Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * QE USB routines
3 *
4 * Copyright (c) Freescale Semicondutor, Inc. 2006.
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>
9 *
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.
14 */
15
16#include <linux/kernel.h>
17#include <linux/errno.h>
18#include <linux/io.h>
19#include <asm/immap_qe.h>
20#include <asm/qe.h>
21
22int qe_usb_clock_set(enum qe_clock clk, int rate)
23{
24 struct qe_mux __iomem *mux = &qe_immr->qmx;
25 unsigned long flags;
26 u32 val;
27
28 switch (clk) {
29 case QE_CLK3: val = QE_CMXGCR_USBCS_CLK3; break;
30 case QE_CLK5: val = QE_CMXGCR_USBCS_CLK5; break;
31 case QE_CLK7: val = QE_CMXGCR_USBCS_CLK7; break;
32 case QE_CLK9: val = QE_CMXGCR_USBCS_CLK9; break;
33 case QE_CLK13: val = QE_CMXGCR_USBCS_CLK13; break;
34 case QE_CLK17: val = QE_CMXGCR_USBCS_CLK17; break;
35 case QE_CLK19: val = QE_CMXGCR_USBCS_CLK19; break;
36 case QE_CLK21: val = QE_CMXGCR_USBCS_CLK21; break;
37 case QE_BRG9: val = QE_CMXGCR_USBCS_BRG9; break;
38 case QE_BRG10: val = QE_CMXGCR_USBCS_BRG10; break;
39 default:
40 pr_err("%s: requested unknown clock %d\n", __func__, clk);
41 return -EINVAL;
42 }
43
44 if (qe_clock_is_brg(clk))
45 qe_setbrg(clk, rate, 1);
46
47 spin_lock_irqsave(&cmxgcr_lock, flags);
48
49 clrsetbits_be32(&mux->cmxgcr, QE_CMXGCR_USBCS, val);
50
51 spin_unlock_irqrestore(&cmxgcr_lock, flags);
52
53 return 0;
54}
55EXPORT_SYMBOL(qe_usb_clock_set);