Hi Simon, Magnus, This patch series adds the R-Car System Controller to the DTS files for the various Renesas R-Car SoCs, and hooks up devices to their respective PM domains. This is a dependency for the enablement of DU and VSP on R-Car H3, as on this SoC the VSPs are located in a PM Domain. This series contains 2 parts: 1. Patches 1-6 add device node for the System Controllers, and hook up CPU cores and L2 caches/SCUs to their respective PM Domains, 2. Patches 7-12 hook up devices to the SYSC "always-on" PM Domain, for a more consistent device-power-area description in DT. While part 1 is safe to apply, part 2 causes more deferred probing, which exposes a few deficiencies in subsystems and drivers: 1. The PHY subsystem doesn't support deferred probe, so Micrel KSZ8041RNLI (R-Car Gen2) or KSZ9031 (R-Car Gen3) falls back to polling: irq: no irq domain found for /interrupt-controller@e61c0000 ! Micrel KSZ8041RNLI ee700000.etherne:01: attached PHY driver [Micrel KSZ8041RNLI] (mii_bus:phy_addr=ee700000.etherne:01, irq=-1) irq: no irq domain found for /soc/gpio@e6052000 ! Micrel KSZ9031 Gigabit PHY e6800000.etherne:00: attached PHY driver [Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=e6800000.etherne:00, irq=-1) 2. The Audio DMAC is now initialized after rcar_sound on R-Car Gen2 and Gen3, so rcar_sound falls back to PIO: rcar_sound ec500000.sound: can't get dma channel rcar_sound ec500000.sound: ssi[0] fallback to PIO mode rcar_sound ec500000.sound: can't get dma channel rcar_sound ec500000.sound: ssi[1] fallback to PIO mode 3. The System DMAC is now initialized after the SPI drivers on R-Car Gen2, hence they fall back to PIO: renesas_spi e6b10000.spi: dma_request_slave_channel_compat failed renesas_spi e6b10000.spi: DMA not available, using PIO spi_sh_msiof e6e20000.spi: dma_request_slave_channel_compat failed spi_sh_msiof e6e20000.spi: DMA not available, using PIO 4. On r8a7790/lager, I see various i2c failures: adv7180 6-0020: chip found @ 0x20 (e6520000.i2c) adv7180: probe of 6-0020 failed with error -110 i2c 7-0058: Masking da9063 interrupt sources i2c 7-0058: i2c error -110 da9063 7-0058: Cannot read FAULT_LOG. da9063 7-0058: Cannot clear fault log da9063 7-0058: Cannot read chip model id. da9063: probe of 7-0058 failed with error -5 i2c 7-0068: Masking da9210 interrupt sources i2c 7-0068: i2c error -110 da9210 7-0068: Failed to write to mask reg: -110 da9210: probe of 7-0068 failed with error -110 Hence for now I think it's best to just apply the first part, to allow progress on R-Car H3, and postpone the second part until the issues are sorted out. Changes compared to v3: - Add power-domains properties to the sysc nodes, to refer to the SoC's Clock Domains, - Extract using the SYSC "always-on" PM Domain on R-Car H3 into its own patch, - Add patches to use the SYSC "always-on" PM Domain on R-Car H1 and R-Car Gen2, - Update for recently added can0, can1, pciec0, and pciec1 device nodes on R-Car H3. Changes compared to v2: - Move power area hierarchy from DT to C (cfr. DT bindings for Renesas CPG/MSSR), and switch to "#power-domain-cells = <1>", - Drop fallback compatibility strings, as the bindings are SoC-specific, - Add an "always-on" power area on R-Car H3. Changes compared to v1: - Add R-Car H3 (r8a7795) support, - Use "renesas,<type>-sysc" instead of "renesas,sysc-<type>", - Add fallback compatibility strings for R-Car Gen2 and Gen3. Dependencies: - renesas-devel-20160406-v4.6-rc2, - "[PATCH v4 0/7] PM / Domains: Add DT bindings for the R-Car System Controller", - "[PATCH v4 00/11] soc: renesas: Add R-Car SYSC PM Domain Support". Note that these are hard dependencies: adding SYSC PM Domains to DTS files without driver support may cause breakage! For your convenience, I've pushed this, incl. all dependencies, to the topic/rcar-sysc-pd-v4 branch of https://git.kernel.org/cgit/linux/kernel/git/geert/renesas-drivers.git This has been tested on r8a7779/marzen, r8a7790/lager, r8a7791/koelsch, r8a7794/alt, and r8a7795/salvator-x. Thanks for applying part 1 (patches 1-6)! Geert Uytterhoeven (12): ARM: dts: r8a7779: Add SYSC PM Domains ARM: dts: r8a7790: Add SYSC PM Domains ARM: dts: r8a7791: Add SYSC PM Domains ARM: dts: r8a7793: Add SYSC PM Domains ARM: dts: r8a7794: Add SYSC PM Domains arm64: dts: r8a7795: Add SYSC PM Domains ARM: dts: r8a7779: Use SYSC "always-on" PM Domain ARM: dts: r8a7790: Use SYSC "always-on" PM Domain ARM: dts: r8a7791: Use SYSC "always-on" PM Domain ARM: dts: r8a7793: Use SYSC "always-on" PM Domain ARM: dts: r8a7794: Use SYSC "always-on" PM Domain arm64: dts: r8a7795: Use SYSC "always-on" PM Domain arch/arm/boot/dts/r8a7779.dtsi | 55 ++++++----- arch/arm/boot/dts/r8a7790.dtsi | 156 ++++++++++++++++-------------- arch/arm/boot/dts/r8a7791.dtsi | 157 +++++++++++++++++-------------- arch/arm/boot/dts/r8a7793.dtsi | 106 +++++++++++---------- arch/arm/boot/dts/r8a7794.dtsi | 117 ++++++++++++----------- arch/arm64/boot/dts/renesas/r8a7795.dtsi | 124 +++++++++++++----------- 6 files changed, 395 insertions(+), 320 deletions(-) -- 1.9.1 Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. 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