/*
 * include/media/i2c/as3645a.h
 *
 * Copyright (C) 2008-2011 Nokia Corporation
 *
 * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#ifndef __AS3645A_H__
#define __AS3645A_H__

#include <media/v4l2-subdev.h>

#define AS3645A_NAME				"as3645a"
#define AS3645A_I2C_ADDR			(0x60 >> 1) /* W:0x60, R:0x61 */

#define AS3645A_FLASH_TIMEOUT_MIN		100000	/* us */
#define AS3645A_FLASH_TIMEOUT_MAX		850000
#define AS3645A_FLASH_TIMEOUT_STEP		50000

#define AS3645A_FLASH_INTENSITY_MIN		200	/* mA */
#define AS3645A_FLASH_INTENSITY_MAX_1LED	500
#define AS3645A_FLASH_INTENSITY_MAX_2LEDS	400
#define AS3645A_FLASH_INTENSITY_STEP		20

#define AS3645A_TORCH_INTENSITY_MIN		20	/* mA */
#define AS3645A_TORCH_INTENSITY_MAX		160
#define AS3645A_TORCH_INTENSITY_STEP		20

#define AS3645A_INDICATOR_INTENSITY_MIN		0	/* uA */
#define AS3645A_INDICATOR_INTENSITY_MAX		10000
#define AS3645A_INDICATOR_INTENSITY_STEP	2500

/*
 * as3645a_platform_data - Flash controller platform data
 * @set_power:	Set power callback
 * @vref:	VREF offset (0=0V, 1=+0.3V, 2=-0.3V, 3=+0.6V)
 * @peak:	Inductor peak current limit (0=1.25A, 1=1.5A, 2=1.75A, 3=2.0A)
 * @ext_strobe:	True if external flash strobe can be used
 * @flash_max_current:	Max flash current (mA, <= AS3645A_FLASH_INTENSITY_MAX)
 * @torch_max_current:	Max torch current (mA, >= AS3645A_TORCH_INTENSITY_MAX)
 * @timeout_max:	Max flash timeout (us, <= AS3645A_FLASH_TIMEOUT_MAX)
 */
struct as3645a_platform_data {
	int (*set_power)(struct v4l2_subdev *subdev, int on);
	unsigned int vref;
	unsigned int peak;
	bool ext_strobe;

	/* Flash and torch currents and timeout limits */
	unsigned int flash_max_current;
	unsigned int torch_max_current;
	unsigned int timeout_max;
};

#endif /* __AS3645A_H__ */
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/trace?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>trace</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>events</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events/oom.h?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>oom.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='bf29bddf0417a4783da3b24e8c9e017ac649326f'/><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>Jiri Kosina &lt;jkosina@suse.cz&gt;</td><td class='right'>2017-01-27 22:25:52 +0000</td></tr>
<tr><th>committer</th><td>Ingo Molnar &lt;mingo@kernel.org&gt;</td><td class='right'>2017-01-28 09:18:56 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events/oom.h?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>bf29bddf0417a4783da3b24e8c9e017ac649326f</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/trace/events/oom.h?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>54a05a4883b73f80e4e1d8c4b15750aa01c39932</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/trace/events/oom.h?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>include/trace/events/oom.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/trace/events/oom.h?id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>883af14e67e8b8702b5560aa64c888c0cd0bd66c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/trace/events/oom.h?id=bf29bddf0417a4783da3b24e8c9e017ac649326f&amp;id2=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>diff</a>)</td></tr></table>
<div class='commit-subject'>x86/efi: Always map the first physical page into the EFI pagetables</div><div class='commit-msg'>Commit:

  129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode")

stopped creating 1:1 mappings for all RAM, when running in native 64-bit mode.

It turns out though that there are 64-bit EFI implementations in the wild
(this particular problem has been reported on a Lenovo Yoga 710-11IKB),
which still make use of the first physical page for their own private use,
even though they explicitly mark it EFI_CONVENTIONAL_MEMORY in the memory
map.

In case there is no mapping for this particular frame in the EFI pagetables,
as soon as firmware tries to make use of it, a triple fault occurs and the
system reboots (in case of the Yoga 710-11IKB this is very early during bootup).

Fix that by always mapping the first page of physical memory into the EFI
pagetables. We're free to hand this page to the BIOS, as trim_bios_range()
will reserve the first page and isolate it away from memory allocators anyway.

Note that just reverting 129766708 alone is not enough on v4.9-rc1+ to fix the
regression on affected hardware, as this commit:

   ab72a27da ("x86/efi: Consolidate region mapping logic")

later made the first physical frame not to be mapped anyway.

Reported-by: Hanka Pavlikova &lt;hanka@ucw.cz&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
Signed-off-by: Matt Fleming &lt;matt@codeblueprint.co.uk&gt;
Cc: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Cc: Borislav Petkov &lt;bp@alien8.de&gt;
Cc: Borislav Petkov &lt;bp@suse.de&gt;
Cc: Laura Abbott &lt;labbott@redhat.com&gt;
Cc: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
Cc: Peter Zijlstra &lt;peterz@infradead.org&gt;
Cc: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Cc: Vojtech Pavlik &lt;vojtech@ucw.cz&gt;
Cc: Waiman Long &lt;waiman.long@hpe.com&gt;
Cc: linux-efi@vger.kernel.org
Cc: stable@kernel.org # v4.8+
Fixes: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode")
Link: http://lkml.kernel.org/r/20170127222552.22336-1-matt@codeblueprint.co.uk
[ Tidied up the changelog and the comment. ]
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>Diffstat</a> (limited to 'include/trace/events/oom.h')</div><table summary='diffstat' class='diffstat'>