| Message ID | 20200915054825.3289105-1-hsinyi@chromium.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/2] tty: serial: print earlycon info after match->setup | expand |
On Tue, Sep 15, 2020 at 8:50 AM Hsin-Yi Wang <hsinyi@chromium.org> wrote: > > 8250 devices may modify iotype in their own earlycon setup. For example: > 8250_mtk and 8250_uniphier force iotype to be MMIO32. Print earlycon info > after match->setup to reflect actual earlycon info. Thanks for an update. I prefer to see some flag that tells user that options were forced by the kernel itself (something like err > 0 returned from ->setup()), but I think it's matter of an additional fix. In principle user can check the command line and / or DT/ACPI vs. dmesg, although it will require an extra work. > Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> > --- > Change: > v1->v2: rename function > --- > drivers/tty/serial/earlycon.c | 9 ++++++++- > 1 file changed, 8 insertions(+), 1 deletion(-) > > diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c > index 2ae9190b64bb9..b70877932d47d 100644 > --- a/drivers/tty/serial/earlycon.c > +++ b/drivers/tty/serial/earlycon.c > @@ -56,7 +56,6 @@ static void __init earlycon_init(struct earlycon_device *device, > const char *name) > { > struct console *earlycon = device->con; > - struct uart_port *port = &device->port; > const char *s; > size_t len; > > @@ -70,6 +69,12 @@ static void __init earlycon_init(struct earlycon_device *device, > len = s - name; > strlcpy(earlycon->name, name, min(len + 1, sizeof(earlycon->name))); > earlycon->data = &early_console_dev; > +} > + > +static void __init earlycon_print_info(struct earlycon_device *device) > +{ > + struct console *earlycon = device->con; > + struct uart_port *port = &device->port; > > if (port->iotype == UPIO_MEM || port->iotype == UPIO_MEM16 || > port->iotype == UPIO_MEM32 || port->iotype == UPIO_MEM32BE) > @@ -140,6 +145,7 @@ static int __init register_earlycon(char *buf, const struct earlycon_id *match) > > earlycon_init(&early_console_dev, match->name); > err = match->setup(&early_console_dev, buf); > + earlycon_print_info(&early_console_dev); > if (err < 0) > return err; > if (!early_console_dev.con->write) > @@ -302,6 +308,7 @@ int __init of_setup_earlycon(const struct earlycon_id *match, > } > earlycon_init(&early_console_dev, match->name); > err = match->setup(&early_console_dev, options); > + earlycon_print_info(&early_console_dev); > if (err < 0) > return err; > if (!early_console_dev.con->write) > -- > 2.28.0.618.gf4bc123cb7-goog >
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c index 2ae9190b64bb9..b70877932d47d 100644 --- a/drivers/tty/serial/earlycon.c +++ b/drivers/tty/serial/earlycon.c @@ -56,7 +56,6 @@ static void __init earlycon_init(struct earlycon_device *device, const char *name) { struct console *earlycon = device->con; - struct uart_port *port = &device->port; const char *s; size_t len; @@ -70,6 +69,12 @@ static void __init earlycon_init(struct earlycon_device *device, len = s - name; strlcpy(earlycon->name, name, min(len + 1, sizeof(earlycon->name))); earlycon->data = &early_console_dev; +} + +static void __init earlycon_print_info(struct earlycon_device *device) +{ + struct console *earlycon = device->con; + struct uart_port *port = &device->port; if (port->iotype == UPIO_MEM || port->iotype == UPIO_MEM16 || port->iotype == UPIO_MEM32 || port->iotype == UPIO_MEM32BE) @@ -140,6 +145,7 @@ static int __init register_earlycon(char *buf, const struct earlycon_id *match) earlycon_init(&early_console_dev, match->name); err = match->setup(&early_console_dev, buf); + earlycon_print_info(&early_console_dev); if (err < 0) return err; if (!early_console_dev.con->write) @@ -302,6 +308,7 @@ int __init of_setup_earlycon(const struct earlycon_id *match, } earlycon_init(&early_console_dev, match->name); err = match->setup(&early_console_dev, options); + earlycon_print_info(&early_console_dev); if (err < 0) return err; if (!early_console_dev.con->write)
8250 devices may modify iotype in their own earlycon setup. For example: 8250_mtk and 8250_uniphier force iotype to be MMIO32. Print earlycon info after match->setup to reflect actual earlycon info. Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> --- Change: v1->v2: rename function --- drivers/tty/serial/earlycon.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)