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401da25827
This re-factors clock_get_periph_rate() to be a simpler and also
make a few corrections along the way. To summarize:
- clk_bit_info is no longer used. It had numerous errors and was
really painful anyway since it was just a bunch of opaque magic
numbers that made bugs non-obvious.
- Clock source bitfields for peripherals handled in the switch
statement are 3 bits, not 4. Some divider values are 3 bits,
some are 4. The earlier code always assumed 4 bits for both
which included reserved bits in many cases.
- UART source clock and divider shift values were wrong.
- PWM clock divider was being read from the wrong register.
- SPI3 divider value was being read from the wrong register.
- There was a really confusing calculation for SDMMC0 and SDMMC2
clock rates, but it was never actually used since the switch
statement never handled PERIPH_ID_SDMMC{0,2} and would thus
return if they were ever passed into this function.
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Change-Id: I0a03a64d8b42fbe83dbf377292597ce681b22f4b
Reviewed-on: https://gerrit.chromium.org/gerrit/65284
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4463
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>