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author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-02-24 23:17:14 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-02-24 23:17:14 +0300 |
commit | 17cd4d6f05087ea1ae5c1416ef260e5b7fc5d5c9 (patch) | |
tree | bf06872140bc74115625e34f590b9ccc6270cbd6 /drivers/tty/serial/earlycon-semihost.c | |
parent | 72bffe7e1eb6cb82b90aa14cd786f3f5ede9e0ae (diff) | |
parent | 72206cc730b5c9208e9a99ace1c619f542035312 (diff) | |
download | linux-17cd4d6f05087ea1ae5c1416ef260e5b7fc5d5c9.tar.xz |
Merge tag 'tty-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty / serial driver updates from Greg KH:
"Here is the big set of serial and tty driver updates for 6.3-rc1.
Once again, Jiri and Ilpo have done a number of core vt and tty/serial
layer cleanups that were much needed and appreciated. Other than that,
it's just a bunch of little tty/serial driver updates:
- qcom-geni-serial driver updates
- liteuart driver updates
- hvcs driver cleanups
- n_gsm updates and additions for new features
- more 8250 device support added
- fpga/dfl update and additions
- imx serial driver updates
- fsl_lpuart updates
- other tiny fixes and updates for serial drivers
All of these have been in linux-next for a while with no reported
problems"
* tag 'tty-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (143 commits)
tty: n_gsm: add keep alive support
serial: imx: remove a redundant check
dt-bindings: serial: snps-dw-apb-uart: add dma & dma-names properties
soc: qcom: geni-se: Move qcom-geni-se.h to linux/soc/qcom/geni-se.h
tty: n_gsm: add TIOCMIWAIT support
tty: n_gsm: add RING/CD control support
tty: n_gsm: mark unusable ioctl structure fields accordingly
serial: imx: get rid of registers shadowing
serial: imx: refine local variables in rxint()
serial: imx: stop using USR2 in FIFO reading loop
serial: imx: remove redundant USR2 read from FIFO reading loop
serial: imx: do not break from FIFO reading loop prematurely
serial: imx: do not sysrq broken chars
serial: imx: work-around for hardware RX flood
serial: imx: factor-out common code to imx_uart_soft_reset()
serial: 8250_pci1xxxx: Add power management functions to quad-uart driver
serial: 8250_pci1xxxx: Add RS485 support to quad-uart driver
serial: 8250_pci1xxxx: Add driver for quad-uart support
serial: 8250_pci: Add serial8250_pci_setup_port definition in 8250_pcilib.c
tty: pcn_uart: fix memory leak with using debugfs_lookup()
...
Diffstat (limited to 'drivers/tty/serial/earlycon-semihost.c')
-rw-r--r-- | drivers/tty/serial/earlycon-semihost.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/tty/serial/earlycon-semihost.c b/drivers/tty/serial/earlycon-semihost.c new file mode 100644 index 000000000000..e4692a8433f9 --- /dev/null +++ b/drivers/tty/serial/earlycon-semihost.c @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2012 ARM Ltd. + * Author: Marc Zyngier <marc.zyngier@arm.com> + * + * Adapted for ARM and earlycon: + * Copyright (C) 2014 Linaro Ltd. + * Author: Rob Herring <robh@kernel.org> + */ +#include <linux/kernel.h> +#include <linux/console.h> +#include <linux/init.h> +#include <linux/serial_core.h> +#include <asm/semihost.h> + +static void smh_write(struct console *con, const char *s, unsigned n) +{ + struct earlycon_device *dev = con->data; + uart_console_write(&dev->port, s, n, smh_putc); +} + +static int +__init early_smh_setup(struct earlycon_device *device, const char *opt) +{ + device->con->write = smh_write; + return 0; +} +EARLYCON_DECLARE(smh, early_smh_setup); |