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SubjectRe: [PATCHv2 2/9] hwspinlock/omap: add support for dt nodes
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On Sep 27, 2013, at 11:21 AM, Suman Anna wrote:

> On 09/27/2013 11:06 AM, Kumar Gala wrote:
>>
>> On Sep 17, 2013, at 2:30 PM, Suman Anna wrote:
>>
>>> HwSpinlock IP is present only on OMAP4 and other newer SoCs,
>>> which are all device-tree boot only. This patch adds the
>>> base support for parsing the DT nodes, and removes the code
>>> dealing with the traditional platform device instantiation.
>>>
>>> Signed-off-by: Suman Anna <s-anna@ti.com>
>>> ---
>>> .../devicetree/bindings/hwlock/omap-hwspinlock.txt | 31 +++++++++++
>>> arch/arm/mach-omap2/Makefile | 3 --
>>> arch/arm/mach-omap2/hwspinlock.c | 60 ----------------------
>>> drivers/hwspinlock/omap_hwspinlock.c | 23 +++++++--
>>> 4 files changed, 50 insertions(+), 67 deletions(-)
>>> create mode 100644 Documentation/devicetree/bindings/hwlock/omap-hwspinlock.txt
>>> delete mode 100644 arch/arm/mach-omap2/hwspinlock.c
>>>
>>> diff --git a/Documentation/devicetree/bindings/hwlock/omap-hwspinlock.txt b/Documentation/devicetree/bindings/hwlock/omap-hwspinlock.txt
>>> new file mode 100644
>>> index 0000000..235b7c5
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/hwlock/omap-hwspinlock.txt
>>> @@ -0,0 +1,31 @@
>>> +OMAP4+ HwSpinlock Driver
>>> +========================
>>> +
>>> +Required properties:
>>> +- compatible: Currently supports only "ti,omap4-hwspinlock" for
>>> + OMAP44xx, OMAP54xx, AM33xx, AM43xx, DRA7xx SoCs
>>> +- reg: Contains the hwspinlock register address range (base
>>> + address and length)
>>> +- ti,hwmods: Name of the hwmod associated with the hwspinlock device
>>> +
>>> +Common hwlock properties:
>>> +The following describes the usage of the common hwlock properties (defined in
>>> +Documentation/devicetree/bindings/hwlock/hwlock.txt) on OMAP.
>>> +
>>> +- hwlock-base-id: There are currently no OMAP SoCs with multiple
>>> + hwspinlock devices. The OMAP driver uses a default
>>> + base id value of 0 for the locks present within the
>>> + single hwspinlock device on all SoCs.
>>> +- hwlock-num-locks: This property is not required on OMAP SoCs, since the
>>> + number of locks present within a device can be deduced
>>> + from the SPINLOCK_SYSSTATUS device register.
>>
>> If you are going to be explicit about this properties, you should probably be a bit more clear about them NOT being in the OMAP dts because of the reasons you specify.
>
> You mean on the hwlock-base-id? I wanted to document how these
> properties (do not) apply for OMAP, I will revise the text to be a bit
> more explicit. Thanks for the review.

I meant for both, I think slightly revised text will help.

- k

--
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation



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