Re: [PATCH v4 2/2] hw/arm: Add minimal support for the B-L475E-IOT01A board

[Philippe Mathieu-Daudé]

On 21/12/23 22:32, Inès Varhol wrote:
> This commit adds a new B-L475E-IOT01A board using the STM32L475VG SoC
> as well as a dedicated documentation file.
> The implementation is derived from the Netduino Plus 2 machine.
> There are no peripherals implemented yet, only memory regions.
>
> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

(please drop newline)

> Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr>
> Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
> ---
>   MAINTAINERS                             |  7 +++
>   configs/devices/arm-softmmu/default.mak |  1 +
>   docs/system/arm/b-l475e-iot01a.rst      | 46 ++++++++++++++++
>   docs/system/arm/stm32.rst               |  6 ++-
>   docs/system/target-arm.rst              |  1 +
>   hw/arm/Kconfig                          |  6 +++
>   hw/arm/b-l475e-iot01a.c                 | 70 +++++++++++++++++++++++++
>   hw/arm/meson.build                      |  1 +
>   8 files changed, 136 insertions(+), 2 deletions(-)
>   create mode 100644 docs/system/arm/b-l475e-iot01a.rst
>   create mode 100644 hw/arm/b-l475e-iot01a.c


> diff --git a/hw/arm/b-l475e-iot01a.c b/hw/arm/b-l475e-iot01a.c
> new file mode 100644
> index 0000000000..c3790e3dc8
> --- /dev/null
> +++ b/hw/arm/b-l475e-iot01a.c
> @@ -0,0 +1,70 @@
> +/*
> + * B-L475E-IOT01A Discovery Kit machine
> + * (B-L475E-IOT01A IoT Node)
> + *
> + * Copyright (c) 2023 Arnaud Minier <arnaud.minier@telecom-paris.fr>
> + * Copyright (c) 2023 Inès Varhol <ines.varhol@telecom-paris.fr>
> + *
> + * SPDX-License-Identifier: GPL-2.0-or-later
> + *
> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
> + * See the COPYING file in the top-level directory.
> + *
> + * This work is heavily inspired by the netduinoplus2 by Alistair Francis.
> + * Original code is licensed under the MIT License:
> + *
> + * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
> + */
> +
> +/*
> + * The reference used is the STMicroElectronics UM2153 User manual
> + * Discovery kit for IoT node, multi-channel communication with STM32L4.
> + * https://www.st.com/en/evaluation-tools/b-l475e-iot01a.html#documentation
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qapi/error.h"
> +#include "hw/boards.h"
> +#include "hw/qdev-properties.h"
> +#include "hw/qdev-clock.h"
> +#include "qemu/error-report.h"
> +#include "hw/arm/stm32l4x5_soc.h"
> +#include "hw/arm/boot.h"
> +
> +/* Main SYSCLK frequency in Hz (80MHz) */
> +#define SYSCLK_FRQ 80000000ULL

Alternative self-documenting name: MAIN_SYSCLK_FREQ_HZ

> +static void b_l475e_iot01a_machine_init(MachineClass *mc)
> +{
> +    static const char *machine_valid_cpu_types[] = {
> +        ARM_CPU_TYPE_NAME("cortex-m4"),
> +        NULL};

Per our coding style, the trailing '}' goes on a newline.

> +    mc->desc = "B-L475E-IOT01A Discovery Kit (Cortex-M4)";
> +    mc->init = b_l475e_iot01a_init;
> +    mc->valid_cpu_types = machine_valid_cpu_types;
> +
> +    /* SRAM pre-allocated as part of the SoC instantiation */
> +    mc->default_ram_size = 0;
> +}

Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>