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[79.36.0.44]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-afe89bd7acesm555423866b.73.2025.08.27.02.56.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Aug 2025 02:56:06 -0700 (PDT) From: Andrea della Porta X-Google-Original-From: Andrea della Porta Date: Wed, 27 Aug 2025 11:58:00 +0200 To: Rob Herring Cc: Andrea della Porta , linus.walleij@linaro.org, krzk+dt@kernel.org, conor+dt@kernel.org, florian.fainelli@broadcom.com, wahrenst@gmx.net, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Catalin Marinas , Will Deacon , iivanov@suse.de, svarbanov@suse.de, mbrugger@suse.com, Jonathan Bell , Phil Elwell Subject: Re: [PATCH v3 1/3] dt-bindings: pinctrl: Add support for Broadcom STB pin controller Message-ID: References: <6fdbaf2bd0b72badbb5384e43b97bebcda4cc2f0.1754922935.git.andrea.porta@suse.com> <20250818172040.GA1483013-robh@kernel.org> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250818172040.GA1483013-robh@kernel.org> Hi Rob, On 12:20 Mon 18 Aug , Rob Herring wrote: > On Mon, Aug 11, 2025 at 04:46:51PM +0200, Andrea della Porta wrote: > > From: "Ivan T. Ivanov" > > > > The STB pin controller represents a family whose silicon instances > > are found e.g. on BCM2712 SoC. > > > > In particular, on RaspberryPi 5, there are two separate instantiations > > of the same IP block which differ in the number of pins that are > > associated and the pinmux functions for each of those pins. The > > -aon- variant stands for 'Always On'. > > > > Depending on the revision of the BCM2712 (CO or D0), the pin > > controller instance has slight differences in the register layout. > > > > Signed-off-by: Ivan T. Ivanov > > Signed-off-by: Andrea della Porta > > --- > > .../pinctrl/brcm,bcm2712c0-pinctrl.yaml | 135 ++++++++++++++++++ > > 1 file changed, 135 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,bcm2712c0-pinctrl.yaml > > > > diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,bcm2712c0-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/brcm,bcm2712c0-pinctrl.yaml > > new file mode 100644 > > index 000000000000..28d66336aa2e > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/pinctrl/brcm,bcm2712c0-pinctrl.yaml > > @@ -0,0 +1,135 @@ > > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause > > +%YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/pinctrl/brcm,bcm2712c0-pinctrl.yaml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: Broadcom STB family pin controller > > + > > +maintainers: > > + - Ivan T. Ivanov > > + - A. della Porta > > Why is your first name abbrievated here? The heuristic inside get_maintainer.pl does not correctly recognize names like "Andrea della Porta", reporting something like: della Porta and missing both the first name and the double quotes surrounding the name/surname pair. Something like "Andrea d. Porta" would be reported correctly but it's not an option in my case since 'della' is not a middle name that can abbreviated, it's just integral part of the surname. The easy workaround I've found (the hard one being fixing get_maintainer.pl script, of course, but I'm not a Perl guru) is to just let the name be abbreviated. > > > + > > +description: > > + Broadcom's STB family of memory-mapped pin controllers. > > + This includes the pin controllers inside the BCM2712 SoC which > > + are instances of the STB family and has two silicon variants, > > + C0 and D0, which differs slightly in terms of registers layout. > > + The -aon- (Always On) variant is the same IP block but differs > > + in the number of pins that are associated and the pinmux functions > > + for each of those pins. > > Wrap lines at 80. If there are paragraphs, then blank line in between > and use the '>' modifier. I'm not seeing any lines exceeding 80 chars here. Ack for the blank lines between paragraphs plus >. > > > + > > +allOf: > > + - $ref: pinctrl.yaml# > > + > > +properties: > > + compatible: > > + enum: > > + - brcm,bcm2712c0-pinctrl > > + - brcm,bcm2712c0-aon-pinctrl > > + - brcm,bcm2712d0-pinctrl > > + - brcm,bcm2712d0-aon-pinctrl > > + > > + reg: > > + maxItems: 1 > > + > > +patternProperties: > > + '-state$': > > + oneOf: > > + - $ref: '#/$defs/brcmstb-pinctrl-state' > > + - patternProperties: > > + '-pins$': > > + $ref: '#/$defs/brcmstb-pinctrl-state' > > + additionalProperties: false > > + > > +$defs: > > + brcmstb-pinctrl-state: > > + allOf: > > + - $ref: pincfg-node.yaml# > > + - $ref: pinmux-node.yaml# > > + > > + description: > > + Pin controller client devices use pin configuration subnodes (children > > + and grandchildren) for desired pin configuration. > > + Client device subnodes use below standard properties. > > Paragraphs here? Ack. > > > + > > + properties: > > + pins: > > + description: > > + List of gpio pins affected by the properties specified in this > > + subnode (either this or "groups" must be specified). > > + items: > > + pattern: '^((aon_)?s?gpio[0-6]?[0-9])|(emmc_(clk|cmd|dat[0-7]|ds))$' > > + > > + function: > > + enum: [ gpio, alt1, alt2, alt3, alt4, alt5, alt6, alt7, alt8, > > + aon_cpu_standbyb, aon_fp_4sec_resetb, aon_gpclk, aon_pwm, > > + arm_jtag, aud_fs_clk0, avs_pmu_bsc, bsc_m0, bsc_m1, bsc_m2, > > + bsc_m3, clk_observe, ctl_hdmi_5v, enet0, enet0_mii, enet0_rgmii, > > + ext_sc_clk, fl0, fl1, gpclk0, gpclk1, gpclk2, hdmi_tx0_auto_i2c, > > + hdmi_tx0_bsc, hdmi_tx1_auto_i2c, hdmi_tx1_bsc, i2s_in, i2s_out, > > + ir_in, mtsif, mtsif_alt, mtsif_alt1, pdm, pkt, pm_led_out, sc0, > > + sd0, sd2, sd_card_a, sd_card_b, sd_card_c, sd_card_d, sd_card_e, > > + sd_card_f, sd_card_g, spdif_out, spi_m, spi_s, sr_edm_sense, te0, > > + te1, tsio, uart0, uart1, uart2, usb_pwr, usb_vbus, uui, vc_i2c0, > > + vc_i2c3, vc_i2c4, vc_i2c5, vc_i2csl, vc_pcm, vc_pwm0, vc_pwm1, > > + vc_spi0, vc_spi3, vc_spi4, vc_spi5, vc_uart0, vc_uart2, vc_uart3, > > + vc_uart4 ] > > + > > + description: > > + Specify the alternative function to be configured for the specified > > + pins. > > Be consistent with putting 'description' first or last. Ack. Many thanks, Andrea > > > + > > + bias-disable: true > > + bias-pull-down: true > > + bias-pull-up: true > > + > > + required: > > + - pins > > + > > + if: > > + properties: > > + pins: > > + not: > > + contains: > > + pattern: "^emmc_(clk|cmd|dat[0-7]|ds)$" > > + then: > > + required: > > + - function > > + else: > > + properties: > > + function: false > > + > > + additionalProperties: false > > + > > +required: > > + - compatible > > + - reg > > + > > +unevaluatedProperties: false > > + > > +examples: > > + - | > > + brcm_pinctrl: pinctrl@7d504100 { > > + compatible = "brcm,bcm2712c0-pinctrl"; > > + reg = <0x7d504100 0x30>; > > + > > + bt-shutdown-default-state { > > + function = "gpio"; > > + pins = "gpio29"; > > + }; > > + > > + uarta-default-state { > > + rts-tx-pins { > > + function = "uart0"; > > + pins = "gpio24", "gpio26"; > > + bias-disable; > > + }; > > + > > + cts-rx-pins { > > + function = "uart0"; > > + pins = "gpio25", "gpio27"; > > + bias-pull-up; > > + }; > > + }; > > + }; > > -- > > 2.35.3 > >