Merge branch 'i2c/for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:

 - mostly driver updates. Bigger ones for mlxcpld and iproc. But most of
   them are all over the place.

 - removal of the efm32, sirf, u300, and zte zx bus drivers because of
   platform removal. So, we have a pleasant diffstat this time.

 - first set of cleanups in the I2C core as preparation to increase
   maximum length of SMBus transfers to 255 (as specified in the new
   standard). Better documentation of struct i2c_msg and its flags stand
   out here.

 - the testunit can now respond to SMBus block process calls which is
   the testcase when implementing the above new maximum length.

* 'i2c/for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (62 commits)
  i2c: remove redundant error print in stm32f7_i2c_probe
  i2c: testunit: add support for block process calls
  i2c: busses: Replace spin_lock_irqsave with spin_lock in hard IRQ
  dt-bindings: eeprom: at24: Document ROHM BR24G01
  i2c: i801: Add support for Intel Alder Lake PCH-P
  i2c: mv64xxx: Fix check for missing clock after adding RPM
  i2c: mux: mlxcpld: Add callback to notify mux creation completion
  i2c: mux: mlxcpld: Extend supported mux number
  i2c: mux: mlxcpld: Extend driver to support word address space devices
  i2c: mux: mlxcpld: Get rid of adapter numbers enforcement
  i2c: mux: mlxcpld: Prepare mux selection infrastructure for two-byte support
  i2c: mux: mlxcpld: Convert driver to platform driver
  i2c: imx: Synthesize end of transaction events without idle interrupts
  i2c: i2c-qcom-geni: Add shutdown callback for i2c
  i2c: mv64xxx: Add runtime PM support
  i2c: amd-mp2: Remove unused macro
  i2c: amd-mp2: convert to PCI logging functions
  i2c: mux: mlxcpld: Move header file out of x86 realm
  platform/x86: mlxcpld: Update module license
  i2c: mux: mlxcpld: Update module license
  ...

7 files changed, 35 insertions, 75 deletions

diff --git a/Documentation/devicetree/bindings/eeprom/at24.yaml b/Documentation/devicetree/bindings/eeprom/at24.yaml
index d5117c638b75..021d8ae42da3 100644
--- a/Documentation/devicetree/bindings/eeprom/at24.yaml
+++ b/Documentation/devicetree/bindings/eeprom/at24.yaml
@@ -96,9 +96,6 @@ properties:
       # These are special cases that don't conform to the above pattern.
       # Each requires a standard at24 model as fallback.
       - items:
-          - const: rohm,br24t01
-          - const: atmel,24c01
-      - items:
           - const: nxp,se97b
           - const: atmel,24c02
       - items:
@@ -113,6 +110,12 @@ properties:
       - items:
           - const: renesas,r1ex24128
           - const: atmel,24c128
+      - items:
+          - const: rohm,br24g01
+          - const: atmel,24c01
+      - items:
+          - const: rohm,br24t01
+          - const: atmel,24c01
 
   label:
     description: Descriptive name of the EEPROM.
diff --git a/Documentation/devicetree/bindings/i2c/i2c-sirf.txt b/Documentation/devicetree/bindings/i2c/i2c-sirf.txt
deleted file mode 100644
index 2701eefb00f7..000000000000
--- a/Documentation/devicetree/bindings/i2c/i2c-sirf.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-I2C for SiRFprimaII platforms
-
-Required properties :
-- compatible : Must be "sirf,prima2-i2c"
-- reg: physical base address of the controller and length of memory mapped
-     region.
-- interrupts: interrupt number to the cpu.
-
-Optional properties:
-- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
-  The absence of the property indicates the default frequency 100 kHz.
-
-Examples :
-
-i2c0: i2c@b00e0000 {
-    compatible = "sirf,prima2-i2c";
-    reg = <0xb00e0000 0x10000>;
-    interrupts = <24>;
-};
diff --git a/Documentation/devicetree/bindings/i2c/i2c-stu300.txt b/Documentation/devicetree/bindings/i2c/i2c-stu300.txt
deleted file mode 100644
index bd81a482634f..000000000000
--- a/Documentation/devicetree/bindings/i2c/i2c-stu300.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-ST Microelectronics DDC I2C
-
-Required properties :
-- compatible : Must be "st,ddci2c"
-- reg: physical base address of the controller and length of memory mapped
-     region.
-- interrupts: interrupt number to the cpu.
-- #address-cells = <1>;
-- #size-cells = <0>;
-
-Optional properties:
-- Child nodes conforming to i2c bus binding
-
-Examples :
-
diff --git a/Documentation/devicetree/bindings/i2c/i2c-zx2967.txt b/Documentation/devicetree/bindings/i2c/i2c-zx2967.txt
deleted file mode 100644
index cb806d1ae4c9..000000000000
--- a/Documentation/devicetree/bindings/i2c/i2c-zx2967.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-ZTE zx2967 I2C controller
-
-Required properties:
- - compatible: must be "zte,zx296718-i2c"
- - reg: physical address and length of the device registers
- - interrupts: a single interrupt specifier
- - clocks: clock for the device
- - #address-cells: should be <1>
- - #size-cells: should be <0>
- - clock-frequency: the desired I2C bus clock frequency.
-
-Examples:
-
-	i2c@112000 {
-		compatible = "zte,zx296718-i2c";
-		reg = <0x00112000 0x1000>;
-		interrupts = <GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&osc24m>;
-		#address-cells = <1>
-		#size-cells = <0>;
-		clock-frequency = <1600000>;
-	};
diff --git a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
index 5b5ae402f97a..eb72dd571def 100644
--- a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
@@ -18,21 +18,14 @@ properties:
           - const: allwinner,sun4i-a10-i2c
       - const: allwinner,sun6i-a31-i2c
       - items:
-          - const: allwinner,sun8i-a23-i2c
+          - enum:
+              - allwinner,sun8i-a23-i2c
+              - allwinner,sun8i-a83t-i2c
+              - allwinner,sun50i-a64-i2c
+              - allwinner,sun50i-a100-i2c
+              - allwinner,sun50i-h6-i2c
+              - allwinner,sun50i-h616-i2c
           - const: allwinner,sun6i-a31-i2c
-      - items:
-          - const: allwinner,sun8i-a83t-i2c
-          - const: allwinner,sun6i-a31-i2c
-      - items:
-          - const: allwinner,sun50i-a64-i2c
-          - const: allwinner,sun6i-a31-i2c
-      - items:
-          - const: allwinner,sun50i-a100-i2c
-          - const: allwinner,sun6i-a31-i2c
-      - items:
-          - const: allwinner,sun50i-h6-i2c
-          - const: allwinner,sun6i-a31-i2c
-
       - const: marvell,mv64xxx-i2c
       - const: marvell,mv78230-i2c
       - const: marvell,mv78230-a0-i2c
diff --git a/Documentation/devicetree/bindings/i2c/renesas,i2c.txt b/Documentation/devicetree/bindings/i2c/renesas,i2c.txt
index 96d869ac3839..5762d2d1ab9c 100644
--- a/Documentation/devicetree/bindings/i2c/renesas,i2c.txt
+++ b/Documentation/devicetree/bindings/i2c/renesas,i2c.txt
@@ -26,6 +26,7 @@ Required properties:
 	"renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC.
 	"renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC.
 	"renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC.
+	"renesas,i2c-r8a779a0" if the device is a part of a R8A779A0 SoC.
 	"renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device.
 	"renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible
 				device.
diff --git a/Documentation/i2c/slave-testunit-backend.rst b/Documentation/i2c/slave-testunit-backend.rst
index 2c38e64f0bac..ecfc2abec32d 100644
--- a/Documentation/i2c/slave-testunit-backend.rst
+++ b/Documentation/i2c/slave-testunit-backend.rst
@@ -22,8 +22,9 @@ Instantiating the device is regular. Example for bus 0, address 0x30:
 
 After that, you will have a write-only device listening. Reads will just return
 an 8-bit version number of the testunit. When writing, the device consists of 4
-8-bit registers and all must be written to start a testcase, i.e. you must
-always write 4 bytes to the device. The registers are:
+8-bit registers and, except for some "partial" commands, all registers must be
+written to start a testcase, i.e. you usually write 4 bytes to the device. The
+registers are:
 
 0x00 CMD   - which test to trigger
 0x01 DATAL - configuration byte 1 for the test
@@ -67,3 +68,21 @@ status word is currently ignored in the Linux Kernel. Example to send a
 notification after 10ms:
 
 # i2cset -y 0 0x30 0x02 0x42 0x64 0x01 i
+
+0x03 SMBUS_BLOCK_PROC_CALL (partial command)
+   DATAL - must be '1', i.e. one further byte will be written
+   DATAH - number of bytes to be sent back
+   DELAY - not applicable, partial command!
+
+This test will respond to a block process call as defined by the SMBus
+specification. The one data byte written specifies how many bytes will be sent
+back in the following read transfer. Note that in this read transfer, the
+testunit will prefix the length of the bytes to follow. So, if your host bus
+driver emulates SMBus calls like the majority does, it needs to support the
+I2C_M_RECV_LEN flag of an i2c_msg. This is a good testcase for it. The returned
+data consists of the length first, and then of an array of bytes from length-1
+to 0. Here is an example which emulates i2c_smbus_block_process_call() using
+i2ctransfer (you need i2c-tools v4.2 or later):
+
+# i2ctransfer -y 0 w3@0x30 0x03 0x01 0x10 r?
+0x10 0x0f 0x0e 0x0d 0x0c 0x0b 0x0a 0x09 0x08 0x07 0x06 0x05 0x04 0x03 0x02 0x01 0x00