Merge: Automotive: Backport SPI subsystem to v6.18-rc1

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/merge_requests/1594

JIRA: https://issues.redhat.com/browse/RHEL-104570

Update various SPI drivers that are used by automotive boards.

The list of patches to backport has been generated with:
```
$ ./subsys-commits.py spi -r 10.2
```

Here is an annotated version I used while backporting: [patches_from_subsys_commits.txt](/uploads/5d5a81e2eea46a8a0f985ea4f1b8e951/patches_from_subsys_commits.txt)

There are a bunch of `spi-cadence-quadspi` fixes missing because upstream is broken since commit b07f349.
Here is the list of commits that are missing as of today:

* `b07f349d1864 ("spi: spi-cadence-quadspi: Fix pm runtime unbalance")`
* `04a8ff1bc351 ("spi: cadence-quadspi: fix cleanup of rx_chan on failure paths")`
* `30dbc1c8d50f ("spi: cadence-qspi: defer runtime support on socfpga if reset bit is enabled")`

This will be fixed upstream with: https://lore.kernel.org/all/20251009-cadence-quadspi-fix-pm-runtime-v2-1-8bdfefc43902@kernel.org/

There are also other fixes that are omitted since we only backported up to `v6.18-rc1`:
Omitted-fix: f43579e ("spi: spi-nxp-fspi: limit the clock rate for different sample clock source selection")
Omitted-fix: 6b6e031 ("spi: amlogic: fix spifc build error")
Omitted-fix: a89103f ("spi: spi-nxp-fspi: re-config the clock rate when operation require new clock rate")
Omitted-fix: ee795e8 ("spi: rockchip-sfc: Fix DMA-API usage")

Signed-off-by: Mattijs Korpershoek <mkorpershoek@redhat.com>

Approved-by: Tony Camuso <tcamuso@redhat.com>
Approved-by: John W. Linville <linville@redhat.com>
Approved-by: Brian Masney <bmasney@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: CKI GitLab Kmaint Pipeline Bot <26919896-cki-kmaint-pipeline-bot@users.noreply.gitlab.com>

Author: CKI KWF Bot

Documentation/ABI/testing/sysfs-driver-spi-intel

@@ -0,0 +1,20 @@
+What:		/sys/devices/.../intel_spi_protected
+Date:		Feb 2025
+KernelVersion:	6.13
+Contact:	Alexander Usyskin <alexander.usyskin@intel.com>
+Description:	This attribute allows the userspace to check if the
+		Intel SPI flash controller is write protected from the host.
+
+What:		/sys/devices/.../intel_spi_locked
+Date:		Feb 2025
+KernelVersion:	6.13
+Contact:	Alexander Usyskin <alexander.usyskin@intel.com>
+Description:	This attribute allows the user space to check if the
+		Intel SPI flash controller locks supported opcodes.
+
+What:		/sys/devices/.../intel_spi_bios_locked
+Date:		Feb 2025
+KernelVersion:	6.13
+Contact:	Alexander Usyskin <alexander.usyskin@intel.com>
+Description:	This attribute allows the user space to check if the
+		Intel SPI flash controller BIOS region is locked for writes.

Documentation/devicetree/bindings/connector/gocontroll,moduline-module-slot.yaml

@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/connector/gocontroll,moduline-module-slot.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GOcontroll Moduline Module slot
+
+maintainers:
+  - Maud Spierings <maudspierings@gocontroll.com>
+
+description:
+  The GOcontroll Moduline module slot represents a connector that fullfills the
+  Moduline slot specification, and can thus house any IO module that is also
+  built to this spec.
+
+properties:
+  compatible:
+    const: gocontroll,moduline-module-slot
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description: indicates readiness, high means busy.
+    maxItems: 1
+  reset-gpios:
+    description: resets the module, active low.
+    maxItems: 1
+  sync-gpios:
+    description: sync line between all module slots.
+    maxItems: 1
+
+  vdd-supply:
+    description: low power 3v3 supply generally for the microcontroller.
+  vddp-supply:
+    description: medium power 5v0 supply for on module low power peripherals.
+  vddhpp-supply:
+    description: high power 6v-8v supply for on module high power peripherals.
+  power-supply:
+    description: high power 6v-30v supply for high power module circuits.
+
+  i2c-bus:
+    description: i2c bus shared between module slots and the SoC
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+  slot-number:
+    description:
+      The number of the module slot representing the location of on the pcb.
+      This enables access to the modules based on slot location.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  spi-max-frequency: true
+
+required:
+  - compatible
+  - reg
+  - reset-gpios
+  - interrupts
+  - sync-gpios
+  - i2c-bus
+  - slot-number
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        connector@0 {
+            reg = <0>;
+            compatible = "gocontroll,moduline-module-slot";
+            reset-gpios = <&gpio5 10 GPIO_ACTIVE_LOW>;
+            sync-gpios = <&gpio4 16 GPIO_ACTIVE_HIGH>;
+            interrupt-parent = <&gpio4>;
+            interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
+            vdd-supply = <&reg_3v3_per>;
+            vddp-supply = <&reg_5v0>;
+            vddhpp-supply = <&reg_6v4>;
+            i2c-bus = <&i2c2>;
+            slot-number = <1>;
+        };
+    };

Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml

@@ -75,6 +75,7 @@ required:
 
 allOf:
   - $ref: /schemas/i2c/i2c-controller.yaml#
+  - $ref: /schemas/soc/qcom/qcom,se-common-props.yaml#
   - if:
       properties:
         compatible:

Documentation/devicetree/bindings/misc/lwn,bk4-spi.yaml

@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/misc/lwn,bk4-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Liebherr's BK4 external SPI controller
+
+maintainers:
+  - Lukasz Majewski <lukma@denx.de>
+
+description: |
+  Liebherr's BK4 external SPI controller is a device which handles data
+  acquisition from compatible industrial peripherals.
+  The SPI is used for data and management purposes in both master and
+  slave modes.
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    const: lwn,bk4-spi
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 30000000
+
+  fsl,spi-cs-sck-delay: true
+
+  fsl,spi-sck-cs-delay: true
+
+required:
+  - compatible
+  - spi-max-frequency
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        spidev@0 {
+            compatible = "lwn,bk4-spi";
+            reg = <0>;
+            spi-max-frequency = <30000000>;
+            fsl,spi-cs-sck-delay = <200>;
+            fsl,spi-sck-cs-delay = <400>;
+        };
+    };

Documentation/devicetree/bindings/misc/lwn-bk4.txt

@@ -12,6 +12,7 @@ maintainers:
 
 allOf:
   - $ref: /schemas/serial/serial.yaml#
+  - $ref: /schemas/soc/qcom/qcom,se-common-props.yaml#
 
 properties:
   compatible:

Documentation/devicetree/bindings/serial/qcom,serial-geni-qcom.yaml

@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/qcom/qcom,se-common-props.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: QUP Peripheral-specific properties for I2C, SPI and SERIAL bus
+
+description:
+  The Generic Interface (GENI) based Qualcomm Universal Peripheral (QUP) is
+  a programmable module that supports a wide range of serial interfaces
+  such as UART, SPI, I2C, I3C, etc. This defines the common properties used
+  across QUP-supported peripherals.
+
+maintainers:
+  - Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>
+  - Viken Dadhaniya <viken.dadhaniya@oss.qualcomm.com>
+
+properties:
+  qcom,enable-gsi-dma:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      Configure the Serial Engine (SE) to transfer data in QCOM GPI DMA mode.
+      By default, FIFO mode (PIO/CPU DMA) will be selected.
+
+additionalProperties: true

Documentation/devicetree/bindings/soc/qcom/qcom,se-common-props.yaml

@@ -41,6 +41,26 @@ properties:
       - const: s_axi_aclk
       - const: spi_clk
 
+  trigger-sources:
+    description:
+      An array of trigger source phandles for offload instances. The index in
+      the array corresponds to the offload instance number.
+    minItems: 1
+    maxItems: 32
+
+  dmas:
+    description:
+      DMA channels connected to the input or output stream interface of an
+      offload instance.
+    minItems: 1
+    maxItems: 32
+
+  dma-names:
+    items:
+      pattern: "^offload(?:[12]?[0-9]|3[01])-[tr]x$"
+    minItems: 1
+    maxItems: 32
+
 required:
   - compatible
   - reg
@@ -59,6 +79,10 @@ examples:
         clocks = <&clkc 15>, <&clkc 15>;
         clock-names = "s_axi_aclk", "spi_clk";
 
+        trigger-sources = <&trigger_clock>;
+        dmas = <&dma 0>;
+        dma-names = "offload0-rx";
+
         #address-cells = <1>;
         #size-cells = <0>;
 

Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml

@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2025 Amlogic, Inc. All rights reserved
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/amlogic,a4-spifc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SPI flash controller for Amlogic ARM SoCs
+
+maintainers:
+  - Liang Yang <liang.yang@amlogic.com>
+  - Feng Chen <feng.chen@amlogic.com>
+  - Xianwei Zhao <xianwei.zhao@amlogic.com>
+
+description:
+  The Amlogic SPI flash controller is an extended version of the Amlogic NAND
+  flash controller. It supports SPI Nor Flash and SPI NAND Flash(where the Host
+  ECC HW engine could be enabled).
+
+allOf:
+  - $ref: /schemas/spi/spi-controller.yaml#
+
+properties:
+  compatible:
+    const: amlogic,a4-spifc
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: clock apb gate
+      - description: clock used for the controller
+
+  clock-names:
+    items:
+      - const: gate
+      - const: core
+
+  interrupts:
+    maxItems: 1
+
+  amlogic,rx-adj:
+    description:
+      Number of clock cycles by which sampling is delayed.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2, 3]
+    default: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    sfc0: spi@fe08d000 {
+      compatible = "amlogic,a4-spifc";
+      reg = <0xfe08d000 0x800>;
+      clocks = <&clkc_periphs 31>,
+               <&clkc_periphs 102>;
+      clock-names = "gate", "core";
+
+      pinctrl-0 = <&spiflash_default>;
+      pinctrl-names = "default";
+
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      flash@0 {
+          compatible = "spi-nand";
+          reg = <0>;
+          #address-cells = <1>;
+          #size-cells = <1>;
+          nand-ecc-engine = <&sfc0>;
+          nand-ecc-strength = <8>;
+          nand-ecc-step-size = <512>;
+      };
+    };