75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
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/*
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* Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
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*
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* Initial development of this code was funded by
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* Phytec Messtechnik GmbH, http://www.phytec.de
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <mach/audmux.h>
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#include <mach/hardware.h>
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static struct clk *audmux_clk;
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static void __iomem *audmux_base;
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#define MXC_AUDMUX_V2_PTCR(x) ((x) * 8)
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#define MXC_AUDMUX_V2_PDCR(x) ((x) * 8 + 4)
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int mxc_audmux_v2_configure_port(unsigned int port, unsigned int ptcr,
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unsigned int pdcr)
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{
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if (!audmux_base)
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return -ENOSYS;
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if (audmux_clk)
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clk_enable(audmux_clk);
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writel(ptcr, audmux_base + MXC_AUDMUX_V2_PTCR(port));
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writel(pdcr, audmux_base + MXC_AUDMUX_V2_PDCR(port));
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if (audmux_clk)
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clk_disable(audmux_clk);
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return 0;
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}
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EXPORT_SYMBOL_GPL(mxc_audmux_v2_configure_port);
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static int mxc_audmux_v2_init(void)
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{
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int ret;
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if (cpu_is_mx35()) {
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audmux_clk = clk_get(NULL, "audmux");
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if (IS_ERR(audmux_clk)) {
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ret = PTR_ERR(audmux_clk);
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printk(KERN_ERR "%s: cannot get clock: %d\n", __func__,
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ret);
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return ret;
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}
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}
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if (cpu_is_mx31() || cpu_is_mx35())
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audmux_base = IO_ADDRESS(AUDMUX_BASE_ADDR);
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return 0;
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}
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postcore_initcall(mxc_audmux_v2_init);
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