linux-kernel - Re: [PATCH v1 2/2] spi: add support for Meson A1 SPI Flash Controller

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Message-ID: <e3f5751a-9a24-3902-cf31-e621b4cb21ab@linaro.org>
Date:   Wed, 22 Mar 2023 17:00:21 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Martin Kurbanov <mmkurbanov@...rdevices.ru>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...rdevices.ru
Subject: Re: [PATCH v1 2/2] spi: add support for Meson A1 SPI Flash Controller

Hi,

On 22/03/2023 16:04, Martin Kurbanov wrote:
> This is a driver for the Amlogic Meson SPI flash controller support
> on A113L SoC.
> 
> Signed-off-by: Martin Kurbanov <mmkurbanov@...rdevices.ru>
> ---
>   drivers/spi/Kconfig              |   7 +
>   drivers/spi/Makefile             |   1 +
>   drivers/spi/spi-meson-spifc-a1.c | 444 +++++++++++++++++++++++++++++++
>   3 files changed, 452 insertions(+)
>   create mode 100644 drivers/spi/spi-meson-spifc-a1.c
> 
> diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
> index 3b1c0878bb85..a12452bd1e0c 100644
> --- a/drivers/spi/Kconfig
> +++ b/drivers/spi/Kconfig
> @@ -582,6 +582,13 @@ config SPI_MESON_SPIFC
>   	  This enables master mode support for the SPIFC (SPI flash
>   	  controller) available in Amlogic Meson SoCs.
>   
> +config SPI_MESON_SPIFC_A1
> +	tristate "Amlogic Meson A113L SPIFC controller"

The title should be "Amlogic Meson A1 SPIFC controller" for coherency.

> +	depends on ARCH_MESON || COMPILE_TEST
> +	help
> +	  This enables master mode support for the SPIFC (SPI flash
> +	  controller) available in Amlogic Meson A113L (A1 family) SoC.

You should write the reverse: available in Amlogic Meson A1 Family (A113L SoC).

> +
>   config SPI_MICROCHIP_CORE
>   	tristate "Microchip FPGA SPI controllers"
>   	depends on SPI_MASTER
> diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
> index be9ba40ef8d0..702053970967 100644
> --- a/drivers/spi/Makefile
> +++ b/drivers/spi/Makefile
> @@ -72,6 +72,7 @@ obj-$(CONFIG_SPI_LM70_LLP)		+= spi-lm70llp.o
>   obj-$(CONFIG_SPI_LP8841_RTC)		+= spi-lp8841-rtc.o
>   obj-$(CONFIG_SPI_MESON_SPICC)		+= spi-meson-spicc.o
>   obj-$(CONFIG_SPI_MESON_SPIFC)		+= spi-meson-spifc.o
> +obj-$(CONFIG_SPI_MESON_SPIFC_A1)	+= spi-meson-spifc-a1.o
>   obj-$(CONFIG_SPI_MICROCHIP_CORE)	+= spi-microchip-core.o
>   obj-$(CONFIG_SPI_MICROCHIP_CORE_QSPI)	+= spi-microchip-core-qspi.o
>   obj-$(CONFIG_SPI_MPC512x_PSC)		+= spi-mpc512x-psc.o
> diff --git a/drivers/spi/spi-meson-spifc-a1.c b/drivers/spi/spi-meson-spifc-a1.c
> new file mode 100644
> index 000000000000..213c8b692675
> --- /dev/null
> +++ b/drivers/spi/spi-meson-spifc-a1.c
> @@ -0,0 +1,444 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for Amlogic Meson A113L SPI flash controller (SPIFC)

Same here

> + *
> + * Copyright (c) 2023, SberDevices. All Rights Reserved.
> + *
> + * Author: Martin Kurbanov <mmkurbanov@...rdevices.ru>
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/device.h>
> +#include <linux/io.h>
> +#include <linux/iopoll.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/spi/spi.h>
> +#include <linux/spi/spi-mem.h>
> +#include <linux/types.h>
> +
> +#define A1_SPIFC_AHB_CTRL_REG		0x0
> +#define A1_SPIFC_AHB_BUS_EN		BIT(31)

I find the "A1_SPIFC" hard to read, I think you should reverse
it in all the file into :
#define SPIFC_A1_...
and
static XXX meson_spifc_a1_request to be coherent with the legacy spifc
driver and spicc driver.


<snip>

> +
> +MODULE_AUTHOR("Martin Kurbanov <mmkurbanov@...rdevices.ru>");
> +MODULE_DESCRIPTION("Amlogic Meson A113L SPIFC driver");

Same here "Meson A1 SPIFC driver"

> +MODULE_LICENSE("GPL");

Thanks,
Neil