i2c-mpc: add support for the MPC512x processors from Freescale

As I2C interrupts must  be enabled for the MPC512x by the setup function
as well, "fsl,preserve-clocking" is handled in a slighly different way.
Also, the old settings are now reported calling dev_dbg(). For the
MPC512x the clock setup function of the MPC52xx can be re-used.
Furthermore, the Kconfig help has been updated and corrected.

Signed-off-by: Wolfgang Grandegger <wg@denx.de>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 10041813c6ed..ecf079b7f931 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -419,13 +419,12 @@ config I2C_IXP2000
           instead.
 
 config I2C_MPC
-        tristate "MPC107/824x/85xx/52xx/86xx"
+        tristate "MPC107/824x/85xx/512x/52xx/83xx/86xx"
         depends on PPC32
         help
           If you say yes to this option, support will be included for the
-          built-in I2C interface on the MPC107/Tsi107/MPC8240/MPC8245 and
-          MPC85xx/MPC8641 family processors. The driver may also work on 52xx
-          family processors, though interrupts are known not to work.
+          built-in I2C interface on the MPC107, Tsi107, MPC512x, MPC52xx,
+          MPC8240, MPC8245, MPC83xx, MPC85xx and MPC8641 family processors.
 
           This driver can also be built as a module.  If so, the module
           will be called i2c-mpc.