Re: [Linux-stm32] [PATCH v3 6/6] ARM: dts: stm32: add ETZPC as a system bus for STM32MP13x boards

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Hello Ahmad,

Sorry for the delay :)

On 2/13/23 12:27, Ahmad Fatoum wrote:

Hello Gatien,

On 13.02.23 11:54, Gatien CHEVALLIER wrote:

On 2/9/23 09:10, Ahmad Fatoum wrote:

On 09.02.23 08:46, Ahmad Fatoum wrote:

Hello Gatien,

On 27.01.23 17:40, Gatien Chevallier wrote:

The STM32 System Bus is an internal bus on which devices are connected.
ETZPC is a peripheral overseeing the firewall bus that configures
and control access to the peripherals connected on it.

For more information on which peripheral is securable, please read
the STM32MP13 reference manual.


Diff is way too big. Please split up the alphabetic reordering into its
own commit, so actual functional changes are apparent.


Ah, I see now that you are moving securable peripherals into a new bus.
I share Uwe's confusion of considering the ETZPC as bus.

Does this configuration even change dynamically? Why can't you implement
this binding in the bootloader and have Linux only see a DT where unavailable
nodes are status = "disabled"; secure-status = "okay"?

For inspiration, see barebox' device tree fixups when devices are disabled
per fuse:

    https://elixir.bootlin.com/barebox/v2023.01.0/source/drivers/base/featctrl.c#L122

Cheers,
Ahmad


This configuration can change dynamically. The binding will be implemented in the bootloader, where the ETZPC is already implemented as a bus in our downstream.

I find the mentionned example valid.

Now, why is it a bus? :D

It is the result of the discussion on the previous submission by Benjamin (Sorry for the lack of link but I saw that you participated on these threads)+ we need the bus mechanism to control whether a subnode should be probed or not. You can see it as a firewall bus.

The ETZPC relies on the ARM TrustZone extension to the AHB bus and propagation through bridges to the APB bus. Therefore, I find it relevant to consider it as a bus, what is your opinion?

This patchset is a first step to the implementation of an API to control accesses dynamically.


I still don't get what's dynamic about this. Either:

   - Configuration _can_ change while Linux is running: You'll need to do
     way more than what your current bus provides to somwhow synchronize state
     with the secure monitor; otherwise a newly secured device will cause the driver
     to trigger data aborts that you'll have to handle and unbind the driver.
     (like if a USB drive is yanked out).

   - Configuration _can't_ change while Linux is running: You can have the bootloader
     fixup the device tree and Linux need not care at all about devices that the
     ETZPC is securing.

My understanding is that the latter is your use case, so I don't see why we
even need the normal world to be aware of the partitioning.

Cheers,
Ahmad
What about the case where we do not have a U-Boot/bootloader to fixup the device tree?
On the other hand, ETZPC is a hardware firewall and is on the bus. Therefore, shouldn't it be represented as a bus in the file that describes the hardware? 

Best regards,
Gatien







Thanks,
Ahmad



Signed-off-by: Gatien Chevallier <gatien.chevallier@xxxxxxxxxxx>
---

No changes in V2.

Changes in V3:
     -Use appriopriate node name: bus

   arch/arm/boot/dts/stm32mp131.dtsi  | 407 +++++++++++++++--------------
   arch/arm/boot/dts/stm32mp133.dtsi  |  51 ++--
   arch/arm/boot/dts/stm32mp13xc.dtsi |  19 +-
   arch/arm/boot/dts/stm32mp13xf.dtsi |  18 +-
   4 files changed, 258 insertions(+), 237 deletions(-)

diff --git a/arch/arm/boot/dts/stm32mp131.dtsi b/arch/arm/boot/dts/stm32mp131.dtsi
index accc3824f7e9..24462a647101 100644
--- a/arch/arm/boot/dts/stm32mp131.dtsi
+++ b/arch/arm/boot/dts/stm32mp131.dtsi
@@ -253,148 +253,6 @@ dmamux1: dma-router@48002000 {
               dma-channels = <16>;
           };
   -        adc_2: adc@48004000 {
-            compatible = "st,stm32mp13-adc-core";
-            reg = <0x48004000 0x400>;
-            interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc ADC2>, <&rcc ADC2_K>;
-            clock-names = "bus", "adc";
-            interrupt-controller;
-            #interrupt-cells = <1>;
-            #address-cells = <1>;
-            #size-cells = <0>;
-            status = "disabled";
-
-            adc2: adc@0 {
-                compatible = "st,stm32mp13-adc";
-                #io-channel-cells = <1>;
-                #address-cells = <1>;
-                #size-cells = <0>;
-                reg = <0x0>;
-                interrupt-parent = <&adc_2>;
-                interrupts = <0>;
-                dmas = <&dmamux1 10 0x400 0x80000001>;
-                dma-names = "rx";
-                status = "disabled";
-
-                channel@13 {
-                    reg = <13>;
-                    label = "vrefint";
-                };
-                channel@14 {
-                    reg = <14>;
-                    label = "vddcore";
-                };
-                channel@16 {
-                    reg = <16>;
-                    label = "vddcpu";
-                };
-                channel@17 {
-                    reg = <17>;
-                    label = "vddq_ddr";
-                };
-            };
-        };
-
-        usbotg_hs: usb@49000000 {
-            compatible = "st,stm32mp15-hsotg", "snps,dwc2";
-            reg = <0x49000000 0x40000>;
-            clocks = <&rcc USBO_K>;
-            clock-names = "otg";
-            resets = <&rcc USBO_R>;
-            reset-names = "dwc2";
-            interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
-            g-rx-fifo-size = <512>;
-            g-np-tx-fifo-size = <32>;
-            g-tx-fifo-size = <256 16 16 16 16 16 16 16>;
-            dr_mode = "otg";
-            otg-rev = <0x200>;
-            usb33d-supply = <&usb33>;
-            status = "disabled";
-        };
-
-        spi4: spi@4c002000 {
-            compatible = "st,stm32h7-spi";
-            reg = <0x4c002000 0x400>;
-            interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc SPI4_K>;
-            resets = <&rcc SPI4_R>;
-            #address-cells = <1>;
-            #size-cells = <0>;
-            dmas = <&dmamux1 83 0x400 0x01>,
-                   <&dmamux1 84 0x400 0x01>;
-            dma-names = "rx", "tx";
-            status = "disabled";
-        };
-
-        spi5: spi@4c003000 {
-            compatible = "st,stm32h7-spi";
-            reg = <0x4c003000 0x400>;
-            interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc SPI5_K>;
-            resets = <&rcc SPI5_R>;
-            #address-cells = <1>;
-            #size-cells = <0>;
-            dmas = <&dmamux1 85 0x400 0x01>,
-                   <&dmamux1 86 0x400 0x01>;
-            dma-names = "rx", "tx";
-            status = "disabled";
-        };
-
-        i2c3: i2c@4c004000 {
-            compatible = "st,stm32mp13-i2c";
-            reg = <0x4c004000 0x400>;
-            interrupt-names = "event", "error";
-            interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>,
-                     <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc I2C3_K>;
-            resets = <&rcc I2C3_R>;
-            #address-cells = <1>;
-            #size-cells = <0>;
-            dmas = <&dmamux1 73 0x400 0x1>,
-                   <&dmamux1 74 0x400 0x1>;
-            dma-names = "rx", "tx";
-            st,syscfg-fmp = <&syscfg 0x4 0x4>;
-            i2c-analog-filter;
-            status = "disabled";
-        };
-
-        i2c4: i2c@4c005000 {
-            compatible = "st,stm32mp13-i2c";
-            reg = <0x4c005000 0x400>;
-            interrupt-names = "event", "error";
-            interrupts = <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>,
-                     <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc I2C4_K>;
-            resets = <&rcc I2C4_R>;
-            #address-cells = <1>;
-            #size-cells = <0>;
-            dmas = <&dmamux1 75 0x400 0x1>,
-                   <&dmamux1 76 0x400 0x1>;
-            dma-names = "rx", "tx";
-            st,syscfg-fmp = <&syscfg 0x4 0x8>;
-            i2c-analog-filter;
-            status = "disabled";
-        };
-
-        i2c5: i2c@4c006000 {
-            compatible = "st,stm32mp13-i2c";
-            reg = <0x4c006000 0x400>;
-            interrupt-names = "event", "error";
-            interrupts = <GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH>,
-                     <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc I2C5_K>;
-            resets = <&rcc I2C5_R>;
-            #address-cells = <1>;
-            #size-cells = <0>;
-            dmas = <&dmamux1 115 0x400 0x1>,
-                   <&dmamux1 116 0x400 0x1>;
-            dma-names = "rx", "tx";
-            st,syscfg-fmp = <&syscfg 0x4 0x10>;
-            i2c-analog-filter;
-            status = "disabled";
-        };
-
           rcc: rcc@50000000 {
               compatible = "st,stm32mp13-rcc", "syscon";
               reg = <0x50000000 0x1000>;
@@ -431,34 +289,6 @@ mdma: dma-controller@58000000 {
               dma-requests = <48>;
           };
   -        sdmmc1: mmc@58005000 {
-            compatible = "st,stm32-sdmmc2", "arm,pl18x", "arm,primecell";
-            arm,primecell-periphid = <0x20253180>;
-            reg = <0x58005000 0x1000>, <0x58006000 0x1000>;
-            interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc SDMMC1_K>;
-            clock-names = "apb_pclk";
-            resets = <&rcc SDMMC1_R>;
-            cap-sd-highspeed;
-            cap-mmc-highspeed;
-            max-frequency = <130000000>;
-            status = "disabled";
-        };
-
-        sdmmc2: mmc@58007000 {
-            compatible = "st,stm32-sdmmc2", "arm,pl18x", "arm,primecell";
-            arm,primecell-periphid = <0x20253180>;
-            reg = <0x58007000 0x1000>, <0x58008000 0x1000>;
-            interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc SDMMC2_K>;
-            clock-names = "apb_pclk";
-            resets = <&rcc SDMMC2_R>;
-            cap-sd-highspeed;
-            cap-mmc-highspeed;
-            max-frequency = <130000000>;
-            status = "disabled";
-        };
-
           usbh_ohci: usb@5800c000 {
               compatible = "generic-ohci";
               reg = <0x5800c000 0x1000>;
@@ -486,29 +316,6 @@ iwdg2: watchdog@5a002000 {
               status = "disabled";
           };
   -        usbphyc: usbphyc@5a006000 {
-            #address-cells = <1>;
-            #size-cells = <0>;
-            #clock-cells = <0>;
-            compatible = "st,stm32mp1-usbphyc";
-            reg = <0x5a006000 0x1000>;
-            clocks = <&rcc USBPHY_K>;
-            resets = <&rcc USBPHY_R>;
-            vdda1v1-supply = <&reg11>;
-            vdda1v8-supply = <&reg18>;
-            status = "disabled";
-
-            usbphyc_port0: usb-phy@0 {
-                #phy-cells = <0>;
-                reg = <0>;
-            };
-
-            usbphyc_port1: usb-phy@1 {
-                #phy-cells = <1>;
-                reg = <1>;
-            };
-        };
-
           rtc: rtc@5c004000 {
               compatible = "st,stm32mp1-rtc";
               reg = <0x5c004000 0x400>;
@@ -536,6 +343,220 @@ ts_cal2: calib@5e {
               };
           };
   +        etzpc: bus@5c007000 {
+            compatible = "st,stm32mp13-sys-bus";
+            reg = <0x5c007000 0x400>;
+            #address-cells = <1>;
+            #size-cells = <1>;
+            feature-domain-controller;
+            #feature-domain-cells = <1>;
+            ranges;
+
+            adc_2: adc@48004000 {
+                compatible = "st,stm32mp13-adc-core";
+                reg = <0x48004000 0x400>;
+                interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
+                clocks = <&rcc ADC2>, <&rcc ADC2_K>;
+                clock-names = "bus", "adc";
+                interrupt-controller;
+                #interrupt-cells = <1>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+                feature-domains = <&etzpc 33>;
+                status = "disabled";
+
+                adc2: adc@0 {
+                    compatible = "st,stm32mp13-adc";
+                    #io-channel-cells = <1>;
+                    #address-cells = <1>;
+                    #size-cells = <0>;
+                    reg = <0x0>;
+                    interrupt-parent = <&adc_2>;
+                    interrupts = <0>;
+                    dmas = <&dmamux1 10 0x400 0x80000001>;
+                    dma-names = "rx";
+                    status = "disabled";
+
+                    channel@13 {
+                        reg = <13>;
+                        label = "vrefint";
+                    };
+                    channel@14 {
+                        reg = <14>;
+                        label = "vddcore";
+                    };
+                    channel@16 {
+                        reg = <16>;
+                        label = "vddcpu";
+                    };
+                    channel@17 {
+                        reg = <17>;
+                        label = "vddq_ddr";
+                    };
+                };
+            };
+
+            usbotg_hs: usb@49000000 {
+                compatible = "st,stm32mp15-hsotg", "snps,dwc2";
+                reg = <0x49000000 0x40000>;
+                clocks = <&rcc USBO_K>;
+                clock-names = "otg";
+                resets = <&rcc USBO_R>;
+                reset-names = "dwc2";
+                interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
+                g-rx-fifo-size = <512>;
+                g-np-tx-fifo-size = <32>;
+                g-tx-fifo-size = <256 16 16 16 16 16 16 16>;
+                dr_mode = "otg";
+                otg-rev = <0x200>;
+                usb33d-supply = <&usb33>;
+                feature-domains = <&etzpc 34>;
+                status = "disabled";
+            };
+
+            spi4: spi@4c002000 {
+                compatible = "st,stm32h7-spi";
+                reg = <0x4c002000 0x400>;
+                interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
+                clocks = <&rcc SPI4_K>;
+                resets = <&rcc SPI4_R>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+                dmas = <&dmamux1 83 0x400 0x01>,
+                       <&dmamux1 84 0x400 0x01>;
+                dma-names = "rx", "tx";
+                feature-domains = <&etzpc 18>;
+                status = "disabled";
+            };
+
+            spi5: spi@4c003000 {
+                compatible = "st,stm32h7-spi";
+                reg = <0x4c003000 0x400>;
+                interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
+                clocks = <&rcc SPI5_K>;
+                resets = <&rcc SPI5_R>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+                dmas = <&dmamux1 85 0x400 0x01>,
+                       <&dmamux1 86 0x400 0x01>;
+                dma-names = "rx", "tx";
+                feature-domains = <&etzpc 19>;
+                status = "disabled";
+            };
+
+            i2c3: i2c@4c004000 {
+                compatible = "st,stm32mp13-i2c";
+                reg = <0x4c004000 0x400>;
+                interrupt-names = "event", "error";
+                interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
+                clocks = <&rcc I2C3_K>;
+                resets = <&rcc I2C3_R>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+                dmas = <&dmamux1 73 0x400 0x1>,
+                       <&dmamux1 74 0x400 0x1>;
+                dma-names = "rx", "tx";
+                st,syscfg-fmp = <&syscfg 0x4 0x4>;
+                i2c-analog-filter;
+                feature-domains = <&etzpc 20>;
+                status = "disabled";
+            };
+
+            i2c4: i2c@4c005000 {
+                compatible = "st,stm32mp13-i2c";
+                reg = <0x4c005000 0x400>;
+                interrupt-names = "event", "error";
+                interrupts = <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
+                clocks = <&rcc I2C4_K>;
+                resets = <&rcc I2C4_R>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+                dmas = <&dmamux1 75 0x400 0x1>,
+                       <&dmamux1 76 0x400 0x1>;
+                dma-names = "rx", "tx";
+                st,syscfg-fmp = <&syscfg 0x4 0x8>;
+                i2c-analog-filter;
+                feature-domains = <&etzpc 21>;
+                status = "disabled";
+            };
+
+            i2c5: i2c@4c006000 {
+                compatible = "st,stm32mp13-i2c";
+                reg = <0x4c006000 0x400>;
+                interrupt-names = "event", "error";
+                interrupts = <GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
+                clocks = <&rcc I2C5_K>;
+                resets = <&rcc I2C5_R>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+                dmas = <&dmamux1 115 0x400 0x1>,
+                       <&dmamux1 116 0x400 0x1>;
+                dma-names = "rx", "tx";
+                st,syscfg-fmp = <&syscfg 0x4 0x10>;
+                i2c-analog-filter;
+                feature-domains = <&etzpc 22>;
+                status = "disabled";
+            };
+
+            sdmmc1: mmc@58005000 {
+                compatible = "st,stm32-sdmmc2", "arm,pl18x", "arm,primecell";
+                arm,primecell-periphid = <0x20253180>;
+                reg = <0x58005000 0x1000>, <0x58006000 0x1000>;
+                interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
+                clocks = <&rcc SDMMC1_K>;
+                clock-names = "apb_pclk";
+                resets = <&rcc SDMMC1_R>;
+                cap-sd-highspeed;
+                cap-mmc-highspeed;
+                max-frequency = <130000000>;
+                feature-domains = <&etzpc 50>;
+                status = "disabled";
+            };
+
+            sdmmc2: mmc@58007000 {
+                compatible = "st,stm32-sdmmc2", "arm,pl18x", "arm,primecell";
+                arm,primecell-periphid = <0x20253180>;
+                reg = <0x58007000 0x1000>, <0x58008000 0x1000>;
+                interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
+                clocks = <&rcc SDMMC2_K>;
+                clock-names = "apb_pclk";
+                resets = <&rcc SDMMC2_R>;
+                cap-sd-highspeed;
+                cap-mmc-highspeed;
+                max-frequency = <130000000>;
+                feature-domains = <&etzpc 51>;
+                status = "disabled";
+            };
+
+            usbphyc: usbphyc@5a006000 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                #clock-cells = <0>;
+                compatible = "st,stm32mp1-usbphyc";
+                reg = <0x5a006000 0x1000>;
+                clocks = <&rcc USBPHY_K>;
+                resets = <&rcc USBPHY_R>;
+                vdda1v1-supply = <&reg11>;
+                vdda1v8-supply = <&reg18>;
+                feature-domains = <&etzpc 5>;
+                status = "disabled";
+
+                usbphyc_port0: usb-phy@0 {
+                    #phy-cells = <0>;
+                    reg = <0>;
+                };
+
+                usbphyc_port1: usb-phy@1 {
+                    #phy-cells = <1>;
+                    reg = <1>;
+                };
+            };
+
+        };
+
           /*
            * Break node order to solve dependency probe issue between
            * pinctrl and exti.
diff --git a/arch/arm/boot/dts/stm32mp133.dtsi b/arch/arm/boot/dts/stm32mp133.dtsi
index df451c3c2a26..be6061552683 100644
--- a/arch/arm/boot/dts/stm32mp133.dtsi
+++ b/arch/arm/boot/dts/stm32mp133.dtsi
@@ -33,35 +33,38 @@ m_can2: can@4400f000 {
               bosch,mram-cfg = <0x1400 0 0 32 0 0 2 2>;
               status = "disabled";
           };
+    };
+};
   -        adc_1: adc@48003000 {
-            compatible = "st,stm32mp13-adc-core";
-            reg = <0x48003000 0x400>;
-            interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc ADC1>, <&rcc ADC1_K>;
-            clock-names = "bus", "adc";
-            interrupt-controller;
-            #interrupt-cells = <1>;
+&etzpc {
+    adc_1: adc@48003000 {
+        compatible = "st,stm32mp13-adc-core";
+        reg = <0x48003000 0x400>;
+        interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&rcc ADC1>, <&rcc ADC1_K>;
+        clock-names = "bus", "adc";
+        interrupt-controller;
+        #interrupt-cells = <1>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        feature-domains = <&etzpc 32>;
+        status = "disabled";
+
+        adc1: adc@0 {
+            compatible = "st,stm32mp13-adc";
+            #io-channel-cells = <1>;
               #address-cells = <1>;
               #size-cells = <0>;
+            reg = <0x0>;
+            interrupt-parent = <&adc_1>;
+            interrupts = <0>;
+            dmas = <&dmamux1 9 0x400 0x80000001>;
+            dma-names = "rx";
               status = "disabled";
   -            adc1: adc@0 {
-                compatible = "st,stm32mp13-adc";
-                #io-channel-cells = <1>;
-                #address-cells = <1>;
-                #size-cells = <0>;
-                reg = <0x0>;
-                interrupt-parent = <&adc_1>;
-                interrupts = <0>;
-                dmas = <&dmamux1 9 0x400 0x80000001>;
-                dma-names = "rx";
-                status = "disabled";
-
-                channel@18 {
-                    reg = <18>;
-                    label = "vrefint";
-                };
+            channel@18 {
+                reg = <18>;
+                label = "vrefint";
               };
           };
       };
diff --git a/arch/arm/boot/dts/stm32mp13xc.dtsi b/arch/arm/boot/dts/stm32mp13xc.dtsi
index 4d00e7592882..a1a7a40c2a3e 100644
--- a/arch/arm/boot/dts/stm32mp13xc.dtsi
+++ b/arch/arm/boot/dts/stm32mp13xc.dtsi
@@ -4,15 +4,14 @@
    * Author: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx> for STMicroelectronics.
    */
   -/ {
-    soc {
-        cryp: crypto@54002000 {
-            compatible = "st,stm32mp1-cryp";
-            reg = <0x54002000 0x400>;
-            interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc CRYP1>;
-            resets = <&rcc CRYP1_R>;
-            status = "disabled";
-        };
+&etzpc {
+    cryp: crypto@54002000 {
+        compatible = "st,stm32mp1-cryp";
+        reg = <0x54002000 0x400>;
+        interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&rcc CRYP1>;
+        resets = <&rcc CRYP1_R>;
+        feature-domains = <&etzpc 42>;
+        status = "disabled";
       };
   };
diff --git a/arch/arm/boot/dts/stm32mp13xf.dtsi b/arch/arm/boot/dts/stm32mp13xf.dtsi
index 4d00e7592882..b9fb071a1471 100644
--- a/arch/arm/boot/dts/stm32mp13xf.dtsi
+++ b/arch/arm/boot/dts/stm32mp13xf.dtsi
@@ -4,15 +4,13 @@
    * Author: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx> for STMicroelectronics.
    */
   -/ {
-    soc {
-        cryp: crypto@54002000 {
-            compatible = "st,stm32mp1-cryp";
-            reg = <0x54002000 0x400>;
-            interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&rcc CRYP1>;
-            resets = <&rcc CRYP1_R>;
-            status = "disabled";
-        };
+&etzpc {
+    cryp: crypto@54002000 {
+        compatible = "st,stm32mp1-cryp";
+        reg = <0x54002000 0x400>;
+        interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&rcc CRYP1>;
+        resets = <&rcc CRYP1_R>;
+        status = "disabled";
       };
   };






Regarding the patch itself, I can separate it in two patches.
1)Introduce ETZPC
2)Move peripherals under ETZPC

Best regards,
Gatien
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