From cc604ddd118cf4a699c12bc41a5fa2d2f225f702 Mon Sep 17 00:00:00 2001 From: Peter Tyser Date: Mon, 10 Jan 2011 17:34:14 -0600 Subject: [PATCH] USB: ehci-fsl: Fix 'have_sysif_regs' detection Previously a check was done on an ID register at the base of a CPU's internal USB registers to determine if system interface regsiters were present. The check looked for an ID register that had the format ID[0:5] == ~ID[8:13] as described in the MPC5121 User's Manual to determine if a MPC5121 or MPC83xx/85xx was being used. There are two issues with this method: - The ID register is not defined on the MPC83xx/85xx CPUs, so its unclear what is being checked on them. - Newer CPUs such as the P4080 also don't document the ID register, but do share the same format as the MPC5121. Thus the previous code did not set 'have_sysif_regs' properly which results in the P4080 not properly initializing its USB ports. Using the device tree 'compatible' node is a cleaner way to determine if 'have_sysif_regs' should be set and resolves the USB initialization issue seen on the P4080. Tested on a P4080-based system and compile tested on mpc512x_defconfig with Freescale EHCI driver enabled. Cc: Anatolij Gustschin Cc: David Brownell Cc: Kumar Gala Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Peter Tyser Signed-off-by: Greg Kroah-Hartman --- Reading git-format-patch failed