RE: [PATCH 6/7] arm64: dts: exynos: Add initial Exynos850 SoC support

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Hi,

> -----Original Message-----
> From: Sam Protsenko <semen.protsenko@xxxxxxxxxx>
> Sent: Thursday, December 16, 2021 1:09 AM
> To: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>; Rob Herring
> <robh+dt@xxxxxxxxxx>; Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> Cc: Jaewon Kim <jaewon02.kim@xxxxxxxxxxx>; Chanho Park
> <chanho61.park@xxxxxxxxxxx>; David Virag <virag.david003@xxxxxxxxx>;
> Youngmin Nam <youngmin.nam@xxxxxxxxxxx>; Tomasz Figa
> <tomasz.figa@xxxxxxxxx>; Chanwoo Choi <cw00.choi@xxxxxxxxxxx>; Michael
> Turquette <mturquette@xxxxxxxxxxxx>; Stephen Boyd <sboyd@xxxxxxxxxx>;
> Linus Walleij <linus.walleij@xxxxxxxxxx>; Daniel Palmer <daniel@xxxxxxxx>;
> Hao Fang <fanghao11@xxxxxxxxxx>; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx;
> linux-samsung-soc@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux-
> kernel@xxxxxxxxxxxxxxx; linux-clk@xxxxxxxxxxxxxxx
> Subject: [PATCH 6/7] arm64: dts: exynos: Add initial Exynos850 SoC support
> 
> Samsung Exynos850 is ARMv8-based mobile-oriented SoC. This patch adds
> initial SoC support. It's not comprehensive yet, some more devices will be
> added later. Right now only crucial system components and most needed
> platform devices are defined.
> 
> Crucial features (needed to boot Linux up to shell with serial console):
> 
>   * Octa cores (Cortex-A55), supporting PSCI v1.0
>   * ARM architected timer (armv8-timer)
>   * Interrupt controller (GIC-400)
>   * Pinctrl nodes for GPIO
>   * Serial node
> 
> Basic platform features:
> 
>   * Clock controller CMUs
>   * OSCCLK clock
>   * RTC clock
>   * MCT timer
>   * ARM PMU (Performance Monitor Unit)
>   * Chip-id
>   * RTC
>   * Reset
>   * Watchdog timers
>   * eMMC
>   * I2C
>   * HSI2C
>   * USI
> 
> All those features were already enabled and tested on E850-96 board with
> minimal BusyBox rootfs.
> 
> Signed-off-by: Sam Protsenko <semen.protsenko@xxxxxxxxxx>
> ---
>  .../boot/dts/exynos/exynos850-pinctrl.dtsi    | 755 ++++++++++++++++++
>  arch/arm64/boot/dts/exynos/exynos850.dtsi     | 755 ++++++++++++++++++
>  2 files changed, 1510 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..ba4e8d3129ac
> --- /dev/null
> +++ b/arch/arm64/boot/dts/exynos/exynos850-pinctrl.dtsi
> @@ -0,0 +1,755 @@
> +// 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_pins: i2c5-pins {
> +		samsung,pins = "gpa3-5", "gpa3-6";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_3>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
> +		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
> +	};
> +
> +	/* I2C6 (also called MOTOR_I2C in TRM) */
> +	i2c6_pins: i2c6-pins {
> +		samsung,pins = "gpa3-7", "gpa4-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_3>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
> +		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
> +	};
> +
> +	/* USI: UART_DEBUG_0 pins */
> +	uart0_pins: uart0-pins {
> +		samsung,pins = "gpq0-0", "gpq0-1";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +	};
> +
> +	/* USI: UART_DEBUG_1 pins */
> +	uart1_pins: uart1-pins {
> +		samsung,pins = "gpa3-7", "gpa4-0";
> +		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_pins: hsi2c3-pins {
> +		samsung,pins = "gpm0-0", "gpm1-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
> +		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
> +	};
> +
> +	/* USI_CMGP0: UART function (4 pins, Auto Flow Control) */
> +	uart1_single_pins: uart1-single-pins {
> +		samsung,pins = "gpm0-0", "gpm1-0", "gpm2-0", "gpm3-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +	};
> +
> +	/* USI_CMGP0: UART function (2 pins, Non-Auto Flow Control) */
> +	uart1_dual_pins: uart1-dual-pins {
> +		samsung,pins = "gpm0-0", "gpm1-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +	};
> +
> +	/* USI_CMGP0: SPI function */
> +	spi1_pins: spi1-pins {
> +		samsung,pins = "gpm0-0", "gpm1-0", "gpm2-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
> +	};
> +
> +	spi1_cs_pins: spi1-cs-pins {
> +		samsung,pins = "gpm3-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
> +	};
> +
> +	spi1_cs_func_pins: spi1-cs-func-pins {
> +		samsung,pins = "gpm3-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
> +	};
> +
> +	/* USI_CMGP1: HSI2C function */
> +	hsi2c4_pins: hsi2c4-pins {
> +		samsung,pins = "gpm4-0", "gpm5-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
> +		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
> +	};
> +
> +	/* USI_CMGP1: UART function (4 pins, Auto Flow Control) */
> +	uart2_single_pins: uart2-single-pins {
> +		samsung,pins = "gpm4-0", "gpm5-0", "gpm6-0", "gpm7-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +	};
> +
> +	/* USI_CMGP1: UART function (2 pins, Non-Auto Flow Control) */
> +	uart2_dual_pins: uart2-dual-pins {
> +		samsung,pins = "gpm4-0", "gpm5-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +	};
> +
> +	/* USI_CMGP1: SPI function */
> +	spi2_pins: spi2-pins {
> +		samsung,pins = "gpm4-0", "gpm5-0", "gpm6-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
> +	};
> +
> +	spi2_cs_pins: spi2-cs-pins {
> +		samsung,pins = "gpm7-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
> +	};
> +
> +	spi2_cs_func_pins: spi2-cs-func-pins {
> +		samsung,pins = "gpm7-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
> +	};
> +};
> +
> +&pinctrl_aud {
> +	gpb0: gpb0 {
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +
> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +	};
> +
> +	gpb1: gpb1 {
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +
> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +	};
> +
> +	aud_codec_mclk_pins: aud-codec-mclk-pins {
> +		samsung,pins = "gpb0-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
> +	};
> +
> +	aud_codec_mclk_idle_pins: aud-codec-mclk-idle-pins {
> +		samsung,pins = "gpb0-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
> +	};
> +
> +	aud_i2s0_pins: aud-i2s0-pins {
> +		samsung,pins = "gpb0-1", "gpb0-2", "gpb0-3", "gpb0-4";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
> +	};
> +
> +	aud_i2s0_idle_pins: aud-i2s0-idle-pins {
> +		samsung,pins = "gpb0-1", "gpb0-2", "gpb0-3", "gpb0-4";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
> +	};
> +
> +	aud_i2s1_pins: aud-i2s1-pins {
> +		samsung,pins = "gpb1-0", "gpb1-1", "gpb1-2", "gpb1-3";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
> +	};
> +
> +	aud_i2s1_idle_pins: aud-i2s1-idle-pins {
> +		samsung,pins = "gpb1-0", "gpb1-1", "gpb1-2", "gpb1-3";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
> +	};
> +
> +	aud_fm_pins: aud-fm-pins {
> +		samsung,pins = "gpb1-4";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
> +	};
> +
> +	aud_fm_idle_pins: aud-fm-idle-pins {
> +		samsung,pins = "gpb1-4";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
> +	};
> +};
> +
> +&pinctrl_hsi {
> +	gpf2: gpf2 {
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +
> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +	};
> +
> +	sd2_clk_pins: sd2-clk-pins {
> +		samsung,pins = "gpf2-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS850_HSI_PIN_DRV_LV2>;
> +	};
> +
> +	sd2_clk_fast_slew_rate_1x_pins: sd2-clk-fast-slew-rate-1x-pins {
> +		samsung,pins = "gpf2-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS850_HSI_PIN_DRV_LV1>;
> +	};
> +
> +	sd2_clk_fast_slew_rate_1_5x_pins: sd2-clk-fast-slew-rate-1-5x-pins
> {
> +		samsung,pins = "gpf2-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS850_HSI_PIN_DRV_LV1_5>;
> +	};
> +
> +	sd2_clk_fast_slew_rate_2x_pins: sd2-clk-fast-slew-rate-2x-pins {
> +		samsung,pins = "gpf2-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS850_HSI_PIN_DRV_LV2>;
> +	};
> +
> +	sd2_clk_fast_slew_rate_2_5x_pins: sd2-clk-fast-slew-rate-2-5x-pins
> {
> +		samsung,pins = "gpf2-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS850_HSI_PIN_DRV_LV2_5>;
> +	};
> +
> +	sd2_clk_fast_slew_rate_3x_pins: sd2-clk-fast-slew-rate-3x-pins {
> +		samsung,pins = "gpf2-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS850_HSI_PIN_DRV_LV3>;
> +	};
> +
> +	sd2_clk_fast_slew_rate_4x_pins: sd2-clk-fast-slew-rate-4x-pins {
> +		samsung,pins = "gpf2-0";
> +		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
> +		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
> +		samsung,pin-drv = <EXYNOS850_HSI_PIN_DRV_LV4>;
> +	};

All the flew_rate_XX pins are necessary to be defined? They might be
required by board dts files and it's convenient to use them but I don't
think they should be pre-defined. We can override the sd2_clk_pins like
below in a board dts file.

&sd2_clk_pins {
	samsung,pin-drv = <EXYNOS850_HSI_PIN_DRV_LV4>;

Otherwise, looks good to me.

Reviewed-by: Chanho Park <chanho61.park@xxxxxxxxxxx>

Best Regards,
Chanho Park




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