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powerpc/83xx: Do not configure or probe disabled FSL DR USB controllers 

On MPC837X CPUs Dual-Role USB isn't always available (for example DR
USB pins can be muxed away to eSDHC).

U-Boot adds status = "disabled" property into the DR USB nodes to
indicate that we must not try to configure or probe Dual-Role USB,
otherwise we'll break eSDHC support on targets with MPC837X CPUs.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Anton Vorontsov 2009-02-19 19:02:23 +03:00 committed by Kumar Gala
parent 30c404699d
commit c026c98739
2 changed files with 6 additions and 1 deletions
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3
arch/powerpc/platforms/83xx/usb.c
View File

@ -14,6 +14,7 @@
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/of.h>
#include <asm/io.h>
#include <asm/prom.h>
@ -210,7 +211,7 @@ int mpc837x_usb_cfg(void)
int ret = 0;
np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
if (!np)
if (!np || !of_device_is_available(np))
return -ENODEV;
prop = of_get_property(np, "phy_type", NULL);

4
arch/powerpc/sysdev/fsl_soc.c
View File

@ -22,6 +22,7 @@
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
@ -328,6 +329,9 @@ static int __init fsl_usb_of_init(void)
struct fsl_usb2_platform_data usb_data;
const unsigned char *prop = NULL;
if (!of_device_is_available(np))
continue;
memset(&r, 0, sizeof(r));
memset(&usb_data, 0, sizeof(usb_data));