From: Lukasz Luba <l.luba@partner.samsung.com>
To: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>,
Rob Herring <robh+dt@kernel.org>,
b.zolnierkie@samsung.com, krzk@kernel.org,
Lukasz Luba <l.luba@partner.samsung.com>,
cw00.choi@samsung.com, kyungmin.park@samsung.com,
kgene@kernel.org, myungjoo.ham@samsung.com,
s.nawrocki@samsung.com, linux-arm-kernel@lists.infradead.org,
m.szyprowski@samsung.com
Subject: [PATCH v3 5/8] dt-bindings: devfreq: add Exynos5422 DMC device description
Date: Thu, 31 Jan 2019 09:49:51 +0100 [thread overview]
Message-ID: <1548924594-19084-6-git-send-email-l.luba@partner.samsung.com> (raw)
In-Reply-To: <1548924594-19084-1-git-send-email-l.luba@partner.samsung.com>
The patch adds description for DT binding for a new Exynos5422 Dynamic
Memory Controller device.
It also contains needed MAINTAINERS file update.
CC: MyungJoo Ham <myungjoo.ham@samsung.com>
CC: Kyungmin Park <kyungmin.park@samsung.com>
CC: Chanwoo Choi <cw00.choi@samsung.com>
CC: Rob Herring <robh+dt@kernel.org>
CC: Mark Rutland <mark.rutland@arm.com>
CC: Kukjin Kim <kgene@kernel.org>
CC: Krzysztof Kozlowski <krzk@kernel.org>
CC: linux-pm@vger.kernel.org
CC: linux-samsung-soc@vger.kernel.org
CC: devicetree@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>
---
.../devicetree/bindings/devfreq/exynos5422-dmc.txt | 106 +++++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 107 insertions(+)
create mode 100644 Documentation/devicetree/bindings/devfreq/exynos5422-dmc.txt
diff --git a/Documentation/devicetree/bindings/devfreq/exynos5422-dmc.txt b/Documentation/devicetree/bindings/devfreq/exynos5422-dmc.txt
new file mode 100644
index 0000000..229efba
--- /dev/null
+++ b/Documentation/devicetree/bindings/devfreq/exynos5422-dmc.txt
@@ -0,0 +1,106 @@
+* Exynos5422 frequency and voltage scaling for Dynamic Memory Controller device
+
+The Samsung Exynos5422 SoC has DMC (Dynamic Memory Controller) to which the DRAM
+memory chips are connected. The driver is to monitor the controller in runtime
+and switch frequency and voltage. To monitor the usage of the controller in
+runtime, the driver uses the PPMU (Platform Performance Monitoring Unit), which
+is able to measure the current load of the memory.
+When 'userspace' governor is used for the driver, an application is able to
+switch the DMC frequency.
+
+Required properties for DMC device for Exynos5422:
+- compatible: Should be "samsung,exynos5422-bus".
+- clock-names : the name of clock used by the bus, "bus".
+- clocks : phandles for clock specified in "clock-names" property.
+- devfreq-events : phandles for PPMU devices connected to this DMC.
+
+The example definition of a DMC and PPMU devices declared in DT is shown below:
+
+ ppmu_dmc0_0: ppmu@10d00000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x10d00000 0x2000>;
+ clocks = <&clock CLK_PCLK_PPMU_DREX0_0>;
+ clock-names = "ppmu";
+ status = "okay";
+ events {
+ ppmu_event_dmc0_0: ppmu-event3-dmc0_0 {
+ event-name = "ppmu-event3-dmc0_0";
+ };
+ };
+ };
+
+
+ ppmu_dmc0_1: ppmu@10d10000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x10d10000 0x2000>;
+ clocks = <&clock CLK_PCLK_PPMU_DREX0_1>;
+ clock-names = "ppmu";
+ status = "okay";
+ events {
+ ppmu_event_dmc0_1: ppmu-event3-dmc0_1 {
+ event-name = "ppmu-event3-dmc0_1";
+ };
+ };
+ };
+
+ ppmu_dmc1_0: ppmu@10d10000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x10d60000 0x2000>;
+ clocks = <&clock CLK_PCLK_PPMU_DREX1_0>;
+ clock-names = "ppmu";
+ status = "okay";
+ events {
+ ppmu_event_dmc1_0: ppmu-event3-dmc1_0 {
+ event-name = "ppmu-event3-dmc1_0";
+ };
+ };
+ };
+
+ ppmu_dmc1_1: ppmu@10d70000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x10d70000 0x2000>;
+ clocks = <&clock CLK_PCLK_PPMU_DREX1_1>;
+ clock-names = "ppmu";
+ status = "okay";
+ events {
+ ppmu_event_dmc1_1: ppmu-event3-dmc1_1 {
+ event-name = "ppmu-event3-dmc1_1";
+ };
+ };
+ };
+
+ dmc: memory-controller@10c20000 {
+ compatible = "samsung,exynos5422-dmc";
+ reg = <0x10c20000 0x10000>, <0x10c30000 0x10000>,
+ <0x10030000 0x1000>, <0x10000000 0x1000>;
+ clocks = <&clock CLK_FOUT_SPLL>,
+ <&clock CLK_MOUT_SCLK_SPLL>,
+ <&clock CLK_FF_DOUT_SPLL2>,
+ <&clock CLK_FOUT_BPLL>,
+ <&clock CLK_MOUT_BPLL>,
+ <&clock CLK_SCLK_BPLL>,
+ <&clock CLK_MOUT_MX_MSPLL_CCORE>,
+ <&clock CLK_MOUT_MX_MSPLL_CCORE_PHY>,
+ <&clock CLK_MOUT_MCLK_CDREX>,
+ <&clock CLK_DOUT_CLK2X_PHY0>,
+ <&clock CLK_CLKM_PHY0>,
+ <&clock CLK_CLKM_PHY1>;
+ clock-names = "fout_spll",
+ "mout_sclk_spll",
+ "ff_dout_spll2",
+ "fout_bpll",
+ "mout_bpll",
+ "sclk_bpll",
+ "mout_mx_mspll_ccore",
+ "mout_mx_mspll_ccore_phy",
+ "mout_mclk_cdrex",
+ "dout_clk2x_phy0",
+ "clkm_phy0",
+ "clkm_phy1";
+
+ status = "okay";
+ devfreq-events = <&ppmu_dmc0_0>, <&ppmu_dmc0_1>,
+ <&ppmu_dmc1_0>, <&ppmu_dmc1_1>;
+ };
+
+
diff --git a/MAINTAINERS b/MAINTAINERS
index e81dfbf..ab0d8a5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3316,6 +3316,7 @@ L: linux-pm@vger.kernel.org
L: linux-samsung-soc@vger.kernel.org
S: Maintained
F: drivers/devfreq/exynos5422-dmc.c
+F: Documentation/devicetree/bindings/devfreq/exynos5422-dmc.txt
BUSLOGIC SCSI DRIVER
M: Khalid Aziz <khalid@gonehiking.org>
--
2.7.4
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-01-31 8:55 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1548924594-19084-1-git-send-email-l.luba@partner.samsung.com>
[not found] ` <CGME20190131085006eucas1p2e4ba3f69e039c394e7cd42389ac8bfa7@eucas1p2.samsung.com>
2019-01-31 8:49 ` [PATCH v3 1/8] clk: samsung: add needed IDs for DMC clocks in Exynos5420 Lukasz Luba
2019-02-01 7:40 ` Chanwoo Choi
2019-02-01 13:49 ` Lukasz Luba
[not found] ` <CGME20190131085006eucas1p1ca478545c107086d427909c88d3b232e@eucas1p1.samsung.com>
2019-01-31 8:49 ` [PATCH v3 2/8] clk: samsung: add new clocks for DMC for Exynos5422 SoC Lukasz Luba
2019-02-01 8:07 ` Chanwoo Choi
2019-02-01 9:20 ` Chanwoo Choi
2019-02-01 13:03 ` Lukasz Luba
[not found] ` <CGME20190131085007eucas1p2f16107042b8ce5638811840618bcf017@eucas1p2.samsung.com>
2019-01-31 8:49 ` [PATCH v3 3/8] clk: samsung: add BPLL rate table for Exynos 5422 SoC Lukasz Luba
2019-02-01 8:44 ` Chanwoo Choi
2019-02-01 13:56 ` Lukasz Luba
2019-02-01 14:19 ` Sylwester Nawrocki
2019-02-01 15:39 ` Lukasz Luba
2019-02-03 7:54 ` Chanwoo Choi
2019-02-11 10:21 ` Lukasz Luba
2019-02-11 10:34 ` Chanwoo Choi
[not found] ` <CGME20190131085008eucas1p237fe9e2f8cb6254e8da7c97c2984e6b2@eucas1p2.samsung.com>
2019-01-31 8:49 ` [PATCH v3 4/8] drivers: devfreq: add DMC driver for Exynos5422 Lukasz Luba
[not found] ` <CGME20190131085009eucas1p14c96bc345bc4c414e6c4d7506f14e69c@eucas1p1.samsung.com>
2019-01-31 8:49 ` Lukasz Luba [this message]
[not found] ` <CGME20190131085009eucas1p166467551006e54130905ebb5eefdefab@eucas1p1.samsung.com>
2019-01-31 8:49 ` [PATCH v3 6/8] DT: arm: exynos: add DMC device for exynos5422 Lukasz Luba
[not found] ` <CGME20190131085010eucas1p2b2bdc90be27dfd73f13d41ed0d725bb2@eucas1p2.samsung.com>
2019-01-31 8:49 ` [PATCH v3 7/8] drivers: devfreq: events: add Exynos PPMU new events Lukasz Luba
[not found] ` <CGME20190131085011eucas1p2c315d69c8902fbceff689f3a92e0c5d9@eucas1p2.samsung.com>
2019-01-31 8:49 ` [PATCH v3 8/8] ARM: exynos_defconfig: enable DMC driver Lukasz Luba
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1548924594-19084-6-git-send-email-l.luba@partner.samsung.com \
--to=l.luba@partner.samsung.com \
--cc=b.zolnierkie@samsung.com \
--cc=cw00.choi@samsung.com \
--cc=devicetree@vger.kernel.org \
--cc=kgene@kernel.org \
--cc=krzk@kernel.org \
--cc=kyungmin.park@samsung.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=m.szyprowski@samsung.com \
--cc=mark.rutland@arm.com \
--cc=myungjoo.ham@samsung.com \
--cc=robh+dt@kernel.org \
--cc=s.nawrocki@samsung.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).