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2015-12-14tty: Only allow slave pty as controlling ttyPeter Hurley1-1/+1
A master pty should never be a controlling tty in Linux; if the master pty is specified to ioctl(TIOCSCTTY), silently substitute the slave pty as the controlling tty. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: core: Prefer dev_dbg() over pr_debug()Peter Hurley1-1/+1
Where possible, use dev_dbg() instead of pr_debug() Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: Merge conditional + error message + WARN_ON()Peter Hurley1-8/+2
WARN() does all of these things in one statement. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: Remove __func__ from tty_debug() macroPeter Hurley4-11/+10
Now that tty_debug() macro uses pr_debug(), the function name can be printed when using dynamic debug; printing the function name within the format string is redundant. Remove the __func__ parameter and print specifier from the format string. Add context to messages for when the function name is not printed by dynamic debug, or when dynamic debug is not enabled. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: core: Prefer pr_* to printk(*)Peter Hurley2-8/+4
Convert remaining printk() use to pr_*() when tty is unknown or unsafe to use. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: Remove unset_locked_termios() error messagePeter Hurley1-5/+0
With the refactor of 'locked' from parameter to local, it's now obvious locked cannot be NULL. Remove entire conditional. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: core: Refactor parameters for unset_locked_termios() helperPeter Hurley1-4/+4
Add tty as parameter to unset_locked_termios() and extract former parameters, termios and locked, as locals. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: core: Add driver name to invalid device registration messagePeter Hurley1-2/+2
Include the driver name in the tty_register_device_attr() error message for invalid index. Note that tty_err() cannot be used here because there is no tty; use pr_err(). Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: Convert SAK messages to tty_notice()Peter Hurley1-12/+8
Use tty_notice() for unified message format from the tty core. Fix each message to accurately reflect the cause of each termination. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: Define tty_*() printk macrosPeter Hurley4-28/+27
Since not all ttys are devices (eg., SysV ptys), dev_*() printk macros cannot be used. Define tty_*() printk macros that output in similar format to dev_*() macros (ie., <driver> <tty>: .....). Transform the most-trivial printk( LEVEL ...) usage to tty_*() usage. NB: The function name has been eliminated from messages with unique context, or prefixed to the format when given. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: core: Add helper fn to deref tty driver namePeter Hurley2-0/+8
Similar to tty_name(), add tty_driver_name() helper to safely dereference tty->driver->name (otherwise return empty string). Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: core: Remove redundant oom messagePeter Hurley1-3/+1
kmalloc() already emits a diagnostic for failed allocations; remove tty-specific message. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: synclink_gt: Rename tty_driver_namePeter Hurley1-2/+2
Eliminate symbol name collision with new tty core function, tty_driver_name(). Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: Make tty_paranoia_check() file scopePeter Hurley2-3/+1
tty_paranoia_check() is only used within drivers/tty/tty_io.c; remove extern declaration in header and limit symbol to file scope. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: Improve tty_debug() macroPeter Hurley1-5/+2
Incorporate suggestions for tty core debug macro improvements - printk(KERN_DEBUG) => pr_debug() - ##args => ##__VA_ARGS__ - remove do {} while() - output tty_name() first cc: Joe Perches <joe@perches.com> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: amba-pl011: prepare REG_* register indexesRussell King2-97/+140
Prepare for REG_* register accessors. This change involves introducing pl011_reg_to_offset() to convert REG_* to the hardware register offset, and converting all call sites to use REG_* names. We need to fix up locations where we check for equivalence of register offsets as well. Much of this change was made via these sed expressions: s/ST_UART01[1x]\(_[^_]*\|_LCRH_[TR]X\)\>/REG_ST\1/ s/UART01[1x]_\(DR\|RSR\|ECR\|FR\|ILPR\|[IF]BRD\|LCRH\|CR\|IFLS\|IMSC\|RIS\|MIS\|ICR\|DMACR\)\>/REG_\1/g Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: amba-pl011: add helper to detect split LCRH registerRussell King1-2/+7
Add a helper to detect the split LCRH register found on ST variants. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: amba-pl011: convert accessor functions to take uart_amba_portRussell King1-102/+97
Convert the new accessor functions to take the uart_amba_port instead of the port base address. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: amba-pl011: add register accessor functionsRussell King1-98/+112
Add register accessor functions to amba-pl011. Much of this transformation was done using the sed expression below, with any left-overs fixed up manually afterwards, and code formatted to remain within coding style. s/readw(\(uap->port.membase\|regs\|port->membase\) +/pl011_read(\1,/g s/writew(\(.*\) +/pl011_write(\1,/g Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial: support 16-bit register interface for consoleMasahiro Yamada9-13/+57
Currently, 8-bit (MMIO) and 32-bit (MMIO32) register interfaces are supported for the 8250 console, but the 16-bit (MMIO16) is not. The 8250 UART device on my board is connected to a 16-bit bus and my main motivation is to use earlycon with it. (Refer to arch/arm/boot/dts/uniphier-support-card.dtsi) Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial: 8250_early: squash wait_for_xmitr() into serial_putc()Masahiro Yamada1-8/+4
Now, wait_for_xmitr() is only called from serial_putc(), and both are short enough. They can be merged into a single function. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial: 8250_early: confirm empty transmitter after sending charactersMasahiro Yamada1-4/+1
The current code waits until the transmitter becomes empty, before sending each character, and after finishing the whole string. This seems a bit redundant. It can be more efficient by checking the transmitter only after sending each character. This should be safe because the transmitter is already empty at the first entry of serial_putc(). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial: 8250_early: do not save and restore IER in write callbackMasahiro Yamada1-10/+1
The IER has already been masked in early_serial8250_setup(), there is no reason to save and restore it every time early_serial8250_write() is called. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14vt: Deinline save_screen, save 238 bytesDenys Vlasenko1-1/+1
This function compiles to 79 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: Deinline __ldsem_down_write_nested, save 128 bytesDenys Vlasenko1-1/+1
This function compiles to 491 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty: Deinline __ldsem_down_read_nested, save 128 bytesDenys Vlasenko1-1/+1
This function compiles to 479 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial/vt8500_serial: Deinline wait_for_xmitr, save 165 bytesDenys Vlasenko1-1/+1
This function compiles to 141 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial/sunsu: Deinline wait_for_xmitr, save 165 bytesDenys Vlasenko1-1/+1
This function compiles to 141 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial/sprd_serial: Deinline wait_for_xmitr, save 165 bytesDenys Vlasenko1-1/+1
This function compiles to 141 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial/pxa: Deinline wait_for_xmitr, save 165 bytesDenys Vlasenko1-1/+1
This function compiles to 141 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial/omap-serial: Deinline wait_for_xmitr, save 165 bytesDenys Vlasenko1-1/+1
This function compiles to 141 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial/men_z135_uart: Deinline men_z135_reg_clr, save 176 bytesDenys Vlasenko1-1/+1
This function compiles to 98 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CC: Peter Hurley <peter@hurleysoftware.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial/m32r_sio: Deinline wait_for_xmitr, save 165 bytesDenys Vlasenko1-1/+1
This function compiles to 141 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14isicom: Deinline drop_dtr, save 112 bytesDenys Vlasenko1-1/+1
This function compiles to 181 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14cyclades: Deinline cyz_is_loaded, save 240 bytesDenys Vlasenko1-1/+1
This function compiles to 58 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14tty/tty_ldisc: Deinline tty_ldisc_put, save 368 bytesDenys Vlasenko1-1/+1
This function compiles to 72 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial_core: Deinline uart_update_mctrl, save 304 bytesDenys Vlasenko1-1/+1
This function compiles to 92 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial/jsm: Deinline neo_parse_isr, save 688 bytesDenys Vlasenko1-1/+1
This function compiles to 811 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial/bcm63xx_uart: Deinline wait_for_xmitr, save 374 bytesDenys Vlasenko1-1/+1
This function compiles to 141 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14isicom: Deinline WaitTillCardIsFree, save 1120 bytesDenys Vlasenko1-1/+1
This function compiles to 96 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14cyclades: Deinline serial_paranoia_check, save 304 bytesDenys Vlasenko1-1/+1
This function compiles to 52 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14cyclades: Deinline cyy_writeb, save 880 bytesDenys Vlasenko1-1/+1
This function compiles to 35 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14cyclades: Deinline cyy_readb, save 368 bytesDenys Vlasenko1-1/+1
This function compiles to 32 bytes of machine code. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jiri Slaby <jslaby@suse.com> CC: linux-serial@vger.kernel.org Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial: 8250_ingenic: allow to be independent of SERIAL_8250_CONSOLEMasahiro Yamada2-1/+3
This UART driver should not depend on the console. They should be orthogonal. Surround the earlycon code with CONFIG_SERIAL_EARLYCON conditional and rip off "depends on SERIAL_8250_CONSOLE". Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial: 8250_ingenic: delete redundant "select SERIAL_EARLYCON"Masahiro Yamada1-1/+0
SERIAL_8250_INGENIC depends on SERIAL_8250_CONSOLE, which already selects SERIAL_EARLYCON. This line is redundant. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial: 8250_uniphier: add earlycon supportMasahiro Yamada1-0/+24
This reuses the code of drivers/tty/serial/8250/8250_early.c except - Overwrite device->port.iotype and device->port.regshift for UPIO_MEM32 because of_setup_earlycon() has set them for UPIO_MEM. - Set device->baud to zero to prevent early8250_setup() from initializing the divisor register because port->uartclk does not match the frequency expected by this hardware. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14drivers/tty/serial: make 8250/8250_mtk.c explicitly non-modularPaul Gortmaker1-28/+7
The Kconfig currently controlling compilation of this code is: drivers/tty/serial/8250/Kconfig:config SERIAL_8250_MT6577 drivers/tty/serial/8250/Kconfig: bool "Mediatek serial port support" ...meaning that it currently is not being built as a module by anyone. Lets remove the modular code that is essentially orphaned, so that when reading the driver there is no doubt it is builtin-only. We explicitly disallow a driver unbind, since that doesn't have a sensible use case anyway, and it allows us to drop the ".remove" code for non-modular drivers. Since module_platform_driver() uses the same init level priority as builtin_platform_driver() the init ordering remains unchanged with this commit. We also delete the MODULE_LICENSE tag etc. since all that information is already contained at the top of the file in the comments. Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code. Cc: Jiri Slaby <jslaby@suse.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: linux-serial@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mediatek@lists.infradead.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14drivers/tty/serial: make serial/atmel_serial.c explicitly non-modularPaul Gortmaker1-41/+4
The Kconfig currently controlling compilation of this code is: drivers/tty/serial/Kconfig:config SERIAL_ATMEL drivers/tty/serial/Kconfig: bool "AT91 / AT32 on-chip serial port support" ...meaning that it currently is not being built as a module by anyone. Lets remove the modular code that is essentially orphaned, so that when reading the driver there is no doubt it is builtin-only. We explicitly disallow a driver unbind, since that doesn't have a sensible use case anyway, and it allows us to drop the ".remove" code for non-modular drivers. Since module_init translates to device_initcall in the non-modular case, the init ordering remains unchanged with this commit. We don't replace module.h with init.h since the file already has that. We also delete the MODULE_LICENSE tag etc. since all that information is already contained at the top of the file in the comments. Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Jiri Slaby <jslaby@suse.com> Cc: linux-serial@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial: imx: reorder functions and simplify a bitUwe Kleine-König1-45/+45
Now that imx_mctrl_check is implemented below imx_get_mctrl the former can call the latter directly instead of via sport->port.ops->get_mctrl. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-14serial: imx: repair and complete handshakingUwe Kleine-König1-6/+17
The .get_mctrl callback should not report the status of RTS or LOOP, so drop this. Instead implement reporting the state of CAR (aka DCD) and RI. For .set_mctrl implement setting the DTR line. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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