On Tuesday 15 October 2013 12:57 PM, Benoit Cousson wrote:
> Hi Rajendra,
>
> On 09/10/2013 18:45, Benoit Cousson wrote:
>> + A couple of DT maintainers
>>
>> On 09/10/2013 18:41, Rajendra Nayak wrote:
>>> On Wednesday 09 October 2013 08:43 PM, Benoit Cousson wrote:
>>>> Hi Rajendra,
>>>>
>>>> On 09/10/2013 12:11, Rajendra Nayak wrote:
>>>>> On OMAP we have co-processor IPs, memory controllers,
>>>>> GPIOs which control regulators and power switches to
>>>>> PMIC, and SoC internal Bus IPs, some or most of which
>>>>> should either not be reset or idled or both at init.
>>>>> (In some cases there are erratas which prevent an IP
>>>>> from being reset)
>>>>> Have a way to pass this information from DT.
>>>>
>>>> Did you get some acked-by from the DT maintainers?
>>>> Every new bindings must be carefully reviewed now.
>>>
>>> Nope, I haven't. The patches are on the list for a couple
>>> of months now.
>>
>> Let's see if Mark and Rob are OK with that.
>
> OK, I've just applied it after a small change in the subject:
>
> ARM: dts: omap: Add reset/idle on init bindings for OMAP
>
> Is that OK for you?
Yes, sounds good. Thanks Benoit.
>
> Thanks,
> Benoit
>
>>
>> Thanks,
>> Benoit
>>
>>>
>>>>
>>>> Regards,
>>>> Benoit
>>>>
>>>>>
>>>>> Update the am33xx/omap4 and omap5 dtsi files with the
>>>>> new bindings for modules which either should not be
>>>>> idled. reset or both. A later patch would cleanup the
>>>>> same information that exists today as part of the hwmod
>>>>> data files.
>>>>>
>>>>> Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
>>>>> ---
>>>>> .../devicetree/bindings/arm/omap/omap.txt | 3 ++-
>>>>> arch/arm/boot/dts/am33xx.dtsi | 2 ++
>>>>> arch/arm/boot/dts/omap4.dtsi | 3 +++
>>>>> arch/arm/boot/dts/omap5.dtsi | 2 ++
>>>>> 4 files changed, 9 insertions(+), 1 deletion(-)
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/arm/omap/omap.txt
>>>>> b/Documentation/devicetree/bindings/arm/omap/omap.txt
>>>>> index 91b7049..808c154 100644
>>>>> --- a/Documentation/devicetree/bindings/arm/omap/omap.txt
>>>>> +++ b/Documentation/devicetree/bindings/arm/omap/omap.txt
>>>>> @@ -21,7 +21,8 @@ Required properties:
>>>>> Optional properties:
>>>>> - ti,no_idle_on_suspend: When present, it prevents the PM to idle
>>>>> the module
>>>>> during suspend.
>>>>> -
>>>>> +- ti,no-reset-on-init: When present, the module should not be reset
>>>>> at init
>>>>> +- ti,no-idle-on-init: When present, the module should not be idled
>>>>> at init
>>>>>
>>>>> Example:
>>>>>
>>>>> diff --git a/arch/arm/boot/dts/am33xx.dtsi
>>>>> b/arch/arm/boot/dts/am33xx.dtsi
>>>>> index f9c5da9..ec33ea0 100644
>>>>> --- a/arch/arm/boot/dts/am33xx.dtsi
>>>>> +++ b/arch/arm/boot/dts/am33xx.dtsi
>>>>> @@ -607,6 +607,7 @@
>>>>> reg = <0x44d00000 0x4000 /* M3 UMEM */
>>>>> 0x44d80000 0x2000>; /* M3 DMEM */
>>>>> ti,hwmods = "wkup_m3";
>>>>> + ti,no-reset-on-init;
>>>>> };
>>>>>
>>>>> elm: elm@48080000 {
>>>>> @@ -637,6 +638,7 @@
>>>>> gpmc: gpmc@50000000 {
>>>>> compatible = "ti,am3352-gpmc";
>>>>> ti,hwmods = "gpmc";
>>>>> + ti,no-idle-on-init;
>>>>> reg = <0x50000000 0x2000>;
>>>>> interrupts = <100>;
>>>>> gpmc,num-cs = <7>;
>>>>> diff --git a/arch/arm/boot/dts/omap4.dtsi
>>>>> b/arch/arm/boot/dts/omap4.dtsi
>>>>> index 22d9f2b..e8fe797 100644
>>>>> --- a/arch/arm/boot/dts/omap4.dtsi
>>>>> +++ b/arch/arm/boot/dts/omap4.dtsi
>>>>> @@ -214,6 +214,7 @@
>>>>> gpmc,num-cs = <8>;
>>>>> gpmc,num-waitpins = <4>;
>>>>> ti,hwmods = "gpmc";
>>>>> + ti,no-idle-on-init;
>>>>> };
>>>>>
>>>>> uart1: serial@4806a000 {
>>>>> @@ -492,6 +493,7 @@
>>>>> reg = <0x4c000000 0x100>;
>>>>> interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>;
>>>>> ti,hwmods = "emif1";
>>>>> + ti,no-idle-on-init;
>>>>> phy-type = <1>;
>>>>> hw-caps-read-idle-ctrl;
>>>>> hw-caps-ll-interface;
>>>>> @@ -503,6 +505,7 @@
>>>>> reg = <0x4d000000 0x100>;
>>>>> interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>;
>>>>> ti,hwmods = "emif2";
>>>>> + ti,no-idle-on-init;
>>>>> phy-type = <1>;
>>>>> hw-caps-read-idle-ctrl;
>>>>> hw-caps-ll-interface;
>>>>> diff --git a/arch/arm/boot/dts/omap5.dtsi
>>>>> b/arch/arm/boot/dts/omap5.dtsi
>>>>> index 7cdea1b..a9d49df 100644
>>>>> --- a/arch/arm/boot/dts/omap5.dtsi
>>>>> +++ b/arch/arm/boot/dts/omap5.dtsi
>>>>> @@ -607,6 +607,7 @@
>>>>> emif1: emif@0x4c000000 {
>>>>> compatible = "ti,emif-4d5";
>>>>> ti,hwmods = "emif1";
>>>>> + ti,no-idle-on-init;
>>>>> phy-type = <2>; /* DDR PHY type: Intelli PHY */
>>>>> reg = <0x4c000000 0x400>;
>>>>> interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>;
>>>>> @@ -618,6 +619,7 @@
>>>>> emif2: emif@0x4d000000 {
>>>>> compatible = "ti,emif-4d5";
>>>>> ti,hwmods = "emif2";
>>>>> + ti,no-idle-on-init;
>>>>> phy-type = <2>; /* DDR PHY type: Intelli PHY */
>>>>> reg = <0x4d000000 0x400>;
>>>>> interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>;
>>>>>
>>>>
>>>
>>
>
>
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