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clock.h

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  • Forked from Reform / reform-boundary-uboot
    35988 commits behind the upstream repository.
    • Stefano Babic's avatar
      8c38b5d0
      MX53: add function to set SATA clock to internal · 8c38b5d0
      Stefano Babic authored
      
      The MX53 SATA interface can use an internal clock (USB PHY1)
      instead of an external clock. This is an undocumented feature, but used
      on most Freescale's evaluation boards, such as MX53-loco.
      
      As stated by Freescale's support:
      
      Fuses (but not pins) may be used to configure SATA clocks.
      Particularly the i.MX53 Fuse_Map contains the next information
      about configuring SATA clocks :
      	SATA_ALT_REF_CLK[1:0] (offset 0x180C)
      
      '00' - 100MHz (External)
      '01' - 50MHz (External)
      '10' - 120MHz, internal (USB PHY)
      '11' - Reserved
      
      Signed-off-by: default avatarStefano Babic <sbabic@denx.de>
      CC: Fabio Estevam <fabio.estevam@freescale.com>
      8c38b5d0
      History
      MX53: add function to set SATA clock to internal
      Stefano Babic authored
      
      The MX53 SATA interface can use an internal clock (USB PHY1)
      instead of an external clock. This is an undocumented feature, but used
      on most Freescale's evaluation boards, such as MX53-loco.
      
      As stated by Freescale's support:
      
      Fuses (but not pins) may be used to configure SATA clocks.
      Particularly the i.MX53 Fuse_Map contains the next information
      about configuring SATA clocks :
      	SATA_ALT_REF_CLK[1:0] (offset 0x180C)
      
      '00' - 100MHz (External)
      '01' - 50MHz (External)
      '10' - 120MHz, internal (USB PHY)
      '11' - Reserved
      
      Signed-off-by: default avatarStefano Babic <sbabic@denx.de>
      CC: Fabio Estevam <fabio.estevam@freescale.com>
    clock.h 1.44 KiB