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.
>
> 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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