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From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Hugo Villeneuve <hugo@hugovil.com>
Cc: gregkh@linuxfoundation.org, jirislaby@kernel.org,
	peterz@infradead.org,  mingo@kernel.org,
	linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
	 andy.shevchenko@gmail.com,
	Hugo Villeneuve <hvilleneuve@dimonoff.com>
Subject: Re: [PATCH v4 3/5] serial: sc16is7xx: split into core and I2C/SPI parts (core)
Date: Tue, 23 Apr 2024 12:01:23 +0200	[thread overview]
Message-ID: <CAMuHMdVq=rf-6o485KiA+zcwJPHMe5STKUtSWtFPs2nmvshu-A@mail.gmail.com> (raw)
In-Reply-To: <20240409154253.3043822-4-hugo@hugovil.com>

Hi Hugo,

On Tue, Apr 9, 2024 at 5:48 PM Hugo Villeneuve <hugo@hugovil.com> wrote:
> From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
>
> Split the common code from sc16is7xx driver and move the I2C and SPI bus
> parts into interface-specific source files.
>
> sc16is7xx becomes the core functions which can support multiple bus
> interfaces like I2C and SPI.
>
> No functional changes intended.
>
> Also simplify and improve Kconfig entries.
>   - Capitalize SPI keyword for consistency
>   - Display list of supported ICs each on a separate line (and aligned) to
>     facilitate locating a specific IC model
>   - Add Manufacturer name at start of description string
>   - Add UART keyword to description string
>
> Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>

Thanks for your patch, which is now commit d49216438139bca0
("serial: sc16is7xx: split into core and I2C/SPI parts (core)")
in tty-next (next-20240415 and later).

> --- a/drivers/tty/serial/Kconfig
> +++ b/drivers/tty/serial/Kconfig
> @@ -1021,41 +1021,30 @@ config SERIAL_SCCNXP_CONSOLE
>           Support for console on SCCNXP serial ports.
>
>  config SERIAL_SC16IS7XX_CORE
> -       tristate
> -
> -config SERIAL_SC16IS7XX
> -       tristate "SC16IS7xx serial support"
> +       tristate "NXP SC16IS7xx UART support"

Hence this replaces SERIAL_SC16IS7XX_CORE by SERIAL_SC16IS7XX,
so arch/mips/configs/cu1??0-neo_defconfig needs to updated.

>         select SERIAL_CORE
> -       depends on (SPI_MASTER && !I2C) || I2C
> +       select SERIAL_SC16IS7XX_SPI if SPI_MASTER
> +       select SERIAL_SC16IS7XX_I2C if I2C

So if SPI_MASTER or I2C is enabled, the corresponding SERIAL_SC16IS7XX_*
subdriver can no longer be disabled?  According to
https://lore.kernel.org/all/20240403123501.8ef5c99f65a40ca2c10f635a@hugovil.com/
you did want to support that?

>         help
> -         This selects support for SC16IS7xx serial ports.
> -         Supported ICs are SC16IS740, SC16IS741, SC16IS750, SC16IS752,
> -         SC16IS760 and SC16IS762. Select supported buses using options below.
> +         Core driver for NXP SC16IS7xx UARTs.
> +         Supported ICs are:
> +
> +           SC16IS740
> +           SC16IS741
> +           SC16IS750
> +           SC16IS752
> +           SC16IS760
> +           SC16IS762
> +
> +         The driver supports both I2C and SPI interfaces.
>
>  config SERIAL_SC16IS7XX_I2C
> -       bool "SC16IS7xx for I2C interface"
> -       depends on SERIAL_SC16IS7XX
> -       depends on I2C
> -       select SERIAL_SC16IS7XX_CORE if SERIAL_SC16IS7XX
> -       select REGMAP_I2C if I2C
> -       default y
> -       help
> -         Enable SC16IS7xx driver on I2C bus,
> -         If required say y, and say n to i2c if not required,
> -         Enabled by default to support oldconfig.
> -         You must select at least one bus for the driver to be built.
> +       tristate
> +       select REGMAP_I2C
>
>  config SERIAL_SC16IS7XX_SPI
> -       bool "SC16IS7xx for spi interface"
> -       depends on SERIAL_SC16IS7XX
> -       depends on SPI_MASTER
> -       select SERIAL_SC16IS7XX_CORE if SERIAL_SC16IS7XX
> -       select REGMAP_SPI if SPI_MASTER
> -       help
> -         Enable SC16IS7xx driver on SPI bus,
> -         If required say y, and say n to spi if not required,
> -         This is additional support to existing driver.
> -         You must select at least one bus for the driver to be built.
> +       tristate
> +       select REGMAP_SPI
>
>  config SERIAL_TIMBERDALE
>         tristate "Support for timberdale UART"

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

  reply	other threads:[~2024-04-23 10:01 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-09 15:42 [PATCH v4 0/5] serial: sc16is7xx: split into core and I2C/SPI parts Hugo Villeneuve
2024-04-09 15:42 ` [PATCH v4 1/5] serial: sc16is7xx: add proper sched.h include for sched_set_fifo() Hugo Villeneuve
2024-04-09 15:42 ` [PATCH v4 2/5] serial: sc16is7xx: unconditionally clear line bit in sc16is7xx_remove() Hugo Villeneuve
2024-04-09 15:42 ` [PATCH v4 3/5] serial: sc16is7xx: split into core and I2C/SPI parts (core) Hugo Villeneuve
2024-04-23 10:01   ` Geert Uytterhoeven [this message]
2024-04-23 10:02     ` Geert Uytterhoeven
2024-04-23 10:37       ` Andy Shevchenko
2024-04-23 13:15         ` Hugo Villeneuve
2024-04-23 10:36     ` Andy Shevchenko
2024-04-23 13:11       ` Geert Uytterhoeven
2024-04-23 15:34         ` Hugo Villeneuve
2024-05-23  7:33         ` Geert Uytterhoeven
2024-05-23 23:56           ` Hugo Villeneuve
2024-05-24  7:47             ` Geert Uytterhoeven
2024-04-23 13:14     ` Hugo Villeneuve
2024-04-30 13:03       ` Hugo Villeneuve
2024-04-09 15:42 ` [PATCH v4 4/5] serial: sc16is7xx: split into core and I2C/SPI parts (sc16is7xx_lines) Hugo Villeneuve
2024-04-09 15:42 ` [PATCH v4 5/5] serial: sc16is7xx: split into core and I2C/SPI parts (sc16is7xx_regcfg) Hugo Villeneuve

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