mfd: Add support for STMPE SPI interface

Few STMPE controller can have register interface over SPI or I2C. Current
implementation only supports I2C.

This patch adds support for SPI interface for accessing STMPE's address space.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 7bc55819ab4a..06766ec5e288 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -258,7 +258,7 @@ config TWL6040_CORE
 
 config MFD_STMPE
         bool "Support STMicroelectronics STMPE"
-        depends on I2C=y && GENERIC_HARDIRQS
+        depends on (I2C=y || SPI_MASTER=y) && GENERIC_HARDIRQS
         select MFD_CORE
         help
           Support for the STMPE family of I/O Expanders from
@@ -288,6 +288,12 @@ config STMPE_I2C
         default y
         help
           This is used to enable I2C interface of STMPE
+
+config STMPE_SPI
+        bool "STMPE SPI Inteface"
+        depends on SPI_MASTER
+        help
+          This is used to enable SPI interface of STMPE
 endmenu
 
 config MFD_TC3589X