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Date: Mon, 16 Aug 2021 11:45:24 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To: Sam Protsenko <semen.protsenko@...aro.org>
Cc: Sylwester Nawrocki <s.nawrocki@...sung.com>,
Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>,
Chanwoo Choi <cw00.choi@...sung.com>,
Linus Walleij <linus.walleij@...aro.org>,
Tomasz Figa <tomasz.figa@...il.com>,
Marc Zyngier <maz@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Stephen Boyd <sboyd@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Jiri Slaby <jirislaby@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>,
Ryu Euiyoul <ryu.real@...sung.com>,
Tom Gall <tom.gall@...aro.org>,
Sumit Semwal <sumit.semwal@...aro.org>,
John Stultz <john.stultz@...aro.org>,
Amit Pundir <amit.pundir@...aro.org>,
devicetree <devicetree@...r.kernel.org>,
linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
"open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Samsung SOC <linux-samsung-soc@...r.kernel.org>,
"open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>
Subject: Re: [PATCH v3 7/7] arm64: dts: exynos: Add Exynos850 SoC support
On 12/08/2021 19:42, Sam Protsenko wrote:
> On Thu, 12 Aug 2021 at 11:17, Krzysztof Kozlowski
> <krzysztof.kozlowski@...onical.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@...aro.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@...1 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
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