James Hogan 4cebec609a TTY: Add MIPS EJTAG Fast Debug Channel TTY driver ... Add TTY driver and consoles for the MIPS EJTAG Fast Debug Channel (FDC), which is found on the per-CPU MIPS Common Device Mapped Memory (CDMM) bus. The FDC is a per-CPU device which is used to communicate with an EJTAG probe. RX and TX FIFOs exist, containing 32-bits of data and 4-bit channel numbers. 16 general data streams are implemented on this for TTY and console use by encoding up to 4 bytes on each 32-bit FDC word. The TTY devices are named e.g. /dev/ttyFDC3c2 for channel 2 of the FDC attached to logical CPU 3. These can be used for getting the kernel log, a login prompt, or as a GDB remote transport, all over EJTAG and without needing a serial port. It can have an interrupt to notify of when incoming data is available in the RX FIFO or when the TX FIFO is no longer full. The detection of this interrupt occurs in architecture / platform code, but it may be shared with the timer and/or performance counter interrupt. Due to the per-CPU nature of the hardware, all outgoing TTY data is written out from a kthread which is pinned to the appropriate CPU. The console is not bound to a specific CPU, so output will appear on the chosen channel on whichever CPU the code is executing on. Enable with e.g. console=fdc1 in kernel arguments. /dev/console is bound to the same channel on the boot CPU's FDC if it exists. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.cz> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/9146/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		2015-03-31 12:04:12 +02:00
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accessibility	…
acpi	Revert "x86/PCI: Refine the way to release PCI IRQ resources"	2015-03-20 14:56:19 +01:00
amba	ARM: 8256/1: driver coamba: add device binding path 'driver_override'	2015-02-10 10:23:15 +00:00
android	android: binder: fix binder mmap failures	2015-03-01 18:43:51 -08:00
ata	sata-fsl: Apply link speed limits	2015-03-02 12:08:43 -05:00
atm	…
auxdisplay	…
base	regmap: Fixes for v4.0	2015-03-17 10:41:26 -07:00
bcma	…
block	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2015-02-28 10:21:57 -08:00
bluetooth	Bluetooth: btusb: Fix issue with CSR based Intel Wireless controllers	2015-02-23 09:30:35 +02:00
bus	MIPS: Add CDMM bus support	2015-03-31 12:04:12 +02:00
cdrom	…
char	Not entirely surprising: the ongoing QEMU work on virtio 1.0 has revealed	2015-03-17 10:36:01 -07:00
clk	CLK: Pistachio: Register external clock gates	2015-03-31 11:59:31 +02:00
clocksource	clockevents: sun5i: Fix setup_irq init sequence	2015-03-05 15:01:37 +01:00
connector	…
coresight	coresight: fix function etm_writel_cp14() parameter order	2015-02-04 10:42:55 -08:00
cpufreq	Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal	2015-03-06 13:43:33 -08:00
cpuidle	cpuidle: mvebu: Update cpuidle thresholds for Armada XP SOCs	2015-03-13 18:31:29 +01:00
crypto	Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma	2015-02-18 08:49:20 -08:00
dca	…
devfreq	Merge branches 'pm-cpufreq', 'pm-cpuidle', 'pm-devfreq', 'pm-opp' and 'pm-tools'	2015-02-13 21:39:06 +01:00
dio	…
dma	dmaengine: pl08x: Define capabilities for generic capabilities reporting	2015-03-18 21:34:29 +05:30
dma-buf	…
edac	* A fix to sb_edac for proper detection on SNB machines	2015-02-19 11:18:14 -08:00
eisa	…
extcon	…
firewire	firewire: core: use correct vendor/model IDs	2015-02-02 21:56:03 +01:00
firmware	* Fix regression in DMI sysfs code for handling "End of Table" entry	2015-03-02 14:18:57 +01:00
fmc	…
gpio	gpio: tps65912: fix wrong container_of arguments	2015-02-23 15:40:32 +01:00
gpu	Merge tag 'drm-intel-fixes-2015-03-19' of git://anongit.freedesktop.org/drm-intel into drm-fixes	2015-03-20 17:32:21 +10:00
hid	HID: wacom: check for wacom->shared before following the pointer	2015-03-17 20:59:55 +01:00
hsi	…
hv	Char / Misc patches for 3.20-rc1	2015-02-15 10:48:44 -08:00
hwmon	hwmon: (ads7828) Check return value of devm_regmap_init_i2c	2015-02-22 20:10:30 -08:00
hwspinlock	…
i2c	Revert "i2c: core: Dispose OF IRQ mapping at client removal time"	2015-03-12 10:23:05 +01:00
ide	ide_tape: convert jiffies with jiffies_to_msecs	2015-03-18 23:25:57 -04:00
idle	intel_idle: Add ->enter_freeze callbacks	2015-02-15 19:40:09 +01:00
iio	Second round of IIO fixes for the 4.0 cycle (or round one part two really!)	2015-02-28 07:19:27 -08:00
infiniband	IB/mlx4: Saturate RoCE port PMA counters in case of overflow	2015-03-18 15:17:11 -04:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2015-03-19 16:43:10 -07:00
iommu	iommu/io-pgtable-arm: Add built time dependency	2015-03-03 14:04:12 +01:00
ipack	…
irqchip	IRQCHIP: mips-gic: Add function for retrieving FDC IRQ	2015-03-31 12:04:12 +02:00
isdn	isdn: icn: use strlcpy() when parsing setup options	2015-03-15 22:24:37 -04:00
leds	leds: leds-gpio: Pass on error codes unmodified	2015-02-02 14:36:10 -08:00
lguest	OK, this has the big virtio 1.0 implementation, as specified by OASIS.	2015-02-18 09:24:01 -08:00
macintosh	…
mailbox	Merge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration	2015-02-11 12:56:40 -08:00
mcb	mcb: Fix error path of mcb_pci_probe	2015-02-03 15:48:51 -08:00
md	One fix for md in 4.0-rc4	2015-03-22 16:38:19 -07:00
media	mm: gup: use get_user_pages_unlocked	2015-02-11 17:06:05 -08:00
memory	memory/fsl-corenet-cf: Add t1040 support	2015-01-29 22:57:43 -06:00
memstick	…
message	i2o: move to staging	2015-02-03 15:58:39 -08:00
mfd	Changes to existing drivers:	2015-02-18 09:05:48 -08:00
misc	mei: make device disabled on stop unconditionally	2015-03-01 19:34:50 -08:00
mmc	mmc: pwrseq_simple: fix error path in mmc_pwrseq_simple_alloc	2015-03-19 11:26:35 +01:00
mtd	This pull request fixes a bug introduced during the v4.0 merge window where we	2015-03-21 10:36:44 -07:00
net	Revert "net: cx82310_eth: use common match macro"	2015-03-18 22:37:38 -04:00
nfc	NFC: nci: Move NFCEE discovery logic	2015-02-04 09:15:18 +01:00
ntb	…
nubus	…
of	Revert "of: Fix premature bootconsole disable with 'stdout-path'"	2015-03-19 08:46:54 -05:00
oprofile	…
parisc	…
parport	…
pci	PCI updates for v4.0:	2015-03-12 09:45:46 -07:00
pcmcia	Revert "pcmcia: add a new resource manager for non ISA systems"	2015-03-11 14:21:23 +01:00
phy	phy: omap-usb2: Fix missing clk_prepare call when using old dt name	2015-03-13 17:14:39 +05:30
pinctrl	pinctrl: sun4i: GPIOs configured as irq must be set to input before reading	2015-03-18 10:56:46 +01:00
platform	Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-02-21 11:12:07 -08:00
pnp	Merge branches 'pnp', 'pm-cpuidle' and 'pm-cpufreq'	2015-02-21 04:29:16 +01:00
power	…
powercap	powercap / RAPL: handle domains with different energy units	2015-03-13 23:18:44 +01:00
pps	…
ps3	…
ptp	…
pwm	pwm: tegra: Use NSEC_PER_SEC	2015-02-18 08:40:29 +01:00
rapidio	Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma	2015-02-18 08:49:20 -08:00
ras	…
regulator	Merge remote-tracking branches 'regulator/fix/gpio-enable' and 'regulator/fix/tps65910' into regulator-linus	2015-03-16 11:43:24 +00:00
remoteproc	…
reset	…
rpmsg	virtio_rpmsg: set DRIVER_OK before using device	2015-03-13 15:55:42 +10:30
rtc	rtc: at91rm9200: double locking bug in at91_rtc_interrupt()	2015-03-18 01:58:16 +01:00
s390	s390/dcss: array index 'i' is used before limits check.	2015-02-26 09:24:48 +01:00
sbus	…
scsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-03-21 11:24:38 -07:00
sfi	…
sh	drivers: sh: Disable PM runtime for multi-platform r8a7740 with genpd	2015-02-24 07:26:12 +09:00
sn	…
soc	ARM: SoC driver updates	2015-02-17 09:38:59 -08:00
spi	Merge remote-tracking branches 'spi/fix/atmel', 'spi/fix/doc', 'spi/fix/dw', 'spi/fix/img-spfi', 'spi/fix/pl022' and 'spi/fix/ti-qspi' into spi-linus	2015-03-06 21:10:56 +00:00
spmi	…
ssb	treewide: Remove unnecessary SSB_DEVTABLE_END macro	2015-02-11 14:38:29 -08:00
staging	vt6655: Fix late setting of byRFType.	2015-03-09 11:33:13 +01:00
target	target: do not reject FUA CDBs when write cache is enabled but emulate_write_cache is 0	2015-03-19 23:26:46 -07:00
tc	…
thermal	thermal: Make sysfs attributes of cooling devices default attributes	2015-03-05 01:47:57 -04:00
thunderbolt	…
tty	TTY: Add MIPS EJTAG Fast Debug Channel TTY driver	2015-03-31 12:04:12 +02:00
uio	…
usb	USB / PHY driver fixes for 4.0-rc5	2015-03-22 11:33:55 -07:00
uwb	USB patches for 3.20-rc1	2015-02-15 10:24:55 -08:00
vfio	vfio-pci: Add missing break to enable VFIO_PCI_ERR_IRQ_INDEX	2015-03-12 09:51:38 -06:00
vhost	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-03-21 11:24:38 -07:00
video	OMAPDSS: fix regression with display sysfs files	2015-02-26 10:23:15 +02:00
virt	…
virtio	virtio_mmio: fix access width for mmio	2015-03-17 12:12:21 +10:30
vlynq	…
vme	…
w1	…
watchdog	watchdog: at91sam9: request the irq with IRQF_NO_SUSPEND	2015-03-06 00:46:31 +01:00
xen	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-03-21 11:24:38 -07:00
zorro	…
Kconfig	i2o: move to staging	2015-02-03 15:58:39 -08:00
Makefile	…