Devicetree

* Re: [PATCH v2] ARM: dts: Add missing CPU frequencies for Exynos5422/5800
From: Markus Reichl @ 2016-12-15 13:55 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz, Krzysztof Kozlowski
  Cc: Kukjin Kim, Javier Martinez Canillas, Rob Herring, Mark Rutland,
	Russell King, Doug Anderson, Andreas Faerber, Thomas Abraham,
	Ben Gamari, Arjun K V, linux-samsung-soc, linux-arm-kernel,
	linux-pm, devicetree, linux-kernel
In-Reply-To: <10512254.nyUcL0zgTP@amdc3058>

Hi Bartlomiej,

Am 15.12.2016 um 12:55 schrieb Bartlomiej Zolnierkiewicz:
> Add missing 2000MHz & 1900MHz OPPs (for A15 cores) and 1400MHz OPP
> (for A7 cores).  Also update common Odroid-XU3 Lite/XU3/XU4 thermal
> cooling maps to account for new OPPs.
> 
> Since new OPPs are not available on all Exynos5422/5800 boards modify
> dts files for Odroid-XU3 Lite (limited to 1.8 GHz / 1.3 GHz) & Peach
> Pi (limited to 2.0 GHz / 1.3 GHz) accordingly.
> 
> Tested on Odroid-XU3 and XU3 Lite.
> 
> Cc: Doug Anderson <dianders@chromium.org>
> Cc: Javier Martinez Canillas <javier@osg.samsung.com>
> Cc: Andreas Faerber <afaerber@suse.de>
> Cc: Thomas Abraham <thomas.ab@samsung.com>
> Cc: Ben Gamari <ben@smart-cactus.org>
> Cc: Arjun K V <arjun.kv@samsung.com>
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> ---
> v2:
> - added comments about limitations of SoC revisions used by Odroid-XU3 Lite and
>   Peach Pi boards (suggested by Javier)
> - removed redundant opp_a7_14 label
> - added Arjun to Cc:
> 
> Javier, could you test it on Peach Pi board?
> 
>  arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi |   14 ++++++-------
>  arch/arm/boot/dts/exynos5422-odroidxu3-lite.dts    |   22 +++++++++++++++++++++
>  arch/arm/boot/dts/exynos5800-peach-pi.dts          |    9 ++++++++
>  arch/arm/boot/dts/exynos5800.dtsi                  |   15 ++++++++++++++
>  4 files changed, 53 insertions(+), 7 deletions(-)
> 
> Index: b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
> ===================================================================
> --- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi	2016-12-15 12:43:54.365955950 +0100
> +++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi	2016-12-15 12:43:54.361955949 +0100
> @@ -118,7 +118,7 @@
>  				/*
>  				 * When reaching cpu_alert3, reduce CPU
>  				 * by 2 steps. On Exynos5422/5800 that would
> -				 * be: 1600 MHz and 1100 MHz.
> +				 * (usually) be: 1800 MHz and 1200 MHz.
>  				 */
>  				map3 {
>  					trip = <&cpu_alert3>;
> @@ -131,16 +131,16 @@
>  
>  				/*
>  				 * When reaching cpu_alert4, reduce CPU
> -				 * further, down to 600 MHz (11 steps for big,
> -				 * 7 steps for LITTLE).
> +				 * further, down to 600 MHz (13 steps for big,
> +				 * 8 steps for LITTLE).
>  				 */
> -				map5 {
> +				cooling_map5: map5 {
>  					trip = <&cpu_alert4>;
> -					cooling-device = <&cpu0 3 7>;
> +					cooling-device = <&cpu0 3 8>;
>  				};
> -				map6 {
> +				cooling_map6: map6 {
>  					trip = <&cpu_alert4>;
> -					cooling-device = <&cpu4 3 11>;
> +					cooling-device = <&cpu4 3 13>;
>  				};
>  			};
>  		};
> Index: b/arch/arm/boot/dts/exynos5422-odroidxu3-lite.dts
> ===================================================================
> --- a/arch/arm/boot/dts/exynos5422-odroidxu3-lite.dts	2016-12-15 12:43:54.365955950 +0100
> +++ b/arch/arm/boot/dts/exynos5422-odroidxu3-lite.dts	2016-12-15 12:43:54.361955949 +0100
> @@ -21,6 +21,28 @@
>  	compatible = "hardkernel,odroid-xu3-lite", "samsung,exynos5800", "samsung,exynos5";
>  };
>  
> +/*
> + * Odroid XU3-Lite board uses SoC revision with lower maximum frequencies
> + * than Odroid XU3/XU4 boards: 1.8 GHz for A15 cores & 1.3 GHz for A7 cores.
> + * Therefore we need to update OPPs tables and thermal maps accordingly.
> + */
> +&cluster_a15_opp_table {
> +	/delete-node/opp@2000000000;
> +	/delete-node/opp@1900000000;
> +};
> +
> +&cluster_a7_opp_table {
> +	/delete-node/opp@1400000000;
> +};
> +
> +&cooling_map5 {
> +	cooling-device = <&cpu0 3 7>;
> +};
> +
> +&cooling_map6 {
> +	cooling-device = <&cpu4 3 11>;
> +};
> +
>  &pwm {
>  	/*
>  	 * PWM 0 -- fan
> Index: b/arch/arm/boot/dts/exynos5800-peach-pi.dts
> ===================================================================
> --- a/arch/arm/boot/dts/exynos5800-peach-pi.dts	2016-12-15 12:43:54.365955950 +0100
> +++ b/arch/arm/boot/dts/exynos5800-peach-pi.dts	2016-12-15 12:43:54.361955949 +0100
> @@ -146,6 +146,15 @@
>  	vdd-supply = <&ldo9_reg>;
>  };
>  
> +/*
> + * Peach Pi board uses SoC revision with lower maximum frequency for A7 cores
> + * (1.3 GHz instead of 1.4 GHz) than Odroid XU3/XU4 boards.  Thus we need to
> + * update A7 OPPs table accordingly.
> + */
> +&cluster_a7_opp_table {
> +	/delete-property/opp@1400000000;
> +};
> +
>  &cpu0 {
>  	cpu-supply = <&buck2_reg>;
>  };
> Index: b/arch/arm/boot/dts/exynos5800.dtsi
> ===================================================================
> --- a/arch/arm/boot/dts/exynos5800.dtsi	2016-12-15 12:43:54.365955950 +0100
> +++ b/arch/arm/boot/dts/exynos5800.dtsi	2016-12-15 12:43:54.361955949 +0100
> @@ -24,6 +24,16 @@
>  };
>  
>  &cluster_a15_opp_table {
> +	opp@2000000000 {
> +		opp-hz = /bits/ 64 <2000000000>;
> +		opp-microvolt = <1250000>;
> +		clock-latency-ns = <140000>;
> +	};
> +	opp@1900000000 {
> +		opp-hz = /bits/ 64 <1900000000>;
> +		opp-microvolt = <1250000>;
> +		clock-latency-ns = <140000>;
> +	};
>  	opp@1700000000 {
>  		opp-microvolt = <1250000>;
>  	};
> @@ -85,6 +95,11 @@
>  };
>  
>  &cluster_a7_opp_table {
> +	opp@1400000000 {
> +		opp-hz = /bits/ 64 <1400000000>;
> +		opp-microvolt = <1250000>;
> +		clock-latency-ns = <140000>;
> +	};
>  	opp@1300000000 {
>  		opp-microvolt = <1250000>;
>  	};
> 

On Odroid XU4, XU3 and XU3-lite:

Tested-by: Markus Reichl <m.reichl@fivetechno.de>

Thanks,
--
Markus Reichl

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