diff options
| author | Dmitry Safonov <dima@arista.com> | 2019-12-13 03:06:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-18 17:04:42 +0300 |
| commit | d68fefdd5b5f107403568c8a4650e858132bd83a (patch) | |
| tree | ae225c6292d02b101b23d5aaf780a0611670bd3c /drivers/tty/serial/8250/8250_of.c | |
| parent | c3a4e5527351c73b665596d4dd27ce482e93f50c (diff) | |
| download | linux-d68fefdd5b5f107403568c8a4650e858132bd83a.tar.xz | |
tty/serial: Migrate 8250_fsl to use has_sysrq
The SUPPORT_SYSRQ ifdeffery is not nice as:
- May create misunderstanding about sizeof(struct uart_port) between
different objects
- Prevents moving functions from serial_core.h
- Reduces readability (well, it's ifdeffery - it's hard to follow)
In order to remove SUPPORT_SYSRQ, has_sysrq variable has been added.
Initialise it in driver's probe and remove ifdeffery.
In contrast to 8250/8250_of, legacy_serial on powerpc does fill
(struct plat_serial8250_port). The reason is likely that it's done on
device_initcall(), not on probe. So, 8250_core is not yet probed.
Propagate value from platform_device on 8250 probe - in case powepc
legacy driver it's initialized on initcall, in case 8250_of it will be
initialized later on of_platform_serial_setup().
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Dmitry Safonov <dima@arista.com>
Link: https://lore.kernel.org/r/20191213000657.931618-6-dima@arista.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/8250_of.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_of.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c index 92fbf46ce3bd..531ad67395e0 100644 --- a/drivers/tty/serial/8250/8250_of.c +++ b/drivers/tty/serial/8250/8250_of.c @@ -222,8 +222,10 @@ static int of_platform_serial_setup(struct platform_device *ofdev, if (IS_ENABLED(CONFIG_SERIAL_8250_FSL) && (of_device_is_compatible(np, "fsl,ns16550") || - of_device_is_compatible(np, "fsl,16550-FIFO64"))) + of_device_is_compatible(np, "fsl,16550-FIFO64"))) { port->handle_irq = fsl8250_handle_irq; + port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE); + } return 0; err_unprepare: |