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powerpc/QE: add support for QE USB clocks routing

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This patch adds a function to the qe_lib to setup QE USB clocks routing.
To setup clocks safely, cmxgcr register needs locking, so I just reused
ucc_lock since it was used only to protect cmxgcr.

The idea behind placing clocks routing functions into the qe_lib is that
later we'll hopefully switch to the generic Linux Clock API, thus, for
example, FHCI driver may be used for QE and CPM chips without nasty #ifdefs.

This patch also fixes QE_USB_RESTART_TX command definition in the qe.h.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-By: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Anton Vorontsov
2008-05-23 20:38:56 +04:00
committed by Kumar Gala
parent 83ff9dcf37
commit 5e41486c40
5 changed files with 86 additions and 4 deletions
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7
arch/powerpc/sysdev/qe_lib/ucc.c
View File

@ -26,7 +26,8 @@
#include <asm/qe.h>
#include <asm/ucc.h>
static DEFINE_SPINLOCK(ucc_lock);
DEFINE_SPINLOCK(cmxgcr_lock);
EXPORT_SYMBOL(cmxgcr_lock);
int ucc_set_qe_mux_mii_mng(unsigned int ucc_num)
{
@ -35,10 +36,10 @@ int ucc_set_qe_mux_mii_mng(unsigned int ucc_num)
if (ucc_num > UCC_MAX_NUM - 1)
return -EINVAL;
spin_lock_irqsave(&ucc_lock, flags);
spin_lock_irqsave(&cmxgcr_lock, flags);
clrsetbits_be32(&qe_immr->qmx.cmxgcr, QE_CMXGCR_MII_ENET_MNG,
ucc_num << QE_CMXGCR_MII_ENET_MNG_SHIFT);
spin_unlock_irqrestore(&ucc_lock, flags);
spin_unlock_irqrestore(&cmxgcr_lock, flags);
return 0;
}