Re: [PATCH 1/2] amd76x_pm: C2 powersaving for AMD K7

Joerg Sommrey <[email protected]> wrote:
>
>  +static void
>  +config_amd768_C2(int enable)
>  +{
>  +	unsigned char regbyte;
>  +
>  +	/* Set C2 options in DevB:3x4F, page 100 in AMD-768 doc */
>  +	pci_read_config_byte(pdev_sb, 0x4F, &regbyte);
>  +	if(enable)
>  +		regbyte |= C2EN;
>  +	else
>  +		regbyte ^= C2EN;

 &= ?
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References:
- [PATCH 1/2] amd76x_pm: C2 powersaving for AMD K7
  - From: Joerg Sommrey <[email protected]>

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