i2c: i2c-cbus-gpio: introduce driver

Add i2c driver to enable access to devices behind CBUS on Nokia Internet
Tablets.

The patch also adds CBUS I2C configuration for N8x0 which is one of the
users of this driver.

Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index e9df4612b7eb..e949edf644d4 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -337,6 +337,16 @@ config I2C_BLACKFIN_TWI_CLK_KHZ
         help
           The unit of the TWI clock is kHz.
 
+config I2C_CBUS_GPIO
+        tristate "CBUS I2C driver"
+        depends on GENERIC_GPIO
+        help
+          Support for CBUS access using I2C API. Mostly relevant for Nokia
+          Internet Tablets (770, N800 and N810).
+
+          This driver can also be built as a module.  If so, the module
+          will be called i2c-cbus-gpio.
+
 config I2C_CPM
         tristate "Freescale CPM1 or CPM2 (MPC8xx/826x)"
         depends on (CPM1 || CPM2) && OF_I2C