/**
 * Freescale ALSA SoC Machine driver utility
 *
 * Author: Timur Tabi <timur@freescale.com>
 *
 * Copyright 2010 Freescale Semiconductor, Inc.
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2.  This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */

#include <linux/module.h>
#include <linux/of_address.h>
#include <sound/soc.h>

#include "fsl_utils.h"

/**
 * fsl_asoc_get_dma_channel - determine the dma channel for a SSI node
 *
 * @ssi_np: pointer to the SSI device tree node
 * @name: name of the phandle pointing to the dma channel
 * @dai: ASoC DAI link pointer to be filled with platform_name
 * @dma_channel_id: dma channel id to be returned
 * @dma_id: dma id to be returned
 *
 * This function determines the dma and channel id for given SSI node.  It
 * also discovers the platform_name for the ASoC DAI link.
 */
int fsl_asoc_get_dma_channel(struct device_node *ssi_np,
			     const char *name,
			     struct snd_soc_dai_link *dai,
			     unsigned int *dma_channel_id,
			     unsigned int *dma_id)
{
	struct resource res;
	struct device_node *dma_channel_np, *dma_np;
	const u32 *iprop;
	int ret;

	dma_channel_np = of_parse_phandle(ssi_np, name, 0);
	if (!dma_channel_np)
		return -EINVAL;

	if (!of_device_is_compatible(dma_channel_np, "fsl,ssi-dma-channel")) {
		of_node_put(dma_channel_np);
		return -EINVAL;
	}

	/* Determine the dev_name for the device_node.  This code mimics the
	 * behavior of of_device_make_bus_id(). We need this because ASoC uses
	 * the dev_name() of the device to match the platform (DMA) device with
	 * the CPU (SSI) device.  It's all ugly and hackish, but it works (for
	 * now).
	 *
	 * dai->platform name should already point to an allocated buffer.
	 */
	ret = of_address_to_resource(dma_channel_np, 0, &res);
	if (ret) {
		of_node_put(dma_channel_np);
		return ret;
	}
	snprintf((char *)dai->platform_name, DAI_NAME_SIZE, "%llx.%s",
		 (unsigned long long) res.start, dma_channel_np->name);

	iprop = of_get_property(dma_channel_np, "cell-index", NULL);
	if (!iprop) {
		of_node_put(dma_channel_np);
		return -EINVAL;
	}
	*dma_channel_id = be32_to_cpup(iprop);

	dma_np = of_get_parent(dma_channel_np);
	iprop = of_get_property(dma_np, "cell-index", NULL);
	if (!iprop) {
		of_node_put(dma_np);
		return -EINVAL;
	}
	*dma_id = be32_to_cpup(iprop);

	of_node_put(dma_np);
	of_node_put(dma_channel_np);

	return 0;
}
EXPORT_SYMBOL(fsl_asoc_get_dma_channel);

MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
MODULE_DESCRIPTION("Freescale ASoC utility code");
MODULE_LICENSE("GPL v2");
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/mtu3?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>mtu3</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/mtu3/Makefile?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>Makefile</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='e2160156bf2a7d5018e99a9993fbcdda0abac09b'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-02 16:54:00 -0500</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-02 16:54:00 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/mtu3/Makefile?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>e2160156bf2a7d5018e99a9993fbcdda0abac09b</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/mtu3/Makefile?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>1a70cb13dcfa7ade4c48d8a64d20543abebfb1dc</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/mtu3/Makefile?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>drivers/usb/mtu3/Makefile</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/mtu3/Makefile?h=nds-private-remove&amp;id=62e13097c46c69dbd7544ab2cd585ccf48f360a4'>62e13097c46c69dbd7544ab2cd585ccf48f360a4</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/mtu3/Makefile?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b&amp;id2=62e13097c46c69dbd7544ab2cd585ccf48f360a4'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/mtu3/Makefile?h=nds-private-remove&amp;id=6d04dfc8966019b8b0977b2cb942351f13d2b178'>6d04dfc8966019b8b0977b2cb942351f13d2b178</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/mtu3/Makefile?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b&amp;id2=6d04dfc8966019b8b0977b2cb942351f13d2b178'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net</div><div class='commit-msg'>All merge conflicts were simple overlapping changes.

Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>Diffstat</a> (limited to 'drivers/usb/mtu3/Makefile')</div><table summary='diffstat' class='diffstat'>