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Commit 5f86ceba authored by Marc Zyngier's avatar Marc Zyngier Committed by Eric Miao
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[ARM] pxa/zeus: relax memory timings on Zeus ethernet ports 



DM9000s on Zeus sometime fail under heavy load.
Relaxing the timings a bit seems to be of a great help.

Signed-off-by: default avatarMarc Zyngier <maz@misterjones.org>
Signed-off-by: default avatarEric Miao <eric.y.miao@gmail.com>
parent 100627b4

arch/arm/mach-pxa/zeus.c

+10 −1
Original line number Diff line number Diff line
@@ -726,9 +726,18 @@ static mfp_cfg_t zeus_pin_config[] __initdata = { 
	GPIO99_GPIO,		/* CF RDY */

};



/*

 * DM9k MSCx settings:	SRAM, 16 bits

 *			17 cycles delay first access

 *			 5 cycles delay next access

 *			13 cycles recovery time

 *			faster device

 */

#define DM9K_MSC_VALUE		0xe4c9



static void __init zeus_init(void)

{

	u16 dm9000_msc = 0xe279;

	u16 dm9000_msc = DM9K_MSC_VALUE;



	system_rev = __raw_readw(ZEUS_CPLD_VERSION);

	pr_info("Zeus CPLD V%dI%d\n", (system_rev & 0xf0) >> 4, (system_rev & 0x0f));