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Subject: Re: [PATCH v3 7/7] arm64: dts: exynos: Add Exynos850 SoC support
To:     Sam Protsenko <semen.protsenko@linaro.org>
Cc:     Sylwester Nawrocki <s.nawrocki@samsung.com>,
        =?UTF-8?Q?Pawe=c5=82_Chmiel?= <pawel.mikolaj.chmiel@gmail.com>,
        Chanwoo Choi <cw00.choi@samsung.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Tomasz Figa <tomasz.figa@gmail.com>,
        Marc Zyngier <maz@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Stephen Boyd <sboyd@kernel.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Jiri Slaby <jirislaby@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Charles Keepax <ckeepax@opensource.wolfsonmicro.com>,
        Ryu Euiyoul <ryu.real@samsung.com>,
        Tom Gall <tom.gall@linaro.org>,
        Sumit Semwal <sumit.semwal@linaro.org>,
        John Stultz <john.stultz@linaro.org>,
        Amit Pundir <amit.pundir@linaro.org>,
        devicetree <devicetree@vger.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Samsung SOC <linux-samsung-soc@vger.kernel.org>,
        "open list:SERIAL DRIVERS" <linux-serial@vger.kernel.org>
References: <20210811114827.27322-1-semen.protsenko@linaro.org>
 <20210811114827.27322-8-semen.protsenko@linaro.org>
 <f0e892ce-acd0-7acc-4881-dd67dda6fb38@canonical.com>
 <CAPLW+4=2msw44EjujeTUvcYJ701iZTPwkVoO3UzZyakspev20A@mail.gmail.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Message-ID: <40dd9a0a-eccc-1b0c-70ec-06edc8b91177@canonical.com>
Date:   Mon, 16 Aug 2021 11:45:24 +0200
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On 12/08/2021 19:42, Sam Protsenko wrote:
> On Thu, 12 Aug 2021 at 11:17, Krzysztof Kozlowski
> <krzysztof.kozlowski@canonical.com> wrote:
>>
>> On 11/08/2021 13:48, Sam Protsenko wrote:
>>> Samsung Exynos850 is ARMv8-based mobile-oriented SoC.
>>>
>>> This patch adds minimal SoC support by including next Device Tree nodes:
>>>
>>> 1. Octa cores (Cortex-A55), supporting PSCI v1.0
>>> 2. ARM architecture timer (armv8-timer)
>>> 3. Interrupt controller (GIC-400)
>>> 4. Pinctrl nodes for GPIO
>>> 5. Serial node
>>>
>>> Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
>>> ---
>>> Changes in v3:
>>>  - Used generic fixed clock for serial
>>>
>>> Changes in v2:
>>>  * Commit message:
>>>    - Documented added dts features instead of CPU features
>>>
>>>  * exynos850-usi.dtsi:
>>>    - Removed, moved everything to exynos850.dtsi
>>>
>>>  * exynos850.dtsi:
>>>    - Root node:
>>>      - Added comment about engineering name (Exynos3830)
>>>      - Renamed pinctrl nodes, adding domain names
>>>      - Used hard coded IRQ numbers instead of named constants everywhere
>>>      - Added soc node, moved next nodes there: gic, clock, pinctrls and
>>>        serial
>>>      - Used address-cells=1 for soc node and removed unneeded 0x0 from
>>>        reg properties
>>>      - Moved exynos850-pinctrl.dtsi include line to the end of
>>>        exynos850.dtsi
>>>      - Coding style fixes
>>>    - cpus:
>>>      - Used address-cells=1 for cpus node
>>>      - Renamed cpu@0001 to cpu@1, and so on
>>>      - Left only "arm,cortex-a55" for cpus compatible
>>>      - Renamed reg = <0x0001> to <0x1> for cpus
>>>    - armv8 timer:
>>>      - Add comment about missing HV timer IRQ to armv8 timer node
>>>      - Removed not existing properties from armv8 timer node
>>>      - Fixed cpu number in CPU_MASK()
>>>      - Removed obsolete clock-frequency property
>>>    - GIC:
>>>      - Fixed GIC type to be GIC-400
>>>      - Fixed size of GIC's 2nd region to be 0x2000
>>>    - serial node:
>>>      - Hard coded clock number for serial_0 for now; will replace with
>>>        named const once proper clock driver is implemented
>>>      - Removed gate_uart_clk0 clock from serial_0, as that clock is not
>>>        supported in serial driver anyway (yet)
>>>    - clock node:
>>>      - Fixed clock controller node name (@0x12.. -> @12..)
>>>
>>>  * exynos850-pinctrl.dtsi:
>>>    - Referenced pinctrl nodes instead of defining those again in root node
>>>    - Fixed interrupt-cells (3 -> 2)
>>>    - Fixed USI related comments for pin config nodes
>>>    - Removed decon_f_te_* and fm_lna_en nodes (won't be used)
>>>    - Reordered pin config nodes by pin numbers
>>>    - Improved all comments
>>>    - Used existing named constants for pin-function and pin-pud
>>>    - Fixed node names (used hyphens instead of underscore)
>>>    - Fixed warnings found in W=1 build
>>>
>>>  .../boot/dts/exynos/exynos850-pinctrl.dtsi    | 748 ++++++++++++++++++
>>>  arch/arm64/boot/dts/exynos/exynos850.dtsi     | 261 ++++++
>>>  2 files changed, 1009 insertions(+)
>>>  create mode 100644 arch/arm64/boot/dts/exynos/exynos850-pinctrl.dtsi
>>>  create mode 100644 arch/arm64/boot/dts/exynos/exynos850.dtsi
>>>
>>> diff --git a/arch/arm64/boot/dts/exynos/exynos850-pinctrl.dtsi b/arch/arm64/boot/dts/exynos/exynos850-pinctrl.dtsi
>>> new file mode 100644
>>> index 000000000000..ba5d5f33e2f6
>>> --- /dev/null
>>> +++ b/arch/arm64/boot/dts/exynos/exynos850-pinctrl.dtsi
>>> @@ -0,0 +1,748 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +/*
>>> + * Samsung's Exynos850 SoC pin-mux and pin-config device tree source
>>> + *
>>> + * Copyright (C) 2017 Samsung Electronics Co., Ltd.
>>> + * Copyright (C) 2021 Linaro Ltd.
>>> + *
>>> + * Samsung's Exynos850 SoC pin-mux and pin-config options are listed as device
>>> + * tree nodes in this file.
>>> + */
>>> +
>>> +#include <dt-bindings/interrupt-controller/arm-gic.h>
>>> +#include <dt-bindings/pinctrl/samsung.h>
>>> +
>>> +&pinctrl_alive {
>>> +     gpa0: gpa0 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     gpa1: gpa1 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     gpa2: gpa2 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     gpa3: gpa3 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     gpa4: gpa4 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>,
>>> +                          <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     gpq0: gpq0 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +     };
>>> +
>>> +     /* I2C5 (also called CAM_PMIC_I2C in TRM) */
>>> +     i2c5_bus: i2c5-bus {
>>> +             samsung,pins = "gpa3-5", "gpa3-6";
>>> +             samsung,pin-function = <EXYNOS_PIN_FUNC_3>;
>>> +             samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
>>> +             samsung,pin-drv = <0>;
>>> +     };
>>> +
>>> +     /* I2C6 (also called MOTOR_I2C in TRM) */
>>> +     i2c6_bus: i2c6-bus {
>>> +             samsung,pins = "gpa3-7", "gpa4-0";
>>> +             samsung,pin-function = <EXYNOS_PIN_FUNC_3>;
>>> +             samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
>>> +             samsung,pin-drv = <0>;
>>> +     };
>>> +
>>> +     /* USI: UART */
>>> +     uart0_bus: uart0-bus {
>>> +             samsung,pins = "gpq0-0", "gpq0-1";
>>> +             samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
>>> +             samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
>>> +     };
>>> +};
>>> +
>>> +&pinctrl_cmgp {
>>> +     gpm0: gpm0 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     gpm1: gpm1 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     gpm2: gpm2 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     gpm3: gpm3 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     gpm4: gpm4 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     gpm5: gpm5 {
>>> +             gpio-controller;
>>> +             #gpio-cells = <2>;
>>> +
>>> +             interrupt-controller;
>>> +             #interrupt-cells = <2>;
>>> +             interrupt-parent = <&gic>;
>>> +             interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
>>> +     };
>>> +
>>> +     /* USI_CMGP0: HSI2C function */
>>> +     hsi2c3_bus: hsi2c3-bus {
>>> +             samsung,pins = "gpm0-0", "gpm1-0";
>>> +             samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
>>> +             samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
>>> +             samsung,pin-drv = <0>;
>>
>> There are also macros for DRV.
>>
> 
> Unfortunately, existing DRV macros won't work for Exynos850. DRV
> constants have different meaning for different GPIO domains in
> Exynos850, so I thought introducing several groups of DRV constants
> might be confusing. But please let me know if you still want me do
> that.
> 

Oh, damn, raw values are ok then.


Best regards,
Krzysztof