[PATCH 0/2] ARM: dts: Some am43x fixes

[PATCH 0/2] ARM: dts: Some am43x fixes

[Dave Gerlach]

Hi,
This series has two fixes for am43x based platforms. First patch disables OPP50
on am437x-idk-evm which the board supply does not support. Second patch is for
am43x-epos-evm and adds dcdc2 regulator as the missing cpu0-supply which
enables CPUFreq on this platform.

Regards,
Dave

Dave Gerlach (2):
  ARM: dts: am437x-idk-evm: Disable OPP50 for MPU
  ARM: dts: am43x-epos-evm: Hook dcdc2 as the cpu0-supply

 arch/arm/boot/dts/am437x-idk-evm.dts | 14 ++++++++++++++
 arch/arm/boot/dts/am43x-epos-evm.dts |  4 ++++
 2 files changed, 18 insertions(+)

-- 
2.15.1

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[PATCH 1/2] ARM: dts: am437x-idk-evm: Disable OPP50 for MPU

[Dave Gerlach]

AM437x IDK has a TPS386000 supply voltage supervisor on the VDD_MPU rail
set to trigger undervoltage condition at 0.96V. Because of this, OPP50,
which is normally configured to 300MHz at 0.95V, must be disabled to
avoid triggering the undervoltage condition. Also mark OPP100 as the
suspend-opp as it is now our lowest OPP.

Signed-off-by: Dave Gerlach <d-gerlach-l0cyMroinI0@public.gmane.org>
---
 arch/arm/boot/dts/am437x-idk-evm.dts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/boot/dts/am437x-idk-evm.dts b/arch/arm/boot/dts/am437x-idk-evm.dts
index 5e364473067f..20132477a871 100644
--- a/arch/arm/boot/dts/am437x-idk-evm.dts
+++ b/arch/arm/boot/dts/am437x-idk-evm.dts
@@ -519,3 +519,17 @@
 &cpu {
 	cpu0-supply = <&tps>;
 };
+
+&cpu0_opp_table {
+	/*
+	 * Supply voltage supervisor on board will not allow opp50 so
+	 * disable it and set opp100 as suspend OPP.
+	 */
+	opp50@300000000 {
+		status = "disabled";
+	};
+
+	opp100@600000000 {
+		opp-suspend;
+	};
+};
-- 
2.15.1

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[PATCH 2/2] ARM: dts: am43x-epos-evm: Hook dcdc2 as the cpu0-supply

[Dave Gerlach]

Hook dcdc2 as the cpu0-supply.

Signed-off-by: Dave Gerlach <d-gerlach-l0cyMroinI0@public.gmane.org>
---
 arch/arm/boot/dts/am43x-epos-evm.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/boot/dts/am43x-epos-evm.dts b/arch/arm/boot/dts/am43x-epos-evm.dts
index a04d79ec212a..1c79c1f8ac07 100644
--- a/arch/arm/boot/dts/am43x-epos-evm.dts
+++ b/arch/arm/boot/dts/am43x-epos-evm.dts
@@ -989,3 +989,7 @@
 	assigned-clocks = <&mux_synctimer32k_ck>;
 	assigned-clock-parents = <&clkdiv32k_ick>;
 };
+
+&cpu {
+	cpu0-supply = <&dcdc2>;
+};
-- 
2.15.1

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Re: [PATCH 0/2] ARM: dts: Some am43x fixes

[Tony Lindgren]

* Dave Gerlach <d-gerlach-l0cyMroinI0@public.gmane.org> [171215 09:19]:
> Hi,
> This series has two fixes for am43x based platforms. First patch disables OPP50
> on am437x-idk-evm which the board supply does not support. Second patch is for
> am43x-epos-evm and adds dcdc2 regulator as the missing cpu0-supply which
> enables CPUFreq on this platform.

Applying both into omap-for-v4.16/dt thanks.

Tony
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