diff mbox series

[v2,2/2] ARM: dts: exynos: Adjust bus related OPPs to the values correct for Odroids

Message ID 20191219105130.29394-3-m.szyprowski@samsung.com (mailing list archive)
State Accepted
Delegated to: Chanwoo Choi
Headers show
Series Exynos5422: fix bus related OPPs for Odroid XU3/XU4/HC1 | expand

Commit Message

Marek Szyprowski Dec. 19, 2019, 10:51 a.m. UTC 
Hardkernel's Odroid XU3/XU4/HC1 boards use bootloader, which configures top
PLLs to the following values: MPLL: 532MHz, CPLL: 666MHz and DPLL: 600MHz.

Adjust all bus related OPPs to the values that are possible to derive from
the top PLL configured by the bootloader. Also add a comment for each bus
describing which PLL is used for it.

The most significant change is the highest rate for wcore bus. It has been
increased to 532MHz as this is the value configured initially by the
bootloader. Also the voltage for this OPP is changed to match the value
set by the bootloader.

This patch finally allows the buses to operate on the rates matching the
values set for each OPP and fixes the following warnings observed on boot:

exynos-bus: new bus device registered: soc:bus_wcore ( 84000 KHz ~ 400000 KHz)
exynos-bus: new bus device registered: soc:bus_noc ( 67000 KHz ~ 100000 KHz)
exynos-bus: new bus device registered: soc:bus_fsys_apb (100000 KHz ~ 200000 KHz)
...
exynos-bus soc:bus_wcore: dev_pm_opp_set_rate: failed to find current OPP for freq 532000000 (-34)
exynos-bus soc:bus_noc: dev_pm_opp_set_rate: failed to find current OPP for freq 111000000 (-34)
exynos-bus soc:bus_fsys_apb: dev_pm_opp_set_rate: failed to find current OPP for freq 222000000 (-34)

The problem with setting incorrect (in some cases much lower) clock rate
for the defined OPP were there from the beginning, but went unnoticed
because the only way to observe it was to manually check the rate of the
respective clocks. The commit 4294a779bd8d ("PM / devfreq: exynos-bus:
Convert to use dev_pm_opp_set_rate()") finally revealed it, because it
enabled use of the generic code from the OPP framework, which issues the
above mentioned warnings.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
---
 arch/arm/boot/dts/exynos5422-odroid-core.dtsi | 76 +++++++++++--------
 1 file changed, 45 insertions(+), 31 deletions(-)

Comments

Krzysztof Kozlowski Dec. 19, 2019, 8:24 p.m. UTC | #1 
On Thu, Dec 19, 2019 at 11:51:30AM +0100, Marek Szyprowski wrote:
> Hardkernel's Odroid XU3/XU4/HC1 boards use bootloader, which configures top
> PLLs to the following values: MPLL: 532MHz, CPLL: 666MHz and DPLL: 600MHz.
> 
> Adjust all bus related OPPs to the values that are possible to derive from
> the top PLL configured by the bootloader. Also add a comment for each bus
> describing which PLL is used for it.
> 
> The most significant change is the highest rate for wcore bus. It has been
> increased to 532MHz as this is the value configured initially by the
> bootloader. Also the voltage for this OPP is changed to match the value
> set by the bootloader.
> 
> This patch finally allows the buses to operate on the rates matching the
> values set for each OPP and fixes the following warnings observed on boot:
> 
> exynos-bus: new bus device registered: soc:bus_wcore ( 84000 KHz ~ 400000 KHz)
> exynos-bus: new bus device registered: soc:bus_noc ( 67000 KHz ~ 100000 KHz)
> exynos-bus: new bus device registered: soc:bus_fsys_apb (100000 KHz ~ 200000 KHz)
> ...
> exynos-bus soc:bus_wcore: dev_pm_opp_set_rate: failed to find current OPP for freq 532000000 (-34)
> exynos-bus soc:bus_noc: dev_pm_opp_set_rate: failed to find current OPP for freq 111000000 (-34)
> exynos-bus soc:bus_fsys_apb: dev_pm_opp_set_rate: failed to find current OPP for freq 222000000 (-34)
> 
> The problem with setting incorrect (in some cases much lower) clock rate
> for the defined OPP were there from the beginning, but went unnoticed
> because the only way to observe it was to manually check the rate of the
> respective clocks. The commit 4294a779bd8d ("PM / devfreq: exynos-bus:
> Convert to use dev_pm_opp_set_rate()") finally revealed it, because it
> enabled use of the generic code from the OPP framework, which issues the
> above mentioned warnings.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
> Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
> ---
>  arch/arm/boot/dts/exynos5422-odroid-core.dtsi | 76 +++++++++++--------

Thanks, applied.

Best regards,
Krzysztof
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
index 5fb771680e98..5cf1aed20490 100644
--- a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
+++ b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
@@ -38,82 +38,86 @@ 
 	bus_wcore_opp_table: opp_table2 {
 		compatible = "operating-points-v2";
 
+		/* derived from 532MHz MPLL */
 		opp00 {
-			opp-hz = /bits/ 64 <84000000>;
+			opp-hz = /bits/ 64 <88700000>;
 			opp-microvolt = <925000 925000 1400000>;
 		};
 		opp01 {
-			opp-hz = /bits/ 64 <111000000>;
+			opp-hz = /bits/ 64 <133000000>;
 			opp-microvolt = <950000 950000 1400000>;
 		};
 		opp02 {
-			opp-hz = /bits/ 64 <222000000>;
+			opp-hz = /bits/ 64 <177400000>;
 			opp-microvolt = <950000 950000 1400000>;
 		};
 		opp03 {
-			opp-hz = /bits/ 64 <333000000>;
+			opp-hz = /bits/ 64 <266000000>;
 			opp-microvolt = <950000 950000 1400000>;
 		};
 		opp04 {
-			opp-hz = /bits/ 64 <400000000>;
-			opp-microvolt = <987500 987500 1400000>;
+			opp-hz = /bits/ 64 <532000000>;
+			opp-microvolt = <1000000 1000000 1400000>;
 		};
 	};
 
 	bus_noc_opp_table: opp_table3 {
 		compatible = "operating-points-v2";
 
+		/* derived from 666MHz CPLL */
 		opp00 {
-			opp-hz = /bits/ 64 <67000000>;
+			opp-hz = /bits/ 64 <66600000>;
 		};
 		opp01 {
-			opp-hz = /bits/ 64 <75000000>;
+			opp-hz = /bits/ 64 <74000000>;
 		};
 		opp02 {
-			opp-hz = /bits/ 64 <86000000>;
+			opp-hz = /bits/ 64 <83250000>;
 		};
 		opp03 {
-			opp-hz = /bits/ 64 <100000000>;
+			opp-hz = /bits/ 64 <111000000>;
 		};
 	};
 
 	bus_fsys_apb_opp_table: opp_table4 {
 		compatible = "operating-points-v2";
-		opp-shared;
 
+		/* derived from 666MHz CPLL */
 		opp00 {
-			opp-hz = /bits/ 64 <100000000>;
+			opp-hz = /bits/ 64 <111000000>;
 		};
 		opp01 {
-			opp-hz = /bits/ 64 <200000000>;
+			opp-hz = /bits/ 64 <222000000>;
 		};
 	};
 
 	bus_fsys2_opp_table: opp_table5 {
 		compatible = "operating-points-v2";
 
+		/* derived from 600MHz DPLL */
 		opp00 {
 			opp-hz = /bits/ 64 <75000000>;
 		};
 		opp01 {
-			opp-hz = /bits/ 64 <100000000>;
+			opp-hz = /bits/ 64 <120000000>;
 		};
 		opp02 {
-			opp-hz = /bits/ 64 <150000000>;
+			opp-hz = /bits/ 64 <200000000>;
 		};
 	};
 
 	bus_mfc_opp_table: opp_table6 {
 		compatible = "operating-points-v2";
 
+		/* derived from 666MHz CPLL */
 		opp00 {
-			opp-hz = /bits/ 64 <96000000>;
+			opp-hz = /bits/ 64 <83250000>;
 		};
 		opp01 {
 			opp-hz = /bits/ 64 <111000000>;
 		};
 		opp02 {
-			opp-hz = /bits/ 64 <167000000>;
+			opp-hz = /bits/ 64 <166500000>;
 		};
 		opp03 {
 			opp-hz = /bits/ 64 <222000000>;
@@ -126,8 +130,9 @@ 
 	bus_gen_opp_table: opp_table7 {
 		compatible = "operating-points-v2";
 
+		/* derived from 532MHz MPLL */
 		opp00 {
-			opp-hz = /bits/ 64 <89000000>;
+			opp-hz = /bits/ 64 <88700000>;
 		};
 		opp01 {
 			opp-hz = /bits/ 64 <133000000>;
@@ -136,32 +141,34 @@ 
 			opp-hz = /bits/ 64 <178000000>;
 		};
 		opp03 {
-			opp-hz = /bits/ 64 <267000000>;
+			opp-hz = /bits/ 64 <266000000>;
 		};
 	};
 
 	bus_peri_opp_table: opp_table8 {
 		compatible = "operating-points-v2";
 
+		/* derived from 666MHz CPLL */
 		opp00 {
-			opp-hz = /bits/ 64 <67000000>;
+			opp-hz = /bits/ 64 <66600000>;
 		};
 	};
 
 	bus_g2d_opp_table: opp_table9 {
 		compatible = "operating-points-v2";
 
+		/* derived from 666MHz CPLL */
 		opp00 {
-			opp-hz = /bits/ 64 <84000000>;
+			opp-hz = /bits/ 64 <83250000>;
 		};
 		opp01 {
-			opp-hz = /bits/ 64 <167000000>;
+			opp-hz = /bits/ 64 <111000000>;
 		};
 		opp02 {
-			opp-hz = /bits/ 64 <222000000>;
+			opp-hz = /bits/ 64 <166500000>;
 		};
 		opp03 {
-			opp-hz = /bits/ 64 <300000000>;
+			opp-hz = /bits/ 64 <222000000>;
 		};
 		opp04 {
 			opp-hz = /bits/ 64 <333000000>;
@@ -171,8 +178,9 @@ 
 	bus_g2d_acp_opp_table: opp_table10 {
 		compatible = "operating-points-v2";
 
+		/* derived from 532MHz MPLL */
 		opp00 {
-			opp-hz = /bits/ 64 <67000000>;
+			opp-hz = /bits/ 64 <66500000>;
 		};
 		opp01 {
 			opp-hz = /bits/ 64 <133000000>;
@@ -181,13 +189,14 @@ 
 			opp-hz = /bits/ 64 <178000000>;
 		};
 		opp03 {
-			opp-hz = /bits/ 64 <267000000>;
+			opp-hz = /bits/ 64 <266000000>;
 		};
 	};
 
 	bus_jpeg_opp_table: opp_table11 {
 		compatible = "operating-points-v2";
 
+		/* derived from 600MHz DPLL */
 		opp00 {
 			opp-hz = /bits/ 64 <75000000>;
 		};
@@ -205,23 +214,25 @@ 
 	bus_jpeg_apb_opp_table: opp_table12 {
 		compatible = "operating-points-v2";
 
+		/* derived from 666MHz CPLL */
 		opp00 {
-			opp-hz = /bits/ 64 <84000000>;
+			opp-hz = /bits/ 64 <83250000>;
 		};
 		opp01 {
 			opp-hz = /bits/ 64 <111000000>;
 		};
 		opp02 {
-			opp-hz = /bits/ 64 <134000000>;
+			opp-hz = /bits/ 64 <133000000>;
 		};
 		opp03 {
-			opp-hz = /bits/ 64 <167000000>;
+			opp-hz = /bits/ 64 <166500000>;
 		};
 	};
 
 	bus_disp1_fimd_opp_table: opp_table13 {
 		compatible = "operating-points-v2";
 
+		/* derived from 600MHz DPLL */
 		opp00 {
 			opp-hz = /bits/ 64 <120000000>;
 		};
@@ -233,6 +244,7 @@ 
 	bus_disp1_opp_table: opp_table14 {
 		compatible = "operating-points-v2";
 
+		/* derived from 600MHz DPLL */
 		opp00 {
 			opp-hz = /bits/ 64 <120000000>;
 		};
@@ -247,6 +259,7 @@ 
 	bus_gscl_opp_table: opp_table15 {
 		compatible = "operating-points-v2";
 
+		/* derived from 600MHz DPLL */
 		opp00 {
 			opp-hz = /bits/ 64 <150000000>;
 		};
@@ -261,6 +274,7 @@ 
 	bus_mscl_opp_table: opp_table16 {
 		compatible = "operating-points-v2";
 
+		/* derived from 666MHz CPLL */
 		opp00 {
 			opp-hz = /bits/ 64 <84000000>;
 		};
@@ -274,7 +288,7 @@ 
 			opp-hz = /bits/ 64 <333000000>;
 		};
 		opp04 {
-			opp-hz = /bits/ 64 <400000000>;
+			opp-hz = /bits/ 64 <666000000>;
 		};
 	};
 
@@ -398,7 +412,7 @@ 
 };
 
 &bus_fsys {
-	operating-points-v2 = <&bus_fsys_apb_opp_table>;
+	operating-points-v2 = <&bus_fsys2_opp_table>;
 	devfreq = <&bus_wcore>;
 	status = "okay";
 };