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Merge tag 'i3c/for-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux
Pull i3c updates from Alexandre Belloni: "New driver: - Renesas I3C controller Subsystem: - use adapter timeout value for I2C transfers - don't fail if GETHDRCAP is unsupported - replace ENOTSUPP with SUSV4-compliant EOPNOTSUPP Drivers: - svc: Fix npcm845 FIFO_EMPTY quirk" * tag 'i3c/for-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (25 commits) i3c: add missing include to internal header i3c: dw: Remove redundant pm_runtime_mark_last_busy() calls i3c: master: svc: Remove redundant pm_runtime_mark_last_busy() calls i3c: master: svc: Fix npcm845 FIFO_EMPTY quirk i3c: master: Add basic driver for the Renesas I3C controller dt-bindings: i3c: Add Renesas I3C controller i3c: Add more parameters for controllers to the header i3c: Standardize defines for specification parameters i3c: fix module_i3c_i2c_driver() with I3C=n i3c: master: cdns: Simplify handling clocks in probe() i3c: Fix i3c_device_do_priv_xfers() kernel-doc indentation i3c: master: dw: Use i3c_writel_fifo() and i3c_readl_fifo() i3c: master: cdns: Use i3c_writel_fifo() and i3c_readl_fifo() i3c: master: Add inline i3c_readl_fifo() and i3c_writel_fifo() i3c: prefix hexadecimal entries in sysfs i3c: master: cdns: replace ENOTSUPP with SUSV4-compliant EOPNOTSUPP i3c: dw: replace ENOTSUPP with SUSV4-compliant EOPNOTSUPP i3c: master: replace ENOTSUPP with SUSV4-compliant EOPNOTSUPP i3c: don't fail if GETHDRCAP is unsupported i3c: add patchwork entry to MAINTAINERS ...
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‎Documentation/devicetree/bindings/i3c/renesas,i3c.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/i3c/renesas,i3c.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Renesas RZ/G3S and RZ/G3E I3C Bus Interface
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maintainers:
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- Wolfram Sang <[email protected]>
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- Tommaso Merciai <[email protected]>
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properties:
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compatible:
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items:
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- enum:
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- renesas,r9a08g045-i3c # RZ/G3S
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- renesas,r9a09g047-i3c # RZ/G3E
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reg:
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maxItems: 1
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interrupts:
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items:
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- description: Non-recoverable internal error interrupt
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- description: Normal transfer error interrupt
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- description: Normal transfer abort interrupt
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- description: Normal response status buffer full interrupt
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- description: Normal command buffer empty interrupt
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- description: Normal IBI status buffer full interrupt
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- description: Normal Rx data buffer full interrupt
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- description: Normal Tx data buffer empty interrupt
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- description: Normal receive status buffer full interrupt
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- description: START condition detection interrupt
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- description: STOP condition detection interrupt
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- description: Transmit end interrupt
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- description: NACK detection interrupt
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- description: Arbitration lost interrupt
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- description: Timeout detection interrupt
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- description: Wake-up condition detection interrupt
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- description: HDR Exit Pattern detection interrupt
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minItems: 16
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interrupt-names:
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items:
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- const: ierr
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- const: terr
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- const: abort
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- const: resp
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- const: cmd
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- const: ibi
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- const: rx
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- const: tx
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- const: rcv
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- const: st
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- const: sp
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- const: tend
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- const: nack
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- const: al
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- const: tmo
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- const: wu
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- const: exit
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minItems: 16
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clocks:
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items:
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- description: APB bus clock
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- description: transfer clock
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- description: SFRs clock
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minItems: 2
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clock-names:
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items:
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- const: pclk
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- const: tclk
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- const: pclkrw
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minItems: 2
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power-domains:
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maxItems: 1
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resets:
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items:
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- description: Reset signal
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- description: APB interface reset signal/SCAN reset signal
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reset-names:
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items:
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- const: presetn
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- const: tresetn
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required:
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- compatible
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- reg
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- interrupts
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- interrupt-names
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- clock-names
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- clocks
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- power-domains
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- resets
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- reset-names
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allOf:
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- $ref: i3c.yaml#
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- if:
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properties:
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compatible:
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contains:
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const: renesas,r9a08g045-i3c
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then:
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properties:
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clocks:
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maxItems: 2
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clock-names:
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maxItems: 2
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interrupts:
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minItems: 17
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interrupt-names:
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minItems: 17
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- if:
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properties:
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compatible:
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contains:
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const: renesas,r9a09g047-i3c
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then:
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properties:
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clocks:
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minItems: 3
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clock-names:
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minItems: 3
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interrupts:
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maxItems: 16
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interrupt-names:
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maxItems: 16
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/r9a08g045-cpg.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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i3c@1005b000 {
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compatible = "renesas,r9a08g045-i3c";
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reg = <0x1005b000 0x1000>;
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clocks = <&cpg CPG_MOD R9A08G045_I3C_PCLK>,
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<&cpg CPG_MOD R9A08G045_I3C_TCLK>;
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clock-names = "pclk", "tclk";
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interrupts = <GIC_SPI 289 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 290 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 293 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 294 IRQ_TYPE_EDGE_RISING>,
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<GIC_SPI 295 IRQ_TYPE_EDGE_RISING>,
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<GIC_SPI 296 IRQ_TYPE_EDGE_RISING>,
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<GIC_SPI 297 IRQ_TYPE_EDGE_RISING>,
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<GIC_SPI 298 IRQ_TYPE_EDGE_RISING>,
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<GIC_SPI 299 IRQ_TYPE_EDGE_RISING>,
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<GIC_SPI 304 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 305 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 307 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 308 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 309 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 310 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 311 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 306 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "ierr", "terr", "abort", "resp",
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"cmd", "ibi", "rx", "tx", "rcv",
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"st", "sp", "tend", "nack",
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"al", "tmo", "wu", "exit";
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resets = <&cpg R9A08G045_I3C_PRESETN>,
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<&cpg R9A08G045_I3C_TRESETN>;
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reset-names = "presetn", "tresetn";
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power-domains = <&cpg>;
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#address-cells = <3>;
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#size-cells = <0>;
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};
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...

‎MAINTAINERS

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F: Documentation/devicetree/bindings/i3c/cdns,i3c-master.yaml
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F: drivers/i3c/master/i3c-master-cdns.c
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I3C DRIVER FOR RENESAS
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M: Wolfram Sang <[email protected]>
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M: Tommaso Merciai <[email protected]>
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S: Supported
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F: Documentation/devicetree/bindings/i3c/renesas,i3c.yaml
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F: drivers/i3c/master/renesas-i3c.c
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I3C DRIVER FOR SYNOPSYS DESIGNWARE
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S: Orphan
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F: Documentation/devicetree/bindings/i3c/snps,dw-i3c-master.yaml
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R: Frank Li <[email protected]>
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L: [email protected] (moderated for non-subscribers)
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S: Maintained
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Q: https://patchwork.kernel.org/project/linux-i3c/list/
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C: irc://chat.freenode.net/linux-i3c
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T: git git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux.git
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F: Documentation/ABI/testing/sysfs-bus-i3c

‎drivers/i3c/device.c

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*
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* This function can sleep and thus cannot be called in atomic context.
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*
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* Return: 0 in case of success, a negative error core otherwise.
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* -EAGAIN: controller lost address arbitration. Target
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* (IBI, HJ or controller role request) win the bus. Client
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* driver needs to resend the 'xfers' some time later.
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* See I3C spec ver 1.1.1 09-Jun-2021. Section: 5.1.2.2.3.
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* Return:
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* * 0 in case of success, a negative error core otherwise.
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* * -EAGAIN: controller lost address arbitration. Target (IBI, HJ or
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* controller role request) win the bus. Client driver needs to resend the
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* 'xfers' some time later. See I3C spec ver 1.1.1 09-Jun-2021. Section:
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* 5.1.2.2.3.
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*/
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int i3c_device_do_priv_xfers(struct i3c_device *dev,
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struct i3c_priv_xfer *xfers,

‎drivers/i3c/internals.h

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#define I3C_INTERNALS_H
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#include <linux/i3c/master.h>
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#include <linux/io.h>
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void i3c_bus_normaluse_lock(struct i3c_bus *bus);
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void i3c_bus_normaluse_unlock(struct i3c_bus *bus);
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int i3c_dev_request_ibi_locked(struct i3c_dev_desc *dev,
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const struct i3c_ibi_setup *req);
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void i3c_dev_free_ibi_locked(struct i3c_dev_desc *dev);
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/**
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* i3c_writel_fifo - Write data buffer to 32bit FIFO
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* @addr: FIFO Address to write to
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* @buf: Pointer to the data bytes to write
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* @nbytes: Number of bytes to write
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*/
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static inline void i3c_writel_fifo(void __iomem *addr, const void *buf,
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int nbytes)
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{
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writesl(addr, buf, nbytes / 4);
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if (nbytes & 3) {
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u32 tmp = 0;
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memcpy(&tmp, buf + (nbytes & ~3), nbytes & 3);
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writel(tmp, addr);
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}
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}
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/**
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* i3c_readl_fifo - Read data buffer from 32bit FIFO
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* @addr: FIFO Address to read from
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* @buf: Pointer to the buffer to store read bytes
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* @nbytes: Number of bytes to read
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*/
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static inline void i3c_readl_fifo(const void __iomem *addr, void *buf,
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int nbytes)
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{
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readsl(addr, buf, nbytes / 4);
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if (nbytes & 3) {
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u32 tmp;
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tmp = readl(addr);
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memcpy(buf + (nbytes & ~3), &tmp, nbytes & 3);
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}
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}
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#endif /* I3C_INTERNAL_H */

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