Andrew,
On 02/03/23 9:03 am, Ravi Gunasekaran wrote:
>
>
> On 01/03/23 9:27 pm, Andrew Davis wrote:
>> On 3/1/23 3:11 AM, Ravi Gunasekaran wrote:
>>> From: Aswath Govindraju <a-govindraju@xxxxxx>
>>>
>>> Add support for two instance of OSPI in J721S2 SoC.
>>>
>>> Reviewed-by: Vaishnav Achath <vaishnav.a@xxxxxx>
>>> Signed-off-by: Aswath Govindraju <a-govindraju@xxxxxx>
>>> Signed-off-by: Matt Ranostay <mranostay@xxxxxx>
>>> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@xxxxxx>
>>> ---
[...]
>>>
>>> .../boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi | 46 +++++++++++++++++++
>>> 1 file changed, 46 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
>>> index 0af242aa9816..ab3ce8be7216 100644
>>> --- a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
>>> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
>>> @@ -306,4 +306,50 @@
>>> ti,cpts-periodic-outputs = <2>;
>>> };
>>> };
>>> +
>>> + fss: bus@47000000 {
>>> + compatible = "simple-bus";
>>> + #address-cells = <2>;
>>> + #size-cells = <2>;
>>> + ranges = <0x00 0x47000000 0x00 0x47000000 0x00 0x00068400>,
>>> + <0x05 0x00000000 0x05 0x00000000 0x01 0x00000000>,
>>> + <0x07 0x00000000 0x07 0x00000000 0x01 0x00000000>;
>>> +
>>> + status = "disabled";
>>
>> Since this node doesn't need pinmux, why is it default disabled? Same for
>> the other parent nodes in this series.
>>
>> Andrew
>
> In this patch and others in this series, since child node is disabled,
> I thought of disabling the parent as well. And to later enable the
> parent node at the time when the child node needs to be enabled.
>
Could you please provide your input on this?
If the preferred way is to keep the parent node enabled, then I will
do so. For the IPs added in this series, if the parent node needs additional
information such as pinmux, gpio, I will disable both parent and child.
And if only child node(s) need additional info, then I will keep the parent
enabled and children disabled.
>>
>>> +
>>> + ospi0: spi@47040000 {
>>> + compatible = "ti,am654-ospi", "cdns,qspi-nor";
>>> + reg = <0x00 0x47040000 0x00 0x100>,
>>> + <0x05 0x00000000 0x01 0x00000000>;
>>> + interrupts = <GIC_SPI 840 IRQ_TYPE_LEVEL_HIGH>;
>>> + cdns,fifo-depth = <256>;
>>> + cdns,fifo-width = <4>;
>>> + cdns,trigger-address = <0x0>;
>>> + clocks = <&k3_clks 109 5>;
>>> + assigned-clocks = <&k3_clks 109 5>;
>>> + assigned-clock-parents = <&k3_clks 109 7>;
>>> + assigned-clock-rates = <166666666>;
>>> + power-domains = <&k3_pds 109 TI_SCI_PD_EXCLUSIVE>;
>>> + #address-cells = <1>;
>>> + #size-cells = <0>;
>>> +
>>> + status = "disabled"; /* Needs pinmux */
>>> + };
>>> +
>>> + ospi1: spi@47050000 {
>>> + compatible = "ti,am654-ospi", "cdns,qspi-nor";
>>> + reg = <0x00 0x47050000 0x00 0x100>,
>>> + <0x07 0x00000000 0x01 0x00000000>;
>>> + interrupts = <GIC_SPI 841 IRQ_TYPE_LEVEL_HIGH>;
>>> + cdns,fifo-depth = <256>;
>>> + cdns,fifo-width = <4>;
>>> + cdns,trigger-address = <0x0>;
>>> + clocks = <&k3_clks 110 5>;
>>> + power-domains = <&k3_pds 110 TI_SCI_PD_EXCLUSIVE>;
>>> + #address-cells = <1>;
>>> + #size-cells = <0>;
>>> +
>>> + status = "disabled"; /* Needs pinmux */
>>> + };
>>> + };
>>> };
>
--
Regards,
Ravi
