sysmo-bts
/
u-boot
9
0
Fork 0
Code Pull Requests Releases Activity

armv8: fsl: Enable USB only when SYSCLK is 100 MHz 

SYSCLK is used as a reference clock for USB. When the USB controller
is used, SYSCLK must meet the additional requirement of 100 MHz.

Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Sriram Dash 2016-10-03 16:24:46 +05:30 committed by York Sun
parent e1e3fc143d
commit c93db4f763
1 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
arch/arm/cpu/armv8/fsl-layerscape/fdt.c
View File

@ -108,6 +108,24 @@ remove_psci_node:
}
#endif
void fsl_fdt_disable_usb(void *blob)
{
int off;
/*
* SYSCLK is used as a reference clock for USB. When the USB
* controller is used, SYSCLK must meet the additional requirement
* of 100 MHz.
*/
if (CONFIG_SYS_CLK_FREQ != 100000000) {
off = fdt_node_offset_by_compatible(blob, -1, "snps,dwc3");
while (off != -FDT_ERR_NOTFOUND) {
fdt_status_disabled(blob, off);
off = fdt_node_offset_by_compatible(blob, off,
"snps,dwc3");
}
}
}
void ft_cpu_setup(void *blob, bd_t *bd)
{
#ifdef CONFIG_FSL_LSCH2
@ -150,4 +168,6 @@ void ft_cpu_setup(void *blob, bd_t *bd)
#ifdef CONFIG_SYS_DPAA_FMAN
fdt_fixup_fman_firmware(blob);
#endif
fsl_fdt_disable_usb(blob);
}