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2022-10-14Merge tag 'parisc-for-6.1-1' of ↵Linus Torvalds1-15/+0
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc updates from Helge Deller: "Fixes: - When we added basic vDSO support in kernel 5.18 we introduced a bug which prevented a mmap() of graphic card memory. This is because we used the DMB (data memory break trap bit) page flag as special-bit, but missed to clear that bit when loading the TLB. - Graphics card memory size was not correctly aligned - Spelling fixes (from Colin Ian King) Enhancements: - PDC console (which uses firmware calls) now rewritten as early console - Reduced size of alternative tables" * tag 'parisc-for-6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Fix spelling mistake "mis-match" -> "mismatch" in eisa driver parisc: Fix userspace graphics card breakage due to pgtable special bit parisc: fbdev/stifb: Align graphics memory size to 4MB parisc: Convert PDC console to an early console parisc: Reduce kernel size by packing alternative tables
2022-10-11parisc: Convert PDC console to an early consoleHelge Deller1-15/+0
Rewrite the PDC console to become an early console. Beside the fact that now boot information is visible until another (text- or graphics) console takes over, this benefits as well machines with a yet-unsupported STI console and kgdb. Signed-off-by: Helge Deller <deller@gmx.de>
2022-10-07Merge tag 'tty-6.1-rc1' of ↵Linus Torvalds105-696/+849
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 TTY and Serial driver updates for 6.1-rc1. Lots of cleanups in here, no real new functionality this time around, with the diffstat being that we removed more lines than we added! Included in here are: - termios unification cleanups from Al Viro, it's nice to finally get this work done - tty serial transmit cleanups in various drivers in preparation for more cleanup and unification in future releases (that work was not ready for this release) - n_gsm fixes and updates - ktermios cleanups and code reductions - dt bindings json conversions and updates for new devices - some serial driver updates for new devices - lots of other tiny cleanups and janitorial stuff. Full details in the shortlog. All of these have been in linux-next for a while with no reported issues" * tag 'tty-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (102 commits) serial: cpm_uart: Don't request IRQ too early for console port tty: serial: do unlock on a common path in altera_jtaguart_console_putc() tty: serial: unify TX space reads under altera_jtaguart_tx_space() tty: serial: use FIELD_GET() in lqasc_tx_ready() tty: serial: extend lqasc_tx_ready() to lqasc_console_putchar() tty: serial: allow pxa.c to be COMPILE_TESTed serial: stm32: Fix unused-variable warning tty: serial: atmel: Add COMMON_CLK dependency to SERIAL_ATMEL serial: 8250: Fix restoring termios speed after suspend serial: Deassert Transmit Enable on probe in driver-specific way serial: 8250_dma: Convert to use uart_xmit_advance() serial: 8250_omap: Convert to use uart_xmit_advance() MAINTAINERS: Solve warning regarding inexistent atmel-usart binding serial: stm32: Deassert Transmit Enable on ->rs485_config() serial: ar933x: Deassert Transmit Enable on ->rs485_config() tty: serial: atmel: Use FIELD_PREP/FIELD_GET tty: serial: atmel: Make the driver aware of the existence of GCLK tty: serial: atmel: Only divide Clock Divisor if the IP is USART tty: serial: atmel: Separate mode clearing between UART and USART dt-bindings: serial: atmel,at91-usart: Add gclk as a possible USART clock ...
2022-10-06Merge tag 'arm-soc-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/socLinus Torvalds1-3/+0
Pull ARM SoC updates from Arnd Bergmann: "The main changes this time are for the organization of the Kconfig files, introducing per-vendor top-level options on arm64 to match those on arm32, and making the platform selection on arm32 more uniform, in particular for the remaining StrongARM platforms that still have a couple of special cases compared to the more recent ones. I also did a cleanup of the old Footbridge platform, which was the last holdout for the phys_to_dma()/dma_to_phys() interface that is now completely gone from arm32, completing work started by Christoph Hellwig" * tag 'arm-soc-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (21 commits) ARM: aspeed: Kconfig: Fix indentation ARM: Drop CMDLINE_* dependency on ATAGS ARM: Drop CMDLINE_FORCE dependency on !ARCH_MULTIPLATFORM ARM: s3c: remove orphan declarations from arch/arm/mach-s3c/devs.h pxa: Drop if with an always false condition ARM: orion: fix include path ARM: shmobile: Drop selecting SOC_BUS arm64: renesas: Drop selecting SOC_BUS ARM: disallow PCI with MMU=n again ARM: footbridge: remove custom DMA address handling MAINTAINERS: Add BCM4908 maintainer to BCMBCA entry ARM: footbridge: move isa-dma support into footbridge ARM: footbridge: remove leftover from personal-server ARM: footbridge: remove addin mode arm64: Kconfig.platforms: Group NXP platforms together arm64: Kconfig.platforms: Re-organized Broadcom menu ARM: make ARCH_MULTIPLATFORM user-visible ARM: fix XIP_KERNEL dependencies ARM: Kconfig: clean up platform selection ARM: simplify machdirs/platdirs handling ...
2022-10-06Merge tag 'arm-drivers-6.1' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc Pull ARM driver updates from Arnd Bergmann: "The drivers branch for 6.1 is a bit larger than for most releases. Most of the changes come from SoC maintainers for the drivers/soc subsystem: - A new driver for error handling on the NVIDIA Tegra 'control backbone' bus. - A new driver for Qualcomm LLCC/DDR bandwidth measurement - New Rockchip rv1126 and rk3588 power domain drivers - DT binding updates for memory controllers, older Rockchip SoCs, various Mediatek devices, Qualcomm SCM firmware - Minor updates to Hisilicon LPC bus, the Allwinner SRAM driver, the Apple rtkit firmware driver, Tegra firmware - Minor updates for SoC drivers (Samsung, Mediatek, Renesas, Tegra, Qualcomm, Broadcom, NXP, ...) There are also some separate subsystem with downstream maintainers that merge updates this way: - Various updates and new drivers in the memory controller subsystem for Mediatek and Broadcom SoCs - Small set of changes in preparation to add support for FF-A v1.1 specification later, in the Arm FF-A firmware subsystem - debugfs support in the PSCI firmware subsystem" * tag 'arm-drivers-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (149 commits) ARM: remove check for CONFIG_DEBUG_LL_SER3 firmware/psci: Add debugfs support to ease debugging firmware/psci: Print a warning if PSCI doesn't accept PC mode dt-bindings: memory: snps,dw-umctl2-ddrc: Extend schema with IRQs/resets/clocks props dt-bindings: memory: snps,dw-umctl2-ddrc: Replace opencoded numbers with macros dt-bindings: memory: snps,dw-umctl2-ddrc: Use more descriptive device name dt-bindings: memory: synopsys,ddrc-ecc: Detach Zynq DDRC controller support soc: sunxi: sram: Add support for the D1 system control soc: sunxi: sram: Export the LDO control register soc: sunxi: sram: Save a pointer to the OF match data soc: sunxi: sram: Return void from the release function soc: apple: rtkit: Add apple_rtkit_poll soc: imx: add i.MX93 media blk ctrl driver soc: imx: add i.MX93 SRC power domain driver soc: imx: imx8m-blk-ctrl: Use genpd_xlate_onecell soc: imx: imx8mp-blk-ctrl: handle PCIe PHY resets soc: imx: imx8m-blk-ctrl: add i.MX8MP VPU blk ctrl soc: imx: add i.MX8MP HDMI blk ctrl HDCP/HRV_MWR soc: imx: add icc paths for i.MX8MP hsio/hdmi blk ctrl soc: imx: add icc paths for i.MX8MP media blk ctrl ...
2022-09-30serial: cpm_uart: Don't request IRQ too early for console portChristophe Leroy1-12/+10
The following message is seen during boot and the activation of console port gets delayed until normal serial ports activation. [ 0.001346] irq: no irq domain found for pic@930 ! The console port doesn't need irq, perform irq reservation later, during cpm_uart probe. While at it, don't use NO_IRQ but 0 which is the value returned by irq_of_parse_and_map() in case of error. By chance powerpc's NO_IRQ has value 0 but on some architectures it is -1. Fixes: 14d893fc6846 ("powerpc/8xx: Convert CPM1 interrupt controller to platform_device") Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Link: https://lore.kernel.org/r/8bed0f30c2e9ef16ae64fb1243a16d54a48eb8da.1664526717.git.christophe.leroy@csgroup.eu Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-30tty: serial: do unlock on a common path in altera_jtaguart_console_putc()Jiri Slaby1-2/+3
port->lock is unlocked in each branch in altera_jtaguart_console_putc(), so do it before the "if". "status" needs not be under the lock, as the register was already read. Cc: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Acked-by: Tobias Klauser <tklauser@distanz.ch> Link: https://lore.kernel.org/r/20220927111819.18516-4-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-30tty: serial: unify TX space reads under altera_jtaguart_tx_space()Jiri Slaby1-11/+16
TX space reads from the control register are performed in various forms on 4 places in altera_jtaguart. Unify all those and do the read and masking on a single place. The new helper altera_jtaguart_tx_space() uses FIELD_GET(), so we can drop ALTERA_JTAGUART_CONTROL_WSPACE_OFF now. Cc: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Acked-by: Tobias Klauser <tklauser@distanz.ch> Link: https://lore.kernel.org/r/20220927111819.18516-3-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-30tty: serial: use FIELD_GET() in lqasc_tx_ready()Jiri Slaby1-2/+2
FIELD_GET() can do the job smarter and more readable. We don't even need ASCFSTAT_TXFREEOFF. So switch to the former and remove the latter. Suggested-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20220927111819.18516-2-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-30tty: serial: extend lqasc_tx_ready() to lqasc_console_putchar()Jiri Slaby1-6/+3
There is one more place where lqasc_tx_ready() can be used now: lqasc_console_putchar(). So replace the open-coded variant by the helper. Suggested-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20220927111819.18516-1-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-30tty: serial: allow pxa.c to be COMPILE_TESTedJiri Slaby1-1/+1
There is no issue compiling pxa.c even in the SERIAL_8250=y case. So to cover it in the usual configurations, add "|| COMPILE_TEST" there. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220927110528.12815-1-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-30serial: stm32: Fix unused-variable warningRen Zhijie1-3/+3
If CONFIG_SERIAL_EARLYCON and CONFIG_OF are both not set, gcc warns about unused variable: drivers/tty/serial/stm32-usart.c:83:32: error: ‘stm32h7_info’ defined but not used [-Werror=unused-variable] static struct stm32_usart_info stm32h7_info = { ^~~~~~~~~~~~ drivers/tty/serial/stm32-usart.c:61:32: error: ‘stm32f7_info’ defined but not used [-Werror=unused-variable] static struct stm32_usart_info stm32f7_info = { ^~~~~~~~~~~~ drivers/tty/serial/stm32-usart.c:40:32: error: ‘stm32f4_info’ defined but not used [-Werror=unused-variable] static struct stm32_usart_info stm32f4_info = { ^~~~~~~~~~~~ cc1: all warnings being treated as errors Mark these variables as __maybe_unused to fix this. Fixes: c7039ce904c0 ("serial: stm32: make info structs static to avoid sparse warnings") Signed-off-by: Ren Zhijie <renzhijie2@huawei.com> Link: https://lore.kernel.org/r/20220926025826.44145-1-renzhijie2@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-30tty: serial: atmel: Add COMMON_CLK dependency to SERIAL_ATMELSergiu Moga1-0/+1
Now that the driver makes use of `__clk_is_enabled()` in order to know whether a `clk_disable_unprepare()` is needed or not on the GCLK, a new dependency has been introduced: COMMON_CLK. If this `CONFIG_COMMON_CLK` is not enabled, whatever config may have this driver enabled without COMMON_CLK then an undefined reference to `__clk_is_enabled()` will be issued by the linker. Thus, make sure that, unless `CONFIG_COMMON_CLK` is enabled, this driver is not compiled. Fixes: 5e3ce1f26129 ("tty: serial: atmel: Make the driver aware of the existence of GCLK") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20220926143244.485578-1-sergiu.moga@microchip.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-27Merge branch 'master' into i2c/for-mergewindowWolfram Sang5-9/+10
2022-09-25serial: 8250: Fix restoring termios speed after suspendPali Rohár1-1/+6
Since commit edc6afc54968 ("tty: switch to ktermios and new framework") termios speed is no longer stored only in c_cflag member but also in new additional c_ispeed and c_ospeed members. If BOTHER flag is set in c_cflag then termios speed is stored only in these new members. Since commit 027b57170bf8 ("serial: core: Fix initializing and restoring termios speed") termios speed is available also in struct console. So properly restore also c_ispeed and c_ospeed members after suspend to fix restoring termios speed which is not represented by Bnnn constant. Fixes: 4516d50aabed ("serial: 8250: Use canary to restart console after suspend") Signed-off-by: Pali Rohár <pali@kernel.org> Link: https://lore.kernel.org/r/20220924104324.4035-1-pali@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-25serial: Deassert Transmit Enable on probe in driver-specific wayLukas Wunner6-41/+37
When a UART port is newly registered, uart_configure_port() seeks to deassert RS485 Transmit Enable by setting the RTS bit in port->mctrl. However a number of UART drivers interpret a set RTS bit as *assertion* instead of deassertion: Affected drivers include those using serial8250_em485_config() (except 8250_bcm2835aux.c) and some using mctrl_gpio (e.g. imx.c). Since the interpretation of the RTS bit is driver-specific, it is not suitable as a means to centrally deassert Transmit Enable in the serial core. Instead, the serial core must call on drivers to deassert it in their driver-specific way. One way to achieve that is to call ->rs485_config(). It implicitly deasserts Transmit Enable. So amend uart_configure_port() and uart_resume_port() to invoke uart_rs485_config(). That allows removing calls to uart_rs485_config() from drivers' ->probe() hooks and declaring the function static. Skip any invocation of ->set_mctrl() if RS485 is enabled. RS485 has no hardware flow control, so the modem control lines are irrelevant and need not be touched. When leaving RS485 mode, reset the modem control lines to the state stored in port->mctrl. That way, UARTs which are muxed between RS485 and RS232 transceivers drive the lines correctly when switched to RS232. (serial8250_do_startup() historically raises the OUT1 modem signal because otherwise interrupts are not signaled on ancient PC UARTs, but I believe that no longer applies to modern, RS485-capable UARTs and is thus safe to be skipped.) imx.c modifies port->mctrl whenever Transmit Enable is asserted and deasserted. Stop it from doing that so port->mctrl reflects the RS232 line state. 8250_omap.c deasserts Transmit Enable on ->runtime_resume() by calling ->set_mctrl(). Because that is now a no-op in RS485 mode, amend the function to call serial8250_em485_stop_tx(). fsl_lpuart.c retrieves and applies the RS485 device tree properties after registering the UART port. Because applying now happens on registration in uart_configure_port(), move retrieval of the properties ahead of uart_add_one_port(). Link: https://lore.kernel.org/all/20220329085050.311408-1-matthias.schiffer@ew.tq-group.com/ Link: https://lore.kernel.org/all/8f538a8903795f22f9acc94a9a31b03c9c4ccacb.camel@ginzinger.com/ Fixes: d3b3404df318 ("serial: Fix incorrect rs485 polarity on uart open") Cc: stable@vger.kernel.org # v4.14+ Reported-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com> Reported-by: Roosen Henri <Henri.Roosen@ginzinger.com> Tested-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Lukas Wunner <lukas@wunner.de> Link: https://lore.kernel.org/r/2de36eba3fbe11278d5002e4e501afe0ceaca039.1663863805.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-25serial: 8250_dma: Convert to use uart_xmit_advance()Andy Shevchenko1-3/+1
uart_xmit_advance() provides a common way on how to advance the Tx queue. Use it for the sake of unification and robustness. Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20220909091102.58941-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-25serial: 8250_omap: Convert to use uart_xmit_advance()Andy Shevchenko1-3/+1
uart_xmit_advance() provides a common way on how to advance the Tx queue. Use it for the sake of unification and robustness. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20220909091258.68886-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-25Merge 7e2cd21e02b3 ("Merge tag 'tty-6.0-rc7' of ↵Greg Kroah-Hartman5-9/+10
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty") into tty-next We need the tty fixes and api additions in this branch. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22serial: stm32: Deassert Transmit Enable on ->rs485_config()Lukas Wunner1-47/+53
The STM32 USART can control RS-485 Transmit Enable in hardware. Since commit 7df5081cbf5e ("serial: stm32: Add RS485 RTS GPIO control"), it can alternatively be controlled in software. That was done to allow RS-485 even if the RTS pin is unavailable because it's pinmuxed to a different function. However the commit neglected to deassert Transmit Enable upon invocation of the ->rs485_config() callback. Fix it. Avoid forward declarations by moving stm32_usart_tx_empty(), stm32_usart_rs485_rts_enable() and stm32_usart_rs485_rts_disable() further up in the driver. Fixes: 7df5081cbf5e ("serial: stm32: Add RS485 RTS GPIO control") Cc: stable@vger.kernel.org # v5.9+ Cc: Marek Vasut <marex@denx.de> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Lukas Wunner <lukas@wunner.de> Link: https://lore.kernel.org/r/6059eab35dba394468335ef640df8b0050fd9dbd.1662886616.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22serial: ar933x: Deassert Transmit Enable on ->rs485_config()Lukas Wunner1-0/+7
The ar933x_uart driver neglects to deassert Transmit Enable when ->rs485_config() is invoked. Fix it. Fixes: 9be1064fe524 ("serial: ar933x_uart: add RS485 support") Cc: stable@vger.kernel.org # v5.7+ Cc: Daniel Golle <daniel@makrotopia.org> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Lukas Wunner <lukas@wunner.de> Link: https://lore.kernel.org/r/5b36af26e57553f084334666e7d24c7fd131a01e.1662887231.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22serial: sifive: enable clocks for UART when probedOlof Johansson1-1/+1
When the PWM driver was changed to disable clocks if no PWMs are enabled, it ended up also disabling the shared parent with the UART, since the UART doesn't do any clock enablement on its own. To avoid these surprises, switch to clk_get_enabled(). Fixes: ace41d7564e655 ("pwm: sifive: Ensure the clk is enabled exactly once per running PWM") Cc: stable <stable@kernel.org> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com> Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Olof Johansson <olof@lixom.net> Link: https://lore.kernel.org/r/20220920160017.7315-1-olof@lixom.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22serial: 8250: omap: Use serial8250_em485_supportedMatthias Schiffer1-0/+1
8250_omap uses em485, fill in rs485_supported accordingly. This makes RS485 work with 8250_omap again, which was broken with the introduction of the RS485 config sanitization. Fixes: be2e2cb1d2819 ("serial: Sanitize rs485_struct") Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com> Link: https://lore.kernel.org/r/20220916110955.161099-1-matthias.schiffer@ew.tq-group.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22serial: fsl_lpuart: Reset prior to registrationLukas Wunner1-4/+5
Since commit bd5305dcabbc ("tty: serial: fsl_lpuart: do software reset for imx7ulp and imx8qxp"), certain i.MX UARTs are reset after they've already been registered. Register state may thus be clobbered after user space has begun to open and access the UART. Avoid by performing the reset prior to registration. Fixes: bd5305dcabbc ("tty: serial: fsl_lpuart: do software reset for imx7ulp and imx8qxp") Cc: stable@vger.kernel.org # v5.15+ Cc: Fugang Duan <fugang.duan@nxp.com> Cc: Sherry Sun <sherry.sun@nxp.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Lukas Wunner <lukas@wunner.de> Link: https://lore.kernel.org/r/72fb646c1b0b11c989850c55f52f9ff343d1b2fa.1662884345.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: atmel: Use FIELD_PREP/FIELD_GETSergiu Moga1-36/+38
Convert all open-coded instances of bitfields retrieval/setting to FIELD_PREP/FIELD_GET where possible. Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20220922113347.144383-10-sergiu.moga@microchip.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: atmel: Make the driver aware of the existence of GCLKSergiu Moga2-1/+58
Previously, the atmel serial driver did not take into account the possibility of using the more customizable generic clock as its baudrate generator. Unless there is a Fractional Part available to increase accuracy, there is a high chance that we may be able to generate a baudrate closer to the desired one by using the GCLK as the clock source. Now, depending on the error rate between the desired baudrate and the actual baudrate, the serial driver will fallback on the generic clock. The generic clock must be provided in the DT node of the serial that may need a more flexible clock source. Furthermore, define the bit that represents the choice of having GCLK as a baudrate source clock inside the USCLKS bitmask of the Mode Register of USART IP's. Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com> Link: https://lore.kernel.org/r/20220922113347.144383-9-sergiu.moga@microchip.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: atmel: Only divide Clock Divisor if the IP is USARTSergiu Moga1-1/+16
Make sure that the driver only divides the clock divisor if the IP handled at that point is USART, since UART IP's do not support implicit peripheral clock division. Instead, in the case of UART, go with the highest possible clock divisor. Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20220922113347.144383-8-sergiu.moga@microchip.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: atmel: Separate mode clearing between UART and USARTSergiu Moga2-2/+7
When clearing the mode of the serial IP inside the atmel_set_termios() method, make sure that the difference between the bitfields placement of the UART IP's and USART IP's is taken into account, as some of them overlap with each other. For example, ATMEL_UA_BRSRCCK overlaps with ATMEL_US_NBSTOP and ATMEL_US_USCLKS overlaps with ATMEL_UA_FILTER. Furthermore, add definitions for the Baud Rate Source Clock and the Filter bitfields of the Mode Register of UART IP's, since they were missing. Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com> Link: https://lore.kernel.org/r/20220922113347.144383-7-sergiu.moga@microchip.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: fsl_lpuart: disable dma rx/tx use flags in lpuart_dma_shutdownSherry Sun1-0/+2
lpuart_dma_shutdown tears down lpuart dma, but lpuart_flush_buffer can still occur which in turn tries to access dma apis if lpuart_dma_tx_use flag is true. At this point since dma is torn down, these dma apis can abort. Set lpuart_dma_tx_use and the corresponding rx flag lpuart_dma_rx_use to false in lpuart_dma_shutdown so that dmas are not accessed after they are relinquished. Otherwise, when try to kill btattach, kernel may panic. This patch may fix this issue. root@imx8ulpevk:~# btattach -B /dev/ttyLP2 -S 115200 ^C[ 90.182296] Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP [ 90.189806] Modules linked in: moal(O) mlan(O) [ 90.194258] CPU: 0 PID: 503 Comm: btattach Tainted: G O 5.15.32-06136-g34eecdf2f9e4 #37 [ 90.203554] Hardware name: NXP i.MX8ULP 9X9 EVK (DT) [ 90.208513] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 90.215470] pc : fsl_edma3_disable_request+0x8/0x60 [ 90.220358] lr : fsl_edma3_terminate_all+0x34/0x20c [ 90.225237] sp : ffff800013f0bac0 [ 90.228548] x29: ffff800013f0bac0 x28: 0000000000000001 x27: ffff000008404800 [ 90.235681] x26: ffff000008404960 x25: ffff000008404a08 x24: ffff000008404a00 [ 90.242813] x23: ffff000008404a60 x22: 0000000000000002 x21: 0000000000000000 [ 90.249946] x20: ffff800013f0baf8 x19: ffff00000559c800 x18: 0000000000000000 [ 90.257078] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 [ 90.264211] x14: 0000000000000003 x13: 0000000000000000 x12: 0000000000000040 [ 90.271344] x11: ffff00000600c248 x10: ffff800013f0bb10 x9 : ffff000057bcb090 [ 90.278477] x8 : fffffc0000241a08 x7 : ffff00000534ee00 x6 : ffff000008404804 [ 90.285609] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff0000055b3480 [ 90.292742] x2 : ffff8000135c0000 x1 : ffff00000534ee00 x0 : ffff00000559c800 [ 90.299876] Call trace: [ 90.302321] fsl_edma3_disable_request+0x8/0x60 [ 90.306851] lpuart_flush_buffer+0x40/0x160 [ 90.311037] uart_flush_buffer+0x88/0x120 [ 90.315050] tty_driver_flush_buffer+0x20/0x30 [ 90.319496] hci_uart_flush+0x44/0x90 [ 90.323162] +0x34/0x12c [ 90.327253] tty_ldisc_close+0x38/0x70 [ 90.331005] tty_ldisc_release+0xa8/0x190 [ 90.335018] tty_release_struct+0x24/0x8c [ 90.339022] tty_release+0x3ec/0x4c0 [ 90.342593] __fput+0x70/0x234 [ 90.345652] ____fput+0x14/0x20 [ 90.348790] task_work_run+0x84/0x17c [ 90.352455] do_exit+0x310/0x96c [ 90.355688] do_group_exit+0x3c/0xa0 [ 90.359259] __arm64_sys_exit_group+0x1c/0x20 [ 90.363609] invoke_syscall+0x48/0x114 [ 90.367362] el0_svc_common.constprop.0+0xd4/0xfc [ 90.372068] do_el0_svc+0x2c/0x94 [ 90.375379] el0_svc+0x28/0x80 [ 90.378438] el0t_64_sync_handler+0xa8/0x130 [ 90.382711] el0t_64_sync+0x1a0/0x1a4 [ 90.386376] Code: 17ffffda d503201f d503233f f9409802 (b9400041) [ 90.392467] ---[ end trace 2f60524b4a43f1f6 ]--- [ 90.397073] note: btattach[503] exited with preempt_count 1 [ 90.402636] Fixing recursive fault but reboot is needed! Fixes: 6250cc30c4c4 ("tty: serial: fsl_lpuart: Use scatter/gather DMA for Tx") Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Thara Gopinath <tgopinath@microsoft.com> Signed-off-by: Sherry Sun <sherry.sun@nxp.com> Link: https://lore.kernel.org/r/20220920111703.1532-1-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22serial: 8250: Toggle IER bits on only after irq has been set upIlpo Järvinen2-8/+16
Invoking TIOCVHANGUP on 8250_mid port on Ice Lake-D and then reopening the port triggers these faults during serial8250_do_startup(): DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Write NO_PASID] Request device [00:1a.0] fault addr 0x0 [fault reason 0x05] PTE Write access is not set If the IRQ hasn't been set up yet, the UART will have zeroes in its MSI address/data registers. Disabling the IRQ at the interrupt controller won't stop the UART from performing a DMA write to the address programmed in its MSI address register (zero) when it wants to signal an interrupt. The UARTs (in Ice Lake-D) implement PCI 2.1 style MSI without masking capability, so there is no way to mask the interrupt at the source PCI function level, except disabling the MSI capability entirely, but that would cause it to fall back to INTx# assertion, and the PCI specification prohibits disabling the MSI capability as a way to mask a function's interrupt service request. The MSI address register is zeroed by the hangup as the irq is freed. The interrupt is signalled during serial8250_do_startup() performing a THRE test that temporarily toggles THRI in IER. The THRE test currently occurs before UART's irq (and MSI address) is properly set up. Refactor serial8250_do_startup() such that irq is set up before the THRE test. The current irq setup code is intermixed with the timer setup code. As THRE test must be performed prior to the timer setup, extract it into own function and call it only after the THRE test. The ->setup_timer() needs to be part of the struct uart_8250_ops in order to not create circular dependency between 8250 and 8250_base modules. Fixes: 40b36daad0ac ("[PATCH] 8250 UART backup timer") Reported-by: Lennert Buytenhek <buytenh@arista.com> Tested-by: Lennert Buytenhek <buytenh@arista.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20220922070005.2965-1-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22serial: 8250: Request full 16550A feature probing for OxSemi PCIe devicesMaciej W. Rozycki1-0/+5
Oxford Semiconductor PCIe (Tornado) 950 serial port devices need to operate in the enhanced mode via the EFR register for the Divide-by-M N/8 baud rate generator prescaler to be used in their native UART mode. Otherwise the prescaler is fixed at 1 causing grossly incorrect baud rates to be programmed. Accessing the EFR register requires 16550A features to have been probed for, so request this to happen regardless of SERIAL_8250_16550A_VARIANTS by setting UPF_FULL_PROBE in port flags. Fixes: 366f6c955d4d ("serial: 8250: Add proper clock handling for OxSemi PCIe devices") Cc: stable@vger.kernel.org # v5.19+ Reported-by: Anders Blomdell <anders.blomdell@control.lth.se> Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk> Link: https://lore.kernel.org/r/alpine.DEB.2.21.2209210005040.41633@angie.orcam.me.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22serial: 8250: Let drivers request full 16550A feature probingMaciej W. Rozycki1-1/+2
A SERIAL_8250_16550A_VARIANTS configuration option has been recently defined that lets one request the 8250 driver not to probe for 16550A device features so as to reduce the driver's device startup time in virtual machines. Some actual hardware devices require these features to have been fully determined however for their driver to work correctly, so define a flag to let drivers request full 16550A feature probing on a device-by-device basis if required regardless of the SERIAL_8250_16550A_VARIANTS option setting chosen. Fixes: dc56ecb81a0a ("serial: 8250: Support disabling mdelay-filled probes of 16550A variants") Cc: stable@vger.kernel.org # v5.6+ Reported-by: Anders Blomdell <anders.blomdell@control.lth.se> Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk> Link: https://lore.kernel.org/r/alpine.DEB.2.21.2209202357520.41633@angie.orcam.me.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: extract serial_omap_put_char() from transmit_chars()Jiri Slaby1-9/+11
This non-trivial code is doubled in transmit_chars(), so it deserves its own function. This will make next patches easier. Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220920052049.20507-8-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: switch mpc52xx_uart_int_{r,t}x_chars() to boolJiri Slaby1-9/+9
mpc52xx_uart_int_rx_chars() returns unsigned int. mpc52xx_uart_int_tx_chars() returns int. The both results are binary ORed to the "keepgoing" variable. Unify all three to bool as the only interesting value is whether we should keep looping (true/false). Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220920052049.20507-7-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: extract tx_ready() from __serial_lpc32xx_tx()Jiri Slaby1-2/+8
The condition in __serial_lpc32xx_tx()'s loop is barely readable. Extract it to a separate function. This will make the cleanup in the next patches easier too. Cc: Vladimir Zapolskiy <vz@mleia.com> Cc: <linux-arm-kernel@lists.infradead.org> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220920052049.20507-6-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: extract lqasc_tx_ready() from lqasc_tx_chars()Jiri Slaby1-2/+8
The condition in lqasc_tx_chars()'s loop is barely readable. Extract it to a separate function. This will make the cleanup in the next patches easier too. (Put it before lqasc_start_tx(), so that we can use it there later.) Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220920052049.20507-5-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: altera_uart_{r,t}x_chars() need only uart_portJiri Slaby1-6/+4
Both altera_uart_{r,t}x_chars() need only uart_port, not altera_uart. So pass the former from altera_uart_interrupt() directly. Apart it maybe saves a dereference, this makes the transition of altera_uart_tx_chars() easier to follow in the next patch. Cc: Tobias Klauser <tklauser@distanz.ch> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Acked-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220920052049.20507-4-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: clean up stop-tx part in altera_uart_tx_chars()Jiri Slaby1-4/+2
The "stop TX" path in altera_uart_tx_chars() is open-coded, so: * use uart_circ_empty() to check if the buffer is empty, and * when true, call altera_uart_stop_tx(). Cc: Tobias Klauser <tklauser@distanz.ch> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Acked-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220920052049.20507-3-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: move and cleanup vt8500_tx_empty()Jiri Slaby1-7/+8
Make vt8500_tx_empty() more readable by introducing a new local variable and move the function before handle_tx(). That way we can reuse it in there too. Cc: <linux-arm-kernel@lists.infradead.org> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220920052049.20507-2-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: hvc: remove HVC_IUCV_MAGICнаб1-6/+5
According to Greg, in the context of magic numbers as defined in magic-number.rst, "the tty layer should not need this and I'll gladly take patches" This stretches that definition slightly, since it multiplexes it with the terminal number as a constant offset, but is equivalent Acked-by: Jiri Slaby <jirislaby@kernel.org> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/ Link: https://lore.kernel.org/r/8c8a2c9dfc1bfbe6ef3f3237368e483865fc1c29.1663288066.git.nabijaczleweli@nabijaczleweli.xyz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: synclink_gt: remove MGSL_MAGICнаб1-8/+0
According to Greg, in the context of magic numbers as defined in magic-number.rst, "the tty layer should not need this and I'll gladly take patches" Acked-by: Jiri Slaby <jirislaby@kernel.org> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/ Link: https://lore.kernel.org/r/3d82b3c864970cdec6717c56dd906b54e78694d7.1663288066.git.nabijaczleweli@nabijaczleweli.xyz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: n_hdlc: remove HDLC_MAGICнаб1-27/+0
According to Greg, in the context of magic numbers as defined in magic-number.rst, "the tty layer should not need this and I'll gladly take patches" Acked-by: Jiri Slaby <jirislaby@kernel.org> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/ Link: https://lore.kernel.org/r/c31d228302da3f426cebf6fcff855181a5590a66.1663288066.git.nabijaczleweli@nabijaczleweli.xyz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: remove TTY_DRIVER_MAGICнаб1-1/+0
According to Greg, in the context of magic numbers as defined in magic-number.rst, "the tty layer should not need this and I'll gladly take patches" Acked-by: Jiri Slaby <jirislaby@kernel.org> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/ Link: https://lore.kernel.org/r/723478a270a3858f27843cbec621df4d5d44efcc.1663288066.git.nabijaczleweli@nabijaczleweli.xyz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: remove TTY_MAGICнаб2-14/+0
According to Greg, in the context of magic numbers as defined in magic-number.rst, "the tty layer should not need this and I'll gladly take patches" Acked-by: Jiri Slaby <jirislaby@kernel.org> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/ Link: https://lore.kernel.org/r/476d024cd6b04160a5de381ea2b9856b60088cbd.1663288066.git.nabijaczleweli@nabijaczleweli.xyz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22drivers: serial: jsm: fix some leaks in probeDan Carpenter1-1/+2
This error path needs to unwind instead of just returning directly. Fixes: 03a8482c17dd ("drivers: serial: jsm: Enable support for Digi Classic adapters") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Link: https://lore.kernel.org/r/YyxFh1+lOeZ9WfKO@kili Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22serial: omap: Disallow RS-485 if rts-gpio is not specifiedLukas Wunner1-14/+13
The serial-omap driver requires an rts-gpio for RS-485 to work. Historically it has allowed enabling RS-485 even if no rts-gpio was specified in the device tree. That doesn't make any sense, so disable RS-485 on probe if rts-gpio is missing and disallow user space from enabling it. Three NULL pointer checks for up->rts_gpiod can be dropped as a result, simplifying the driver slightly. Cc: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lukas Wunner <lukas@wunner.de> Link: https://lore.kernel.org/r/f191dcca0d8ea03598c463fc0d3fba8941ff2275.1662888075.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: serial: cpm_uart: remove unused cpm_uart_nr declarationGaosheng Cui1-1/+0
cpm_uart_nr has been removed since commit 0b2a2e5b7747 ("cpm_uart: Remove !CONFIG_PPC_CPM_NEW_BINDING code"), so remove it. Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com> Link: https://lore.kernel.org/r/20220911093654.3222701-1-cuigaosheng1@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: n_gsm: add debug bit for user payloadDaniel Starke1-0/+5
A debug bit to output a complete transmission dump exists. Sometimes only the user frames are relevant. Add an additional bit which limits the transmission dump output to user data frames if set. Signed-off-by: Daniel Starke <daniel.starke@siemens.com> Link: https://lore.kernel.org/r/20220831073800.7459-6-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: n_gsm: name the debug bitsDaniel Starke1-12/+19
Introduce defines to name the various debug bits used within the code to improve readability and to make its specific use clear. Signed-off-by: Daniel Starke <daniel.starke@siemens.com> Link: https://lore.kernel.org/r/20220831073800.7459-5-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-22tty: n_gsm: introduce gsm_control_command() functionDaniel Starke1-7/+26
Move the content of gsm_control_transmit() to a new function gsm_control_command() with a more generic signature and analog to gsm_control_reply(). Use this within gsm_control_transmit(). This is needed to simplify upcoming functional additions. Signed-off-by: Daniel Starke <daniel.starke@siemens.com> Link: https://lore.kernel.org/r/20220831073800.7459-4-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-13 05:49:06 +0000