summaryrefslogtreecommitdiffstats
path: root/drivers/tty
Commit message (Collapse)AuthorAgeFilesLines
* Merge tag 'kbuild-v5.6-2' of ↵Linus Torvalds2020-02-091-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - fix randconfig to generate a sane .config - rename hostprogs-y / always to hostprogs / always-y, which are more natual syntax. - optimize scripts/kallsyms - fix yes2modconfig and mod2yesconfig - make multiple directory targets ('make foo/ bar/') work * tag 'kbuild-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: make multiple directory targets work kconfig: Invalidate all symbols after changing to y or m. kallsyms: fix type of kallsyms_token_table[] scripts/kallsyms: change table to store (strcut sym_entry *) scripts/kallsyms: rename local variables in read_symbol() kbuild: rename hostprogs-y/always to hostprogs/always-y kbuild: fix the document to use extra-y for vmlinux.lds kconfig: fix broken dependency in randconfig-generated .config
| * kbuild: rename hostprogs-y/always to hostprogs/always-yMasahiro Yamada2020-02-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In old days, the "host-progs" syntax was used for specifying host programs. It was renamed to the current "hostprogs-y" in 2004. It is typically useful in scripts/Makefile because it allows Kbuild to selectively compile host programs based on the kernel configuration. This commit renames like follows: always -> always-y hostprogs-y -> hostprogs So, scripts/Makefile will look like this: always-$(CONFIG_BUILD_BIN2C) += ... always-$(CONFIG_KALLSYMS) += ... ... hostprogs := $(always-y) $(always-m) I think this makes more sense because a host program is always a host program, irrespective of the kernel configuration. We want to specify which ones to compile by CONFIG options, so always-y will be handier. The "always", "hostprogs-y", "hostprogs-m" will be kept for backward compatibility for a while. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* | Fix up remaining devm_ioremap_nocache() in SGI IOC3 8250 UART driverLinus Torvalds2020-02-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a merge error on my part - the driver was merged into mainline by commit c5951e7c8ee5 ("Merge tag 'mips_5.6' of git://../mips/linux") over a week ago, but nobody apparently noticed that it didn't actually build due to still having a reference to the devm_ioremap_nocache() function, removed a few days earlier through commit 6a1000bd2703 ("Merge tag 'ioremap-5.6' of git://../ioremap"). Apparently this didn't get any build testing anywhere. Not perhaps all that surprising: it's restricted to 64-bit MIPS only, and only with the new SGI_MFD_IOC3 support enabled. I only noticed because the ioremap conflicts in the ARM SoC driver update made me check there weren't any others hiding, and I found this one. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge tag 'armsoc-drivers' of ↵Linus Torvalds2020-02-081-184/+201
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc Pull ARM SoC-related driver updates from Olof Johansson: "Various driver updates for platforms: - Nvidia: Fuse support for Tegra194, continued memory controller pieces for Tegra30 - NXP/FSL: Refactorings of QuickEngine drivers to support ARM/ARM64/PPC - NXP/FSL: i.MX8MP SoC driver pieces - TI Keystone: ring accelerator driver - Qualcomm: SCM driver cleanup/refactoring + support for new SoCs. - Xilinx ZynqMP: feature checking interface for firmware. Mailbox communication for power management - Overall support patch set for cpuidle on more complex hierarchies (PSCI-based) and misc cleanups, refactorings of Marvell, TI, other platforms" * tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (166 commits) drivers: soc: xilinx: Use mailbox IPI callback dt-bindings: power: reset: xilinx: Add bindings for ipi mailbox drivers: soc: ti: knav_qmss_queue: Pass lockdep expression to RCU lists MAINTAINERS: Add brcmstb PCIe controller entry soc/tegra: fuse: Unmap registers once they are not needed anymore soc/tegra: fuse: Correct straps' address for older Tegra124 device trees soc/tegra: fuse: Warn if straps are not ready soc/tegra: fuse: Cache values of straps and Chip ID registers memory: tegra30-emc: Correct error message for timed out auto calibration memory: tegra30-emc: Firm up hardware programming sequence memory: tegra30-emc: Firm up suspend/resume sequence soc/tegra: regulators: Do nothing if voltage is unchanged memory: tegra: Correct reset value of xusb_hostr soc/tegra: fuse: Add APB DMA dependency for Tegra20 bus: tegra-aconnect: Remove PM_CLK dependency dt-bindings: mediatek: add MT6765 power dt-bindings soc: mediatek: cmdq: delete not used define memory: tegra: Add support for the Tegra194 memory controller memory: tegra: Only include support for enabled SoCs memory: tegra: Support DVFS on Tegra186 and later ...
| * \ Merge tag 'soc-fsl-next-v5.6' of ↵Olof Johansson2020-01-161-184/+201
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/leo/linux into arm/drivers NXP/FSL SoC driver updates for v5.6 QUICC Engine drivers - Improve the QE drivers to be compatible with ARM/ARM64/PPC64 architectures - Various cleanups to the QE drivers * tag 'soc-fsl-next-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/leo/linux: (49 commits) soc: fsl: qe: remove set but not used variable 'mm_gc' soc: fsl: qe: remove PPC32 dependency from CONFIG_QUICC_ENGINE soc: fsl: qe: remove unused #include of asm/irq.h from ucc.c net: ethernet: freescale: make UCC_GETH explicitly depend on PPC32 net/wan/fsl_ucc_hdlc: reject muram offsets above 64K net/wan/fsl_ucc_hdlc: fix reading of __be16 registers net/wan/fsl_ucc_hdlc: avoid use of IS_ERR_VALUE() soc: fsl: qe: avoid IS_ERR_VALUE in ucc_fast.c soc: fsl: qe: drop pointless check in qe_sdma_init() soc: fsl: qe: drop use of IS_ERR_VALUE in qe_sdma_init() soc: fsl: qe: avoid IS_ERR_VALUE in ucc_slow.c soc: fsl: qe: refactor cpm_muram_alloc_common to prevent BUG on error path soc: fsl: qe: drop broken lazy call of cpm_muram_init() soc: fsl: qe: make cpm_muram_free() ignore a negative offset soc: fsl: qe: make cpm_muram_free() return void soc: fsl: qe: change return type of cpm_muram_alloc() to s32 serial: ucc_uart: access __be32 field using be32_to_cpu serial: ucc_uart: limit brg-frequency workaround to PPC32 serial: ucc_uart: use of_property_read_u32() in ucc_uart_probe() serial: ucc_uart: stub out soft_uart_init for !CONFIG_PPC32 ... Link: https://lore.kernel.org/r/1578608351-23289-1-git-send-email-leoyang.li@nxp.com Signed-off-by: Olof Johansson <olof@lixom.net>
| | * | serial: ucc_uart: access __be32 field using be32_to_cpuRasmus Villemoes2019-12-091-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The buf member of struct qe_bd is a __be32, so to make this work on little-endian hosts, use be32_to_cpu when reading it. Reviewed-by: Timur Tabi <timur@kernel.org> Acked-by: Timur Tabi <timur@kernel.org> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Li Yang <leoyang.li@nxp.com>
| | * | serial: ucc_uart: limit brg-frequency workaround to PPC32Rasmus Villemoes2019-12-091-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to Timur Tabi This bug in older U-Boots is definitely PowerPC-specific So before allowing this driver to be built for platforms other than PPC32, make sure that we don't accept malformed device trees on those other platforms. Suggested-by: Timur Tabi <timur@kernel.org> Reviewed-by: Timur Tabi <timur@kernel.org> Acked-by: Timur Tabi <timur@kernel.org> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Li Yang <leoyang.li@nxp.com>
| | * | serial: ucc_uart: use of_property_read_u32() in ucc_uart_probe()Rasmus Villemoes2019-12-091-21/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For this to work correctly on little-endian hosts, don't access the device-tree properties directly in native endianness, but use the of_property_read_u32() helper. Reviewed-by: Timur Tabi <timur@kernel.org> Acked-by: Timur Tabi <timur@kernel.org> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Li Yang <leoyang.li@nxp.com>
| | * | serial: ucc_uart: stub out soft_uart_init for !CONFIG_PPC32Rasmus Villemoes2019-12-091-1/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Soft UART hack is only needed for some PPC-based SOCs. To allow building this driver for non-PPC, guard soft_uart_init() and its helpers by CONFIG_PPC32, and use a no-op soft_uart_init() otherwise. Reviewed-by: Timur Tabi <timur@kernel.org> Acked-by: Timur Tabi <timur@kernel.org> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Li Yang <leoyang.li@nxp.com>
| | * | serial: ucc_uart: factor out soft_uart initializationRasmus Villemoes2019-12-091-52/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The "soft uart" mechanism is a workaround for a silicon bug which (as far as I know) only affects some PPC-based SOCs. The code that determines which microcode blob to request relies on some powerpc-specific bits (e.g. the mfspr(SPRN_SVR) and hence also the asm/reg.h header). This makes it a little awkward to allow this driver to be built for non-PPC based SOCs with a QE, even if they are not affected by that silicon bug and thus don't need any of the Soft UART logic. There's no way around guarding those bits with some ifdeffery, so to keep that isolated, factor out the do-we-need-soft-uart-and-if-so-handle-the-firmware to a separate function, which we can then easily stub out for non-PPC. Reviewed-by: Timur Tabi <timur@kernel.org> Acked-by: Timur Tabi <timur@kernel.org> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Li Yang <leoyang.li@nxp.com>
| | * | serial: ucc_uart: replace ppc-specific IO accessorsRasmus Villemoes2019-12-091-108/+102
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some ARM-based SOCs (e.g. LS1021A) also have a QUICC engine. As preparation for allowing this driver to build on ARM, replace the ppc-specific in_be16() etc. by the qe_io* helpers. Done via coccinelle. Reviewed-by: Timur Tabi <timur@kernel.org> Acked-by: Timur Tabi <timur@kernel.org> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Li Yang <leoyang.li@nxp.com>
| | * | serial: ucc_uart: explicitly include soc/fsl/cpm.hRasmus Villemoes2019-12-091-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This driver uses #defines from soc/fsl/cpm.h, so instead of relying on some other header pulling that in, do that explicitly. This is preparation for allowing this driver to build on ARM. Reviewed-by: Timur Tabi <timur@kernel.org> Acked-by: Timur Tabi <timur@kernel.org> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Li Yang <leoyang.li@nxp.com>
* | | | proc: convert everything to "struct proc_ops"Alexey Dobriyan2020-02-041-4/+4
| |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in seq_file.h. Conversion rule is: llseek => proc_lseek unlocked_ioctl => proc_ioctl xxx => proc_xxx delete ".owner = THIS_MODULE" line [akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c] [sfr@canb.auug.org.au: fix kernel/sched/psi.c] Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge tag 'mips_5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linuxLinus Torvalds2020-01-313-0/+110
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull MIPS changes from Paul Burton: "Nothing too big or scary in here: - Support mremap() for the VDSO, primarily to allow CRIU to restore the VDSO to its checkpointed location. - Restore the MIPS32 cBPF JIT, after having reverted the enablement of the eBPF JIT for MIPS32 systems in the 5.5 cycle. - Improve cop0 counter synchronization behaviour whilst onlining CPUs by running with interrupts disabled. - Better match FPU behaviour when emulating multiply-accumulate instructions on pre-r6 systems that implement IEEE754-2008 style MACs. - Loongson64 kernels now build using the MIPS64r2 ISA, allowing them to take advantage of instructions introduced by r2. - Support for the Ingenic X1000 SoC & the really nice little CU Neo development board that's using it. - Support for WMAC on GARDENA Smart Gateway devices. - Lots of cleanup & refactoring of SGI IP27 (Origin 2*) support in preparation for introducing IP35 (Origin 3*) support. - Various Kconfig & Makefile cleanups" * tag 'mips_5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (60 commits) MIPS: PCI: Add detection of IOC3 on IO7, IO8, IO9 and Fuel MIPS: Loongson64: Disable exec hazard MIPS: Loongson64: Bump ISA level to MIPSR2 MIPS: Make DIEI support as a config option MIPS: OCTEON: octeon-irq: fix spelling mistake "to" -> "too" MIPS: asm: local: add barriers for Loongson MIPS: Loongson64: Select mac2008 only feature MIPS: Add MAC2008 Support Revert "MIPS: Add custom serial.h with BASE_BAUD override for generic kernel" MIPS: sort MIPS and MIPS_GENERIC Kconfig selects alphabetically (again) MIPS: make CPU_HAS_LOAD_STORE_LR opt-out MIPS: generic: don't unconditionally select PINCTRL MIPS: don't explicitly select LIBFDT in Kconfig MIPS: sync-r4k: do slave counter synchronization with disabled HW interrupts MIPS: SGI-IP30: Check for valid pointer before using it MIPS: syscalls: fix indentation of the 'SYSNR' message MIPS: boot: fix typo in 'vmlinux.lzma.its' target MIPS: fix indentation of the 'RELOCS' message dt-bindings: Document loongson vendor-prefix MIPS: CU1000-Neo: Refresh defconfig to support HWMON and WiFi. ...
| * | | mfd: ioc3: Add driver for SGI IOC3 chipThomas Bogendoerfer2020-01-093-0/+110
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SGI IOC3 chip has integrated ethernet, keyboard and mouse interface. It also supports connecting a SuperIO chip for serial and parallel interfaces. IOC3 is used inside various SGI systemboards and add-on cards with different equipped external interfaces. Support for ethernet and serial interfaces were implemented inside the network driver. This patchset moves out the not network related parts to a new MFD driver, which takes care of card detection, setup of platform devices and interrupt distribution for the subdevices. Serial portion: Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org> Network part: Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Network part: Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: Paul Burton <paulburton@kernel.org> Cc: James Hogan <jhogan@kernel.org> Cc: David S. Miller <davem@davemloft.net> Cc: Jiri Slaby <jslaby@suse.com> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org Cc: linux-serial@vger.kernel.org
* | | Merge tag 'tty-5.6-rc1' of ↵Linus Torvalds2020-01-2970-749/+1085
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver updates from Greg KH: "Here are the big set of tty and serial driver updates for 5.6-rc1 Included in here are: - dummy_con cleanups (touches lots of arch code) - sysrq logic cleanups (touches lots of serial drivers) - samsung driver fixes (wasn't really being built) - conmakeshash move to tty subdir out of scripts - lots of small tty/serial driver updates All of these have been in linux-next for a while with no reported issues" * tag 'tty-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (140 commits) tty: n_hdlc: Use flexible-array member and struct_size() helper tty: baudrate: SPARC supports few more baud rates tty: baudrate: Synchronise baud_table[] and baud_bits[] tty: serial: meson_uart: Add support for kernel debugger serial: imx: fix a race condition in receive path serial: 8250_bcm2835aux: Document struct bcm2835aux_data serial: 8250_bcm2835aux: Use generic remapping code serial: 8250_bcm2835aux: Allocate uart_8250_port on stack serial: 8250_bcm2835aux: Suppress register_port error on -EPROBE_DEFER serial: 8250_bcm2835aux: Suppress clk_get error on -EPROBE_DEFER serial: 8250_bcm2835aux: Fix line mismatch on driver unbind serial_core: Remove unused member in uart_port vt: Correct comment documenting do_take_over_console() vt: Delete comment referencing non-existent unbind_con_driver() arch/xtensa/setup: Drop dummy_con initialization arch/x86/setup: Drop dummy_con initialization arch/unicore32/setup: Drop dummy_con initialization arch/sparc/setup: Drop dummy_con initialization arch/sh/setup: Drop dummy_con initialization arch/s390/setup: Drop dummy_con initialization ...
| * | | tty: n_hdlc: Use flexible-array member and struct_size() helperGustavo A. R. Silva2020-01-231-6/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Old code in the kernel uses 1-byte and 0-byte arrays to indicate the presence of a "variable length array": struct something { int length; u8 data[1]; }; struct something *instance; instance = kmalloc(sizeof(*instance) + size, GFP_KERNEL); instance->length = size; memcpy(instance->data, source, size); There is also 0-byte arrays. Both cases pose confusion for things like sizeof(), CONFIG_FORTIFY_SOURCE, etc.[1] Instead, the preferred mechanism to declare variable-length types such as the one above is a flexible array member[2] which need to be the last member of a structure and empty-sized: struct something { int stuff; u8 data[]; }; Also, by making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertenly introduced[3] to the codebase from now on. Lastly, make use of the struct_size() helper to safely calculate the allocation size for instances of struct n_hdlc_buf and avoid any potential type mistakes[4][5]. [1] https://github.com/KSPP/linux/issues/21 [2] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") [4] https://lore.kernel.org/lkml/60e14fb7-8596-e21c-f4be-546ce39e7bdb@embeddedor.com/ [5] commit 553d66cb1e86 ("iommu/vt-d: Use struct_size() helper") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Reviewed-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20200121172138.GA3162@embeddedor Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty: baudrate: SPARC supports few more baud ratesAndy Shevchenko2020-01-221-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to termbits.h SPARC supports few more baud rates than currently defined in tty_baudrate.c. Append supported ones to baud_table[] and baud_bits[]. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20200115224124.74684-2-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty: baudrate: Synchronise baud_table[] and baud_bits[]Andy Shevchenko2020-01-221-15/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Synchronize baud rate tables baud_table and baud_bits with each other for better readability. This makes clear what is being used for SPARC. No functional change intended. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20200115224124.74684-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty: serial: meson_uart: Add support for kernel debuggerJulien Masson2020-01-221-0/+65
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kgdb invokes the poll_put_char and poll_get_char when communicating with the host. This patch implement the serial polling hooks for the meson_uart to be used for KGDB debugging over serial line. Signed-off-by: Julien Masson <jmasson@baylibre.com> Link: https://lore.kernel.org/r/867e1klo48.fsf@julienm-fedora-R90NQGV9.i-did-not-set--mail-host-address--so-tickle-me Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: imx: fix a race condition in receive pathUwe Kleine-König2020-01-221-13/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The main irq handler function starts by first masking disabled interrupts in the status register values to ensure to only handle enabled interrupts. This is important as when the RX path in the hardware is disabled reading the RX fifo results in an external abort. This checking must be done under the port lock, otherwise the following can happen: CPU1 | CPU2 | irq triggers as there are chars | in the RX fifo | | grab port lock imx_uart_int finds RRDY enabled | and calls imx_uart_rxint which | has to wait for port lock | | disable RX (e.g. because we're | using RS485 with !RX_DURING_TX) | | release port lock read from RX fifo with RX | disabled => exception | So take the port lock only once in imx_uart_int() instead of in the functions called from there. Reported-by: Andre Renaud <arenaud@designa-electronics.com> Cc: stable@vger.kernel.org Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20200121071702.20150-1-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: 8250_bcm2835aux: Document struct bcm2835aux_dataLukas Wunner2020-01-221-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Document the driver private data of the BCM2835 auxiliary UART so that upcoming commits may add further members with proper kerneldoc. Signed-off-by: Lukas Wunner <lukas@wunner.de> Reviewed-by: Matthias Brugger <mbrugger@suse.com> Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Link: https://lore.kernel.org/r/aea363c27fd541dba96d2ebfeee4f596c6d34932.1579175223.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: 8250_bcm2835aux: Use generic remapping codeLukas Wunner2020-01-221-5/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On probe the bcm2835aux UART driver misreports the register base address as 0x0: ttyS0 at MMIO 0x0 (irq = 53, base_baud = 50000000) is a 16550 That's because the driver remaps the registers itself. Take advantage of the generic remapping code in serial8250_request_std_resource() to get a message with the correct address and to simplify the driver. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Martin Sperl <kernel@martin.sperl.org> Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Link: https://lore.kernel.org/r/7d1a9bdb05090d8e465fd15cd26d6e81538d07f9.1579175223.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: 8250_bcm2835aux: Allocate uart_8250_port on stackLukas Wunner2020-01-221-18/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The bcm2835aux UART driver stores a struct uart_8250_port in its private data even though it's only passed once to serial8250_register_8250_port() (which copies all relevant data) and becomes obsolete afterwards. Allocate the struct on the stack instead for simplicity and to conserve memory. The driver also initializes a spinlock in the struct which is never used. Drop that as well. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Martin Sperl <kernel@martin.sperl.org> Reviewed-by: Matthias Brugger <mbrugger@suse.com> Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Link: https://lore.kernel.org/r/421d3aed4c34cc8447ac9c26c320961f1b787f11.1579175223.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: 8250_bcm2835aux: Suppress register_port error on -EPROBE_DEFERLukas Wunner2020-01-221-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Suppress a gratuitous error message if serial8250_register_8250_port() returns -EPROBE_DEFER. Signed-off-by: Lukas Wunner <lukas@wunner.de> Reviewed-by: Matthias Brugger <mbrugger@suse.com> Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Link: https://lore.kernel.org/r/6aea0eacf3bfa73fe2d81082cc723265413410c8.1579175223.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: 8250_bcm2835aux: Suppress clk_get error on -EPROBE_DEFERPhil Elwell2020-01-221-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Suppress a gratuitous error message if devm_clk_get() returns -EPROBE_DEFER. Signed-off-by: Phil Elwell <phil@raspberrypi.org> [lukas: extend commit message] Signed-off-by: Lukas Wunner <lukas@wunner.de> Reviewed-by: Matthias Brugger <mbrugger@suse.com> Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Link: https://lore.kernel.org/r/deafc13cdfd7a31c6a81b0db95adcd3599accc26.1579175223.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: 8250_bcm2835aux: Fix line mismatch on driver unbindLukas Wunner2020-01-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Unbinding the bcm2835aux UART driver raises the following error if the maximum number of 8250 UARTs is set to 1 (via the 8250.nr_uarts module parameter or CONFIG_SERIAL_8250_RUNTIME_UARTS): (NULL device *): Removing wrong port: a6f80333 != fa20408b That's because bcm2835aux_serial_probe() retrieves UART line number 1 from the devicetree and stores it in data->uart.port.line, while serial8250_register_8250_port() instead uses UART line number 0, which is stored in data->line. On driver unbind, bcm2835aux_serial_remove() uses data->uart.port.line, which contains the wrong number. Fix it. The issue does not occur if the maximum number of 8250 UARTs is >= 2. Fixes: bdc5f3009580 ("serial: bcm2835: add driver for bcm2835-aux-uart") Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: stable@vger.kernel.org # v4.6+ Cc: Martin Sperl <kernel@martin.sperl.org> Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Link: https://lore.kernel.org/r/912ccf553c5258135c6d7e8f404a101ef320f0f4.1579175223.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | vt: Correct comment documenting do_take_over_console()Lukas Wunner2020-01-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 3e795de7631b ("[PATCH] VT binding: Add binding/unbinding support for the VT console") introduced a code comment claiming that "do_take_over_console is basically a register followed by unbind". However the function actually performs a register followed by *bind*. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Antonino A. Daplas <adaplas@gmail.com> Link: https://lore.kernel.org/r/a500f005ba7013ca8165a6d42f59b2183d56114f.1578574427.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | vt: Delete comment referencing non-existent unbind_con_driver()Lukas Wunner2020-01-141-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit c1f5e38a5d35 ("vt: delete unneeded function unbind_con_driver") removed unbind_con_driver() but retained a comment referencing the function. Delete it. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Wang YanQing <udknight@gmail.com> Link: https://lore.kernel.org/r/4d77a67d77a1c699e9a6cc3e73044c31c02d60b5.1578574427.git.lukas@wunner.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | vt: Initialize conswitchp to dummy_con if unsetArvind Sankar2020-01-141-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the arch setup code hasn't initialized conswitchp yet, set it to dummy_con in con_init. This will allow us to drop the dummy_con initialization that's done in almost every architecture. Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu> Link: https://lore.kernel.org/r/20191218214506.49252-3-nivedita@alum.mit.edu Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty: synclink_gt: Adjust indentation in several functionsNathan Chancellor2020-01-141-9/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clang warns: ../drivers/tty/synclink_gt.c:1337:3: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] if (C_CRTSCTS(tty)) { ^ ../drivers/tty/synclink_gt.c:1335:2: note: previous statement is here if (I_IXOFF(tty)) ^ ../drivers/tty/synclink_gt.c:2563:3: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) ^ ../drivers/tty/synclink_gt.c:2561:2: note: previous statement is here if (I_INPCK(info->port.tty)) ^ ../drivers/tty/synclink_gt.c:3221:3: warning: misleading indentation; statement is not part of the previous 'else' [-Wmisleading-indentation] set_signals(info); ^ ../drivers/tty/synclink_gt.c:3219:2: note: previous statement is here else ^ 3 warnings generated. The indentation on these lines is not at all consistent, tabs and spaces are mixed together. Convert to just using tabs to be consistent with the Linux kernel coding style and eliminate these warnings from clang. Link: https://github.com/ClangBuiltLinux/linux/issues/822 Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Link: https://lore.kernel.org/r/20191218023912.13827-1-natechancellor@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty: synclinkmp: Adjust indentation in several functionsNathan Chancellor2020-01-141-12/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clang warns: ../drivers/tty/synclinkmp.c:1456:3: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] if (C_CRTSCTS(tty)) { ^ ../drivers/tty/synclinkmp.c:1453:2: note: previous statement is here if (I_IXOFF(tty)) ^ ../drivers/tty/synclinkmp.c:2473:8: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] info->port.tty->hw_stopped = 0; ^ ../drivers/tty/synclinkmp.c:2471:7: note: previous statement is here if ( debug_level >= DEBUG_LEVEL_ISR ) ^ ../drivers/tty/synclinkmp.c:2482:8: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] info->port.tty->hw_stopped = 1; ^ ../drivers/tty/synclinkmp.c:2480:7: note: previous statement is here if ( debug_level >= DEBUG_LEVEL_ISR ) ^ ../drivers/tty/synclinkmp.c:2809:3: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) ^ ../drivers/tty/synclinkmp.c:2807:2: note: previous statement is here if (I_INPCK(info->port.tty)) ^ ../drivers/tty/synclinkmp.c:3246:3: warning: misleading indentation; statement is not part of the previous 'else' [-Wmisleading-indentation] set_signals(info); ^ ../drivers/tty/synclinkmp.c:3244:2: note: previous statement is here else ^ 5 warnings generated. The indentation on these lines is not at all consistent, tabs and spaces are mixed together. Convert to just using tabs to be consistent with the Linux kernel coding style and eliminate these warnings from clang. Link: https://github.com/ClangBuiltLinux/linux/issues/823 Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Link: https://lore.kernel.org/r/20191218024720.3528-1-natechancellor@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: xilinx_uartps: set_mctrl sets RTS and DTRMaarten Brock2020-01-141-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | set_mctrl now sets RTS and DTR. Signed-off-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/1574687731-21563-3-git-send-email-shubhrajyoti.datta@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: xilinx_uartps: set_termios sets flowcontrolMaarten Brock2020-01-141-5/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let set_termios enable/disable automatic flow control. set_mctrl should not touch automatic flow control. Signed-off-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/1574687731-21563-2-git-send-email-shubhrajyoti.datta@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: xilinx_uartps: Let get_mctrl return statusMaarten Brock2020-01-141-3/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some of the applications like microcom do not work if modem is disabled. To fix them we always return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR instead of 0 when using cts_override. Make get_mctrl return actual status when not using cts_override. Signed-off-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/1574687731-21563-1-git-send-email-shubhrajyoti.datta@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty/serial: 8250_exar: use true,false for bool variableZheng Bin2020-01-141-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes coccicheck warning: drivers/tty/serial/8250/8250_exar.c:189:6-17: WARNING: Assignment of 0/1 to bool variable drivers/tty/serial/8250/8250_exar.c:197:3-14: WARNING: Assignment of 0/1 to bool variable drivers/tty/serial/8250/8250_exar.c:199:3-14: WARNING: Assignment of 0/1 to bool variable Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zheng Bin <zhengbin13@huawei.com> Link: https://lore.kernel.org/r/1578881777-65475-5-git-send-email-zhengbin13@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty/serial: atmel: use true,false for bool variableZheng Bin2020-01-141-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes coccicheck warning: drivers/tty/serial/atmel_serial.c:1062:1-23: WARNING: Assignment of 0/1 to bool variable drivers/tty/serial/atmel_serial.c:1261:1-23: WARNING: Assignment of 0/1 to bool variable drivers/tty/serial/atmel_serial.c:1688:3-25: WARNING: Assignment of 0/1 to bool variable Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zheng Bin <zhengbin13@huawei.com> Link: https://lore.kernel.org/r/1578881777-65475-4-git-send-email-zhengbin13@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty/serial: kgdb_nmi: use true,false for bool variableZheng Bin2020-01-141-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes coccicheck warning: drivers/tty/serial/kgdb_nmi.c:121:6-13: WARNING: Assignment of 0/1 to bool variable drivers/tty/serial/kgdb_nmi.c:133:2-9: WARNING: Assignment of 0/1 to bool variable Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zheng Bin <zhengbin13@huawei.com> Link: https://lore.kernel.org/r/1578881777-65475-3-git-send-email-zhengbin13@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty: synclink_gt: use true,false for bool variableZheng Bin2020-01-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes coccicheck warning: drivers/tty/synclink_gt.c:2101:3-19: WARNING: Assignment of 0/1 to bool variable Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zheng Bin <zhengbin13@huawei.com> Link: https://lore.kernel.org/r/1578881777-65475-2-git-send-email-zhengbin13@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty: serial: msm_serial: RX SW/FIFO mode fallbackLoic Poulain2020-01-141-1/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During db410c stress test and when the system is low on memory, the UART/console becomes unresponsive and never recover back. This has been narrowed down to the msm_start_rx_dma which does not manage error cases correctly (e.g. dma mapping failure), indeed, when an error happens, dma transfer is simply discarded and so never completed, leading to unconfigured RX path. This patch fixes this issue by switching to SW/FIFO mode in case of DMA issue. This mainly consists in resetting the receiver to apply RX BAM/DMA disabling change and re-enabling the RX level and stale interrupts (previously disabled for DMA transfers). The DMA will be re-enabled once memory is available since the SW/FIFO read function (msm_handle_rx_dm) retries to start dma on completion. Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Link: https://lore.kernel.org/r/1578646684-17379-1-git-send-email-loic.poulain@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | serial: 8250: Support disabling mdelay-filled probes of 16550A variantsJosh Triplett2020-01-142-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 8250 driver can probe for many variants of the venerable 16550A serial port. Some of those probes involve long (20ms) mdelay calls, which delay system boot. Modern systems and virtual machines don't have those variants. Provide a Kconfig option to disable probes for 16550A variants. Disabling this speeds up the boot of a virtual machine with a serial console by more than 20ms (a substantial fraction of the ~100ms needed to boot a carefully configured VM). Before: [ +0.021919] 00:04: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A After: [ +0.000097] 00:04: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A Signed-off-by: Josh Triplett <josh@joshtriplett.org> Link: https://lore.kernel.org/r/20200111022513.GA166267@localhost Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty: serial: tegra: Optimize DMA buffer synchronizationDmitry Osipenko2020-01-141-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Synchronize only the dirty part of DMA buffer in order to avoid unnecessary overhead of syncing of the clean part, which is the case of every serial DMA transfer in practice. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Link: https://lore.kernel.org/r/20200112180919.5194-3-digetx@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | tty: serial: tegra: Activate RX DMA transfer by requestDmitry Osipenko2020-01-141-32/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This allows DMA engine to go into runtime-suspended mode whenever there is no data to receive, instead of keeping DMA active all the time while TTY is opened (i.e. permanently active in practice, like in the case of UART Bluetooth). Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Link: https://lore.kernel.org/r/20200112180919.5194-2-digetx@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | Merge 5.5-rc6 into tty-nextGreg Kroah-Hartman2020-01-132-2/+11
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | We need the serial/tty fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | tty/serial: atmel: RS485 & ISO7816: wait for TXRDY before sending dataCodrin.Ciubotariu@microchip.com2020-01-101-7/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At this moment, TXEMPTY is checked before sending data on RS485 and ISO7816 modes. However, TXEMPTY is risen when FIFO (if used) or the Transmit Shift Register are empty, even though TXRDY might be up and controller is able to receive data. Since the controller sends data only when TXEMPTY is ready, on RS485, when DMA is not used, the RTS pin is driven low after each byte. With this patch, the characters will be transmitted when TXRDY is up and so, RTS pin will remain high between bytes. The performance improvement on RS485 is about 8% with a baudrate of 300. Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> Acked-by: Richard Genoud <richard.genoud@gmail.com> Link: https://lore.kernel.org/r/20200107111656.26308-1-codrin.ciubotariu@microchip.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | serial_core: Move sysrq functions from header fileDmitry Safonov2020-01-101-0/+83
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's not worth to have them in every serial driver and I'm about to add another helper function. Signed-off-by: Dmitry Safonov <dima@arista.com> Link: https://lore.kernel.org/r/20200109215444.95995-2-dima@arista.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | tty: st-asc: switch to using devm_gpiod_get()Dmitry Torokhov2020-01-101-7/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The node pointer in question is not a child node, but the node assigned to the port device itself, so we should not be using devm_fwnode_get_gpiod_from_child() [that is going away], but standard devm_gpiod_get(). To maintain the previous labeling we use gpiod_set_consumer_name() after we acquire the GPIO. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Link: https://lore.kernel.org/r/20200104202314.GA13591@dtor-ws Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | tty: serial: Kconfig: Allow SERIAL_QCOM_GENI_CONSOLE to be enabled if ↵John Stultz2020-01-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SERIAL_QCOM_GENI is a module In order to support having SERIAL_QCOM_GENI as a module while also still preserving serial console support, tweak the Kconfig requirements to not require =y Cc: Todd Kjos <tkjos@google.com> Cc: Alistair Delva <adelva@google.com> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: linux-serial@vger.kernel.org Signed-off-by: John Stultz <john.stultz@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20200107010311.58584-2-john.stultz@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | tty: serial_core: Export uart_console_device so it can be used by modulesJohn Stultz2020-01-101-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to support serial console w/ SERIAL_QCOM_GENI=m, we need to export the uart_console_device() symbol so things will build Cc: Todd Kjos <tkjos@google.com> Cc: Alistair Delva <adelva@google.com> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: linux-serial@vger.kernel.org Signed-off-by: John Stultz <john.stultz@linaro.org> Link: https://lore.kernel.org/r/20200107010311.58584-1-john.stultz@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | tty: serial: fsl_lpuart: drop earlycon entry for i.MX8QXPPeng Fan2020-01-061-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | i.MX8QXP lpuart is compatible with i.MX7ULP, so no need an extra entry for i.MX8QXP. Signed-off-by: Peng Fan <peng.fan@nxp.com> Link: https://lore.kernel.org/r/1576822230-23125-4-git-send-email-peng.fan@nxp.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 14:33:49 +0000