Sebastian Andrzej Siewior 0a0661ddb8 tty: serial: 8250: omap: add dma support ... This patch adds the required pieces to 8250-OMAP UART driver for DMA support. The TX burst size is set to 1 so we can send an arbitrary amount of bytes. The RX burst is currently set to 48 which means we receive an DMA interrupt every 48 bytes and have to reprogram everything. Less bytes in the RX-FIFO mean that no DMA transfer will happen and the UART will send a RX-timeout _or_ RDI event at which point the FIFO will be manually purged. There is a workaround for TX-DMA on AM33xx where we put the first byte into the FIFO to kick start the DMA process. Haven't seen this problem on OMAP36xx (beagle board xm) or DRA7xx. On AM375x there is "Usage Note 2.7: UART: Cannot Acknowledge Idle Requests in Smartidle Mode When Configured for DMA Operations" in the errata document. This problem persists even after disabling DMA in the UART and will be addressed in the HWMOD. v10: - delay update_registers() from set_termios() until TX-DMA is done. It has been reported / proved that invoking update_registers() while TX-DMA is in progress may stall the DMA operation and it won't finish. - use the new omap DMA-TX-RX hooks and DMA only interrupt routine. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2014-11-05 19:13:34 -08:00
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accessibility	…
acpi	Merge branches 'acpi-scan' and 'acpi-ec'	2014-10-31 22:24:44 +01:00
amba	PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h	2014-09-30 01:16:44 +02:00
ata	Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma	2014-10-18 18:11:04 -07:00
atm	atm: simplify lanai.c by using module_pci_driver	2014-10-17 11:55:32 -04:00
auxdisplay	…
base	ACPI and power management fixes for 3.18-rc3	2014-10-31 19:08:25 -07:00
bcma	bcma: add another PCI ID of device with BCM43228	2014-10-23 14:02:06 -04:00
block	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc	2014-10-31 15:00:48 -07:00
bluetooth	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-10-13 11:28:42 +02:00
bus	ARM: SoC driver updates for 3.18	2014-10-08 17:37:16 -04:00
cdrom	…
char	Return short read or 0 at end of a raw device, not EIO	2014-10-31 06:33:26 -04:00
clk	The clk tree changes for 3.18 are dominated by clock drivers. Mostly	2014-10-15 07:05:03 +02:00
clocksource	ARM/ARM64: arch-timer: fix arch_timer_probed logic	2014-10-26 20:50:00 +01:00
connector	…
cpufreq	cpufreq: cpufreq-dt: Restore default cpumask_setall(policy->cpus)	2014-10-27 23:27:35 +01:00
cpuidle	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2014-10-24 12:48:47 -07:00
crypto	crypto: LLVMLinux: Remove VLAIS from crypto/.../qat_algs.c	2014-10-14 10:51:23 +02:00
dca	…
devfreq	PM / devfreq: exynos: Enable building exynos PPMU as module	2014-09-29 20:22:36 +09:00
dio	…
dma	Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma	2014-10-18 18:11:04 -07:00
dma-buf	dma-buf: don't open-code atomic_long_read()	2014-10-09 02:39:07 -04:00
edac	e7xxx_edac: Report CE events properly	2014-10-22 22:59:00 +02:00
eisa	…
extcon	…
firewire	…
firmware	Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-23 14:45:09 -07:00
fmc	…
gpio	This is the bulk of GPIO changes for the v3.18 development	2014-10-09 14:58:15 -04:00
gpu	drm/exynos: correct connector->dpms field before resuming	2014-11-03 01:51:28 +09:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2014-10-29 11:52:35 -07:00
hsi	…
hv	…
hwmon	hwmon: (menf21bmc) Include linux/err.h	2014-10-19 18:41:18 -07:00
hwspinlock	…
i2c	Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2014-10-19 12:50:44 -07:00
ide	Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block	2014-10-18 12:12:45 -07:00
idle	…
iio	First round of IIO fixes for the 3.18 cycle.	2014-10-25 10:09:39 +08:00
infiniband	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2014-10-31 15:04:58 -07:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2014-10-31 19:51:11 -07:00
iommu	IOMMU Updates for Linux v3.18	2014-10-15 07:23:49 +02:00
ipack	…
irqchip	Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2014-10-15 07:48:18 +02:00
isdn	isdn/gigaset: fix usb_gigaset write_cmd result race	2014-10-14 15:05:35 -04:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds	2014-10-21 08:18:38 -07:00
lguest	…
macintosh	…
mailbox	Merge branch 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration	2014-10-21 11:21:19 -07:00
mcb	…
md	. fix DM's long-standing excessive use of memory by leveraging the new	2014-10-18 12:25:30 -07:00
media	[media] s5p-jpeg: Avoid -Wuninitialized warning in s5p_jpeg_parse_hdr	2014-10-24 09:36:59 -02:00
memory	…
memstick	memstick: r592: fix build warnings for !PM_SLEEP	2014-10-14 02:18:22 +02:00
message	SCSI for-linus on 20141007	2014-10-07 21:29:18 -04:00
mfd	Changes to existing drivers:	2014-10-15 06:58:16 +02:00
misc	cxl: Fix PSL error due to duplicate segment table entries	2014-10-28 19:52:52 +11:00
mmc	Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block	2014-10-18 12:12:45 -07:00
mtd	Three main MTD fixes for 3.18:	2014-11-02 14:45:52 -08:00
net	Merge tag 'master-2014-10-30' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless	2014-10-31 16:18:35 -04:00
nfc	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless	2014-10-07 14:48:29 -04:00
ntb	ntb: Adding split BAR support for Haswell platforms	2014-10-17 07:08:51 -04:00
nubus	…
of	drivers: of: add return value to of_reserved_mem_device_init()	2014-10-29 16:33:14 -07:00
oprofile	…
parisc	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-13 16:23:15 +02:00
parport	…
pci	PCI updates for v3.18:	2014-10-31 18:48:29 -07:00
pcmcia	…
phy	…
pinctrl	This is the bulk of GPIO changes for the v3.18 development	2014-10-09 14:58:15 -04:00
platform	thinkpad_acpi: replace strnicmp with strncasecmp	2014-10-14 02:18:25 +02:00
pnp	PNP: replace strnicmp with strncasecmp	2014-10-14 02:18:25 +02:00
power	power: reset: at91-reset: fix power down register	2014-10-22 10:08:22 +02:00
powercap	…
pps	…
ps3	…
ptp	…
pwm	pwm: Changes for v3.18-rc1	2014-10-21 08:17:43 -07:00
rapidio	…
ras	…
regulator	Merge remote-tracking branch 'regulator/fix/rk808' into regulator-linus	2014-10-27 11:26:24 +00:00
remoteproc	…
reset	…
rpmsg	…
rtc	drivers/rtc/rtc-bq32k.c: fix register value	2014-10-29 16:33:14 -07:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2014-10-21 07:47:54 -07:00
sbus	…
scsi	libcxgbi : support ipv6 address host_param	2014-10-28 09:57:00 +01:00
sfi	…
sh	…
sn	…
soc	ARM: SoC driver updates for 3.18	2014-10-08 17:37:16 -04:00
spi	Merge remote-tracking branches 'spi/fix/dw', 'spi/fix/orion', 'spi/fix/pl022', 'spi/fix/rockchip' and 'spi/fix/spidev' into spi-linus	2014-10-27 11:26:54 +00:00
spmi	…
ssb	This is the bulk of GPIO changes for the v3.18 development	2014-10-09 14:58:15 -04:00
staging	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-11-02 10:28:43 -08:00
target	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2014-10-21 13:06:38 -07:00
tc	…
thermal	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2014-10-24 11:21:43 -07:00
thunderbolt	…
tty	tty: serial: 8250: omap: add dma support	2014-11-05 19:13:34 -08:00
uio	uio: Export definition of struct uio_device	2014-10-02 21:35:54 -07:00
usb	USB-serial fixes for v3.18-rc3	2014-10-29 09:24:42 -07:00
uwb	…
vfio	IOMMU Updates for Linux v3.18	2014-10-15 07:23:49 +02:00
vhost	…
video	Merge branch '3.18/omapdss-fixes' into 3.18/fbdev-fixes	2014-10-30 14:53:49 +02:00
virt	…
virtio	One cc: stable commit, the rest are a series of minor cleanups which have	2014-10-18 10:25:09 -07:00
vlynq	…
vme	…
w1	…
watchdog	watchdog: meson: remove magic value for reboot	2014-10-20 21:09:17 +02:00
xen	xen/pci: Allocate memory for physdev_pci_device_add's optarr	2014-10-23 16:24:02 +01:00
zorro	…
Kconfig	…
Makefile	…