[PATCH 05/17] serial: serial_pl01x: Implement .getinfo() for PL01

[Moritz Fischer]

On Sat, Jul 27, 2024 at 12:21 AM Patrick Rudolph
<patrick.rudolph at 9elements.com> wrote:
>
> From: Maximilian Brune <maximilian.brune at 9elements.com>
>
> When ACPI is enabled on arm it will use the getinfo function to fill
> the SPCR ACPI table.
>
> Signed-off-by: Maximilian Brune <maximilian.brune at 9elements.com>
> Cc: Simon Glass <sjg at chromium.org>
> Cc: Tom Rini <trini at konsulko.com>

Reviewed-by: Moritz Fischer <moritzf at google.com>
> ---
>  boot/bootflow.c               |  8 ++++++--
>  drivers/serial/serial_pl01x.c | 24 ++++++++++++++++++++++++
>  include/serial.h              |  1 +
>  3 files changed, 31 insertions(+), 2 deletions(-)
>
> diff --git a/boot/bootflow.c b/boot/bootflow.c
> index 59d77d2385..d8807eb109 100644
> --- a/boot/bootflow.c
> +++ b/boot/bootflow.c
> @@ -936,11 +936,15 @@ int bootflow_cmdline_auto(struct bootflow *bflow, const char *arg)
>                 return ret;
>
>         *buf = '\0';
> -       if (!strcmp("earlycon", arg)) {
> +       if (!strcmp("earlycon", arg) && info.type == SERIAL_CHIP_16550_COMPATIBLE) {
>                 snprintf(buf, sizeof(buf),
>                          "uart8250,mmio32,%#lx,%dn8", info.addr,
>                          info.baudrate);
> -       } else if (!strcmp("console", arg)) {
> +       } else if (!strcmp("earlycon", arg) && info.type == SERIAL_CHIP_PL01X) {
> +               snprintf(buf, sizeof(buf),
> +                        "pl011,mmio32,%#lx,%dn8", info.addr,
> +                        info.baudrate);
> +       } else if (!strcmp("console", arg) && info.type == SERIAL_CHIP_16550_COMPATIBLE) {
>                 snprintf(buf, sizeof(buf),
>                          "ttyS0,%dn8", info.baudrate);
>         }
> diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c
> index 80c35963b8..ab67922d18 100644
> --- a/drivers/serial/serial_pl01x.c
> +++ b/drivers/serial/serial_pl01x.c
> @@ -19,6 +19,7 @@
>  #include <watchdog.h>
>  #include <asm/io.h>
>  #include <serial.h>
> +#include <spl.h>
>  #include <dm/device_compat.h>
>  #include <dm/platform_data/serial_pl01x.h>
>  #include <linux/compiler.h>
> @@ -272,6 +273,28 @@ __weak struct serial_device *default_serial_console(void)
>         return &pl01x_serial_drv;
>  }
>  #else
> +
> +static int pl01x_serial_getinfo(struct udevice *dev,
> +                               struct serial_device_info *info)
> +{
> +       struct pl01x_serial_plat *plat = dev_get_plat(dev);
> +
> +       /* save code size */
> +       if (!spl_in_proper())
> +               return -ENOSYS;
> +
> +       info->type = SERIAL_CHIP_PL01X;
> +       info->addr_space = SERIAL_ADDRESS_SPACE_MEMORY;
> +       info->addr = plat->base;
> +       info->size = 0x1000;
> +       info->reg_width = 4;
> +       info->reg_shift = 2;
> +       info->reg_offset = 0;
> +       info->clock = plat->clock;
> +
> +       return 0;
> +}
> +
>  int pl01x_serial_setbrg(struct udevice *dev, int baudrate)
>  {
>         struct pl01x_serial_plat *plat = dev_get_plat(dev);
> @@ -341,6 +364,7 @@ static const struct dm_serial_ops pl01x_serial_ops = {
>         .pending = pl01x_serial_pending,
>         .getc = pl01x_serial_getc,
>         .setbrg = pl01x_serial_setbrg,
> +       .getinfo = pl01x_serial_getinfo,
>  };
>
>  #if CONFIG_IS_ENABLED(OF_REAL)
> diff --git a/include/serial.h b/include/serial.h
> index d129dc3253..d7a9a8cfb8 100644
> --- a/include/serial.h
> +++ b/include/serial.h
> @@ -124,6 +124,7 @@ enum serial_stop {
>  enum serial_chip_type {
>         SERIAL_CHIP_UNKNOWN = -1,
>         SERIAL_CHIP_16550_COMPATIBLE,
> +       SERIAL_CHIP_PL01X,
>  };
>
>  enum adr_space_type {
> --
> 2.45.2
>