/*
 * Copyright (C) 2014 Marvell Technology Group Ltd.
 *
 * Marvell Berlin reset driver
 *
 * Antoine Tenart <antoine.tenart@free-electrons.com>
 * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
 *
 * 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/delay.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset-controller.h>
#include <linux/slab.h>
#include <linux/types.h>

#define BERLIN_MAX_RESETS	32

#define to_berlin_reset_priv(p)		\
	container_of((p), struct berlin_reset_priv, rcdev)

struct berlin_reset_priv {
	struct regmap			*regmap;
	struct reset_controller_dev	rcdev;
};

static int berlin_reset_reset(struct reset_controller_dev *rcdev,
			      unsigned long id)
{
	struct berlin_reset_priv *priv = to_berlin_reset_priv(rcdev);
	int offset = id >> 8;
	int mask = BIT(id & 0x1f);

	regmap_write(priv->regmap, offset, mask);

	/* let the reset be effective */
	udelay(10);

	return 0;
}

static const struct reset_control_ops berlin_reset_ops = {
	.reset	= berlin_reset_reset,
};

static int berlin_reset_xlate(struct reset_controller_dev *rcdev,
			      const struct of_phandle_args *reset_spec)
{
	unsigned offset, bit;

	offset = reset_spec->args[0];
	bit = reset_spec->args[1];

	if (bit >= BERLIN_MAX_RESETS)
		return -EINVAL;

	return (offset << 8) | bit;
}

static int berlin2_reset_probe(struct platform_device *pdev)
{
	struct device_node *parent_np = of_get_parent(pdev->dev.of_node);
	struct berlin_reset_priv *priv;

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->regmap = syscon_node_to_regmap(parent_np);
	of_node_put(parent_np);
	if (IS_ERR(priv->regmap))
		return PTR_ERR(priv->regmap);

	priv->rcdev.owner = THIS_MODULE;
	priv->rcdev.ops = &berlin_reset_ops;
	priv->rcdev.of_node = pdev->dev.of_node;
	priv->rcdev.of_reset_n_cells = 2;
	priv->rcdev.of_xlate = berlin_reset_xlate;

	return reset_controller_register(&priv->rcdev);
}

static const struct of_device_id berlin_reset_dt_match[] = {
	{ .compatible = "marvell,berlin2-reset" },
	{ },
};

static struct platform_driver berlin_reset_driver = {
	.probe	= berlin2_reset_probe,
	.driver	= {
		.name = "berlin2-reset",
		.of_match_table = berlin_reset_dt_match,
	},
};
builtin_platform_driver(berlin_reset_driver);
ux.org.uk/linux-net-next.git/commit/?id=b7683155517c09c7e0f9d791eaab6dab3b4b2477'>root</a>/<a href='/cgit/git.armlinux.org.uk/linux-net-next.git/commit/drivers?id=b7683155517c09c7e0f9d791eaab6dab3b4b2477'>drivers</a>/<a href='/cgit/git.armlinux.org.uk/linux-net-next.git/commit/drivers/net?id=b7683155517c09c7e0f9d791eaab6dab3b4b2477'>net</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='b7683155517c09c7e0f9d791eaab6dab3b4b2477'/><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>Edward Cree &lt;ecree@solarflare.com&gt;</td><td class='right'>2020-02-17 13:43:10 +0000</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2020-02-17 14:35:23 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='sha1'><a href='/cgit/git.armlinux.org.uk/linux-net-next.git/commit/drivers/net?id=b7683155517c09c7e0f9d791eaab6dab3b4b2477'>b7683155517c09c7e0f9d791eaab6dab3b4b2477</a> (<a href='/cgit/git.armlinux.org.uk/linux-net-next.git/patch/drivers/net?id=b7683155517c09c7e0f9d791eaab6dab3b4b2477'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='sha1'><a href='/cgit/git.armlinux.org.uk/linux-net-next.git/tree/?id=b7683155517c09c7e0f9d791eaab6dab3b4b2477'>cea3ca29b8db6619ce2b9f90695c919f0f3d1fd1</a> /<a href='/cgit/git.armlinux.org.uk/linux-net-next.git/tree/drivers/net?id=b7683155517c09c7e0f9d791eaab6dab3b4b2477'>drivers/net</a></td></tr>
<tr><th>parent</th><td colspan='2' class='sha1'><a href='/cgit/git.armlinux.org.uk/linux-net-next.git/commit/drivers/net?id=bd706ff8ea2b6e2d3f21f0863b2fc42f860f8ba2'>bd706ff8ea2b6e2d3f21f0863b2fc42f860f8ba2</a> (<a href='/cgit/git.armlinux.org.uk/linux-net-next.git/diff/drivers/net?id=b7683155517c09c7e0f9d791eaab6dab3b4b2477&amp;id2=bd706ff8ea2b6e2d3f21f0863b2fc42f860f8ba2'>diff</a>)</td></tr></table>
<div class='commit-subject'>sfc: only schedule asynchronous filter work if needed</div><div class='commit-msg'>Prevent excessive CPU time spent running a workitem with nothing to do.

We avoid any races by keeping the same check in efx_filter_rfs_expire().

Suggested-by: Martin Habets &lt;mhabets@solarflare.com&gt;
Signed-off-by: Edward Cree &lt;ecree@solarflare.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit/git.armlinux.org.uk/linux-net-next.git/diff/?id=b7683155517c09c7e0f9d791eaab6dab3b4b2477'>Diffstat</a> (limited to 'drivers/net')</div><table summary='diffstat' class='diffstat'>