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Suggested-by: Sean McNeil <sean@mcneil.com>
To see if some subtle race is involved, Sean has tried
removing syslog traffic during resume and found he was
not seeing the resume crash any more. We're giving it
a try to see if it changes the behaviour for anyone
else. It would mean we have a pretty fine race in there
somewhere.
Signed-off-by: Andy Green <andy@openmoko.com>
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We at least always enabled backlight on resume, this patch
changes us to set backlight back to last requested backlight
brightness level on resume. Note it means that you can
resume with screen blanked, but it should come back if that
happened with touchscreen action as usual.
/sys/class/backlight/pcf50633-bl/actual_brightness
and
/sys/class/backlight/pcf50633-bl/brightness
seem to agree after resume when reportedly they didn't before.
Signed-off-by: Andy Green <andy@openmoko.com>
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This patch adds a sysfs node:
/sys/class/i2c-adapter/i2c-0/0-0073/force_usb_limit_dangerous
it allows to force the charging limit regardless of the one chosen
by pcf50633 kernel driver. As such, if you write a charging limit
here that is not suitable for the power source, and the power source
is not current limited on its side, it could draw more current than
your power source can handle, burn down you house, etc.
If you're certain that your power supply can handle it, you can use
this on your own responsibility to make the amount drawn by the
PMU match what you believed your power supply could handle.
Example usage, in case where you have a dumb 500mA USB charger that
does not have the ID resistor:
# cat /sys/class/i2c-adapter/i2c-0/0-0073/charger_type
host/500mA usb mode 100mA <=== dumb charger does not ennumerate us
# echo 500 > /sys/class/i2c-adapter/i2c-0/0-0073/force_usb_limit_dangerous
# cat /sys/class/i2c-adapter/i2c-0/0-0073/charger_type
host/500mA usb mode 500mA
Signed-off-by: Andy Green <andy@openmoko.com>
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We leave SECOND unmasked on resume, it's like the
situation at probe() time, but there it makes us
turn SECOND off after coldplug action. So we need
to act like after that has happened, not exactly
like what we do at probe / init time.
Signed-off-by: Andy Green <andy@openmoko.com>
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Subject: [PATCH] [pcf50633] Avoid ooops on start with inserted usb cable
The pcf50633_global might not be initialized when we get the first
usb interrupt. We would oops inside the dev_err because we made up
a struct device.
Signed-Off-By: Holger Freyther <zecke@openmoko.org>
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Subject: [PATCH] [pcf50633] Report more events to userspace using the default callback
Signed-Off-By: Holger Freyther <zecke@openmoko.org>
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Subject: [PATCH] [battery] Make the bq27000 send an uevent when the charging state possible changed
Remove the todo entries from the pcf50633, make the mach-gta02
call the bq27000 driver from the pmu callback.
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Subject: [PATCH] [janitor] make checkpatch.pl happy
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Signed-off-by: Andy Green <andy@openmoko.com>
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Everywhere in the sources except the probe function the context
pointer is called "pcf"... in there it's called "data" for some
reason. This stops confusion by changing it to be "pcf" in there
as well.
Signed-off-by: Andy Green <andy@openmoko.com>
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pcf50633.c shouldn't know GTAxx at all. Move to using a
platform callback to allow definition of platform devices
with pcf50633 as parent device (good for enforcing suspend /
resume ordering). Remove all code references to GTAxx from
the sources (one string left for compatability).
Signed-off-by: Andy Green <andy@openmoko.com>
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Signed-off-by: Andy Green <andy@openmoko.com>
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Backlight wasn't off by default on resume, so it was never really
deferred (until LCM is initialized). This fixes that and so removes
the brief white screen between pcf50633 resume and LCM init.
Signed-off-by: Andy Green <andy@openmoko.com>
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Disable pcf interrupt (not for wake, just as interrupt) in
suspend, re-enable it again just before we force-call the
workqueue function at end of pcf resume, which leads to
pcf interrupt source registers getting cleared so it can
signal an interrupt normally again.
This change ends the uncontrolled appearance of pcf interrupts
during resume time which previously caused the work to attempt
to use the I2C stuff before i2c host device had itself resumed.
Now the isr work is only queued, and the isr work function called,
definitively after pcf resume completes.
In suspend time, the work function may have been queued some
time before and be pending, and it could still show up at a
bad time. Therefore if the work function sees that it is
coming since the start of pcf50633 suspend function, it
aborts without attempting to read the pcf interrupt regs,
leaving them for resume to take care of.
USB current limit and no battery work functions are also made
aware of suspend state and act accordingly.
Lastly I noticed that in early resume, i2c_get_clientdata(&pcf->client)
returns NULL, presumably because i2c device is still suspended. This
could easily make trouble for async events like interrupt work,
since pcf pointer is the client data. Disabling appearance of the
work until after pcf50633 resume will also avoid that.
Signed-off-by: Andy Green <andy@openmoko.com>
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Use an enum to define pcf50633 suspend / resume state.
Add PCF50633_SS_RESUMING_BUT_NOT_US_YET to be the state
early in resume: add platform driver resume function just
to set this state so we can differentiate between early
resume and late suspend.
Signed-off-by: Andy Green <andy@openmoko.com>
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Signed-off-by: Andy Green <andy@openmoko.com>
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mach-gta02 meddles with the regulator platform struct after
it is defined, leading to LCM power getting lost in suspend
despite I set it to be left up. Fixing this finally removes
the incredibly stubborn white LCM on suspend "flash".
This is also going to be implicated in Sean McNeil's
experience of monochromatic LCM after resume, which was
previously attacked by resetting and re-initing the LCM
from scratch.
In addition, I realized that we take down core_1v3 in
pcf50633 suspend action, this is happening near the
start of suspend, so we are in a meta-race to finish
suspend in a controlled way before the caps on core_1v3
run out (I only saw 23.3uF total). If it's true, this
is where the weirdo sensitivity to timing during
suspend is coming from.
Therefore in this patch we also remove sleeps and
dev_info() etc (which have to flush on serial console)
from the pc50633 isr workqueue if we are in pcf50633
driver suspend state 1, ie, suspending... because we
don't have time for it.
Signed-off-by: Andy Green <andy@openmoko.com>
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Sean McNeil reports that he doesn't get pcf50633 interrupts any
more after resume. This adds back the call to ISR work in
the resume, removal of which is probably to do with it.
Signed-off-by: Andy Green <andy@openmoko.com>
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Signed-off-by: Andy Green <andy@openmoko.com>
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pcf50633 needs to take responsibility for managing current limit
changes asycnhrnously, ie, from USB stack enumeration. It's a feature of
pcf50633 not mach-gta02.c, and we can do better with taking care about
keeping it from firing at a bad time in there too.
Signed-off-by: Andy Green <andy@openmoko.com>
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Simplify and speed up bulk sequential I2C actions in pcf50633
the time savings are pretty considerable and so is the simplification
Signed-off-by: Andy Green <andy@openmoko.com>
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More pcf50633 major time saving by using i2c bulk autoincrement. Code
reduction too by using array for time elements.
Signed-off-by: Andy Green <andy@openmoko.com>
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Improve pcf50633 interrupt service scheduling to enforce only servicing
when resume action is completed
Signed-off-by: Andy Green <andy@openmoko.com>
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After protecting pcf50633 read and write primitives against
operation after suspend or before resume (by blowing a
stack_trace()) I saw glamo-mci was trying to use pcf50633
at these bad times on its own suspend and resume. Since that
part was already done via platform callback, I added an
export in pcf50633 that tells you if it is ready or busy,
and used it to defer (resume power on case) or ignore
(suspend power off case, since pcf50633 already did it)
the mci power call.
Signed-off-by: Andy Green <andy@openmoko.com>
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- speed up suspend and resume by using one hit i2c bulk transactions
- don't bother storing int mask set on suspend, the default one is
what we use anyway
- put stack_trace() on pcf50633 low level access that fire if we
try to touch them before we resumed
- cosmetic source cleanup
- reduces resume time for pcf50633 from 450ms to 255ms
Signed-off-by: Andy Green <andy@openmoko.com>
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Adds the resume callback stuff to glamo, then changes
jbt6k74 to no longer use a sleeping workqueue, but to
make its resume actions dependent on pcf50633 and
glamo resume (for backlight and communication to LCM
respectively)
Signed-off-by: Andy Green <andy@openmoko.com>
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Adds resume dependency support to pcf50633
Signed-off-by: Andy Green <andy@openmoko.com>
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Creates a new behaviour requested by Will that the red LED on GTA02
is lit during battery charging.and goes out when the battery is full.
This is done by leveraging the PMU interrupts, but in one scenario
there is no interrupt that occurs, when the battery is replaced after
being removed with the USB power in all the while. So a sleepy work
function is started under those circumstances to watch for battery
reinsertion or USB cable pull.
100mA limit was not being observed under some conditions so this was
fixed and tested with a USB cable with D+/D- disconnected. 1A
charger behaviour was also tested.
Showing the charging action exposes some inconsistency in pcf50633
charging action. If your battery is nearly full, it will keep
charging it at decreasing current even after it thinks it is at
100% capacity for a long while. But if you pull that same battery
and re-insert it, the charger state machine in pcf50633 believe it is
full and won't charge it.
Signed-off-by: Andy Green <andy@openmoko.com>
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From 0b9bae6aed5268707b348e48a01411ba420844e1 Mon Sep 17 00:00:00 2001
From: Holger Freyther <zecke@openmoko.org>
Date: Tue, 27 May 2008 14:41:35 +0200
Subject: [PATCH] [janitor] Fix possible null pointer dereference
Judging by the control flow of the resume method i2c->suspended++ could
lead to a null pointer dereference.
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Currently we are willing to wake from sleep from
pcf50633 interrupts we don't actually do anything about
even when we wake (somewhat puzzled).
Let's disable some of these wake sources.
Signed-off-by: Andy Green <andy@openmoko.com>
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If you have U-Boot with uboot-add-find-wake-reason.patch, this
patch will get you a wake reason report from
cat /sys/devices/platform/neo1973-resume.0/resume_reason
it looks like this:
EINT00_ACCEL1
EINT01_GSM
EINT02_BLUETOOTH
EINT03_DEBUGBRD
EINT04_JACK
EINT05_WLAN
EINT06_AUXKEY
EINT07_HOLDKEY
EINT08_ACCEL2
* EINT09_PMU
adpins
adprem
usbins
usbrem
rtcalarm
second
onkeyr
onkeyf
exton1r
exton1f
exton2r
exton2f
exton3r
exton3f
* batfull
chghalt
thlimon
thlimoff
usblimon
usblimoff
adcrdy
onkey1s
lowsys
lowbat
hightmp
autopwrfail
dwn1pwrfail
dwn2pwrfail
ledpwrfail
ledovp
ldo1pwrfail
ldo2pwrfail
ldo3pwrfail
ldo4pwrfail
ldo5pwrfail
ldo6pwrfail
hcidopwrfail
hcidoovl
EINT10_NULL
EINT11_NULL
EINT12_GLAMO
EINT13_NULL
EINT14_NULL
EINT15_NULL
This shows a problem, false wake from suspend due to battery full
Signed-off-by: Andy Green <andy@openmoko.com>
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This patch improves the smoothness of suspend and resume action.
Taking out CONFIG_PM_DEBUG allows much more rapid resume (the low level
serial traffic appears to be synchronous)
Added a platform callback in jbt driver and support in pcf50633 so we
can defer bringing up the backlight until the LCM is able to process
video again (which must happen after the glamo is up and producing
video beacuse the LCM is hooked to glamo SPI)
GTA01 should not be affected by all this as the callback will default
to null and it is on pcf50606
Signed-off-by: Andy Green <andy@openmoko.com>
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I don't know what device the symlink should be linked
against on GTA01, somebody that does know needs to edit
it in where it says "FIXME"... I think the supplied method
can work OK otherwise.
Signed-off-by: Andy Green <andy@openmoko.com>
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struct input_dev in include/linux/input.h used to have a union
cdev which contained the associated device struct pointer. This
got simplified out in 2.6.25, so this patch removes cdev from
our drivers that used it before.
Signed-off-by: Andy Green <andy@openmoko.com>
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GTA01 -only
Restore power button functionality after resume operation
Per Werner's suggestion, run the PMU interrupt handler immediately after resume
to clear/handle any pending interrupts from that device. This appears to
resolve the dead-powerbutton-after-resume problem. This is not well-tested;
need feedback to see if there are any side-effects or other problems.
From BZ 1313
Signed-off-by: Mike Wester <mwester@dis.net>
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Signed-Off-By: Holger Freyther <zecke@openmoko.org>
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Hey,
the legacy application 'atd' from Russ Nelson/Nils Faerber, used by Qtopia, to
schedule alarms currently fails to start as the the above ioctl is failing.
The other drivers in drivers/rtc implement the above ioctl and we can
implement it too.
The code to mask/unmask the RTC alarm is copied from the set_alarm routine and
adapted to use the reg_set_bit_mask and reg_set_clear_mask.
It is compiling, so it must work. Please welcome me the lkml way ;)
Signed-Off-by: Holger Hans Peter Freyther <zecke@openmoko.org>
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We don't take care to stop driving generated USB host power even
when we have a 1A charger connected on the same pins.
Signed-off-by: Andy Green <andy@openmoko.com>
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--- linux-2.6.22/drivers/i2c/chips/pcf50606.c.orig 2008-01-17 22:30:16.000000000 -0800
+++ linux-2.6.22/drivers/i2c/chips/pcf50606.c 2008-01-17 22:31:43.000000000 -0800
@@ -71,12 +71,19 @@
I2C_CLIENT_INSMOD_1(pcf50606);
-#define PCF50606_F_CHG_FAST 0x00000001 /* Charger Fast allowed */
-#define PCF50606_F_CHG_PRESENT 0x00000002 /* Charger present */
-#define PCF50606_F_CHG_FOK 0x00000004 /* Fast OK for battery */
-#define PCF50606_F_CHG_ERR 0x00000008 /* Charger Error */
-#define PCF50606_F_CHG_PROT 0x00000010 /* Charger Protection */
-#define PCF50606_F_CHG_READY 0x00000020 /* Charging completed */
+#define PCF50606_B_CHG_FAST 0 /* Charger Fast allowed */
+#define PCF50606_B_CHG_PRESENT 1 /* Charger present */
+#define PCF50606_B_CHG_FOK 2 /* Fast OK for battery */
+#define PCF50606_B_CHG_ERR 3 /* Charger Error */
+#define PCF50606_B_CHG_PROT 4 /* Charger Protection */
+#define PCF50606_B_CHG_READY 5 /* Charging completed */
+
+#define PCF50606_F_CHG_FAST (1<<PCF50606_B_CHG_FAST) /* Charger Fast allowed */
+#define PCF50606_F_CHG_PRESENT (1<<PCF50606_B_CHG_PRESENT) /* Charger present */
+#define PCF50606_F_CHG_FOK (1<<PCF50606_B_CHG_FOK) /* Fast OK for battery */
+#define PCF50606_F_CHG_ERR (1<<PCF50606_B_CHG_ERR) /* Charger Error */
+#define PCF50606_F_CHG_PROT (1<<PCF50606_B_CHG_PROT) /* Charger Protection */
+#define PCF50606_F_CHG_READY (1<<PCF50606_B_CHG_READY) /* Charging completed */
#define PCF50606_F_CHG_MASK 0x000000fc
#define PCF50606_F_PWR_PRESSED 0x00000100
@@ -1026,12 +1033,12 @@
static DEVICE_ATTR(chgmode, S_IRUGO | S_IWUSR, show_chgmode, set_chgmode);
static const char *chgstate_names[] = {
- [PCF50606_F_CHG_FAST] = "fast_enabled",
- [PCF50606_F_CHG_PRESENT] = "present",
- [PCF50606_F_CHG_FOK] = "fast_ok",
- [PCF50606_F_CHG_ERR] = "error",
- [PCF50606_F_CHG_PROT] = "protection",
- [PCF50606_F_CHG_READY] = "ready",
+ [PCF50606_B_CHG_FAST] = "fast_enabled",
+ [PCF50606_B_CHG_PRESENT] = "present",
+ [PCF50606_B_CHG_FOK] = "fast_ok",
+ [PCF50606_B_CHG_ERR] = "error",
+ [PCF50606_B_CHG_PROT] = "protection",
+ [PCF50606_B_CHG_READY] = "ready",
};
static ssize_t show_chgstate(struct device *dev, struct device_attribute *attr,
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Moved shared PMU code from pcf50606.h and pcf50633.h (which prevented inclusion
of both at the same time) to pcf506xx.h
- include/linux/pcf50606.h (struct pmu_voltage_rail, enum pmu_event, pmu_cb):
moved to pcf506xx.h
- include/linux/pcf50633.h (struct pmu_voltage_rail, enum pmu_event, pmu_cb):
moved to pcf506xx.h
Signed off-by: Werner Almesberger <werner@openmoko.org>
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We need this stupid workaround since our amplifier chip uses a 'reserved' I2C
address
Signed-off-by: Harald Welte <laforge@openmoko.org>
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This is a NXP PCF50606 power management unit driver.
The PCF50606 is used in the FIC/OpenMoko Neo1973 GTA01 GSM phone.
Signed-off-by: Harald Welte <laforge@openmoko.org>
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fix-i2c-s3c2410-resume-race.patch
There is a nasty race between i2c-s3c2410 resume and resume of I2C
driver and the client drivers -- the watchdog device actually gets to
use the dead I2C bus before it is reinitialized by the I2C driver
resume! This patch makes sure any customers get turned away until
the shopkeeper has woken up.
Signed-off-by: Andy Green <andy@openmoko.com>
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