ASoC: nau8822: add support for supply regulators

Alexey Charkov <alchark@flipper.net> says:

The Nuvoton NAU8822 codec has four power supply pins: VDDA, VDDB, VDDC
and VDDSPK, which must be online and stable before the device can be
accessed over I2C. On boards where these rails are software-controlled,
probing the codec before the regulators are up results in -ENXIO errors
during register access.

This short series adds optional regulator support to both the device
tree binding and the driver, so platforms that need explicit power
sequencing can describe and enforce it:

Link: https://patch.msgid.link/20260525-nau8822-reg-v2-0-7d37ae393e46@flipper.net

Author: broonie

.mailmap

@@ -263,8 +263,9 @@ Enric Balletbo i Serra <eballetbo@kernel.org> <enric.balletbo@collabora.com>
 Enric Balletbo i Serra <eballetbo@kernel.org> <eballetbo@iseebcn.com>
 Erik Kaneda <erik.kaneda@intel.com> <erik.schmauss@intel.com>
 Ethan Carter Edwards <ethan@ethancedwards.com> Ethan Edwards <ethancarteredwards@gmail.com>
-Eugen Hristev <eugen.hristev@linaro.org> <eugen.hristev@microchip.com>
-Eugen Hristev <eugen.hristev@linaro.org> <eugen.hristev@collabora.com>
+Eugen Hristev <ehristev@kernel.org> <eugen.hristev@microchip.com>
+Eugen Hristev <ehristev@kernel.org> <eugen.hristev@linaro.org>
+Eugen Hristev <ehristev@kernel.org> <eugen.hristev@collabora.com>
 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
 Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> <ezequiel@collabora.com>
 Faith Ekstrand <faith.ekstrand@collabora.com> <jason@jlekstrand.net>
@@ -339,6 +340,7 @@ Henrik Rydberg <rydberg@bitmath.org>
 Herbert Xu <herbert@gondor.apana.org.au>
 Huacai Chen <chenhuacai@kernel.org> <chenhc@lemote.com>
 Huacai Chen <chenhuacai@kernel.org> <chenhuacai@loongson.cn>
+Ian Ray <ian.ray@gehealthcare.com> <ian.ray@ge.com>
 Ignat Korchagin <ignat@linux.win> <ignat@cloudflare.com>
 Igor Korotin <igor.korotin@linux.dev> <igor.korotin.linux@gmail.com>
 Ike Panhc <ikepanhc@gmail.com> <ike.pan@canonical.com>

Documentation/admin-guide/kernel-parameters.txt

@@ -789,24 +789,6 @@ Kernel parameters
 	cio_ignore=	[S390]
 			See Documentation/arch/s390/common_io.rst for details.
 
-	clearcpuid=X[,X...] [X86]
-			Disable CPUID feature X for the kernel. See
-			arch/x86/include/asm/cpufeatures.h for the valid bit
-			numbers X. Note the Linux-specific bits are not necessarily
-			stable over kernel options, but the vendor-specific
-			ones should be.
-			X can also be a string as appearing in the flags: line
-			in /proc/cpuinfo which does not have the above
-			instability issue. However, not all features have names
-			in /proc/cpuinfo.
-			Note that using this option will taint your kernel.
-			Also note that user programs calling CPUID directly
-			or using the feature without checking anything
-			will still see it. This just prevents it from
-			being used by the kernel or shown in /proc/cpuinfo.
-			Also note the kernel might malfunction if you disable
-			some critical bits.
-
 	clk_ignore_unused
 			[CLK]
 			Prevents the clock framework from automatically gating

Documentation/arch/x86/cpuinfo.rst

@@ -187,6 +187,10 @@ to disable features using the feature number as defined in
 Protection can be disabled using clearcpuid=514. The number 514 is calculated
 from #define X86_FEATURE_UMIP (16*32 + 2).
 
+DO NOT USE this cmdline option in production - it is meant to be used only as
+a quick'n'dirty debugging aid to rule out a feature-enabling code is the
+culprit. If you use it, it'll taint the kernel.
+
 In addition, there exists a variety of custom command-line parameters that
 disable specific features. The list of parameters includes, but is not limited
 to, nofsgsbase, nosgx, noxsave, etc. 5-level paging can also be disabled using

Documentation/devicetree/bindings/sound/nuvoton,nau8822.yaml

@@ -30,6 +30,20 @@ properties:
   clock-names:
     const: mclk
 
+  vdda-supply:
+    description: Analog power supply
+
+  vddb-supply:
+    description: Digital buffer (input/output) supply
+
+  vddc-supply:
+    description: Digital core supply
+
+  vddspk-supply:
+    description:
+      Speaker supply (power supply pin for RSPKOUT, LSPKOUT, AUXOUT2 and
+      AUXTOUT1 output drivers)
+
   nuvoton,spk-btl:
     description:
       If set, configure the two loudspeaker outputs as a Bridge Tied Load output
@@ -54,5 +68,9 @@ examples:
         codec@1a {
             compatible = "nuvoton,nau8822";
             reg = <0x1a>;
+            vdda-supply = <&vcca_3v3_s0>;
+            vddb-supply = <&vcca_3v3_s0>;
+            vddc-supply = <&vcca_3v3_s0>;
+            vddspk-supply = <&vcca_3v3_s0>;
         };
     };

Documentation/devicetree/bindings/spi/qcom,spi-qpic-snand.yaml

@@ -25,6 +25,7 @@ properties:
       - items:
           - enum:
               - qcom,ipq5018-snand
+              - qcom,ipq5210-snand
               - qcom,ipq5332-snand
               - qcom,ipq5424-snand
           - const: qcom,ipq9574-snand

Documentation/devicetree/bindings/usb/eswin,eic7700-usb.yaml

@@ -41,12 +41,13 @@ properties:
       - const: usb_en
 
   resets:
-    maxItems: 2
+    maxItems: 3
 
   reset-names:
     items:
       - const: vaux
       - const: usb_rst
+      - const: usb_phy
 
   eswin,hsp-sp-csr:
     description:
@@ -85,8 +86,8 @@ examples:
         interrupt-parent = <&plic>;
         interrupts = <85>;
         interrupt-names = "peripheral";
-        resets = <&reset 84>, <&hspcrg 2>;
-        reset-names = "vaux", "usb_rst";
+        resets = <&reset 84>, <&hspcrg 2>, <&hspcrg 4>;
+        reset-names = "vaux", "usb_rst", "usb_phy";
         dr_mode = "peripheral";
         maximum-speed = "high-speed";
         phy_type = "utmi";

Documentation/devicetree/bindings/usb/ti,omap4-musb.yaml

@@ -81,9 +81,7 @@ properties:
     const: usb2-phy
 
   usb-phy:
-    $ref: /schemas/types.yaml#/definitions/phandle-array
-    description: Phandle for the PHY device.
-    deprecated: true
+    maxItems: 1
 
   ctrl-module:
     $ref: /schemas/types.yaml#/definitions/phandle
@@ -96,6 +94,9 @@ required:
   - interrupts
   - interrupt-names
 
+allOf:
+  - $ref: usb-hcd.yaml#
+
 unevaluatedProperties: false
 
 examples:

Documentation/netlink/specs/handshake.yaml

@@ -12,6 +12,12 @@ protocol: genetlink
 doc: Netlink protocol to request a transport layer security handshake.
 
 definitions:
+  -
+    type: const
+    name: max-errno
+    value: 4095
+    header: linux/err.h
+    scope: kernel
   -
     type: enum
     name: handler-class
@@ -80,6 +86,8 @@ attribute-sets:
       -
         name: status
         type: u32
+        checks:
+          max: max-errno
       -
         name: sockfd
         type: s32

MAINTAINERS

@@ -1150,8 +1150,9 @@ F:	Documentation/arch/x86/amd-hfi.rst
 F:	drivers/platform/x86/amd/hfi/
 
 AMD IOMMU (AMD-VI)
-M:	Joerg Roedel <joro@8bytes.org>
+M:	Joerg Roedel (AMD) <joro@8bytes.org>
 R:	Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
+R:	Vasant Hegde <vasant.hegde@amd.com>
 L:	iommu@lists.linux.dev
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux.git
@@ -10835,7 +10836,7 @@ F:	include/linux/generic-radix-tree.h
 F:	lib/generic-radix-tree.c
 
 GENERIC RESISTIVE TOUCHSCREEN ADC DRIVER
-M:	Eugen Hristev <eugen.hristev@microchip.com>
+M:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-input@vger.kernel.org
 S:	Maintained
 F:	drivers/input/touchscreen/resistive-adc-touch.c
@@ -13483,7 +13484,7 @@ F:	include/linux/iommu-dma.h
 F:	include/linux/iova.h
 
 IOMMU SUBSYSTEM
-M:	Joerg Roedel <joro@8bytes.org>
+M:	Joerg Roedel (AMD) <joro@8bytes.org>
 M:	Will Deacon <will@kernel.org>
 R:	Robin Murphy <robin.murphy@arm.com>
 L:	iommu@lists.linux.dev
@@ -16506,7 +16507,7 @@ F:	drivers/usb/mtu3/
 
 MEGACHIPS STDPXXXX-GE-B850V3-FW LVDS/DP++ BRIDGES
 M:	Peter Senna Tschudin <peter.senna@gmail.com>
-M:	Ian Ray <ian.ray@ge.com>
+M:	Ian Ray <ian.ray@gehealthcare.com>
 M:	Martyn Welch <martyn.welch@collabora.co.uk>
 S:	Maintained
 F:	Documentation/devicetree/bindings/display/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt
@@ -17345,7 +17346,7 @@ F:	Documentation/devicetree/bindings/sound/mikroe,mikroe-proto.txt
 F:	sound/soc/atmel
 
 MICROCHIP CSI2DC DRIVER
-M:	Eugen Hristev <eugen.hristev@microchip.com>
+M:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-media@vger.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/media/microchip,csi2dc.yaml
@@ -17372,7 +17373,7 @@ F:	drivers/i2c/busses/i2c-at91-*.c
 F:	drivers/i2c/busses/i2c-at91.h
 
 MICROCHIP ISC DRIVER
-M:	Eugen Hristev <eugen.hristev@microchip.com>
+M:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-media@vger.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/media/atmel,isc.yaml
@@ -17384,7 +17385,7 @@ F:	drivers/staging/media/deprecated/atmel/atmel-sama*-isc*
 F:	include/linux/atmel-isc-media.h
 
 MICROCHIP ISI DRIVER
-M:	Eugen Hristev <eugen.hristev@microchip.com>
+M:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-media@vger.kernel.org
 S:	Supported
 F:	drivers/media/platform/atmel/atmel-isi.c
@@ -17574,7 +17575,7 @@ F:	Documentation/devicetree/bindings/display/bridge/microchip,sam9x75-lvds.yaml
 F:	drivers/gpu/drm/bridge/microchip-lvds.c
 
 MICROCHIP SAMA5D2-COMPATIBLE ADC DRIVER
-M:	Eugen Hristev <eugen.hristev@microchip.com>
+M:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-iio@vger.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/iio/adc/atmel,sama5d2-adc.yaml
@@ -24124,7 +24125,7 @@ F:	drivers/mmc/host/sdhci*
 
 SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) MICROCHIP DRIVER
 M:	Aubin Constans <aubin.constans@microchip.com>
-R:	Eugen Hristev <eugen.hristev@collabora.com>
+R:	Eugen Hristev <ehristev@kernel.org>
 L:	linux-mmc@vger.kernel.org
 S:	Supported
 F:	drivers/mmc/host/sdhci-of-at91.c

Makefile

@@ -2,7 +2,7 @@
 VERSION = 7
 PATCHLEVEL = 1
 SUBLEVEL = 0
-EXTRAVERSION = -rc5
+EXTRAVERSION = -rc6
 NAME = Baby Opossum Posse
 
 # *DOCUMENTATION*