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Date: Thu, 14 Feb 2019 13:41:13 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Anand Moon <linux.amoon@...il.com>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
"linux-samsung-soc@...r.kernel.org"
<linux-samsung-soc@...r.kernel.org>, linux-kernel@...r.kernel.org,
Rob Herring <robh+dt@...nel.org>,
Kukjin Kim <kgene@...nel.org>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Tomasz Figa <tomasz.figa@...il.com>,
Chanwoo Choi <cw00.choi@...sung.com>,
Pankaj Dubey <pankaj.dubey@...sung.com>
Subject: Re: [RFC 1/2] ARM: dts: exynos: Add proper regulator states for
suspend-to-mem for odroid-u3
Hi Anand,
Thanks for the patch. See comments below.
On Wed, 13 Feb 2019 at 22:41, Anand Moon <linux.amoon@...il.com> wrote:
>
> Add suspend-to-mem node to regulator core to be enabled or disabled
> during system suspend and also support changing the regulator operating
> mode during runtime and when the system enter sleep mode.
>
> Cc: Marek Szyprowski <m.szyprowski@...sung.com>
> Cc: Krzysztof Kozlowski <krzk@...nel.org>
> Cc: Chanwoo Choi <cw00.choi@...sung.com>
> Signed-off-by: Anand Moon <linux.amoon@...il.com>
> ---
>
> Changes from previos patch
> [0] https://patchwork.kernel.org/patch/10712549/
>
> Set all the WAKEUP source regulator in suspend-on state.
> LD04, LD012, LD015, LD020, LD022
> Set all the non used regulator in suspend-odd state
> LD02, LD03, LD05, LD06, LD07, LD011, LD013, LDO14, LD016
>
> BUCK5, BUCK6, BUCK7 and not confirable as per driver max77686-regulator
>
> Tested on microSD card and it resumes correcly after suspend.
> eMMC is not able to resume after entering into suspend state,
> which need to be investigated and how to debug more.
> ---
> .../boot/dts/exynos4412-odroid-common.dtsi | 63 +++++++++++++++++++
> arch/arm/boot/dts/exynos4412-odroidu3.dts | 3 +
> 2 files changed, 66 insertions(+)
>
> diff --git a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
> index 08d3a0a7b4eb..e984461c37d9 100644
> --- a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
> +++ b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
> @@ -288,6 +288,9 @@
> regulator-min-microvolt = <1800000>;
> regulator-max-microvolt = <1800000>;
> regulator-always-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
I see my comment from previous patch was not addressed.
> };
>
> ldo3_reg: LDO3 {
> @@ -295,6 +298,9 @@
> regulator-min-microvolt = <1800000>;
> regulator-max-microvolt = <1800000>;
> regulator-always-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
The same...
> };
>
> ldo4_reg: LDO4 {
> @@ -302,6 +308,9 @@
> regulator-min-microvolt = <2800000>;
> regulator-max-microvolt = <2800000>;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-on-in-suspend;
> + };
> };
>
> ldo5_reg: LDO5 {
> @@ -310,6 +319,9 @@
> regulator-max-microvolt = <1800000>;
> regulator-always-on;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> ldo6_reg: LDO6 {
> @@ -317,6 +329,9 @@
> regulator-min-microvolt = <1000000>;
> regulator-max-microvolt = <1000000>;
> regulator-always-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> ldo7_reg: LDO7 {
> @@ -324,18 +339,27 @@
> regulator-min-microvolt = <1000000>;
> regulator-max-microvolt = <1000000>;
> regulator-always-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> ldo8_reg: LDO8 {
> regulator-name = "VDD10_HDMI_1.0V";
> regulator-min-microvolt = <1000000>;
> regulator-max-microvolt = <1000000>;
> + regulator-state-mem {
> + regulator-on-in-suspend;
> + };
> };
>
> ldo10_reg: LDO10 {
> regulator-name = "VDDQ_MIPIHSI_1.8V";
> regulator-min-microvolt = <1800000>;
> regulator-max-microvolt = <1800000>;
> + regulator-state-mem {
> + regulator-on-in-suspend;
> + };
> };
>
> ldo11_reg: LDO11 {
> @@ -343,6 +367,9 @@
> regulator-min-microvolt = <1800000>;
> regulator-max-microvolt = <1800000>;
> regulator-always-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> ldo12_reg: LDO12 {
> @@ -351,6 +378,9 @@
> regulator-max-microvolt = <3300000>;
> regulator-always-on;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> ldo13_reg: LDO13 {
> @@ -359,6 +389,9 @@
> regulator-max-microvolt = <1800000>;
> regulator-always-on;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> ldo14_reg: LDO14 {
> @@ -367,6 +400,9 @@
> regulator-max-microvolt = <1800000>;
> regulator-always-on;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> ldo15_reg: LDO15 {
> @@ -375,6 +411,9 @@
> regulator-max-microvolt = <1000000>;
> regulator-always-on;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> ldo16_reg: LDO16 {
> @@ -383,6 +422,9 @@
> regulator-max-microvolt = <1800000>;
> regulator-always-on;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> ldo20_reg: LDO20 {
> @@ -396,6 +438,9 @@
> regulator-min-microvolt = <2800000>;
> regulator-max-microvolt = <2800000>;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-on-in-suspend;
> + };
The same... any comments?
> };
>
> ldo22_reg: LDO22 {
> @@ -405,6 +450,9 @@
> */
> regulator-name = "LDO22";
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-on-in-suspend;
> + };
> };
>
> ldo25_reg: LDO25 {
> @@ -413,6 +461,9 @@
> regulator-max-microvolt = <1800000>;
> regulator-always-on;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> buck1_reg: BUCK1 {
> @@ -421,6 +472,9 @@
> regulator-max-microvolt = <1100000>;
> regulator-always-on;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
Again, you did not address my comments.
> + };
> };
>
> buck2_reg: BUCK2 {
> @@ -429,6 +483,9 @@
> regulator-max-microvolt = <1350000>;
> regulator-always-on;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-on-in-suspend;
> + };
> };
>
> buck3_reg: BUCK3 {
> @@ -437,6 +494,9 @@
> regulator-max-microvolt = <1050000>;
> regulator-always-on;
> regulator-boot-on;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
The same...
> };
>
> buck4_reg: BUCK4 {
> @@ -444,6 +504,9 @@
> regulator-min-microvolt = <900000>;
> regulator-max-microvolt = <1100000>;
> regulator-microvolt-offset = <50000>;
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> };
>
> buck5_reg: BUCK5 {
> diff --git a/arch/arm/boot/dts/exynos4412-odroidu3.dts b/arch/arm/boot/dts/exynos4412-odroidu3.dts
> index 2bdf899df436..4ebde09fc51d 100644
> --- a/arch/arm/boot/dts/exynos4412-odroidu3.dts
> +++ b/arch/arm/boot/dts/exynos4412-odroidu3.dts
> @@ -82,6 +82,9 @@
> regulator-name = "LDO22_VDDQ_MMC4_2.8V";
> regulator-min-microvolt = <2800000>;
> regulator-max-microvolt = <2800000>;
> + regulator-state-mem {
> + regulator-on-in-suspend;
Why?
Best regards,
Krzysztof
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