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-rw-r--r--arch/arm/plat-mxc/audmux-v1.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/audmux-v1.c b/arch/arm/plat-mxc/audmux-v1.c
new file mode 100644
index 000000000000..b62917ca3f95
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+++ b/arch/arm/plat-mxc/audmux-v1.c
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1/*
2 * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
3 *
4 * Initial development of this code was funded by
5 * Phytec Messtechnik GmbH, http://www.phytec.de
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include <linux/module.h>
23#include <linux/err.h>
24#include <linux/io.h>
25#include <linux/clk.h>
26#include <mach/audmux.h>
27#include <mach/hardware.h>
28
29static void __iomem *audmux_base;
30
31static unsigned char port_mapping[] = {
32 0x0, 0x4, 0x8, 0x10, 0x14, 0x1c,
33};
34
35int mxc_audmux_v1_configure_port(unsigned int port, unsigned int pcr)
36{
37 if (!audmux_base) {
38 printk("%s: not configured\n", __func__);
39 return -ENOSYS;
40 }
41
42 if (port >= ARRAY_SIZE(port_mapping))
43 return -EINVAL;
44
45 writel(pcr, audmux_base + port_mapping[port]);
46
47 return 0;
48}
49EXPORT_SYMBOL_GPL(mxc_audmux_v1_configure_port);
50
51static int mxc_audmux_v1_init(void)
52{
53#ifdef CONFIG_MACH_MX21
54 if (cpu_is_mx21())
55 audmux_base = MX21_IO_ADDRESS(MX21_AUDMUX_BASE_ADDR);
56 else
57#endif
58#ifdef CONFIG_MACH_MX27
59 if (cpu_is_mx27())
60 audmux_base = MX27_IO_ADDRESS(MX27_AUDMUX_BASE_ADDR);
61 else
62#endif
63 (void)0;
64
65 return 0;
66}
67
68postcore_initcall(mxc_audmux_v1_init);