NOR flash on platforms embedding this Intel
ICH IP core.
+config MT7621_SPI
+ bool "MediaTek MT7621 SPI driver"
+ depends on ARCH_MT7620
+ help
+ Enable the MT7621 SPI driver. This driver can be used to access
+ the SPI NOR flash on platforms embedding this Ralink / MediaTek
+ SPI core, like MT7621/7628/7688.
+
config MVEBU_A3700_SPI
bool "Marvell Armada 3700 SPI driver"
select CLK_ARMADA_3720