[PATCH 1/2] device-tree: aqp8064.dtsi: Remove usb phy dr_mode = "host"

[PATCH 1/2] device-tree: aqp8064.dtsi: Remove usb phy dr_mode = "host"

[John Stultz]

Most 8064 devices have micro-usb ports for phy1, so setting
the dr_mode to host here seems incorrect.

Leaving it unspecified should default to otg, and then
any boards that wish to specify something else, can
override it in their dts file.

Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Andy Gross <agross-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Cc: Bjorn Andersson <bjorn.andersson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Stephen Boyd <stephen.boyd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Signed-off-by: John Stultz <john.stultz-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 arch/arm/boot/dts/qcom-apq8064.dtsi | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/boot/dts/qcom-apq8064.dtsi b/arch/arm/boot/dts/qcom-apq8064.dtsi
index 9dc83b0..7e43416 100644
--- a/arch/arm/boot/dts/qcom-apq8064.dtsi
+++ b/arch/arm/boot/dts/qcom-apq8064.dtsi
@@ -750,7 +750,6 @@
 			reg		= <0x12500000 0x400>;
 			interrupts	= <GIC_SPI 100 IRQ_TYPE_NONE>;
 			status		= "disabled";
-			dr_mode		= "host";
 
 			clocks		= <&gcc USB_HS1_XCVR_CLK>,
 					  <&gcc USB_HS1_H_CLK>;
-- 
1.9.1

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[PATCH 2/2] device-tree: nexus7: Add IMEM syscon and reboot reason support

[John Stultz]

This patch add the IMEM syscon memory region to the DT,
as well as addds support for the magic reboot reason
values that are written to the address for each mode.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Andy Gross <agross@codeaurora.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Cc: linux-arm-msm@vger.kernel.org
Cc: devicetree@vger.kernel.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts b/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
index 7b05f07..ff856c3 100644
--- a/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
+++ b/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
@@ -272,5 +272,19 @@
 				vqmmc-supply = <&pm8921_s4>;
 			};
 		};
+
+		imem@2a03f000 {
+			compatible = "syscon", "simple-mfd";
+			reg = <0x2a03f000 0x1000>;
+
+			reboot-mode {
+				compatible = "syscon-reboot-mode";
+				offset = <0x65c>;
+
+				mode-normal	= <0x77665501>;
+				mode-bootloader	= <0x77665500>;
+				mode-recovery	= <0x77665502>;
+			};
+		};
 	};
 };
-- 
1.9.1

Re: [PATCH 2/2] device-tree: nexus7: Add IMEM syscon and reboot reason support

[Bjorn Andersson]

On Mon 08 Aug 15:34 PDT 2016, John Stultz wrote:

> This patch add the IMEM syscon memory region to the DT,
> as well as addds support for the magic reboot reason
> values that are written to the address for each mode.
>

This looks good, double checked the addresses and magics. But I think
you should move the entire thing to qcom-apq8064.dtsi, as this is common
to the base platform.

And I would prefer if you updated the subject prefix...

With the move and subject update:
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Andy Gross <agross@codeaurora.org>
> Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
> Cc: Stephen Boyd <stephen.boyd@linaro.org>
> Cc: linux-arm-msm@vger.kernel.org
> Cc: devicetree@vger.kernel.org
> Signed-off-by: John Stultz <john.stultz@linaro.org>
> ---
>  arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts b/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
> index 7b05f07..ff856c3 100644
> --- a/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
> +++ b/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
> @@ -272,5 +272,19 @@
>  				vqmmc-supply = <&pm8921_s4>;
>  			};
>  		};
> +
> +		imem@2a03f000 {
> +			compatible = "syscon", "simple-mfd";
> +			reg = <0x2a03f000 0x1000>;
> +
> +			reboot-mode {
> +				compatible = "syscon-reboot-mode";
> +				offset = <0x65c>;
> +
> +				mode-normal	= <0x77665501>;
> +				mode-bootloader	= <0x77665500>;
> +				mode-recovery	= <0x77665502>;
> +			};
> +		};
>  	};
>  };
> -- 
> 1.9.1
> 

Re: [PATCH 2/2] device-tree: nexus7: Add IMEM syscon and reboot reason support

[John Stultz]

On Tue, Aug 9, 2016 at 9:28 PM, Bjorn Andersson
<bjorn.andersson@linaro.org> wrote:
> On Mon 08 Aug 15:34 PDT 2016, John Stultz wrote:
>
>> This patch add the IMEM syscon memory region to the DT,
>> as well as addds support for the magic reboot reason
>> values that are written to the address for each mode.
>>
>
> This looks good, double checked the addresses and magics. But I think
> you should move the entire thing to qcom-apq8064.dtsi, as this is common
> to the base platform.

Interesting, so do all 8064's use the same bootloader?

> And I would prefer if you updated the subject prefix...
>
> With the move and subject update:
> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

thanks!
-john

Re: [PATCH 2/2] device-tree: nexus7: Add IMEM syscon and reboot reason support

[Bjorn Andersson]

On Tue 09 Aug 22:04 PDT 2016, John Stultz wrote:

> On Tue, Aug 9, 2016 at 9:28 PM, Bjorn Andersson
> <bjorn.andersson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> wrote:
> > On Mon 08 Aug 15:34 PDT 2016, John Stultz wrote:
> >
> >> This patch add the IMEM syscon memory region to the DT,
> >> as well as addds support for the magic reboot reason
> >> values that are written to the address for each mode.
> >>
> >
> > This looks good, double checked the addresses and magics. But I think
> > you should move the entire thing to qcom-apq8064.dtsi, as this is common
> > to the base platform.
> 
> Interesting, so do all 8064's use the same bootloader?
> 

As far as I can tell, the APQ8064 comes with 4kb of IMEM, so that part
is common regardless.

There is no indication of the restart reason being "optional" in the
downstream kernel, but that's not necessarily a "yes" to your question.

So, please move it to the apq8064.dtsi, as there are no indications of
systems not having this setup. Worst case would be that I'm wrong and we
have to move it out to all current targets sometime in the future.

Regards,
Bjorn
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Re: [PATCH 1/2] device-tree: aqp8064.dtsi: Remove usb phy dr_mode = "host"

[Bjorn Andersson]

On Mon 08 Aug 15:34 PDT 2016, John Stultz wrote:

Changes in this file is commonly prefixed "ARM: dts: apq8064:", please
follow that. Perhaps:

ARM: dts: apq8064: Drop dr_mode property from usb phy

> Most 8064 devices have micro-usb ports for phy1, so setting
> the dr_mode to host here seems incorrect.
> 
> Leaving it unspecified should default to otg, and then
> any boards that wish to specify something else, can
> override it in their dts file.
> 
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Andy Gross <agross@codeaurora.org>
> Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
> Cc: Stephen Boyd <stephen.boyd@linaro.org>
> Cc: linux-arm-msm@vger.kernel.org
> Cc: devicetree@vger.kernel.org
> Signed-off-by: John Stultz <john.stultz@linaro.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
>  arch/arm/boot/dts/qcom-apq8064.dtsi | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/qcom-apq8064.dtsi b/arch/arm/boot/dts/qcom-apq8064.dtsi
> index 9dc83b0..7e43416 100644
> --- a/arch/arm/boot/dts/qcom-apq8064.dtsi
> +++ b/arch/arm/boot/dts/qcom-apq8064.dtsi
> @@ -750,7 +750,6 @@
>  			reg		= <0x12500000 0x400>;
>  			interrupts	= <GIC_SPI 100 IRQ_TYPE_NONE>;
>  			status		= "disabled";
> -			dr_mode		= "host";
>  
>  			clocks		= <&gcc USB_HS1_XCVR_CLK>,
>  					  <&gcc USB_HS1_H_CLK>;
> -- 
> 1.9.1
>