intel/common/block/i2c: Add common block for I2C and use the same in SoCs

In the intel/common/block
* Move I2C common code from intel/common to intel/common/block.
* Split the code into common, early init and post mem init stages and put it
  in lpss_i2c.c, i2c_early.c and i2c.c respectively.
* Declare functions for getting platform specific i2c bus config and
  mapping bus to devfn and vice versa, that have to be implemented by SoC.

In skylake/apollolake
* Stop using code from soc/intel/common/lpss_i2c.c.
* Remove early i2c initialization code from bootblock.
* Refactor i2c.c file to implement SoC specific methods
  required by the I2C IP block.

Change-Id: I4d91a04c22e181e3a995112cce6d5f0324130b81
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-on: https://review.coreboot.org/19468
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/src/soc/intel/apollolake/Makefile.inc b/src/soc/intel/apollolake/Makefile.inc
index 50d323fb4a..9b1f44022d 100644
--- a/src/soc/intel/apollolake/Makefile.inc
+++ b/src/soc/intel/apollolake/Makefile.inc
@@ -13,6 +13,7 @@ bootblock-y += bootblock/bootblock.c
 bootblock-y += car.c
 bootblock-y += gpio.c
 bootblock-y += heci.c
+bootblock-y += i2c.c
 bootblock-y += lpc_lib.c
 bootblock-y += mmap_boot.c
 bootblock-y += pmutil.c
@@ -25,7 +26,7 @@ romstage-y += car.c
 romstage-$(CONFIG_PLATFORM_USES_FSP2_0) += romstage.c
 romstage-y += gpio.c
 romstage-y += heci.c
-romstage-y += i2c_early.c
+romstage-y += i2c.c
 romstage-$(CONFIG_SOC_UART_DEBUG) += uart_early.c
 romstage-y += lpc_lib.c
 romstage-y += memmap.c
@@ -83,7 +84,7 @@ postcar-y += tsc_freq.c
 postcar-$(CONFIG_FSP_CAR) += exit_car_fsp.S
 
 verstage-y += car.c
-verstage-y += i2c_early.c
+verstage-y += i2c.c
 verstage-y += heci.c
 verstage-y += memmap.c
 verstage-y += mmap_boot.c