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
Revert "x86/PCI: Refine the way to release PCI IRQ resources"
2015-03-20 14:56:19 +01:00
ARM: 8256/1: driver coamba: add device binding path 'driver_override'
2015-02-10 10:23:15 +00:00
android: binder: fix binder mmap failures
2015-03-01 18:43:51 -08:00
sata-fsl: Apply link speed limits
2015-03-02 12:08:43 -05:00
regmap: Fixes for v4.0
2015-03-17 10:41:26 -07:00
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
2015-02-28 10:21:57 -08:00
Bluetooth: btusb: Fix issue with CSR based Intel Wireless controllers
2015-02-23 09:30:35 +02:00
MIPS: Add CDMM bus support
2015-03-31 12:04:12 +02:00
Not entirely surprising: the ongoing QEMU work on virtio 1.0 has revealed
2015-03-17 10:36:01 -07:00
CLK: Pistachio: Register external clock gates
2015-03-31 11:59:31 +02:00
clockevents: sun5i: Fix setup_irq init sequence
2015-03-05 15:01:37 +01:00
coresight: fix function etm_writel_cp14() parameter order
2015-02-04 10:42:55 -08:00
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: mvebu: Update cpuidle thresholds for Armada XP SOCs
2015-03-13 18:31:29 +01:00
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
2015-02-18 08:49:20 -08:00
Merge branches 'pm-cpufreq', 'pm-cpuidle', 'pm-devfreq', 'pm-opp' and 'pm-tools'
2015-02-13 21:39:06 +01:00
dmaengine: pl08x: Define capabilities for generic capabilities reporting
2015-03-18 21:34:29 +05:30
* A fix to sb_edac for proper detection on SNB machines
2015-02-19 11:18:14 -08:00
firewire: core: use correct vendor/model IDs
2015-02-02 21:56:03 +01:00
* Fix regression in DMI sysfs code for handling "End of Table" entry
2015-03-02 14:18:57 +01:00
gpio: tps65912: fix wrong container_of arguments
2015-02-23 15:40:32 +01:00
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: wacom: check for wacom->shared before following the pointer
2015-03-17 20:59:55 +01:00
Char / Misc patches for 3.20-rc1
2015-02-15 10:48:44 -08:00
hwmon: (ads7828) Check return value of devm_regmap_init_i2c
2015-02-22 20:10:30 -08:00
Revert "i2c: core: Dispose OF IRQ mapping at client removal time"
2015-03-12 10:23:05 +01:00
ide_tape: convert jiffies with jiffies_to_msecs
2015-03-18 23:25:57 -04:00
intel_idle: Add ->enter_freeze callbacks
2015-02-15 19:40:09 +01:00
Second round of IIO fixes for the 4.0 cycle (or round one part two really!)
2015-02-28 07:19:27 -08:00
IB/mlx4: Saturate RoCE port PMA counters in case of overflow
2015-03-18 15:17:11 -04:00
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/io-pgtable-arm: Add built time dependency
2015-03-03 14:04:12 +01:00
IRQCHIP: mips-gic: Add function for retrieving FDC IRQ
2015-03-31 12:04:12 +02:00
isdn: icn: use strlcpy() when parsing setup options
2015-03-15 22:24:37 -04:00
leds: leds-gpio: Pass on error codes unmodified
2015-02-02 14:36:10 -08:00
OK, this has the big virtio 1.0 implementation, as specified by OASIS.
2015-02-18 09:24:01 -08:00
Merge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration
2015-02-11 12:56:40 -08:00
mcb: Fix error path of mcb_pci_probe
2015-02-03 15:48:51 -08:00
One fix for md in 4.0-rc4
2015-03-22 16:38:19 -07:00
mm: gup: use get_user_pages_unlocked
2015-02-11 17:06:05 -08:00
i2o: move to staging
2015-02-03 15:58:39 -08:00
Changes to existing drivers:
2015-02-18 09:05:48 -08:00
mei: make device disabled on stop unconditionally
2015-03-01 19:34:50 -08:00
mmc: pwrseq_simple: fix error path in mmc_pwrseq_simple_alloc
2015-03-19 11:26:35 +01:00
This pull request fixes a bug introduced during the v4.0 merge window where we
2015-03-21 10:36:44 -07:00
Revert "net: cx82310_eth: use common match macro"
2015-03-18 22:37:38 -04:00
NFC: nci: Move NFCEE discovery logic
2015-02-04 09:15:18 +01:00
Revert "of: Fix premature bootconsole disable with 'stdout-path'"
2015-03-19 08:46:54 -05:00
PCI updates for v4.0:
2015-03-12 09:45:46 -07:00
Revert "pcmcia: add a new resource manager for non ISA systems"
2015-03-11 14:21:23 +01:00
phy: omap-usb2: Fix missing clk_prepare call when using old dt name
2015-03-13 17:14:39 +05:30
pinctrl: sun4i: GPIOs configured as irq must be set to input before reading
2015-03-18 10:56:46 +01:00
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
Merge branches 'pnp', 'pm-cpuidle' and 'pm-cpufreq'
2015-02-21 04:29:16 +01:00
powercap / RAPL: handle domains with different energy units
2015-03-13 23:18:44 +01:00
pwm: tegra: Use NSEC_PER_SEC
2015-02-18 08:40:29 +01:00
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
2015-02-18 08:49:20 -08:00
Merge remote-tracking branches 'regulator/fix/gpio-enable' and 'regulator/fix/tps65910' into regulator-linus
2015-03-16 11:43:24 +00:00
virtio_rpmsg: set DRIVER_OK before using device
2015-03-13 15:55:42 +10:30
rtc: at91rm9200: double locking bug in at91_rtc_interrupt()
2015-03-18 01:58:16 +01:00
s390/dcss: array index 'i' is used before limits check.
2015-02-26 09:24:48 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
2015-03-21 11:24:38 -07:00
drivers: sh: Disable PM runtime for multi-platform r8a7740 with genpd
2015-02-24 07:26:12 +09:00
ARM: SoC driver updates
2015-02-17 09:38:59 -08:00
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
treewide: Remove unnecessary SSB_DEVTABLE_END macro
2015-02-11 14:38:29 -08:00
vt6655: Fix late setting of byRFType.
2015-03-09 11:33:13 +01:00
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
thermal: Make sysfs attributes of cooling devices default attributes
2015-03-05 01:47:57 -04:00
TTY: Add MIPS EJTAG Fast Debug Channel TTY driver
2015-03-31 12:04:12 +02:00
USB / PHY driver fixes for 4.0-rc5
2015-03-22 11:33:55 -07:00
USB patches for 3.20-rc1
2015-02-15 10:24:55 -08:00
vfio-pci: Add missing break to enable VFIO_PCI_ERR_IRQ_INDEX
2015-03-12 09:51:38 -06:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
2015-03-21 11:24:38 -07:00
OMAPDSS: fix regression with display sysfs files
2015-02-26 10:23:15 +02:00
virtio_mmio: fix access width for mmio
2015-03-17 12:12:21 +10:30
watchdog: at91sam9: request the irq with IRQF_NO_SUSPEND
2015-03-06 00:46:31 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
2015-03-21 11:24:38 -07:00
i2o: move to staging
2015-02-03 15:58:39 -08:00
4cebec609a