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path: root/drivers/tty/serial
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2017-06-26serial: efm32: Fix parity management in 'efm32_uart_console_get_options()'Christophe JAILLET
commit be40597a1bc173bf9dadccdf5388b956f620ae8f upstream. UARTn_FRAME_PARITY_ODD is 0x0300 UARTn_FRAME_PARITY_EVEN is 0x0200 So if the UART is configured for EVEN parity, it would be reported as ODD. Fix it by correctly testing if the 2 bits are set. Fixes: 3afbd89c9639 ("serial/efm32: add new driver") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-14serial: sh-sci: Fix panic when serial console and DMA are enabledTakatoshi Akiyama
commit 3c9101766b502a0163d1d437fada5801cf616be2 upstream. This patch fixes an issue that kernel panic happens when DMA is enabled and we press enter key while the kernel booting on the serial console. * An interrupt may occur after sci_request_irq(). * DMA transfer area is initialized by setup_timer() in sci_request_dma() and used in interrupt. If an interrupt occurred between sci_request_irq() and setup_timer() in sci_request_dma(), DMA transfer area has not been initialized yet. So, this patch changes the order of sci_request_irq() and sci_request_dma(). Fixes: 73a19e4c0301 ("serial: sh-sci: Add DMA support.") Signed-off-by: Takatoshi Akiyama <takatoshi.akiyama.kj@ps.hitachi-solutions.com> [Shimoda changes the commit log] Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Cc: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-14serial: ifx6x60: fix use-after-free on module unloadJohan Hovold
commit 1e948479b3d63e3ac0ecca13cbf4921c7d17c168 upstream. Make sure to deregister the SPI driver before releasing the tty driver to avoid use-after-free in the SPI remove callback where the tty devices are deregistered. Fixes: 72d4724ea54c ("serial: ifx6x60: Add modem power off function in the platform reboot process") Cc: Jun Chen <jun.d.chen@intel.com> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-20serial: omap: suspend device on probe errorsJohan Hovold
commit 77e6fe7fd2b7cba0bf2f2dc8cde51d7b9a35bf74 upstream. Make sure to actually suspend the device before returning after a failed (or deferred) probe. Note that autosuspend must be disabled before runtime pm is disabled in order to balance the usage count due to a negative autosuspend delay as well as to make the final put suspend the device synchronously. Fixes: 388bc2622680 ("omap-serial: Fix the error handling in the omap_serial probe") Cc: Shubhrajyoti D <shubhrajyoti@ti.com> Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-20serial: omap: fix runtime-pm handling on unbindJohan Hovold
commit 099bd73dc17ed77aa8c98323e043613b6e8f54fc upstream. An unbalanced and misplaced synchronous put was used to suspend the device on driver unbind, something which with a likewise misplaced pm_runtime_disable leads to external aborts when an open port is being removed. Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa024010 ... [<c046e760>] (serial_omap_set_mctrl) from [<c046a064>] (uart_update_mctrl+0x50/0x60) [<c046a064>] (uart_update_mctrl) from [<c046a400>] (uart_shutdown+0xbc/0x138) [<c046a400>] (uart_shutdown) from [<c046bd2c>] (uart_hangup+0x94/0x190) [<c046bd2c>] (uart_hangup) from [<c045b760>] (__tty_hangup+0x404/0x41c) [<c045b760>] (__tty_hangup) from [<c045b794>] (tty_vhangup+0x1c/0x20) [<c045b794>] (tty_vhangup) from [<c046ccc8>] (uart_remove_one_port+0xec/0x260) [<c046ccc8>] (uart_remove_one_port) from [<c046ef4c>] (serial_omap_remove+0x40/0x60) [<c046ef4c>] (serial_omap_remove) from [<c04845e8>] (platform_drv_remove+0x34/0x4c) Fix this up by resuming the device before deregistering the port and by suspending and disabling runtime pm only after the port has been removed. Also make sure to disable autosuspend before disabling runtime pm so that the usage count is balanced and device actually suspended before returning. Note that due to a negative autosuspend delay being set in probe, the unbalanced put would actually suspend the device on first driver unbind, while rebinding and again unbinding would result in a negative power.usage_count. Fixes: 7e9c8e7dbf3b ("serial: omap: make sure to suspend device before remove") Cc: Felipe Balbi <balbi@kernel.org> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-20serial: samsung: Use right device for DMA-mapping callsMarek Szyprowski
commit 768d64f491a530062ddad50e016fb27125f8bd7c upstream. Driver should provide its own struct device for all DMA-mapping calls instead of extracting device pointer from DMA engine channel. Although this is harmless from the driver operation perspective on ARM architecture, it is always good to use the DMA mapping API in a proper way. This patch fixes following DMA API debug warning: WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:1241 check_sync+0x520/0x9f4 samsung-uart 12c20000.serial: DMA-API: device driver tries to sync DMA memory it has not allocated [device address=0x000000006df0f580] [size=64 bytes] Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.11.0-rc1-00137-g07ca963 #51 Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [<c011aaa4>] (unwind_backtrace) from [<c01127c0>] (show_stack+0x20/0x24) [<c01127c0>] (show_stack) from [<c06ba5d8>] (dump_stack+0x84/0xa0) [<c06ba5d8>] (dump_stack) from [<c0139528>] (__warn+0x14c/0x180) [<c0139528>] (__warn) from [<c01395a4>] (warn_slowpath_fmt+0x48/0x50) [<c01395a4>] (warn_slowpath_fmt) from [<c0729058>] (check_sync+0x520/0x9f4) [<c0729058>] (check_sync) from [<c072967c>] (debug_dma_sync_single_for_device+0x88/0xc8) [<c072967c>] (debug_dma_sync_single_for_device) from [<c0803c10>] (s3c24xx_serial_start_tx_dma+0x100/0x2f8) [<c0803c10>] (s3c24xx_serial_start_tx_dma) from [<c0804338>] (s3c24xx_serial_tx_chars+0x198/0x33c) Reported-by: Seung-Woo Kim <sw0312.kim@samsung.com> Fixes: 62c37eedb74c8 ("serial: samsung: add dma reqest/release functions") Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-14serial: 8250_omap: Fix probe and remove for PM runtimeTony Lindgren
commit 4e0f5cc65098ea32a1e77baae74215b9bd5276b1 upstream. Otherwise the interconnect related code implementing PM runtime will produce these errors on a failed probe: omap_uart 48066000.serial: omap_device: omap_device_enable() called from invalid state 1 omap_uart 48066000.serial: use pm_runtime_put_sync_suspend() in driver? Note that we now also need to check for priv in omap8250_runtime_suspend() as it has not yet been registered if probe fails. And we need to use pm_runtime_put_sync() to properly idle the device like we already do in omap8250_remove(). Fixes: 61929cf0169d ("tty: serial: Add 8250-core based omap driver") Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-088250_pci: Fix potential use-after-free in error pathGabriel Krisman Bertazi
commit c130b666a9a711f985a0a44b58699ebe14bb7245 upstream. Commit f209fa03fc9d ("serial: 8250_pci: Detach low-level driver during PCI error recovery") introduces a potential use-after-free in case the pciserial_init_ports call in serial8250_io_resume fails, which may happen if a memory allocation fails or if the .init quirk failed for whatever reason). If this happen, further pci_get_drvdata will return a pointer to freed memory. This patch reworks the PCI recovery resume hook to restore the old priv structure in this case, which should be ok, since the ports were already detached. Such error during recovery causes us to give up on the recovery. Fixes: f209fa03fc9d ("serial: 8250_pci: Detach low-level driver during PCI error recovery") Reported-by: Michal Suchanek <msuchanek@suse.com> Signed-off-by: Gabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-21tty/serial: atmel: RS485 half duplex w/DMA: enable RX after TX is doneRichard Genoud
commit b389f173aaa1204d6dc1f299082a162eb0491545 upstream. When using RS485 in half duplex, RX should be enabled when TX is finished, and stopped when TX starts. Before commit 0058f0871efe7b01c6 ("tty/serial: atmel: fix RS485 half duplex with DMA"), RX was not disabled in atmel_start_tx() if the DMA was used. So, collisions could happened. But disabling RX in atmel_start_tx() uncovered another bug: RX was enabled again in the wrong place (in atmel_tx_dma) instead of being enabled when TX is finished (in atmel_complete_tx_dma), so the transmission simply stopped. This bug was not triggered before commit 0058f0871efe7b01c6 ("tty/serial: atmel: fix RS485 half duplex with DMA") because RX was never disabled before. Moving atmel_start_rx() in atmel_complete_tx_dma() corrects the problem. Reported-by: Gil Weber <webergil@gmail.com> Fixes: 0058f0871efe7b01c6 Tested-by: Gil Weber <webergil@gmail.com> Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Tested-by: Bryan Evenson <bevenson@melinkcorp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-08tty/serial: atmel: fix TX path in atmel_console_write()Nicolas Ferre
commit 497e1e16f45c70574dc9922c7f75c642c2162119 upstream. A side effect of 89d8232411a8 ("tty/serial: atmel_serial: BUG: stop DMA from transmitting in stop_tx") is that the console can be called with TX path disabled. Then the system would hang trying to push charecters out in atmel_console_putchar(). Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Fixes: 89d8232411a8 ("tty/serial: atmel_serial: BUG: stop DMA from transmitting in stop_tx") Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-08tty/serial: atmel: fix race condition (TX+DMA)Richard Genoud
commit 31ca2c63fdc0aee725cbd4f207c1256f5deaabde upstream. If uart_flush_buffer() is called between atmel_tx_dma() and atmel_complete_tx_dma(), the circular buffer has been cleared, but not atmel_port->tx_len. That leads to a circular buffer overflow (dumping (UART_XMIT_SIZE - atmel_port->tx_len) bytes). Tested-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-30serial: 8250_pci: Detach low-level driver during PCI error recoverySumit Semwal
From: Gabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> [ Upstream commit f209fa03fc9d131b3108c2e4936181eabab87416 ] During a PCI error recovery, like the ones provoked by EEH in the ppc64 platform, all IO to the device must be blocked while the recovery is completed. Current 8250_pci implementation only suspends the port instead of detaching it, which doesn't prevent incoming accesses like TIOCMGET and TIOCMSET calls from reaching the device. Those end up racing with the EEH recovery, crashing it. Similar races were also observed when opening the device and when shutting it down during recovery. This patch implements a more robust IO blockage for the 8250_pci recovery by unregistering the port at the beginning of the procedure and re-adding it afterwards. Since the port is detached from the uart layer, we can be sure that no request will make through to the device during recovery. This is similar to the solution used by the JSM serial driver. I thank Peter Hurley <peter@hurleysoftware.com> for valuable input on this one over one year ago. Signed-off-by: Gabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-18serial: samsung: Continue to work if DMA request failsKrzysztof Kozlowski
commit f98c7bce570bdbe344b74ff5daa7dfeef3f22929 upstream. If DMA is not available (even when configured in DeviceTree), the driver will fail the startup procedure thus making serial console not available. For example this causes boot failure on QEMU ARMv7 (Exynos4210, SMDKC210): [    1.302575] OF: amba_device_add() failed (-19) for /amba/pdma@12680000 ... [   11.435732] samsung-uart 13800000.serial: DMA request failed [   72.963893] samsung-uart 13800000.serial: DMA request failed [   73.143361] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000000 DMA is not necessary for serial to work, so continue with UART startup after emitting a warning. Fixes: 62c37eedb74c ("serial: samsung: add dma reqest/release functions") Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-15serial: 8250_pci: Add MKS Tenta SCOM-0800 and SCOM-0801 cardsIan Abbott
commit 1c9c858e2ff8ae8024a3d75d2ed080063af43754 upstream. The MKS Instruments SCOM-0800 and SCOM-0801 cards (originally by Tenta Technologies) are 3U CompactPCI serial cards with 4 and 8 serial ports, respectively. The first 4 ports are implemented by an OX16PCI954 chip, and the second 4 ports are implemented by an OX16C954 chip on a local bus, bridged by the second PCI function of the OX16PCI954. The ports are jumper-selectable as RS-232 and RS-422/485, and the UARTs use a non-standard oscillator frequency of 20 MHz (base_baud = 1250000). Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-26tty: serial: msm: Fix module autoloadJavier Martinez Canillas
commit abe81f3b8ed2996e1712d26d38ff6b73f582c616 upstream. If the driver is built as a module, autoload won't work because the module alias information is not filled. So user-space can't match the registered device with the corresponding module. Export the module alias information using the MODULE_DEVICE_TABLE() macro. Before this patch: $ modinfo drivers/tty/serial/msm_serial.ko | grep alias $ After this patch: $ modinfo drivers/tty/serial/msm_serial.ko | grep alias alias: of:N*T*Cqcom,msm-uartdmC* alias: of:N*T*Cqcom,msm-uartdm alias: of:N*T*Cqcom,msm-uartC* alias: of:N*T*Cqcom,msm-uart Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-19tty/serial: atmel_serial: BUG: stop DMA from transmitting in stop_txRichard Genoud
commit 89d8232411a85b9a6b12fd5da4d07d8a138a8e0c upstream. If we don't disable the transmitter in atmel_stop_tx, the DMA buffer continues to send data until it is emptied. This cause problems with the flow control (CTS is asserted and data are still sent). So, disabling the transmitter in atmel_stop_tx is a sane thing to do. Tested on at91sam9g35-cm(DMA) Tested for regressions on sama5d2-xplained(Fifo) and at91sam9g20ek(PDC) Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-09sc16is7xx: Drop bogus use of IRQF_ONESHOTJosh Cartwright
commit 04da73803c05dc1150ccc31cbf93e8cd56679c09 upstream. The use of IRQF_ONESHOT when registering an interrupt handler with request_irq() is non-sensical. Not only that, it also prevents the handler from being threaded when it otherwise should be w/ IRQ_FORCED_THREADING is enabled. This causes the following deadlock observed by Sean Nyekjaer on -rt: Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM [..] rt_spin_lock_slowlock from queue_kthread_work queue_kthread_work from sc16is7xx_irq sc16is7xx_irq [sc16is7xx] from handle_irq_event_percpu handle_irq_event_percpu from handle_irq_event handle_irq_event from handle_level_irq handle_level_irq from generic_handle_irq generic_handle_irq from mxc_gpio_irq_handler mxc_gpio_irq_handler from mx3_gpio_irq_handler mx3_gpio_irq_handler from generic_handle_irq generic_handle_irq from __handle_domain_irq __handle_domain_irq from gic_handle_irq gic_handle_irq from __irq_svc __irq_svc from rt_spin_unlock rt_spin_unlock from kthread_worker_fn kthread_worker_fn from kthread kthread from ret_from_fork Fixes: 9e6f4ca3e567 ("sc16is7xx: use kthread_worker for tx_work and irq") Reported-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk> Signed-off-by: Josh Cartwright <joshc@ni.com> Cc: linux-rt-users@vger.kernel.org Cc: Jakub Kicinski <moorray3@wp.pl> Cc: linux-serial@vger.kernel.org Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Julia Cartwright <julia@ni.com> Acked-by: Jakub Kicinski <kubakici@wp.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-21sparc: serial: sunhv: fix a double lock bugDan Carpenter
[ Upstream commit 344e3c7734d5090b148c19ac6539b8947fed6767 ] We accidentally take the "port->lock" twice in a row. This old code was supposed to be deleted. Fixes: e58e241c1788 ('sparc: serial: Clean up the locking for -rt') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-18tty/serial: at91: fix hardware handshake on Atmel platformsRichard Genoud
commit 9bcffe7575b721d7b6d9b3090fe18809d9806e78 upstream. After commit 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when hardware handshake is enabled"), the hardware handshake wasn't functional anymore on Atmel platforms (beside SAMA5D2). To understand why, one has to understand the flag ATMEL_US_USMODE_HWHS first: Before commit 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when hardware handshake is enabled"), this flag was never set. Thus, the CTS/RTS where only handled by serial_core (and everything worked just fine). This commit introduced the use of the ATMEL_US_USMODE_HWHS flag, enabling it for all boards when the user space enables flow control. When the ATMEL_US_USMODE_HWHS is set, the Atmel USART controller handles a part of the flow control job: - disable the transmitter when the CTS pin gets high. - drive the RTS pin high when the DMA buffer transfer is completed or PDC RX buffer full or RX FIFO is beyond threshold. (depending on the controller version). NB: This feature is *not* mandatory for the flow control to work. (Nevertheless, it's very useful if low latencies are needed.) Now, the specifics of the ATMEL_US_USMODE_HWHS flag: - For platforms with DMAC and no FIFOs (sam9x25, sam9x35, sama5D3, sama5D4, sam9g15, sam9g25, sam9g35)* this feature simply doesn't work. ( source: https://lkml.org/lkml/2016/9/7/598 ) Tested it on sam9g35, the RTS pins always stays up, even when RXEN=1 or a new DMA transfer descriptor is set. => ATMEL_US_USMODE_HWHS must not be used for those platforms - For platforms with a PDC (sam926{0,1,3}, sam9g10, sam9g20, sam9g45, sam9g46)*, there's another kind of problem. Once the flag ATMEL_US_USMODE_HWHS is set, the RTS pin can't be driven anymore via RTSEN/RTSDIS in USART Control Register. The RTS pin can only be driven by enabling/disabling the receiver or setting RCR=RNCR=0 in the PDC (Receive (Next) Counter Register). => Doing this is beyond the scope of this patch and could add other bugs, so the original (and working) behaviour should be set for those platforms (meaning ATMEL_US_USMODE_HWHS flag should be unset). - For platforms with a FIFO (sama5d2)*, the RTS pin is driven according to the RX FIFO thresholds, and can be also driven by RTSEN/RTSDIS in USART Control Register. No problem here. (This was the use case of commit 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when hardware handshake is enabled")) NB: If the CTS pin declared as a GPIO in the DTS, (for instance cts-gpios = <&pioA PIN_PB31 GPIO_ACTIVE_LOW>), the transmitter will be disabled. => ATMEL_US_USMODE_HWHS flag can be set for this platform ONLY IF the CTS pin is not a GPIO. So, the only case when ATMEL_US_USMODE_HWHS can be enabled is when (atmel_use_fifo(port) && !mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_CTS)) Tested on all Atmel USART controller flavours: AT91SAM9G35-CM (DMAC flavour), AT91SAM9G20-EK (PDC flavour), SAMA5D2xplained (FIFO flavour). * the list may not be exhaustive Fixes: 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when hardware handshake is enabled") Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> [nicolas.ferre@atmel.com: adapt to 4.4.x kernel for stable by adding the atmel_port variable declaration which was missing] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-22serial: 8250_dw: Check the data->pclk when get apb_pclkKefeng Wang
commit e16b46f190a22587898b331f9d58583b0b166c9a upstream. It should check the data->pclk, not data->clk when get apb_pclk. Fixes: c8ed99d4f6a8("serial: 8250_dw: Add support for deferred probing") Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-24serial: 8250: added acces i/o products quad and octal serial cardsJimi Damon
commit c8d192428f52f244130b84650ad616df09f2b1e1 upstream. Added devices ids for acces i/o products quad and octal serial cards that make use of existing Pericom PI7C9X7954 and PI7C9X7958 configurations . Signed-off-by: Jimi Damon <jdamon@accesio.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-24serial: 8250_mid: fix divide error bug if baud rate is 0Andy Shevchenko
commit 47b34d2ef266e2c283b514d65c8963c2ccd42474 upstream. Since the commit c1a67b48f6a5 ("serial: 8250_pci: replace switch-case by formula for Intel MID"), the 8250 driver crashes in the byt_set_termios() function with a divide error. This is caused by the fact that a baud rate of 0 (B0) is not handled properly. Fix it by falling back to B9600 in this case. Reported-by: "Mendez Salinas, Fernando" <fernando.mendez.salinas@intel.com> Fixes: c1a67b48f6a5 ("serial: 8250_pci: replace switch-case by formula for Intel MID") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-20tty/serial: atmel: fix RS485 half duplex with DMAAlexandre Belloni
commit 0058f0871efe7b01c6f2b3046c68196ab73e96da upstream. When using DMA, half duplex doesn't work properly because rx is not stopped before starting tx. Ensure we call atmel_stop_rx() in the DMA case. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-20serial: samsung: Fix ERR pointer dereference on deferred probeKrzysztof Kozlowski
commit e51e4d8a185de90424b03f30181b35f29c46a25a upstream. When the clk_get() of "uart" clock returns EPROBE_DEFER, the next re-probe finishes with success but uses invalid (ERR_PTR) values. This leads to dereferencing of ERR_PTR stored under ourport->clk: 12c30000.serial: Controller clock not found (...) 12c30000.serial: ttySAC3 at MMIO 0x12c30000 (irq = 61, base_baud = 0) is a S3C6400/10 Unable to handle kernel paging request at virtual address fffffdfb (clk_prepare) from [<c039f7d0>] (s3c24xx_serial_pm+0x20/0x128) (s3c24xx_serial_pm) from [<c0395414>] (uart_change_pm+0x38/0x40) (uart_change_pm) from [<c039689c>] (uart_add_one_port+0x31c/0x44c) (uart_add_one_port) from [<c03a035c>] (s3c24xx_serial_probe+0x2a8/0x418) (s3c24xx_serial_probe) from [<c03ee110>] (platform_drv_probe+0x50/0xb0) (platform_drv_probe) from [<c03ecb44>] (driver_probe_device+0x1f4/0x2b0) (driver_probe_device) from [<c03eb0c0>] (bus_for_each_drv+0x44/0x8c) (bus_for_each_drv) from [<c03ec8c8>] (__device_attach+0x9c/0x100) (__device_attach) from [<c03ebf54>] (bus_probe_device+0x84/0x8c) (bus_probe_device) from [<c03ec388>] (deferred_probe_work_func+0x60/0x8c) (deferred_probe_work_func) from [<c012fee4>] (process_one_work+0x120/0x328) (process_one_work) from [<c0130150>] (worker_thread+0x2c/0x4ac) (worker_thread) from [<c0135320>] (kthread+0xd8/0xf4) (kthread) from [<c0107978>] (ret_from_fork+0x14/0x3c) The first unsuccessful clk_get() causes s3c24xx_serial_init_port() to exit with failure but the s3c24xx_uart_port is left half-configured (e.g. port->mapbase is set, clk contains ERR_PTR). On next re-probe, the function s3c24xx_serial_init_port() will exit early with success because of configured port->mapbase and driver will use old values, including the ERR_PTR as clock. Fix this by cleaning the port->mapbase on error path so each re-probe will initialize all of the port settings. Fixes: 60e93575476f ("serial: samsung: enable clock before clearing pending interrupts during init") Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com> Tested-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-20tty: serial: msm: Don't read off end of tx fifoBjorn Andersson
commit 30acf549ca1e81859a67590ab9ecfce3d1050a0b upstream. For dm uarts in pio mode tx data is transferred to the fifo register 4 bytes at a time, but care is not taken when these 4 bytes spans the end of the xmit buffer so the loop might read up to 3 bytes past the buffer and then skip the actual data at the beginning of the buffer. Fix this by, analogous to the DMA case, make sure the chunk doesn't wrap the xmit buffer. Fixes: 3a878c430fd6 ("tty: serial: msm: Add TX DMA support") Cc: Ivan Ivanov <iivanov.xz@gmail.com> Reported-by: Frank Rowand <frowand.list@gmail.com> Reported-by: Nicolas Dechesne <nicolas.dechesne@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Acked-by: Andy Gross <andy.gross@linaro.org> Tested-by: Frank Rowand <frank.rowand@am.sony.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-07QE-UART: add "fsl,t1040-ucc-uart" to of_device_idZhao Qiang
commit 11ca2b7ab432eb90906168c327733575e68d388f upstream. New bindings use "fsl,t1040-ucc-uart" as the compatible for qe-uart. So add it. Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01serial: samsung: Reorder the sequence of clock control when call ↵Chanwoo Choi
s3c24xx_serial_set_termios() commit b8995f527aac143e83d3900ff39357651ea4e0f6 upstream. This patch fixes the broken serial log when changing the clock source of uart device. Before disabling the original clock source, this patch enables the new clock source to protect the clock off state for a split second. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-06-01serial: 8250_mid: recognize interrupt source in handlerAndy Shevchenko
commit c42850f1ae7e70056f852e67bb9dddf927853b47 upstream. There is a special register that shows interrupt status by source. In particular case the source can be a combination of DMA Tx, DMA Rx, and UART. Read the register and call the handlers only for sources that request an interrupt. Fixes: 6ede6dcd87aa ("serial: 8250_mid: add support for DMA engine handling from UART MMIO") Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01serial: 8250_mid: use proper bar for DNV platformAndy Shevchenko
commit 107e15fc1f8d6ef69eac5f175971252f76e82f0d upstream. Unlike Intel Medfield and Tangier platforms DNV uses PCI BAR0 for IO compatible resources and BAR1 for MMIO. We need latter in a way to support DMA. Introduce an additional field in the internal structure and pass PCI BAR based on device ID. Reported-by: "Lai, Poey Seng" <poey.seng.lai@intel.com> Fixes: 6ede6dcd87aa ("serial: 8250_mid: add support for DMA engine handling from UART MMIO") Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01serial: 8250_pci: fix divide error bug if baud rate is 0David Müller
commit 6f210c18c1c0f016772c8cd51ae12a02bfb9e7ef upstream. Since commit 21947ba654a6 ("serial: 8250_pci: replace switch-case by formula"), the 8250 driver crashes in the byt_set_termios() function with a divide error. This is caused by the fact that a baud rate of 0 (B0) is not handled properly. Fix it by falling back to B9600 in this case. Signed-off-by: David Müller <d.mueller@elsoft.ch> Fixes: 21947ba654a6 ("serial: 8250_pci: replace switch-case by formula") Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01tty/serial: atmel: fix hardware handshake selectionAlexandre Belloni
commit 5be605ac9af979265d7b64c160ad9928088a78be upstream. Commit 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when hardware handshake is enabled") actually allowed to enable hardware handshaking. Before, the CRTSCTS flags was silently ignored. As the DMA controller can't drive RTS (as explain in the commit message). Ensure that hardware flow control stays disabled when DMA is used and FIFOs are not available. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Fixes: 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when hardware handshake is enabled") Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-04serial: sh-sci: Remove cpufreq notifier to fix crash/deadlockGeert Uytterhoeven
commit ff1cab374ad98f4b9f408525ca9c08992b4ed784 upstream. The BSP team noticed that there is spin/mutex lock issue on sh-sci when CPUFREQ is used. The issue is that the notifier function may call mutex_lock() while the spinlock is held, which can lead to a BUG(). This may happen if CPUFREQ is changed while another CPU calls clk_get_rate(). Taking the spinlock was added to the notifier function in commit e552de2413edad1a ("sh-sci: add platform device private data"), to protect the list of serial ports against modification during traversal. At that time the Common Clock Framework didn't exist yet, and clk_get_rate() just returned clk->rate without taking a mutex. Note that since commit d535a2305facf9b4 ("serial: sh-sci: Require a device per port mapping."), there's no longer a list of serial ports to traverse, and taking the spinlock became superfluous. To fix the issue, just remove the cpufreq notifier: 1. The notifier doesn't work correctly: all it does is update stored clock rates; it does not update the divider in the hardware. The divider will only be updated when calling sci_set_termios(). I believe this was broken back in 2004, when the old drivers/char/sh-sci.c driver (where the notifier did update the divider) was replaced by drivers/serial/sh-sci.c (where the notifier just updated port->uartclk). Cfr. full-history-linux commits 6f8deaef2e9675d9 ("[PATCH] sh: port sh-sci driver to the new API") and 3f73fe878dc9210a ("[PATCH] Remove old sh-sci driver"). 2. On modern SoCs, the sh-sci parent clock rate is no longer related to the CPU clock rate anyway, so using a cpufreq notifier is futile. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-128250: use callbacks to access UART_DLL/UART_DLMSebastian Frias
commit 0b41ce991052022c030fd868e03877700220b090 upstream. Some UART HW has a single register combining UART_DLL/UART_DLM (this was probably forgotten in the change that introduced the callbacks, commit b32b19b8ffc05cbd3bf91c65e205f6a912ca15d9) Fixes: b32b19b8ffc0 ("[SERIAL] 8250: set divisor register correctly ...") Signed-off-by: Sebastian Frias <sf84@laposte.net> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-25serial: omap: Prevent DoS using unprivileged ioctl(TIOCSRS485)Peter Hurley
commit 308bbc9ab838d0ace0298268c7970ba9513e2c65 upstream. The omap-serial driver emulates RS485 delays using software timers, but neglects to clamp the input values from the unprivileged ioctl(TIOCSRS485). Because the software implementation busy-waits, malicious userspace could stall the cpu for ~49 days. Clamp the input values to < 100ms. Fixes: 4a0ac0f55b18 ("OMAP: add RS485 support") Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-25serial: 8250_pci: Add Intel Broadwell portsMika Westerberg
commit 6c55d9b98335f7f6bd5f061866ff1633401f3a44 upstream. Some recent (early 2015) macbooks have Intel Broadwell where LPSS UARTs are PCI enumerated instead of ACPI. The LPSS UART block is pretty much same as used on Intel Baytrail so we can reuse the existing Baytrail setup code. Add both Broadwell LPSS UART ports to the list of supported devices. Signed-off-by: Leif Liddy <leif.liddy@gmail.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-25tty: Add support for PCIe WCH382 2S multi-IO cardJeremy McNicoll
commit 7dde55787b43a8f2b4021916db38d90c03a2ec64 upstream. WCH382 2S board is a PCIe card with 2 DB9 COM ports detected as Serial controller: Device 1c00:3253 (rev 10) (prog-if 05 [16850]) Signed-off-by: Jeremy McNicoll <jmcnicol@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparcLinus Torvalds
Pull sparc fixes from David Miller: 1) Finally make perf stack backtraces stable on sparc, several problems (mostly due to the context in which the user copies from the stack are done) contributed to this. From Rob Gardner. 2) Export ADI capability if the cpu supports it. 3) Hook up userfaultfd system call. 4) When faults happen during user copies we really have to clean up and restore the FPU state fully. Also from Rob Gardner * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: tty/serial: Skip 'NULL' char after console break when sysrq enabled sparc64: fix FP corruption in user copy functions sparc64: Perf should save/restore fault info sparc64: Ensure perf can access user stacks sparc64: Don't set %pil in rtrap_nmi too early sparc64: Add ADI capability to cpu capabilities tty: serial: constify sunhv_ops structs sparc: Hook up userfaultfd system call
2015-12-24tty/serial: Skip 'NULL' char after console break when sysrq enabledVijay Kumar
When sysrq is triggered from console, serial driver for SUN hypervisor console receives a console break and enables the sysrq. It expects a valid sysrq char following with break. Meanwhile if driver receives 'NULL' ASCII char then it disables sysrq and sysrq handler will never be invoked. This fix skips calling uart sysrq handler when 'NULL' is received while sysrq is enabled. Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com> Acked-by: Karl Volz <karl.volz@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-24tty: serial: constify sunhv_ops structsAya Mahfouz
Constifies sunhv_ops structures in tty's serial driver since they are not modified after their initialization. Detected and found using Coccinelle. Suggested-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-12serial: earlycon: Add missing spinlock initializationGeert Uytterhoeven
If an earlycon console driver needs to acquire the uart_port.lock spinlock for serial console output, and CONFIG_DEBUG_SPINLOCK=y: BUG: spinlock bad magic on CPU#0, swapper/0 lock: sci_ports+0x0/0x3480, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0 CPU: 0 PID: 0 Comm: swapper Not tainted 4.4.0-rc2-koelsch-g62ea5edf143bb1d0-dirty #2083 Hardware name: Generic R8A7791 (Flattened Device Tree) [<c00173a0>] (unwind_backtrace) from [<c0013094>] (show_stack+0x10/0x14) [<c0013094>] (show_stack) from [<c01f2338>] (dump_stack+0x70/0x8c) [<c01f2338>] (dump_stack) from [<c00702d8>] (do_raw_spin_lock+0x20/0x190) [<c00702d8>] (do_raw_spin_lock) from [<c0267590>] (serial_console_write+0x4c/0x130) [<c0267590>] (serial_console_write) from [<c00734c4>] (call_console_drivers.constprop.13+0xc8/0xec) [<c00734c4>] (call_console_drivers.constprop.13) from [<c0074ef0>] (console_unlock+0x354/0x440) [<c0074ef0>] (console_unlock) from [<c0075bb4>] (register_console+0x2a0/0x394) [<c0075bb4>] (register_console) from [<c06cb750>] (of_setup_earlycon+0x90/0xa4) [<c06cb750>] (of_setup_earlycon) from [<c06cfb60>] (setup_of_earlycon+0x118/0x13c) [<c06cfb60>] (setup_of_earlycon) from [<c06b34ac>] (do_early_param+0x64/0xb4) [<c06b34ac>] (do_early_param) from [<c00472c0>] (parse_args+0x254/0x350) [<c00472c0>] (parse_args) from [<c06b3860>] (parse_early_options+0x2c/0x3c) [<c06b3860>] (parse_early_options) from [<c06b389c>] (parse_early_param+0x2c/0x40) [<c06b389c>] (parse_early_param) from [<c06b5b08>] (setup_arch+0x520/0xaf0) [<c06b5b08>] (setup_arch) from [<c06b3948>] (start_kernel+0x94/0x370) [<c06b3948>] (start_kernel) from [<40008090>] (0x40008090) Initialize the spinlock in of_setup_earlycon() and register_earlycon(), to fix this for both DT-based and legacy earlycon. If the driver would reinitialize the spinlock again, this is harmless, as it's allowed to reinitialize an unlocked spinlock. Alternatives are: - Drivers having an early_serial_console_write() that only performs the core functionality of serial_console_write(), without acquiring the lock (which may be unsafe, depending on the hardware), - Drivers initializing the spinlock in their private earlycon setup functions. As uart_port is owned by generic serial_core, and uart_port.lock is initialized by uart_add_one_port() for the normal case, this can better be handled in the earlycon core. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Reported-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-12serial: sh-sci: Fix length of scatterlistYoshihiro Shimoda
This patch fixes an issue that the "length" of scatterlist should be set using sg_dma_len(). Otherwise, a dmaengine driver cannot work correctly if CONFIG_NEED_SG_DMA_LENGTH=y. Fixes: 7b39d90184 (serial: sh-sci: Fix NULL pointer dereference if HIGHMEM is enabled) Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-12serial: 8250_uniphier: fix dl_read and dl_write functionsMasahiro Yamada
The register offset must be shifted by regshift, otherwise the baudrate is not set. I missed the issue probably because the divisor register was already set by the boot loader. Fixes: 1a8d2903cb6a ("serial: 8250_uniphier: add UniPhier serial driver") Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-11-20serial: export fsl8250_handle_irqArnd Bergmann
fsl8250_handle_irq is now used by the of_serial driver, and that fails if it is a loadable module: ERROR: "fsl8250_handle_irq" [drivers/tty/serial/of_serial.ko] undefined! This exports the symbol to avoid randconfig errors. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: d43b54d269d2 ("serial: Enable Freescale 16550 workaround on arm") Cc: Scott Wood <scottwood@freescale.com> Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-11-20serial: 8250_mid: Add missing dependencyHeikki Krogerus
8250_mid uses rational_best_approximation() function, so the driver needs to select CONFIG_RATIONAL option. This fixes build error when CONFIG_RATIONAL is not enabled: drivers/built-in.o: In function `mid8250_set_termios': 8250_mid.c:(.text+0x10169a): undefined reference to `rational_best_approximation' Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-11-20serial: etraxfs-uart: Fix crashGuenter Roeck
Since commit 7d8c70d8048c ("serial: mctrl-gpio: rename init function"), crisv32 either do not build or crash as follows. Unable to handle kernel NULL pointer dereference Linux 4.3.0-rc7-next-20151101 #1 Sun Nov 1 11:41:28 PST 2015 ... Call Trace: [<c0004a0e>] show_stack+0x0/0x9e [<c004c0c0>] printk+0x0/0x2c [<c00059d4>] show_registers+0x14a/0x1c2 [<c004c0c0>] printk+0x0/0x2c [<c0004b52>] die_if_kernel+0x7c/0x9e [<c0005346>] do_page_fault+0x32e/0x3e6 [<c01dc59c>] of_get_property+0x0/0x2c [<c01e0558>] of_irq_parse_raw+0x12a/0x376 [<c01dc59c>] of_get_property+0x0/0x2c [<c0053aca>] get_page_from_freelist+0x73e/0x856 [<c01dc59c>] of_get_property+0x0/0x2c [<c0008912>] d_mmu_refill+0x10a/0x112 [<c01b488c>] devm_kmalloc+0x40/0x56 [<c01b47d0>] add_dr+0xc/0x1c [<c01b4800>] devm_add_action+0x2/0x4e [<c01abdbc>] mctrl_gpio_init_noauto+0x1c/0x76 [<c01abf9e>] mctrl_gpio_init+0x22/0x110 The function call in the etraxfs-uart driver was not renamed, possibly due to interference with commit 7b9c5162c182 ("serial: etraxfs-uart: use mctrl_gpio helpers for handling modem signals"). Fixes: 7d8c70d8048c ("serial: mctrl-gpio: rename init function") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Niklas Cassel <nks@flawful.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-11-20serial: fsl_lpuart: Fix earlycon supportPeter Hurley
Earlycon support for Freescale lpuart should only be enabled when console support is enabled. Fixes: 1d59b382f1c4 ("serial: fsl_lpuart: add earlycon support") Acked-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-11-20bcm63xx_uart: Use the device name when registering an interruptSimon Arlott
Use the device name when registering an interrupt so that multiple ports don't all have the same interrupt name. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-11-05Merge tag 'spi-v4.4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi updates from Mark Brown: "Quite a lot of activity in SPI this cycle, almost all of it in drivers with a few minor improvements and tweaks in the core. - Updates to pxa2xx to support Intel Broxton and multiple chip selects. - Support for big endian in the bcm63xx driver. - Multiple slave support for the mt8173 - New driver for the auxiliary SPI controller in bcm2835 SoCs. - Support for Layerscale SoCs in the Freescale DSPI driver" * tag 'spi-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (87 commits) spi: pxa2xx: Rework self-initiated platform data creation for non-ACPI spi: pxa2xx: Add support for Intel Broxton spi: pxa2xx: Detect number of enabled Intel LPSS SPI chip select signals spi: pxa2xx: Add output control for multiple Intel LPSS chip selects spi: pxa2xx: Use LPSS prefix for defines that are Intel LPSS specific spi: Add DSPI support for layerscape family spi: ti-qspi: improve ->remove() callback spi/spi-xilinx: Fix race condition on last word read spi: Drop owner assignment from spi_drivers spi: Add THIS_MODULE to spi_driver in SPI core spi: Setup the master controller driver before setting the chipselect spi: dw: replace magic constant by DW_SPI_DR spi: mediatek: mt8173 spi multiple devices support spi: mediatek: handle controller_data in mtk_spi_setup spi: mediatek: remove mtk_spi_config spi: mediatek: Update document devicetree bindings to support multiple devices spi: fix kernel-doc warnings about missing return desc in spi.c spi: fix kernel-doc warnings about missing return desc in spi.h spi: pxa2xx: Align a few defines spi: pxa2xx: Save other reg_cs_ctrl bits when configuring chip select ...
2015-11-05Merge tag 'clk-for-linus-20151104' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux Pull clk updates from Stephen Boyd: "The majority of the changes are driver updates and new device support. The core framework is mostly unchanged this time around, with only a couple patches to expose a clk provider API and make getting clk parent names from DT more robust. Driver updates: - Support for clock controllers found on Broadcom Northstar SoCs and bcm2835 SoC - Support for Allwinner audio clocks - A few cleanup patches for Tegra drivers and support for the highest DFLL frequencies on Tegra124 - Samsung exynos7 fixes and improvements - i.Mx SoC updates to add a few missing clocks and keep debug uart clocks on during kernel intialization - Some mediatek cleanups and support for more subsystem clocks - Support for msm8916 gpu/audio clocks and qcom's GDSC power domain controllers - A new driver for the Silabs si514 clock chip" * tag 'clk-for-linus-20151104' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (143 commits) clk: qcom: msm8960: Fix dsi1/2 halt bits clk: lpc18xx-cgu: fix potential system hang when disabling unused clocks clk: lpc18xx-ccu: fix potential system hang when disabling unused clocks clk: Add clk_hw_is_enabled() for use by clk providers clk: Add stubs for of_clk_*() APIs when CONFIG_OF=n clk: versatile-icst: fix memory leak clk: Remove clk_{register,unregister}_multiplier() clk: iproc: define Broadcom NS2 iProc clock binding clk: iproc: define Broadcom NSP iProc clock binding clk: ns2: add clock support for Broadcom Northstar 2 SoC clk: iproc: Separate status and control variables clk: iproc: Split off dig_filter clk: iproc: Add PLL base write function clk: nsp: add clock support for Broadcom Northstar Plus SoC clk: iproc: Add PWRCTRL support clk: cygnus: Convert all macros to all caps ARM: cygnus: fix link failures when CONFIG_COMMON_CLK_IPROC is disabled clk: imx31: add missing of_node_put clk: imx27: add missing of_node_put clk: si5351: add missing of_node_put ...
2015-11-04Merge tag 'tty-4.4-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver updates from Greg KH: "Here is the big tty and serial driver update for 4.4-rc1. Lots of serial driver updates and a few small tty core changes. Full details in the shortlog. All of these have been in linux-next for a while" * tag 'tty-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (148 commits) tty: Use unbound workqueue for all input workers tty: Abstract tty buffer work tty: Prevent tty teardown during tty_write_message() tty: core: Use correct spinlock flavor in tiocspgrp() tty: Combine SIGTTOU/SIGTTIN handling serial: amba-pl011: fix incorrect integer size in pl011_fifo_to_tty() ttyFDC: Fix build problems due to use of module_{init,exit} tty: remove unneeded return statement serial: 8250_mid: add support for DMA engine handling from UART MMIO dmaengine: hsu: remove platform data dmaengine: hsu: introduce stubs for the exported functions dmaengine: hsu: make the UART driver in control of selecting this driver serial: fix mctrl helper functions serial: 8250_pci: Intel MID UART support to its own driver serial: fsl_lpuart: add earlycon support tty: disable unbind for old 74xx based serial/mpsc console port serial: pl011: Spelling s/clocks-names/clock-names/ n_tty: Remove reader wakeups for TTY_BREAK/TTY_PARITY chars tty: synclink, fix indentation serial: at91, fix rs485 properties ...
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