[PATCH v3 2/8] ARM: dts: omap34xx & omap36xx: replace opp-v1 tables by opp-v2 for

From: "H. Nikolaus Schaller" <hns@goldelico.com>
To: "Benoît Cousson" <bcousson@baylibre.com>,
	"Tony Lindgren" <tony@atomide.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Adam Ford" <aford173@gmail.com>,
	"André Roth" <neolynx@gmail.com>,
	"Mark Rutland" <mark.rutland@arm.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	"Viresh Kumar" <viresh.kumar@linaro.org>,
	"Enric Balletbo i Serra" <eballetbo@gmail.com>,
	"Javier Martinez Canillas" <javier@dowhile0.org>,
	"Roger Quadros" <rogerq@ti.com>,
	"Teresa Remmet" <t.remmet@phytec.de>,
	"H. Nikolaus Schaller" <hns@goldelico.com>
Cc: linux-omap@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	letux-kernel@openphoenux.org, kernel@pyra-handheld.com,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 2/8] ARM: dts: omap34xx & omap36xx: replace opp-v1 tables by opp-v2 for
Date: Wed, 11 Sep 2019 19:47:08 +0200	[thread overview]
Message-ID: <5b3cebcc745d20bcbf06e548f8e5665e083b5474.1568224033.git.hns@goldelico.com> (raw)
In-Reply-To: <cover.1568224032.git.hns@goldelico.com>

With the driver installed, we can change the opp-v1 table format
to opp-v2.

In addition, move omap3 from whitelist to blacklist in cpufreq-dt-platdev
in the same patch, because doing either first breaks operation and
may make trouble in bisect.

We also can remove opp-v1 table for omap3-n950-n9 since its 1GHz
capability is now automatically detected.

We also fix a wrong OPP4 voltage for omap3430 which must be
0.6V + 54*12.5mV = 1275mV. Otherwise the twl4030 driver will reject
this OPP.

Note: the high speed OPPs that were not available in the opp-v1 tables
are tagged "turbo-mode;" which means they are not automatically
activated by the govenors or cpu-freq.

To enable you have to write

echo 1 >/sys/devices/system/cpu/cpufreq/boost

Note: to hard disable an OPP in a board.dts file use e.g.

&cpu0_opp_table: {
	/delete-node/ opp1g-1000000000;	/* do not use */
};

or alternatively:

&cpu0_opp_table: {
	opp1g-1000000000 {
		status = "disabled";	/* do not use */
	};
};

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Acked-by: Tony Lindgren <tony@atomide.com>
---
 arch/arm/boot/dts/omap3-n950-n9.dtsi |  7 ---
 arch/arm/boot/dts/omap34xx.dtsi      | 66 ++++++++++++++++++++++++----
 arch/arm/boot/dts/omap36xx.dtsi      | 54 +++++++++++++++++++----
 drivers/cpufreq/cpufreq-dt-platdev.c |  2 +-
 4 files changed, 104 insertions(+), 25 deletions(-)

diff --git a/arch/arm/boot/dts/omap3-n950-n9.dtsi b/arch/arm/boot/dts/omap3-n950-n9.dtsi
index 5441e9ffdbb4..e98b0c615f19 100644
--- a/arch/arm/boot/dts/omap3-n950-n9.dtsi
+++ b/arch/arm/boot/dts/omap3-n950-n9.dtsi
@@ -11,13 +11,6 @@
 	cpus {
 		cpu@0 {
 			cpu0-supply = <&vcc>;
-			operating-points = <
-				/* kHz    uV */
-				300000  1012500
-				600000  1200000
-				800000  1325000
-				1000000	1375000
-			>;
 		};
 	};
 
diff --git a/arch/arm/boot/dts/omap34xx.dtsi b/arch/arm/boot/dts/omap34xx.dtsi
index f572a477f74c..1d2737c0ba27 100644
--- a/arch/arm/boot/dts/omap34xx.dtsi
+++ b/arch/arm/boot/dts/omap34xx.dtsi
@@ -16,19 +16,67 @@
 / {
 	cpus {
 		cpu: cpu@0 {
-			/* OMAP343x/OMAP35xx variants OPP1-5 */
-			operating-points = <
-				/* kHz    uV */
-				125000   975000
-				250000  1075000
-				500000  1200000
-				550000  1270000
-				600000  1350000
-			>;
+			/* OMAP343x/OMAP35xx variants OPP1-6 */
+			operating-points-v2 = <&cpu0_opp_table>;
+
 			clock-latency = <300000>; /* From legacy driver */
 		};
 	};
 
+	/* see Documentation/devicetree/bindings/opp/opp.txt */
+	cpu0_opp_table: opp-table {
+		compatible = "operating-points-v2-ti-cpu";
+		syscon = <&scm_conf>;
+
+		opp1-125000000 {
+			opp-hz = /bits/ 64 <125000000>;
+			/*
+			 * we currently only select the max voltage from table
+			 * Table 3-3 of the omap3530 Data sheet (SPRS507F).
+			 * Format is: <target min max>
+			 */
+			opp-microvolt = <975000 975000 975000>;
+			/*
+			 * first value is silicon revision bit mask
+			 * second one 720MHz Device Identification bit mask
+			 */
+			opp-supported-hw = <0xffffffff 3>;
+		};
+
+		opp2-250000000 {
+			opp-hz = /bits/ 64 <250000000>;
+			opp-microvolt = <1075000 1075000 1075000>;
+			opp-supported-hw = <0xffffffff 3>;
+			opp-suspend;
+		};
+
+		opp3-500000000 {
+			opp-hz = /bits/ 64 <500000000>;
+			opp-microvolt = <1200000 1200000 1200000>;
+			opp-supported-hw = <0xffffffff 3>;
+		};
+
+		opp4-550000000 {
+			opp-hz = /bits/ 64 <550000000>;
+			opp-microvolt = <1275000 1275000 1275000>;
+			opp-supported-hw = <0xffffffff 3>;
+		};
+
+		opp5-600000000 {
+			opp-hz = /bits/ 64 <600000000>;
+			opp-microvolt = <1350000 1350000 1350000>;
+			opp-supported-hw = <0xffffffff 3>;
+		};
+
+		opp6-720000000 {
+			opp-hz = /bits/ 64 <720000000>;
+			opp-microvolt = <1350000 1350000 1350000>;
+			/* only high-speed grade omap3530 devices */
+			opp-supported-hw = <0xffffffff 2>;
+			turbo-mode;
+		};
+	};
+
 	ocp@68000000 {
 		omap3_pmx_core2: pinmux@480025d8 {
 			compatible = "ti,omap3-padconf", "pinctrl-single";
diff --git a/arch/arm/boot/dts/omap36xx.dtsi b/arch/arm/boot/dts/omap36xx.dtsi
index 6fb23ada1f64..cb5bd0969124 100644
--- a/arch/arm/boot/dts/omap36xx.dtsi
+++ b/arch/arm/boot/dts/omap36xx.dtsi
@@ -19,15 +19,53 @@
 	};
 
 	cpus {
-		/* OMAP3630/OMAP37xx 'standard device' variants OPP50 to OPP130 */
+		/* OMAP3630/OMAP37xx variants OPP50 to OPP130 and OPP1G */
 		cpu: cpu@0 {
-			operating-points = <
-				/* kHz    uV */
-				300000  1012500
-				600000  1200000
-				800000  1325000
-			>;
-			clock-latency = <300000>; /* From legacy driver */
+			operating-points-v2 = <&cpu0_opp_table>;
+
+			clock-latency = <300000>; /* From omap-cpufreq driver */
+		};
+	};
+
+	/* see Documentation/devicetree/bindings/opp/opp.txt */
+	cpu0_opp_table: opp-table {
+		compatible = "operating-points-v2-ti-cpu";
+		syscon = <&scm_conf>;
+
+		opp50-300000000 {
+			opp-hz = /bits/ 64 <300000000>;
+			/*
+			 * we currently only select the max voltage from table
+			 * Table 4-19 of the DM3730 Data sheet (SPRS685B)
+			 * Format is: <target min max>
+			 */
+			opp-microvolt = <1012500 1012500 1012500>;
+			/*
+			 * first value is silicon revision bit mask
+			 * second one is "speed binned" bit mask
+			 */
+			opp-supported-hw = <0xffffffff 3>;
+			opp-suspend;
+		};
+
+		opp100-600000000 {
+			opp-hz = /bits/ 64 <600000000>;
+			opp-microvolt = <1200000 1200000 1200000>;
+			opp-supported-hw = <0xffffffff 3>;
+		};
+
+		opp130-800000000 {
+			opp-hz = /bits/ 64 <800000000>;
+			opp-microvolt = <1325000 1325000 1325000>;
+			opp-supported-hw = <0xffffffff 3>;
+		};
+
+		opp1g-1000000000 {
+			opp-hz = /bits/ 64 <1000000000>;
+			opp-microvolt = <1375000 1375000 1375000>;
+			/* only on am/dm37x with speed-binned bit set */
+			opp-supported-hw = <0xffffffff 2>;
+			turbo-mode;
 		};
 	};
 
diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index 03dc4244ab00..68b7fc4225f8 100644
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -86,7 +86,6 @@ static const struct of_device_id whitelist[] __initconst = {
 	{ .compatible = "st-ericsson,u9540", },
 
 	{ .compatible = "ti,omap2", },
-	{ .compatible = "ti,omap3", },
 	{ .compatible = "ti,omap4", },
 	{ .compatible = "ti,omap5", },
 
@@ -132,6 +131,7 @@ static const struct of_device_id blacklist[] __initconst = {
 	{ .compatible = "ti,am33xx", },
 	{ .compatible = "ti,am43", },
 	{ .compatible = "ti,dra7", },
+	{ .compatible = "ti,omap3", },
 
 	{ }
 };
-- 
2.19.1

