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drivers/uart: Use uart_platform_refclk for all UART models

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Allow the platform to override the input clock for the UART by
implementing the routine uart_platform_refclk and setting the Kconfig
value UART_OVERRIDE_REFCLK.  Provide a default uart_platform_refclk
routine which is disabled when UART_OVERRIDE_REFCLK is selected.  This
works around ROMCC not supporting weak routines.

Testing on Galileo:
*  Edit the src/mainboard/intel/galileo/Makefile.inc file:
   *  Add "select ADD_FSP_PDAT_FILE"
   *  Add "select ADD_FSP_RAW_BIN"
   *  Add "select ADD_RMU_FILE"
*  Place the FSP.bin file in the location specified by CONFIG_FSP_FILE
*  Place the pdat.bin files in the location specified by
   CONFIG_FSP_PDAT_FILE
*  Place the rmu.bin file in the location specified by CONFIG_RMU_FILE
*  Build EDK2 CorebootPayloadPkg/CorebootPayloadPkgIa32.dsc to generate
   UEFIPAYLOAD.fd
*  Testing is successful when CorebootPayloadPkg is able to properly
   initialize the serial port without using built-in values.

Change-Id: If4afc45a828e5ba935fecb6d95b239625e912d14
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/14612
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Lee Leahy
2016-05-07 09:04:46 -07:00
committed by Leroy P Leahy
parent 148762110c
commit 6ec72c9b4f
17 changed files with 38 additions and 44 deletions
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1
src/soc/intel/quark/Kconfig
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@@ -30,6 +30,7 @@ config CPU_SPECIFIC_OPTIONS
select SOC_INTEL_COMMON
select SOC_SETS_MTRRS
select TSC_CONSTANT_RATE
select UART_OVERRIDE_REFCLK
select UDELAY_TSC
select UNCOMPRESSED_RAMSTAGE
select USE_MARCH_586