Re: [PATCH 3/4] ARM: dts: da850-evm: enable cpufreq
From: David Lechner <david@lechnology.com>
Date: 2019-03-21 15:53:52
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linux-arm-kernel, lkml
On 3/21/19 9:10 AM, Bartosz Golaszewski wrote:
From: Bartosz Golaszewski <redacted> Enable cpufreq-dt support for da850-evm. The cvdd regulator is fixed at 1.2V on this board so disable the lower operating points and enable the 375MHz opp.
The board-da850-evm.c file seems to indicate that this regulator is variable and comes from the tps65070. This regulator seems to be missing from the device tree though, even though it has device tree bindings. Cc: Adam Ford
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Signed-off-by: Bartosz Golaszewski <redacted> --- arch/arm/boot/dts/da850-evm.dts | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts index f04bc3e15332..f63867692da4 100644 --- a/arch/arm/boot/dts/da850-evm.dts +++ b/arch/arm/boot/dts/da850-evm.dts@@ -151,6 +151,15 @@ system-clock-frequency = <24576000>; }; }; + + cvdd: regulator0 { + compatible = "regulator-fixed"; + regulator-name = "cvdd"; + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <1200000>; + regulator-always-on; + regulator-boot-on; + }; }; &ecap2 {@@ -191,6 +200,27 @@ }; }; +&cpu { + cpu-supply = <&cvdd>; +}; + +/* + * DA850-EVM has a fixed CVDD of 1.2V - we cannot go below 300MHz or + * above 375MHz. + */ + +&opp_100 { + status = "disabled"; +}; + +&opp_200 { + status = "disabled"; +}; + +&opp_375 { + status = "okay"; +}; + &sata { status = "okay"; };