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authorAngelos Mouzakitis <a.mouzakitis@virtualopensystems.com>2023-10-10 14:33:42 +0000
committerAngelos Mouzakitis <a.mouzakitis@virtualopensystems.com>2023-10-10 14:33:42 +0000
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parente02cda008591317b1625707ff8e115a4841aa889 (diff)
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+Freescale-specific 'hwconfig' options.
+
+This file documents Freescale-specific key:value pairs for the 'hwconfig'
+option. See README.hwconfig for general information about 'hwconfig'.
+
+audclk
+ Specific to the P1022DS reference board.
+
+ This option specifies which of the two oscillator frequencies should be
+ routed to the Wolfson WM8776 codec. The ngPIXIS can be programmed to
+ route either a 11.2896MHz or a 12.288MHz clock. The default is
+ 12.288MHz. This option has two effects. First, the MUX on the board
+ will be programmed accordingly. Second, the clock-frequency property
+ in the codec node in the device tree will be updated to the correct
+ value.
+
+ 'audclk:11'
+ Select the 11.2896MHz clock
+
+ 'audclk:12'
+ Select the 12.288MHz clock
+
+usb
+ Specific to boards have USB controller
+
+ This option specifies the following for a USB controller:
+
+ - which controller mode to use
+ - which USB PHY to use
+
+ This is used by generic USB device-tree fixup function to update
+ modified values of phy type and controller mode.
+
+ Also used for configuring multiple USB controllers such that
+ 'usbN' (where N is 1, 2, etc. refers to controller no.)
+
+ 'phy_type'
+ Select USB phy type: 'utmi' OR 'ulpi'
+
+ 'dr_mode'
+ Select USB controller mode: 'host', 'peripheral' OR 'otg'
+
+ Examples:
+ usb1:dr_mode=host;usb2:dr_mode=peripheral'
+
+ usb1:dr_mode=host,phy_type=utmi;usb2:dr_mode=host'