xref: /openbmc/u-boot/doc/README.fsl-hwconfig (revision a2d12f88129a0a1a7c18630b7a48ade22a48416e)
1*a2d12f88STimur TabiFreescale-specific 'hwconfig' options.
2*a2d12f88STimur Tabi
3*a2d12f88STimur TabiThis file documents Freescale-specific key:value pairs for the 'hwconfig'
4*a2d12f88STimur Tabioption.  See README.hwconfig for general information about 'hwconfig'.
5*a2d12f88STimur Tabi
6*a2d12f88STimur Tabiaudclk
7*a2d12f88STimur Tabi	Specific to the P1022DS reference board.
8*a2d12f88STimur Tabi
9*a2d12f88STimur Tabi	This option specifies which of the two oscillator frequencies should be
10*a2d12f88STimur Tabi	routed to the Wolfson WM8776 codec.  The ngPIXIS can be programmed to
11*a2d12f88STimur Tabi	route either a 11.2896MHz or a 12.288MHz clock.  The default is
12*a2d12f88STimur Tabi	12.288MHz.  This option has two effects.  First, the MUX on the board
13*a2d12f88STimur Tabi	will be programmed accordingly.  Second, the clock-frequency property
14*a2d12f88STimur Tabi	in the codec node in the device tree will be updated to the correct
15*a2d12f88STimur Tabi	value.
16*a2d12f88STimur Tabi
17*a2d12f88STimur Tabi	'audclk:11'
18*a2d12f88STimur Tabi		Select the 11.2896MHz clock
19*a2d12f88STimur Tabi
20*a2d12f88STimur Tabi	'audclk:12'
21*a2d12f88STimur Tabi		Select the 12.288MHz clock
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