4 * Copyright 2006 Freescale Semiconductor, Inc.
5 * Shlomi Gridish <gridish@freescale.com>
6 * Jerry Huang <Chang-Ming.Huang@freescale.com>
7 * Copyright (c) MontaVista Software, Inc. 2008.
8 * Anton Vorontsov <avorontsov@ru.mvista.com>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/export.h>
20 #include <asm/immap_qe.h>
23 int qe_usb_clock_set(enum qe_clock clk
, int rate
)
25 struct qe_mux __iomem
*mux
= &qe_immr
->qmx
;
30 case QE_CLK3
: val
= QE_CMXGCR_USBCS_CLK3
; break;
31 case QE_CLK5
: val
= QE_CMXGCR_USBCS_CLK5
; break;
32 case QE_CLK7
: val
= QE_CMXGCR_USBCS_CLK7
; break;
33 case QE_CLK9
: val
= QE_CMXGCR_USBCS_CLK9
; break;
34 case QE_CLK13
: val
= QE_CMXGCR_USBCS_CLK13
; break;
35 case QE_CLK17
: val
= QE_CMXGCR_USBCS_CLK17
; break;
36 case QE_CLK19
: val
= QE_CMXGCR_USBCS_CLK19
; break;
37 case QE_CLK21
: val
= QE_CMXGCR_USBCS_CLK21
; break;
38 case QE_BRG9
: val
= QE_CMXGCR_USBCS_BRG9
; break;
39 case QE_BRG10
: val
= QE_CMXGCR_USBCS_BRG10
; break;
41 pr_err("%s: requested unknown clock %d\n", __func__
, clk
);
45 if (qe_clock_is_brg(clk
))
46 qe_setbrg(clk
, rate
, 1);
48 spin_lock_irqsave(&cmxgcr_lock
, flags
);
50 clrsetbits_be32(&mux
->cmxgcr
, QE_CMXGCR_USBCS
, val
);
52 spin_unlock_irqrestore(&cmxgcr_lock
, flags
);
56 EXPORT_SYMBOL(qe_usb_clock_set
);