From: Javier Martinez Canillas <javier@osg.samsung.com>
To: Chanwoo Choi <cw00.choi@samsung.com>,
k.kozlowski@samsung.com, kgene@kernel.org, robh+dt@kernel.org,
mark.rutland@arm.com, catalin.marinas@arm.com,
will.deacon@arm.com, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: krzk@kernel.org, jh80.chung@samsung.com, sw0312.kim@samsung.com,
jy0922.shim@samsung.com, inki.dae@samsung.com,
jonghwa3.lee@samsung.com, beomho.seo@samsung.com,
jaewon02.kim@samsung.com, human.hwang@samsung.com,
ideal.song@samsung.com, ingi2.kim@samsung.com,
m.szyprowski@samsung.com, a.hajda@samsung.com,
s.nawrocki@samsung.com, chanwoo@kernel.org
Subject: Re: [PATCH v2 6/7] arm64: dts: exynos: Add dts file for Exynos5433-based TM2 board
Date: Fri, 26 Aug 2016 14:30:23 -0400 [thread overview]
Message-ID: <0a6dffe0-8508-724e-c831-d14c32f8cd64@osg.samsung.com> (raw)
In-Reply-To: <1472046551-703-7-git-send-email-cw00.choi@samsung.com>
Hello Chanwoo,
The patch looks mostly good to me, I've just some comments:
[snip]
> +
> +&decon {
> + status = "okay";
> + iommu-reserved-mapping = <0x20000000 0x20000000 0xc0000000>;
> +
This property never made to mainline due not having an agreement on
how this should be fixed properly IIUC [0]. So you should remove it.
[snip]
> +
> + s2mps13-pmic@66 {
> + compatible = "samsung,s2mps13-pmic";
> + interrupt-parent = <&gpa0>;
> + interrupts = <7 IRQ_TYPE_NONE>;
> + reg = <0x66>;
> + samsung,s2mps11-wrstbi-ground;
> +
> + s2mps13_osc: clocks {
> + compatible = "samsung,s2mps13-clk";
> + #clock-cells = <1>;
> + clock-output-names = "s2mps13_ap", "s2mps13_cp",
> + "s2mps13_bt";
> + };
> +
I see that most of the following regulators are marked as always-on
but I wonder if this is really needed. For example some of them are
looked up by consumer devices.
[snip]
> + };
> +
> + ldo3_reg: LDO3 {
> + regulator-name = "VDD1_E_1.8V_AP";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-always-on;
> + };
This is used by both the ADC and the TMU so I guess it should be safe
to not mark it as always-on (unless is used by other critical IP block
not described in the DT).
[snip]
> +
> + ldo6_reg: LDO6 {
> + regulator-name = "VDD10_MIPI2L_1.0V_AP";
> + regulator-min-microvolt = <1000000>;
> + regulator-max-microvolt = <1000000>;
> + regulator-always-on;
Same question, this is used by both the dsi and usbdrd30 nodes so maybe
it shouldn't be marked as always-on as well.
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo7_reg: LDO7 {
> + regulator-name = "VDD18_MIPI2L_1.8V_AP";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-always-on;
This is used by the dsi node as well.
[snip]
> +
> + ldo10_reg: LDO10 {
> + regulator-name = "VDD33_USB30_3.0V_AP";
> + regulator-min-microvolt = <3000000>;
> + regulator-max-microvolt = <3000000>;
> + regulator-always-on;
Use by the usbdrd30 node.
[snip]
> +
> + ldo18_reg: LDO18 {
> + regulator-name = "V_CODEC_1.8V_AP";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-always-on;
Use by the wm5110-codec node.
[snip]
> +
> + buck2_reg: BUCK2 {
> + regulator-name = "VDD_EGL_1.0V_AP";
I wonder if this shouldn't be "VDD_ATL_1.0V_AP" or something since
the big cluster isn't called Eagle like in arm32 Exynos but Atlas?
> + regulator-min-microvolt = <900000>;
> + regulator-max-microvolt = <1300000>;
> + regulator-always-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + buck3_reg: BUCK3 {
> + regulator-name = "VDD_KFC_1.0V_AP";
Same, maybe using "VDD_APL_1.0V_AP" since the big cluster is Apollo?
> + regulator-min-microvolt = <800000>;
> + regulator-max-microvolt = <1200000>;
> + regulator-always-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
Used by the big and LITTLE clusters respectively, although for these two
I'm not that sure if it would be safe to remove the always-on property.
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
[0]: http://www.spinics.net/lists/arm-kernel/msg419747.html
Best regards,
--
Javier Martinez Canillas
Open Source Group
Samsung Research America
next prev parent reply other threads:[~2016-08-26 18:30 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-24 13:49 [PATCH v2 0/7] arm64: dts: Add the dts file for Exynos5433 and TM/TM2E board Chanwoo Choi
2016-08-24 13:49 ` [PATCH v2 1/7] clocksource: exynos_mct: Add the support for ARM64 Chanwoo Choi
2016-08-26 16:02 ` Krzysztof Kozlowski
[not found] ` <562e232f-7e69-6d54-e49d-36042d166800@linaro.org>
[not found] ` <CGME20160916111052eucas1p1fb19531ab7b3e53f6fdeb4fa0e8a5449@eucas1p1.samsung.com>
2016-09-16 11:10 ` Krzysztof Kozlowski
2016-08-24 13:49 ` [PATCH v2 2/7] Documentation: bindings: Add Exynos5433 PMU compatible Chanwoo Choi
2016-08-24 13:49 ` [PATCH v2 3/7] pinctrl: samsung: Add the support the multiple IORESOURCE_MEM for one pin-bank Chanwoo Choi
2016-08-25 14:30 ` Tomasz Figa
2016-08-25 14:41 ` Tomasz Figa
2016-09-05 8:08 ` Chanwoo Choi
2016-09-20 1:03 ` Tomasz Figa
2016-08-24 13:49 ` [PATCH v2 4/7] pinctrl: samsung: Add GPF support for Exynos5433 Chanwoo Choi
2016-08-25 14:34 ` Tomasz Figa
2016-08-24 13:49 ` [PATCH v2 5/7] arm64: dts: exynos: Add dts files for Samsung Exynos5433 64bit SoC Chanwoo Choi
2016-08-26 16:14 ` Krzysztof Kozlowski
2016-09-02 9:54 ` Chanwoo Choi
2016-08-26 17:49 ` Javier Martinez Canillas
2016-09-02 10:59 ` Chanwoo Choi
2016-09-07 7:55 ` Javier Martinez Canillas
2016-10-04 13:37 ` Geert Uytterhoeven
2016-10-04 13:46 ` Krzysztof Kozlowski
2016-08-24 13:49 ` [PATCH v2 6/7] arm64: dts: exynos: Add dts file for Exynos5433-based TM2 board Chanwoo Choi
2016-08-25 9:28 ` kbuild test robot
2016-08-26 16:32 ` Krzysztof Kozlowski
2016-08-26 17:11 ` Krzysztof Kozlowski
2016-08-26 20:46 ` Chanwoo Choi
2016-08-26 18:30 ` Javier Martinez Canillas [this message]
2016-08-26 18:35 ` Javier Martinez Canillas
2016-09-02 11:29 ` Chanwoo Choi
2016-09-07 8:08 ` Javier Martinez Canillas
2016-08-30 17:11 ` Rob Herring
2016-08-31 1:24 ` Chanwoo Choi
2016-08-24 13:49 ` [PATCH v2 7/7] arm64: dts: exynos: Add dts file for Exynos5433-based TM2E board Chanwoo Choi
2016-08-26 18:32 ` Javier Martinez Canillas
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