[DNX#2006040142001249] [U-Boot-Users] [PATCH 7/7] Flat device tree suppor [...]

[DENX Support System]

Hello list,

inside the automatic U-Boot patch tracking system a new ticket
[DNX#2006040142001249] was created:

<snip>
> * Switched default PCI speed for 8540 ADS back to 33MHz
> * Added comments and a printf to warn that PCI-X won't
>   work at 33MHz
> 
> ---
> 
>  cpu/mpc85xx/pci.c            |    3 +++
>  doc/README.mpc85xxads        |    3 +++
>  include/configs/MPC8540ADS.h |    6 +++++-
>  3 files changed, 11 insertions(+), 1 deletions(-)
> 
> db86eda9e3cd0b3e89bd50965a49b6232f1d97c3
> diff --git a/cpu/mpc85xx/pci.c b/cpu/mpc85xx/pci.c
> index ca11bce..cfb7dcd 100644
> --- a/cpu/mpc85xx/pci.c
> +++ b/cpu/mpc85xx/pci.c
> @@ -72,6 +72,9 @@ pci_mpc85xx_init(struct pci_controller *
>  
>  	if (!(gur->pordevsr & PORDEVSR_PCI)) {
>  		/* PCI-X init */
> +		if (CONFIG_SYS_CLK_FREQ < 66000000)
> +			printf("PCI-X will only work at 66 MHz\n");
> +
>  		reg16 = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
>  			| PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
>  		pci_hose_write_config_word(hose, dev, PCIX_COMMAND, reg16);
> diff --git a/doc/README.mpc85xxads b/doc/README.mpc85xxads
> index f0cf782..ae8202b 100644
> --- a/doc/README.mpc85xxads
> +++ b/doc/README.mpc85xxads
> @@ -100,6 +100,9 @@ Updated 13-July-2004 Jon Loeliger
>  	SW7[1:4]  =    0101 =  5    => 5 x 66	 = 330	CCB Sysclk
>  	SW7[5:6]  =	 01	    => 5:2 x 330 = 825	Core clock
>  
> +    In order to use PCI-X (only in the first PCI slot.  The one with
> +    the RIO connector), you need to set SW1[4] (config) to 1 (off).
> +    Also, configure the board to run PCI at 66 MHz.
>  
>  2. MEMORY MAP TO WORK WITH LINUX KERNEL
>  
> diff --git a/include/configs/MPC8540ADS.h b/include/configs/MPC8540ADS.h
> index 81ee945..8e4d2c9 100644
> --- a/include/configs/MPC8540ADS.h
> +++ b/include/configs/MPC8540ADS.h
> @@ -68,10 +68,14 @@
>   * The board, however, can run at 66MHz.  In any event, this value
>   * must match the settings of some switches.  Details can be found
>   * in the README.mpc85xxads.
> + *
> + * XXX -- Can't we run at 66 MHz, anyway?  PCI should drop to
> + * 33MHz to accommodate, based on a PCI pin.
> + * Note that PCI-X won't work at 33MHz.
>   */
>  
>  #ifndef CONFIG_SYS_CLK_FREQ
> -#define CONFIG_SYS_CLK_FREQ	66000000
> +#define CONFIG_SYS_CLK_FREQ	33000000
>  #endif
>  
>  
> -- 
> 1.2.4
> 
> 
> 
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</snip>

Your U-Boot support team