From: Chanwoo Choi <cw00.choi@samsung.com>
To: myungjoo.ham@samsung.com, k.kozlowski@samsung.com, kgene@kernel.org
Cc: kyungmin.park@samsung.com, robh+dt@kernel.org,
pawel.moll@arm.com, mark.rutland@arm.com,
ijc+devicetree@hellion.org.uk, galak@codeaurora.org,
linux@arm.linux.org.uk, tjakobi@math.uni-bielefeld.de,
linux.amoon@gmail.com, cw00.choi@samsung.com,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org
Subject: [PATCH v2 09/19] PM / devfreq: exynos: Update documentation for bus devices using passive governor
Date: Wed, 09 Dec 2015 13:08:01 +0900 [thread overview]
Message-ID: <1449634091-1842-10-git-send-email-cw00.choi@samsung.com> (raw)
In-Reply-To: <1449634091-1842-1-git-send-email-cw00.choi@samsung.com>
This patch updates the documentation for passive bus devices and adds the
detailed example of Exynos3250.
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
.../devicetree/bindings/devfreq/exynos-bus.txt | 244 ++++++++++++++++++++-
1 file changed, 241 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/devfreq/exynos-bus.txt b/Documentation/devicetree/bindings/devfreq/exynos-bus.txt
index 54a1f9c46c88..c4fdc70f8eac 100644
--- a/Documentation/devicetree/bindings/devfreq/exynos-bus.txt
+++ b/Documentation/devicetree/bindings/devfreq/exynos-bus.txt
@@ -13,18 +13,23 @@ SoC has the different sub-blocks. So, this difference should be specified
in devicetree file instead of each device driver. In result, this driver
is able to support the bus frequency for all Exynos SoCs.
-Required properties for bus device:
+Required properties for all bus devices:
- compatible: Should be "samsung,exynos-bus".
- clock-names : the name of clock used by the bus, "bus".
- clocks : phandles for clock specified in "clock-names" property.
- #clock-cells: should be 1.
- operating-points-v2: the OPP table including frequency/voltage information
to support DVFS (Dynamic Voltage/Frequency Scaling) feature.
+
+Required properties for only parent bus device:
- vdd-supply: the regulator to provide the buses with the voltage.
- devfreq-events: the devfreq-event device to monitor the curret utilization
of buses.
-Optional properties for bus device:
+Required properties for only passive bus device:
+- devfreq: the parent bus device.
+
+Optional properties for only parent bus device:
- exynos,saturation-ratio: the percentage value which is used to calibrate
the performance count againt total cycle count.
@@ -33,7 +38,20 @@ Example1:
power line (regulator). The MIF (Memory Interface) AXI bus is used to
transfer data between DRAM and CPU and uses the VDD_MIF regualtor.
- - power line(VDD_MIF) --> bus for DMC (Dynamic Memory Controller) block
+ - MIF (Memory Interface) block
+ : VDD_MIF |--- DMC (Dynamic Memory Controller)
+
+ - INT (Internal) block
+ : VDD_INT |--- LEFTBUS (parent device)
+ |--- PERIL
+ |--- MFC
+ |--- G3D
+ |--- RIGHTBUS
+ |--- FSYS
+ |--- LCD0
+ |--- PERIR
+ |--- ISP
+ |--- CAM
- MIF bus's frequency/voltage table
-----------------------
@@ -46,6 +64,24 @@ Example1:
|L5| 400000 |875000 |
-----------------------
+ - INT bus's frequency/voltage table
+ ----------------------------------------------------------
+ |Block|LEFTBUS|RIGHTBUS|MCUISP |ISP |PERIL ||VDD_INT |
+ | name| |LCD0 | | | || |
+ | | |FSYS | | | || |
+ | | |MFC | | | || |
+ ----------------------------------------------------------
+ |Mode |*parent|passive |passive|passive|passive|| |
+ ----------------------------------------------------------
+ |Lv |Frequency ||Voltage |
+ ----------------------------------------------------------
+ |L1 |50000 |50000 |50000 |50000 |50000 ||900000 |
+ |L2 |80000 |80000 |80000 |80000 |80000 ||900000 |
+ |L3 |100000 |100000 |100000 |100000 |100000 ||1000000 |
+ |L4 |134000 |134000 |200000 |200000 | ||1000000 |
+ |L5 |200000 |200000 |400000 |300000 | ||1000000 |
+ ----------------------------------------------------------
+
Example2 :
The bus of DMC (Dynamic Memory Controller) block in exynos3250.dtsi
are listed below:
@@ -84,6 +120,167 @@ Example2 :
};
};
+ bus_leftbus: bus_leftbus {
+ compatible = "samsung,exynos-bus";
+ clocks = <&cmu CLK_DIV_GDL>;
+ clock-names = "bus";
+ operating-points-v2 = <&bus_leftbus_opp_table>;
+ status = "disabled";
+ };
+
+ bus_rightbus: bus_rightbus {
+ compatible = "samsung,exynos-bus";
+ clocks = <&cmu CLK_DIV_GDR>;
+ clock-names = "bus";
+ operating-points-v2 = <&bus_leftbus_opp_table>;
+ status = "disabled";
+ };
+
+ bus_lcd0: bus_lcd0 {
+ compatible = "samsung,exynos-bus";
+ clocks = <&cmu CLK_DIV_ACLK_160>;
+ clock-names = "bus";
+ operating-points-v2 = <&bus_leftbus_opp_table>;
+ status = "disabled";
+ };
+
+ bus_fsys: bus_fsys {
+ compatible = "samsung,exynos-bus";
+ clocks = <&cmu CLK_DIV_ACLK_200>;
+ clock-names = "bus";
+ operating-points-v2 = <&bus_leftbus_opp_table>;
+ status = "disabled";
+ };
+
+ bus_mcuisp: bus_mcuisp {
+ compatible = "samsung,exynos-bus";
+ clocks = <&cmu CLK_DIV_ACLK_400_MCUISP>;
+ clock-names = "bus";
+ operating-points-v2 = <&bus_mcuisp_opp_table>;
+ status = "disabled";
+ };
+
+ bus_isp: bus_isp {
+ compatible = "samsung,exynos-bus";
+ clocks = <&cmu CLK_DIV_ACLK_266>;
+ clock-names = "bus";
+ operating-points-v2 = <&bus_isp_opp_table>;
+ status = "disabled";
+ };
+
+ bus_peril: bus_perir {
+ compatible = "samsung,exynos-bus";
+ clocks = <&cmu CLK_DIV_ACLK_100>;
+ clock-names = "bus";
+ operating-points-v2 = <&bus_peril_opp_table>;
+ status = "disabled";
+ };
+
+ bus_mfc: bus_mfc {
+ compatible = "samsung,exynos-bus";
+ clocks = <&cmu CLK_SCLK_MFC>;
+ clock-names = "bus";
+ operating-points-v2 = <&bus_leftbus_opp_table>;
+ status = "disabled";
+ };
+
+ bus_leftbus_opp_table: opp_table1 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp00 {
+ opp-hz = /bits/ 64 <50000000>;
+ opp-microvolt = <900000>;
+ };
+ opp01 {
+ opp-hz = /bits/ 64 <80000000>;
+ opp-microvolt = <900000>;
+ };
+ opp02 {
+ opp-hz = /bits/ 64 <100000000>;
+ opp-microvolt = <1000000>;
+ };
+ opp03 {
+ opp-hz = /bits/ 64 <134000000>;
+ opp-microvolt = <1000000>;
+ };
+ opp04 {
+ opp-hz = /bits/ 64 <200000000>;
+ opp-microvolt = <1000000>;
+ };
+ };
+
+ bus_mcuisp_opp_table: opp_table2 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp00 {
+ opp-hz = /bits/ 64 <50000000>;
+ opp-microvolt = <900000>;
+ };
+ opp01 {
+ opp-hz = /bits/ 64 <80000000>;
+ opp-microvolt = <900000>;
+ };
+ opp02 {
+ opp-hz = /bits/ 64 <100000000>;
+ opp-microvolt = <1000000>;
+ };
+ opp03 {
+ opp-hz = /bits/ 64 <200000000>;
+ opp-microvolt = <1000000>;
+ };
+ opp04 {
+ opp-hz = /bits/ 64 <400000000>;
+ opp-microvolt = <1000000>;
+ };
+ };
+
+ bus_isp_opp_table: opp_table3 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp00 {
+ opp-hz = /bits/ 64 <50000000>;
+ opp-microvolt = <900000>;
+ };
+ opp01 {
+ opp-hz = /bits/ 64 <80000000>;
+ opp-microvolt = <900000>;
+ };
+ opp02 {
+ opp-hz = /bits/ 64 <100000000>;
+ opp-microvolt = <1000000>;
+ };
+ opp03 {
+ opp-hz = /bits/ 64 <200000000>;
+ opp-microvolt = <1000000>;
+ };
+ opp04 {
+ opp-hz = /bits/ 64 <300000000>;
+ opp-microvolt = <1000000>;
+ };
+ };
+
+ bus_peril_opp_table: opp_table4 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp00 {
+ opp-hz = /bits/ 64 <50000000>;
+ opp-microvolt = <900000>;
+ };
+ opp01 {
+ opp-hz = /bits/ 64 <80000000>;
+ opp-microvolt = <900000>;
+ };
+ opp02 {
+ opp-hz = /bits/ 64 <100000000>;
+ opp-microvolt = <1000000>;
+ };
+ };
+
+
Usage case to handle the frequency and voltage of bus on runtime
in exynos3250-rinato.dts are listed below:
@@ -92,3 +289,44 @@ Example2 :
vdd-supply = <&buck1_reg>; /* VDD_MIF */
status = "okay";
};
+
+ &bus_leftbus {
+ devfreq-events = <&ppmu_leftbus_3>, <&ppmu_rightbus_3>;
+ vdd-supply = <&buck3_reg>;
+ status = "okay";
+ };
+
+ &bus_rightbus {
+ devfreq = <&bus_leftbus>;
+ status = "okay";
+ };
+
+ &bus_lcd0 {
+ devfreq = <&bus_leftbus>;
+ status = "okay";
+ };
+
+ &bus_fsys {
+ devfreq = <&bus_leftbus>;
+ status = "okay";
+ };
+
+ &bus_mcuisp {
+ devfreq = <&bus_leftbus>;
+ status = "okay";
+ };
+
+ &bus_isp {
+ devfreq = <&bus_leftbus>;
+ status = "okay";
+ };
+
+ &bus_peril {
+ devfreq = <&bus_leftbus>;
+ status = "okay";
+ };
+
+ &bus_mfc {
+ devfreq = <&bus_leftbus>;
+ status = "okay";
+ };
--
1.9.1
next prev parent reply other threads:[~2015-12-09 4:09 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-09 4:07 [PATCH v2 00/19] PM / devferq: Add generic exynos bus frequency driver and new passive governor Chanwoo Choi
2015-12-09 4:07 ` [PATCH v2 01/19] PM / devfreq: exynos: Add generic exynos bus frequency driver Chanwoo Choi
2015-12-09 4:07 ` [PATCH v2 02/19] PM / devfreq: exynos: Add documentation for " Chanwoo Choi
2015-12-10 0:39 ` Krzysztof Kozlowski
2015-12-10 0:49 ` Chanwoo Choi
2015-12-10 0:49 ` Chanwoo Choi
2015-12-10 1:25 ` Krzysztof Kozlowski
2015-12-10 1:33 ` Chanwoo Choi
2015-12-09 4:07 ` [PATCH v2 03/19] ARM: dts: Add DMC bus node for Exynos3250 Chanwoo Choi
2015-12-10 0:44 ` Krzysztof Kozlowski
2015-12-10 1:09 ` Chanwoo Choi
2015-12-10 1:20 ` Krzysztof Kozlowski
2015-12-10 2:00 ` Chanwoo Choi
2015-12-10 2:04 ` Krzysztof Kozlowski
2015-12-10 2:17 ` Chanwoo Choi
2015-12-10 2:21 ` Krzysztof Kozlowski
2015-12-09 4:07 ` [PATCH v2 04/19] ARM: dts: Add DMC bus frequency for exynos3250-rinato/monk Chanwoo Choi
2015-12-10 0:53 ` Krzysztof Kozlowski
2015-12-10 0:56 ` Chanwoo Choi
2015-12-09 4:07 ` [PATCH v2 05/19] PM / devfreq: Add new passive governor Chanwoo Choi
2015-12-09 4:07 ` [PATCH v2 06/19] PM / devfreq: Add devfreq_get_devfreq_by_phandle() Chanwoo Choi
2015-12-09 4:07 ` [PATCH v2 07/19] PM / devfreq: Show the related information according to governor type Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 08/19] PM / devfreq: exynos: Add support of bus frequency of sub-blocks using passive governor Chanwoo Choi
2015-12-09 4:08 ` Chanwoo Choi
2015-12-09 4:08 ` Chanwoo Choi [this message]
2015-12-10 1:31 ` [PATCH v2 09/19] PM / devfreq: exynos: Update documentation for bus devices " Krzysztof Kozlowski
2015-12-10 1:36 ` Chanwoo Choi
2015-12-10 14:21 ` Rob Herring
2015-12-10 15:10 ` Chanwoo Choi
2015-12-11 3:24 ` Rob Herring
2015-12-11 3:56 ` Chanwoo Choi
2015-12-11 3:56 ` Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 10/19] PM / devfreq: exynos: Add the detailed correlation between sub-blocks and power line Chanwoo Choi
2015-12-09 4:08 ` Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 11/19] PM / devfreq: exynos: Remove unused exynos4/5 busfreq driver Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 12/19] ARM: dts: Add bus nodes using VDD_INT for Exynos3250 Chanwoo Choi
2015-12-10 2:09 ` Krzysztof Kozlowski
2015-12-10 2:30 ` Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 13/19] ARM: dts: Add bus nodes using VDD_MIF for Exynos4x12 Chanwoo Choi
2015-12-10 3:17 ` Krzysztof Kozlowski
2015-12-10 4:21 ` Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 14/19] ARM: dts: Add bus nodes using VDD_INT " Chanwoo Choi
2015-12-10 5:57 ` Krzysztof Kozlowski
2015-12-10 6:08 ` Chanwoo Choi
2015-12-10 6:32 ` Krzysztof Kozlowski
2015-12-10 6:43 ` Chanwoo Choi
2015-12-10 6:53 ` Krzysztof Kozlowski
2015-12-10 7:07 ` Chanwoo Choi
2015-12-10 7:12 ` Krzysztof Kozlowski
2015-12-10 7:18 ` Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 15/19] ARM: dts: Add bus nodes using VDD_MIF for Exynos4210 Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 16/19] ARM: dts: Add PPMU node for exynos4412-odroidu3 Chanwoo Choi
2015-12-10 6:44 ` Krzysztof Kozlowski
2015-12-11 2:27 ` Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 17/19] ARM: dts: Add support of bus frequency using VDD_INT for exynos3250-rinato Chanwoo Choi
2015-12-10 6:58 ` Krzysztof Kozlowski
2015-12-10 7:24 ` Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 18/19] ARM: dts: Expand the voltage range of buck1/3 regulator for exynos4412-odroidu3 Chanwoo Choi
2015-12-10 7:02 ` Krzysztof Kozlowski
2015-12-10 7:02 ` Krzysztof Kozlowski
2015-12-10 7:19 ` Chanwoo Choi
2015-12-09 4:08 ` [PATCH v2 19/19] ARM: dts: Add support of bus frequency for exynos4412-trats/odroidu3 Chanwoo Choi
2015-12-10 7:08 ` Krzysztof Kozlowski
2015-12-10 7:23 ` Chanwoo Choi
2015-12-09 19:05 ` [PATCH v2 00/19] PM / devferq: Add generic exynos bus frequency driver and new passive governor Anand Moon
2015-12-10 0:12 ` Chanwoo Choi
2015-12-10 4:14 ` Anand Moon
2015-12-10 4:14 ` Anand Moon
2015-12-10 4:20 ` Chanwoo Choi
2015-12-10 0:57 ` Krzysztof Kozlowski
2015-12-10 1:22 ` Krzysztof Kozlowski
2015-12-10 2:16 ` Chanwoo Choi
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