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Omar Ramirez Luna | 1 May 2012 19:47
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[PATCH 2/2] arm/dts: OMAP2+: Add mailbox nodes

Add nodes for mailbox DT, to interface with hwmods.

Signed-off-by: Omar Ramirez Luna <omar.luna <at> linaro.org>
---
 arch/arm/boot/dts/omap2.dtsi |    5 +++++
 arch/arm/boot/dts/omap3.dtsi |    5 +++++
 arch/arm/boot/dts/omap4.dtsi |    5 +++++
 3 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/arch/arm/boot/dts/omap2.dtsi b/arch/arm/boot/dts/omap2.dtsi
index f2ab4ea..2175cc3 100644
--- a/arch/arm/boot/dts/omap2.dtsi
+++ b/arch/arm/boot/dts/omap2.dtsi
 <at>  <at>  -46,6 +46,11  <at>  <at> 
 			#interrupt-cells = <1>;
 		};

+		mailbox: mailbox <at> 48094000 {
+			compatible = "ti,omap2-mailbox";
+			ti,hwmods = "mailbox";
+		};
+
 		uart1: serial <at> 4806a000 {
 			compatible = "ti,omap2-uart";
 			ti,hwmods = "uart1";
diff --git a/arch/arm/boot/dts/omap3.dtsi b/arch/arm/boot/dts/omap3.dtsi
index c612135..540f6d6 100644
--- a/arch/arm/boot/dts/omap3.dtsi
+++ b/arch/arm/boot/dts/omap3.dtsi
 <at>  <at>  -69,6 +69,11  <at>  <at>
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Omar Ramirez Luna | 1 May 2012 19:47
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[PATCH 1/2] OMAP: mailbox: add device tree support

Adapt driver to use DT if provided.

Signed-off-by: Omar Ramirez Luna <omar.luna <at> linaro.org>
---
 .../devicetree/bindings/arm/omap/mailbox.txt       |    9 +++++++++
 arch/arm/mach-omap2/devices.c                      |    3 +++
 arch/arm/mach-omap2/mailbox.c                      |   12 ++++++++++++
 3 files changed, 24 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/omap/mailbox.txt

diff --git a/Documentation/devicetree/bindings/arm/omap/mailbox.txt b/Documentation/devicetree/bindings/arm/omap/mailbox.txt
new file mode 100644
index 0000000..c57c0d5
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/omap/mailbox.txt
 <at>  <at>  -0,0 +1,9  <at>  <at> 
+OMAP Mailbox module
+
+Required properties:
+ compatible : should be "ti,omap2-mailbox" for OMAP2 mailbox
+ compatible : should be "ti,omap3-mailbox" for OMAP3 mailbox
+ compatible : should be "ti,omap4-mailbox" for OMAP4 mailbox
+
+Optional properties:
+ None
diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index e433603..7a78063 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
 <at>  <at>  -281,6 +281,9  <at>  <at>  static inline void __init omap_init_mbox(void)
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Omar Ramirez Luna | 1 May 2012 19:47
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[PATCH 0/2] OMAP: mailbox initial device tree support

To allow mailbox driver to function with device tree.

Tested in OMAP4 and OMAP3. OMAP2 untested.

Omar Ramirez Luna (2):
  OMAP: mailbox: add device tree support
  arm/dts: OMAP2+: Add mailbox nodes

 .../devicetree/bindings/arm/omap/mailbox.txt       |    9 +++++++++
 arch/arm/boot/dts/omap2.dtsi                       |    5 +++++
 arch/arm/boot/dts/omap3.dtsi                       |    5 +++++
 arch/arm/boot/dts/omap4.dtsi                       |    5 +++++
 arch/arm/mach-omap2/devices.c                      |    3 +++
 arch/arm/mach-omap2/mailbox.c                      |   12 ++++++++++++
 6 files changed, 39 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/omap/mailbox.txt

--

-- 
1.7.4.1

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Raghavendra K T | 1 May 2012 22:20
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Re: [PATCH RFC V6 1/5] kvm hypervisor : Add a hypercall to KVM hypervisor to support pv-ticketlocks

On 04/30/2012 01:14 PM, Raghavendra K T wrote:

>>> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
>>> index 4044ce0..7fc9be6 100644
>>> --- a/arch/x86/kvm/x86.c
>>> +++ b/arch/x86/kvm/x86.c
>>>  <at>  <at>  -2147,6 +2147,7  <at>  <at>  int kvm_dev_ioctl_check_extension(long ext)
>>> case KVM_CAP_ASYNC_PF:
>>> case KVM_CAP_GET_TSC_KHZ:
>>> case KVM_CAP_PCI_2_3:
>>> + case KVM_CAP_PV_UNHALT:
>>> r = 1;
>>> break;
>>> case KVM_CAP_COALESCED_MMIO:
>>
>> Redundant, since we can infer this from KVM_GET_SUPPORTED_CPUID. But
>> please indicate this in the documentation.
>>
>
> Ok. will mention that in documentation added for KVM_CAP_PV_UNHALT.
>

I think it is better to remove  KVM_CAP_PV_UNHALT itself and avoid
spamming CAP.. will do that in coming version.

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Bedia, Vaibhav | 2 May 2012 07:42
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RE: [PATCH 0/2] OMAP: mailbox initial device tree support

Hi Omar,

On Tue, May 01, 2012 at 23:17:38, Omar Ramirez Luna wrote:
> To allow mailbox driver to function with device tree.
> 
> Tested in OMAP4 and OMAP3. OMAP2 untested.
>

I think the mailbox code needs a cleanup similar to what you
had proposed earlier [1] before the device tree support is added.

We probably need to decide whether the number of mailbox sub-modules
should be part of hwmod attribute or come from device tree. IMO the
static allocation of the mailboxes is better suited in the device-tree
data.

Regards,
Vaibhav

[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2011-June/054582.html

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Raghavendra K T | 2 May 2012 12:08
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[PATCH RFC V8 11/17] xen/pvticketlock: Allow interrupts to be enabled while blocking

From: Jeremy Fitzhardinge <jeremy.fitzhardinge <at> citrix.com>

If interrupts were enabled when taking the spinlock, we can leave them
enabled while blocking to get the lock.

If we can enable interrupts while waiting for the lock to become
available, and we take an interrupt before entering the poll,
and the handler takes a spinlock which ends up going into
the slow state (invalidating the per-cpu "lock" and "want" values),
then when the interrupt handler returns the event channel will
remain pending so the poll will return immediately, causing it to
return out to the main spinlock loop.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge <at> citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk <at> oracle.com>
Signed-off-by: Raghavendra K T <raghavendra.kt <at> linux.vnet.ibm.com>
---
 arch/x86/xen/spinlock.c |   46 ++++++++++++++++++++++++++++++++++++++++------
 1 files changed, 40 insertions(+), 6 deletions(-)
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
index d4abaf9..3bf93d5 100644
--- a/arch/x86/xen/spinlock.c
+++ b/arch/x86/xen/spinlock.c
 <at>  <at>  -140,7 +140,20  <at>  <at>  static void xen_lock_spinning(struct arch_spinlock *lock, __ticket_t want)
 	 * partially setup state.
 	 */
 	local_irq_save(flags);
-
+	/*
+	 * We don't really care if we're overwriting some other
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Johan Hovold | 3 May 2012 12:26
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[PATCH v2 4/4] backlight: add LM3533 backlight driver

Add sub-driver for the backlights on National Semiconductor / TI LM3533
lighting power chips.

The chip provides 256 brightness levels and ambient-light-sensor and pwm
input control.

Signed-off-by: Johan Hovold <jhovold <at> gmail.com>
---

v2:
 - add sysfs-ABI documentation
 - open code max_current/pwm macros

 .../testing/sysfs-class-backlight-driver-lm3533    |   50 +++
 drivers/video/backlight/Kconfig                    |   12 +
 drivers/video/backlight/Makefile                   |    1 +
 drivers/video/backlight/lm3533_bl.c                |  458 ++++++++++++++++++++
 4 files changed, 521 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-driver-lm3533
 create mode 100644 drivers/video/backlight/lm3533_bl.c

diff --git a/Documentation/ABI/testing/sysfs-class-backlight-driver-lm3533 b/Documentation/ABI/testing/sysfs-class-backlight-driver-lm3533
new file mode 100644
index 0000000..866fd3e
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-backlight-driver-lm3533
 <at>  <at>  -0,0 +1,50  <at>  <at> 
+What:		/sys/class/backlight/≤backlight>/als
+Date:		April 2012
+KernelVersion:	3.5
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Johan Hovold | 3 May 2012 12:26
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[PATCH v2 1/4] mfd: add LM3533 lighting-power core driver

Add support for National Semiconductor / TI LM3533 lighting power chips.

This is the core driver which provides register access over I2C and
registers the ambient-light-sensor, LED and backlight sub-drivers.

Signed-off-by: Johan Hovold <jhovold <at> gmail.com>
---

v2:
 - add sysfs-ABI documentation
 - merge i2c implementation with core
 - use regmap and kill custom debugfs interface

 .../ABI/testing/sysfs-bus-i2c-devices-lm3533       |   38 +
 drivers/mfd/Kconfig                                |   13 +
 drivers/mfd/Makefile                               |    1 +
 drivers/mfd/lm3533-core.c                          |  717 ++++++++++++++++++++
 drivers/mfd/lm3533-ctrlbank.c                      |  134 ++++
 include/linux/mfd/lm3533.h                         |   89 +++
 6 files changed, 992 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533
 create mode 100644 drivers/mfd/lm3533-core.c
 create mode 100644 drivers/mfd/lm3533-ctrlbank.c
 create mode 100644 include/linux/mfd/lm3533.h

diff --git a/Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533 b/Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533
new file mode 100644
index 0000000..5700721
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533
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Johan Hovold | 3 May 2012 13:28
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Re: [PATCH v2 1/4] mfd: add LM3533 lighting-power core driver

On Thu, May 03, 2012 at 11:38:48AM +0100, Mark Brown wrote:
> On Thu, May 03, 2012 at 12:26:36PM +0200, Johan Hovold wrote:
> > Add support for National Semiconductor / TI LM3533 lighting power chips.
> > 
> > This is the core driver which provides register access over I2C and
> > registers the ambient-light-sensor, LED and backlight sub-drivers.
> 
> Reviwed-by: Mark Brown <broonie <at> opensource.wolfsonmicro.com>
> 
> though
> 
> > +	dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val);
> 
> I'd expect you can drop these log messages, if there's stuff like this
> missing we should add it to regmap.  At the minute the regmap logging is
> via trace points rather than debug logs as you can leave them enabled
> all the time.

If such debugging is added to regmap we still need a way to enable them
per driver (or rather regmap) to not clutter the logs.

These three dev_dbg statements are extremely useful during debugging /
development especially in combination with the other dynamic printks in
these drivers.

I'd actually prefer just keeping them for now.

> Might also be worth moving some of the sysfs stuff to live with the
> relevant drivers.
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Jonathan Cameron | 3 May 2012 13:40
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Re: [PATCH v2 2/4] iio: add LM3533 ambient light sensor driver

On 5/3/2012 11:26 AM, Johan Hovold wrote:
> Add sub-driver for the ambient light sensor interface on National
> Semiconductor / TI LM3533 lighting power chips.
>
> The sensor interface can be used to control the LEDs and backlights of
> the chip through defining five light zones and three sets of
> corresponding brightness target levels.
>
> The driver provides raw and mean adc readings along with the current
> light zone through sysfs. A threshold event can be generated on zone
> changes.
Code is fine.  Pretty much all my comments are to do with the interface.
>
> Signed-off-by: Johan Hovold<jhovold <at> gmail.com>
> ---
>
> v2:
>   - reimplement using iio
>   - add sysfs-ABI documentation
>
>
>   .../Documentation/sysfs-bus-iio-light-lm3533-als   |   62 ++
>   drivers/staging/iio/light/Kconfig                  |   16 +
>   drivers/staging/iio/light/Makefile                 |    1 +
>   drivers/staging/iio/light/lm3533-als.c             |  617 ++++++++++++++++++++
>   4 files changed, 696 insertions(+), 0 deletions(-)
>   create mode 100644 drivers/staging/iio/Documentation/sysfs-bus-iio-light-lm3533-als
>   create mode 100644 drivers/staging/iio/light/lm3533-als.c
>
> diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light-lm3533-als b/drivers/staging/iio/Documentation/sysfs-bus-iio-light-lm3533-als
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