i2c-ocores: Can add I2C devices to the bus

There is sometimes a need for the ocores driver to add devices to the
bus when installed.

i2c_register_board_info can not always be used, because the I2C devices
 are not known at an early state, they could for instance be connected
 on a I2C bus on a PCI device which has the Open Cores IP.

i2c_new_device can not be used in all cases either since the resulting
bus nummer might be unknown.

The solution is the pass a list of I2C devices in the platform data to
the Open Cores driver. This is useful for MFD drivers.

Signed-off-by: Richard Röjfors <richard.rojfors.ext@mocean-labs.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/Documentation/i2c/busses/i2c-ocores b/Documentation/i2c/busses/i2c-ocores
index cfcebb10d14e..c269aaa2f26a 100644
--- a/Documentation/i2c/busses/i2c-ocores
+++ b/Documentation/i2c/busses/i2c-ocores
@@ -20,6 +20,8 @@ platform_device with the base address and interrupt number. The
 dev.platform_data of the device should also point to a struct
 ocores_i2c_platform_data (see linux/i2c-ocores.h) describing the
 distance between registers and the input clock speed.
+There is also a possibility to attach a list of i2c_board_info which
+the i2c-ocores driver will add to the bus upon creation.
 
 E.G. something like:
 
@@ -36,9 +38,24 @@ static struct resource ocores_resources[] = {
         },
 };
 
+/* optional board info */
+struct i2c_board_info ocores_i2c_board_info[] = {
+        {
+                I2C_BOARD_INFO("tsc2003", 0x48),
+                .platform_data = &tsc2003_platform_data,
+                .irq = TSC_IRQ
+        },
+        {
+                I2C_BOARD_INFO("adv7180", 0x42 >> 1),
+                .irq = ADV_IRQ
+        }
+};
+
 static struct ocores_i2c_platform_data myi2c_data = {
         .regstep        = 2,            /* two bytes between registers */
         .clock_khz      = 50000,        /* input clock of 50MHz */
+        .devices        = ocores_i2c_board_info, /* optional table of devices */
+        .num_devices    = ARRAY_SIZE(ocores_i2c_board_info), /* table size */
 };
 
 static struct platform_device myi2c = {