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Message-ID: <VE1PR04MB66886DD55CFB71F2E50205F589309@VE1PR04MB6688.eurprd04.prod.outlook.com>
Date: Tue, 15 Jun 2021 09:35:10 +0000
From: Robin Gong <yibin.gong@....com>
To: Shawn Guo <shawnguo@...nel.org>
CC: Alice Guo <alice.guo@....com>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
"festevam@...il.com" <festevam@...il.com>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
dl-linux-imx <linux-imx@....com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v1] arm64: dts: imx8mx: move soc device into ocotp
On 12/06/21 16:01 Shawn Guo <shawnguo@...nel.org> wrote:
> On Tue, Jun 08, 2021 at 02:05:12AM +0800, Robin Gong wrote:
> > move soc device into ocotp device node instead of the parent device of
> > the all devices which located in 'soc@0', otherwise, all probed
> > children devices will be reorder to dmp_list again once 'imx8mx-soc'
> > device defered probed, which may break driver's suspend/resume
> > sequence, such as imx_spdif and fsl_spdif, hence the later would
> > suspended before the former as below and endless interrupt may never
> > be handled since clock has been disabled already in the later.
> >
> > [ 1.930598] calling fsl_spdif_driver_init+0x0/0x20 @ 1
> > [ 1.955712] initcall fsl_spdif_driver_init+0x0/0x20 returned 0 after
> 24512 usecs
> > [ 1.981963] calling imx_spdif_driver_init+0x0/0x20 @ 1
> > [ 1.986600] initcall imx_spdif_driver_init+0x0/0x20 returned 0 after
> 4509 usecs
> > [ 2.901408] #0: imx-spdif
> > [ 21.151529] fsl-spdif-dai 30090000.spdif: calling
> platform_pm_suspend+0x0/0x70 @ 470, parent: 30000000.bus
> > [ 21.161189] fsl-spdif-dai 30090000.spdif:
> platform_pm_suspend+0x0/0x70 returned 0 after 0 usecs
> > [ 21.474311] imx-spdif sound-spdif: calling
> platform_pm_suspend+0x0/0x70 @ 470, parent: platform
> > [ 21.483024] imx-spdif sound-spdif: platform_pm_suspend+0x0/0x70
> returned 0 after 9 usecs
>
> DT is written as a description of hardware, not for resolving Linux specific
> issue.
Yes. But this issue is brought by previous patch in dts as below which force all IP
devices in soc@0 to be children devices of 'imx8mx-soc' platform device. Maybe
I should split it into several patches to fix below per soc to make things clear.
commit ce58459d8c7f4174e7b8a8ea903dd949631334a3
Author: Alice Guo <alice.guo@....com>
Date: Mon Jan 4 17:15:42 2021 +0800
arm64: dts: imx8m: add SoC ID compatible
Add compatible string to .dtsi files for binding of imx8_soc_info and
device.
>
> >
> > Signed-off-by: Robin Gong <yibin.gong@....com>
> > ---
> > arch/arm64/boot/dts/freescale/imx8mm.dtsi | 12 ++++++++----
> > arch/arm64/boot/dts/freescale/imx8mn.dtsi | 13 +++++++++----
> > arch/arm64/boot/dts/freescale/imx8mp.dtsi | 13 +++++++++----
> > arch/arm64/boot/dts/freescale/imx8mq.dtsi | 12 ++++++++----
> > 4 files changed, 34 insertions(+), 16 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > index e7648c3..9ef0554 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> > @@ -257,13 +257,11 @@
> > };
> >
> > soc@0 {
> > - compatible = "fsl,imx8mm-soc", "simple-bus";
> > + compatible = "simple-bus";
> > #address-cells = <1>;
> > #size-cells = <1>;
> > ranges = <0x0 0x0 0x0 0x3e000000>;
> > dma-ranges = <0x40000000 0x0 0x40000000 0xc0000000>;
> > - nvmem-cells = <&imx8mm_uid>;
> > - nvmem-cell-names = "soc_unique_id";
> >
> > aips1: bus@...00000 {
> > compatible = "fsl,aips-bus", "simple-bus"; @@ -522,7 +520,7
> @@
> > };
> >
> > ocotp: efuse@...50000 {
> > - compatible = "fsl,imx8mm-ocotp", "syscon";
> > + compatible = "fsl,imx8mm-ocotp", "syscon", "simple-mfd";
> > reg = <0x30350000 0x10000>;
> > clocks = <&clk IMX8MM_CLK_OCOTP_ROOT>;
> > /* For nvmem subnodes */
> > @@ -540,6 +538,12 @@
> > fec_mac_address: mac-address@90 {
> > reg = <0x90 6>;
> > };
> > +
> > + imx8mm_soc: imx8mm-soc {
> > + compatible = "fsl,imx8mm-soc";
> > + nvmem-cells = <&imx8mm_uid>;
> > + nvmem-cell-names = "soc_unique_id";
> > + };
> > };
> >
> > anatop: anatop@...60000 {
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> > b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> > index d4231e0..f82905c 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> > @@ -241,13 +241,11 @@
> > };
> >
> > soc@0 {
> > - compatible = "fsl,imx8mn-soc", "simple-bus";
> > + compatible = "simple-bus";
> > #address-cells = <1>;
> > #size-cells = <1>;
> > ranges = <0x0 0x0 0x0 0x3e000000>;
> > dma-ranges = <0x40000000 0x0 0x40000000 0xc0000000>;
> > - nvmem-cells = <&imx8mn_uid>;
> > - nvmem-cell-names = "soc_unique_id";
> >
> > aips1: bus@...00000 {
> > compatible = "fsl,aips-bus", "simple-bus"; @@ -528,7 +526,8
> @@
> > };
> >
> > ocotp: efuse@...50000 {
> > - compatible = "fsl,imx8mn-ocotp", "fsl,imx8mm-ocotp",
> "syscon";
> > + compatible = "fsl,imx8mn-ocotp", "fsl,imx8mm-ocotp",
> "syscon",
> > + "simple-mfd";
> > reg = <0x30350000 0x10000>;
> > clocks = <&clk IMX8MN_CLK_OCOTP_ROOT>;
> > #address-cells = <1>;
> > @@ -545,6 +544,12 @@
> > fec_mac_address: mac-address@90 {
> > reg = <0x90 6>;
> > };
> > +
> > + imx8mn_soc: imx8mn-soc {
> > + compatible = "fsl,imx8mn-soc";
> > + nvmem-cells = <&imx8mn_uid>;
> > + nvmem-cell-names = "soc_unique_id";
> > + };
> > };
> >
> > anatop: anatop@...60000 {
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > index 9f7c7f5..d113691 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > @@ -220,12 +220,10 @@
> > };
> >
> > soc@0 {
> > - compatible = "fsl,imx8mp-soc", "simple-bus";
> > + compatible = "simple-bus";
> > #address-cells = <1>;
> > #size-cells = <1>;
> > ranges = <0x0 0x0 0x0 0x3e000000>;
> > - nvmem-cells = <&imx8mp_uid>;
> > - nvmem-cell-names = "soc_unique_id";
> >
> > aips1: bus@...00000 {
> > compatible = "fsl,aips-bus", "simple-bus"; @@ -341,7 +339,8
> @@
> > };
> >
> > ocotp: efuse@...50000 {
> > - compatible = "fsl,imx8mp-ocotp", "fsl,imx8mm-ocotp",
> "syscon";
> > + compatible = "fsl,imx8mp-ocotp", "fsl,imx8mm-ocotp",
> "syscon",
> > + "simple-mfd";
> > reg = <0x30350000 0x10000>;
> > clocks = <&clk IMX8MP_CLK_OCOTP_ROOT>;
> > /* For nvmem subnodes */
> > @@ -359,6 +358,12 @@
> > eth_mac1: mac-address@90 {
> > reg = <0x90 6>;
> > };
> > +
> > + imx8mp_soc: imx8mp-soc {
> > + compatible = "fsl,imx8mp-soc";
> > + nvmem-cells = <&imx8mp_uid>;
> > + nvmem-cell-names = "soc_unique_id";
> > + };
> > };
> >
> > anatop: anatop@...60000 {
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > index 91df9c5..8cfbc77 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> > @@ -287,13 +287,11 @@
> > };
> >
> > soc@0 {
> > - compatible = "fsl,imx8mq-soc", "simple-bus";
> > + compatible = "simple-bus";
> > #address-cells = <1>;
> > #size-cells = <1>;
> > ranges = <0x0 0x0 0x0 0x3e000000>;
> > dma-ranges = <0x40000000 0x0 0x40000000 0xc0000000>;
> > - nvmem-cells = <&imx8mq_uid>;
> > - nvmem-cell-names = "soc_unique_id";
> >
> > bus@...00000 { /* AIPS1 */
> > compatible = "fsl,aips-bus", "simple-bus"; @@ -554,7 +552,7
> @@
> > };
> >
> > ocotp: efuse@...50000 {
> > - compatible = "fsl,imx8mq-ocotp", "syscon";
> > + compatible = "fsl,imx8mq-ocotp", "syscon", "simple-mfd";
> > reg = <0x30350000 0x10000>;
> > clocks = <&clk IMX8MQ_CLK_OCOTP_ROOT>;
> > #address-cells = <1>;
> > @@ -571,6 +569,12 @@
> > fec_mac_address: mac-address@90 {
> > reg = <0x90 6>;
> > };
> > +
> > + imx8mq_soc: imx8mq-soc {
> > + compatible = "fsl,imx8mq-soc";
> > + nvmem-cells = <&imx8mq_uid>;
> > + nvmem-cell-names = "soc_unique_id";
> > + };
> > };
> >
> > anatop: syscon@...60000 {
> > --
> > 2.7.4
> >
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