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Star64_linux/include/linux/platform_data
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Andy Shevchenko d7dba6be0f dmaengine: dw: Remove misleading is_private property 
The commit a9ddb575d6

   ("dmaengine: dw_dmac: Enhance device tree support")

introduces is_private property in uncertain understanding what does it mean.

First of all, documentation defines DMA_PRIVATE capability as

Documentation/crypto/async-tx-api.txt:
  The DMA_PRIVATE capability flag is used to tag dma devices that should not be
  used by the general-purpose allocator. It can be set at initialization time
  if it is known that a channel will always be private. Alternatively,
  it is set when dma_request_channel() finds an unused "public" channel.

  A couple caveats to note when implementing a driver and consumer:
  1/ Once a channel has been privately allocated it will no longer be
     considered by the general-purpose allocator even after a call to
     dma_release_channel().
  2/ Since capabilities are specified at the device level a dma_device with
     multiple channels will either have all channels public, or all channels
     private.

Documentation/driver-api/dmaengine/provider.rst:
  - DMA_PRIVATE
    The devices only supports slave transfers, and as such isn't available
    for async transfers.

The capability had been introduced by the commit 59b5ec2144

  ("dmaengine: introduce dma_request_channel and private channels")

and some code didn't changed from that times ever.

Taking into consideration above and the fact that on all known platforms
Synopsys DesignWare DMA engine is attached to serve slave transfers,
the DMA_PRIVATE capability must be enabled for this device unconditionally.
Otherwise, as rightfully noticed in drivers/dma/at_xdmac.c:
  /*
   * Without DMA_PRIVATE the driver is not able to allocate more than
   * one channel, second allocation fails in private_candidate.
   */
because of of a caveats mentioned in above documentation excerpts.

So, remove conditional around DMA_PRIVATE followed by removal leftovers.

If someone wonders, DMA_PRIVATE can be not used if and only if the all channels
of the DMA controller are supposed to serve memory-to-memory like operations.
For example, EP93xx has two controllers, one of which can only perform
memory-to-memory transfers

Note, this change doesn't affect dmatest to be able to test such controllers.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> (maintainer:SERIAL DRIVERS)
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-01-07 17:57:13 +05:30
..
jz4740 MIPS: jz4740: Move jz4740_nand.h header to include/linux/platform_data/jz4740 2018-07-18 10:10:23 +02:00
media media: sii9234: remove unused header 2018-07-30 08:38:06 -04:00
txx9 MIPS: txx9: Move the ndfc.h header to include/linux/platform_data/txx9 2018-07-18 10:10:23 +02:00
x86 platform/x86: asus-wmi: export function for evaluating WMI methods 2018-10-31 16:11:40 +02:00
ad5449.h
ad5755.h
ad5761.h
ad7266.h
ad7291.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ad7298.h
ad7303.h
ad7791.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ad7793.h
ad7887.h
adau17x1.h
adau1977.h
adp5588.h gpio: adp5588: move header file out of I2C realm 2017-05-29 13:36:45 +02:00
adp8860.h backlight: adp8860: Move header file out of I2C realm 2017-07-06 08:56:08 +01:00
adp8870.h video: adp8870: move header file out of I2C realm 2017-07-06 08:58:39 +01:00
ads1015.h hwmon: (ads1015) move header file out of I2C realm 2017-06-11 17:08:19 -07:00
ads7828.h
ams-delta-fiq.h Input: ams_delta_serio: Get FIQ buffer from platform_data 2018-07-02 23:05:14 -07:00
apds990x.h misc: apds990x: move header file out of I2C realm 2017-05-25 18:25:00 +02:00
arm-ux500-pm.h
asoc-imx-ssi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
asoc-kirkwood.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
asoc-mx27vis.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
asoc-palm27x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
asoc-s3c.h
asoc-s3c24xx_simtec.h
asoc-ti-mcbsp.h ARM: OMAP2+: Cleanup omap_mcbsp_dev_attr and other legacy data 2018-02-14 10:28:13 -08:00
asoc-ux500-msp.h
at24.h eeprom: at24: fix a whitespace error in platform data 2018-01-01 19:40:50 +01:00
at91_adc.h
ata-pxa.h
ata-samsung_cf.h
atmel.h ARM: SoC platform updates 2017-07-04 14:34:51 -07:00
b53.h net: dsa: b53: Extend platform data to include DSA ports 2018-05-20 18:59:34 -04:00
bcmgenet.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bd6107.h
bh1770glc.h misc: bh1770glc: move header file out of I2C realm 2017-05-25 18:25:00 +02:00
brcmfmac.h
clk-da8xx-cfgchip.h clk: davinci: New driver for TI DA8XX CFGCHIP clocks 2018-03-20 10:16:26 -07:00
clk-davinci-pll.h clk: davinci: New driver for davinci PLL clocks 2018-03-20 10:16:26 -07:00
clk-integrator.h
clk-lpss.h
clk-st.h clk: x86: Add ST oscout platform clock 2018-05-17 12:44:06 +02:00
clk-u300.h
cpuidle-exynos.h
crypto-atmel.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crypto-ux500.h
cyttsp4.h
davinci_asp.h ASoC: davinci-mcasp: Implement configurable dismod handling 2018-11-28 12:41:31 +00:00
db8500_thermal.h
dma-atmel.h
dma-coh901318.h
dma-dw.h dmaengine: dw: Remove misleading is_private property 2019-01-07 17:57:13 +05:30
dma-ep93xx.h dmaengine: ep93xx: Return proper enum in ep93xx_dma_chan_direction 2018-10-02 20:11:00 +05:30
dma-hsu.h
dma-imx-sdma.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dma-imx.h
dma-mcf-edma.h dmaengine: fsl-edma: add ColdFire mcf5441x edma support 2018-09-11 12:06:39 +05:30
dma-mmp_tdma.h
dma-mv_xor.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dma-s3c24xx.h
dma-ste-dma40.h
dmtimer-omap.h clocksource: timer-ti-dm: Add timer ops to the platform data structure 2018-02-22 10:53:59 -08:00
ds620.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dwc3-omap.h
edma.h
efm32-spi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
efm32-uart.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ehci-sh.h usb: ehci-sh: convert to SPDX identifiers 2018-09-10 19:58:49 +02:00
elm.h
emif_plat.h
eth-netx.h
fsa9480.h
g762.h
gpio-ath79.h
gpio-davinci.h gpio: davinci: restore a way to manually specify the GPIO base 2018-11-26 16:45:10 +05:30
gpio-dwapb.h gpio: dwapb: Fix rework support for 1 interrupt per port A GPIO 2018-05-28 09:45:27 +02:00
gpio-htc-egpio.h gpio: htc-gpio: Include the right header 2018-03-19 01:50:28 +01:00
gpio-omap.h ARM: SoC platform updates for 4.20 2018-10-29 15:37:33 -07:00
gpio_backlight.h backlight: gpio_backlight: Delete pdata inversion 2017-08-07 17:11:28 +01:00
gpmc-omap.h
hsmmc-omap.h mmc: omap_hsmmc: Delete platform data GPIO CD and WP 2018-10-08 11:40:43 +02:00
hwmon-s3c.h
i2c-cbus-gpio.h
i2c-davinci.h i2c/ARM: davinci: Deep refactoring of I2C recovery 2017-12-31 00:09:39 +01:00
i2c-designware.h
i2c-gpio.h i2c: gpio: move header to platform_data 2018-05-17 16:27:09 +02:00
i2c-hid.h HID: i2c-hid: Add vddl regulator control 2018-06-25 15:12:42 +02:00
i2c-imx.h
i2c-mux-gpio.h i2c: mux: gpio: move header to platform_data 2018-05-17 16:27:52 +02:00
i2c-mux-reg.h
i2c-ocores.h i2c: ocores: update my email address 2018-08-24 14:46:43 +02:00
i2c-omap.h i2c: omap: move header to platform_data 2018-05-17 16:27:58 +02:00
i2c-pca-platform.h i2c: pca-platform: move header to platform_data 2018-05-17 16:27:58 +02:00
i2c-pxa.h ARM: pxa: move header file out of I2C realm 2017-11-28 22:49:30 +01:00
i2c-s3c2410.h
i2c-xiic.h i2c: xiic: move header to platform_data 2018-05-17 16:27:59 +02:00
ina2xx.h hwmon: (ina2xx) fix sysfs shunt resistor read access 2018-08-26 17:45:25 -07:00
intel-mid_wdt.h
intel-spi.h
invensense_mpu6050.h
iommu-omap.h iommu/omap: Move data structures to omap-iommu.h 2017-04-20 16:33:58 +02:00
irda-pxaficp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
irda-sa11x0.h
isl9305.h regulator: isl9305: fix array size 2017-04-10 17:31:17 +01:00
itco_wdt.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
keyboard-pxa930_rotary.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
keyboard-spear.h
keypad-ep93xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
keypad-nomadik-ske.h
keypad-omap.h
keypad-pxa27x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
keypad-w90p910.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
keyscan-davinci.h
lcd-mipid.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
leds-kirkwood-netxbig.h
leds-kirkwood-ns2.h
leds-lm355x.h
leds-lm3642.h
leds-lp55xx.h
leds-omap.h
leds-pca963x.h leds: pca963x: Add bindings to invert polarity 2017-05-14 13:01:29 +02:00
leds-s3c24xx.h
lm3630a_bl.h
lm3639_bl.h
lm8323.h Input: lm8323 - move header file out of I2C realm 2017-05-22 17:23:46 -07:00
lp855x.h
lp8727.h
lp8755.h
ltc4245.h hwmon: (ltc4245) move header file out of I2C realm 2017-06-11 17:08:19 -07:00
lv5207lp.h
macb.h
max197.h
max732x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
max3421-hcd.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
max6639.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
max6697.h
mcs.h Input: mcs - move header file out of I2C realm 2017-05-22 17:26:57 -07:00
mdio-bcm-unimac.h net: phy: mdio-bcm-unimac: Allow specifying platform data 2017-07-31 14:40:58 -07:00
mdio-gpio.h net: phy: mdio-gpio: Add phy_ignore_ta_mask to platform data 2018-12-08 21:33:30 -08:00
mfd-mcp-sa11x0.h
microchip-ksz.h dsa: add DSA switch driver for Microchip KSZ9477 2017-05-31 20:56:31 -04:00
mlxreg.h platform_data/mlxreg: Document fixes for hotplug device 2018-05-12 15:38:40 -07:00
mmc-davinci.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmc-esdhc-imx.h mmc: sdhci: imx: Use the slot GPIO descriptor 2018-12-17 08:26:24 +01:00
mmc-mxcmmc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmc-omap.h
mmc-pxamci.h mmc: pxa: Use GPIO descriptor for power 2018-12-17 08:26:24 +01:00
mmc-s3cmci.h mmc: s3cmci: Use the slot GPIO descriptor 2018-12-17 08:26:24 +01:00
mmc-sdhci-s3c.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmp_audio.h
mmp_dma.h dmaengine: pxa: use a dma slave map 2018-06-18 21:28:44 +02:00
mouse-pxa930_trkball.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mtd-davinci-aemif.h ARM: davinci: unduplicate aemif support 2018-07-10 15:39:27 +05:30
mtd-davinci.h mtd: rawnand: davinci: store the core chipselect number in platform data 2018-05-02 14:58:30 +05:30
mtd-mxc_nand.h
mtd-nand-omap2.h This pull request contains the following core changes: 2017-11-22 20:46:06 -10:00
mtd-nand-pxa3xx.h mtd: nand: remove useless fields from pxa3xx NAND platform data 2018-03-02 21:51:41 +01:00
mtd-nand-s3c2410.h mtd: nand: Rename nand.h into rawnand.h 2017-08-13 10:11:49 +02:00
mtd-orion_nand.h mtd: rawnand: orion_nand: Kill orion_nand_data.dev_ready() 2018-07-18 10:10:12 +02:00
mv88e6xxx.h net: dsa: mv88e6xxx: Add support for EEPROM via platform data 2018-05-20 18:58:27 -04:00
mv_usb.h USB: EHCI: ehci-mv: remove private_init 2018-09-20 13:07:55 +02:00
net-cw1200.h
nfcmrvl.h NFC: nfcmrvl: allow gpio 0 for reset signalling 2017-06-18 23:58:00 +02:00
ntc_thermistor.h hwmon: (ntc_thermistor) use a table to lookup the thermistor type 2018-12-16 15:13:21 -08:00
nxp-nci.h
omap-twl4030.h
omap-wd-timer.h
omap1_bl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
omapdss.h drm: omapdrm: Remove unused default display name support 2017-06-02 10:57:10 +03:00
pca953x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pca954x.h i2c: mux: pca954x: move header file out of I2C realm 2017-08-14 11:54:03 +02:00
pcf857x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pcmcia-pxa2xx_viper.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
phy-da8xx-usb.h ARM: da8xx: use platform data for CFGCHIP syscon regmap 2018-02-19 16:19:25 +05:30
pinctrl-single.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pixcir_i2c_ts.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pm33xx.h ARM: OMAP2+: sleep33/43xx: Add RTC-Mode support 2018-07-09 23:01:34 -07:00
pwm_omap_dmtimer.h
pxa2xx_udc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxa_sdhci.h mmc: sdhci: pxav3: Delete GPIO handling 2018-10-08 11:40:43 +02:00
regulator-haptic.h
remoteproc-omap.h
rtc-ds2404.h
rtc-v3020.h
s3c-hsotg.h
s3c-hsudc.h
sa11x0-serial.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sc18is602.h fix a series of Documentation/ broken file name references 2018-06-15 18:10:01 -03:00
sdhci-pic32.h
serial-imx.h
serial-omap.h
serial-sccnxp.h
shmob_drm.h drm: shmobile: convert to SPDX identifiers 2018-09-14 13:54:02 +03:00
sht3x.h
shtc1.h
si5351.h clk: si5351: Add DT property to enable PLL reset 2017-12-21 18:09:18 -08:00
simplefb.h
sky81452-backlight.h
spi-clps711x.h
spi-davinci.h spi: davinci: Remove chip select GPIO pdata 2018-09-11 17:37:15 +01:00
spi-ep93xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spi-imx.h ARM: imx: Update spi_imx platform data to reflect current state 2018-04-18 11:11:23 +08:00
spi-mt65xx.h spi: mediatek: adjust register to enhance time accuracy 2017-06-13 19:42:31 +01:00
spi-nuc900.h
spi-omap2-mcspi.h ARM: OMAP2+: Cleanup omap2_spi_dev_attr and other legacy data 2018-02-14 10:28:12 -08:00
spi-s3c64xx.h spi: s3c64xx: add SPDX identifier 2018-01-08 15:38:06 +00:00
ssm2518.h
st33zp24.h
st_sensors_pdata.h iio: imu: st_lsm6dsx: add i2c embedded controller support 2018-11-16 18:32:33 +00:00
syscon.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tc35876x.h gpu: drm: tc35876x: move header file out of I2C realm 2017-08-13 16:07:17 +02:00
tda9950.h drm/i2c: tda9950: add CEC driver 2018-04-24 10:44:25 +01:00
ti-aemif.h memory: aemif: add support for board files 2018-04-20 10:14:27 -07:00
ti-sysc.h bus: ti-sysc: Defer suspend as needed 2018-09-24 12:16:54 -07:00
touchscreen-s3c2410.h
tsc2007.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tsl2563.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tsl2772.h staging: iio: tsl2x7x/tsl2772: move out of staging 2018-05-12 12:40:04 +01:00
uio_dmem_genirq.h
uio_pruss.h
usb-davinci.h
usb-ehci-mxc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usb-ehci-orion.h
usb-musb-ux500.h
usb-mx2.h
usb-ohci-pxa27x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usb-ohci-s3c2410.h ARM: samsung: usb-ohci: move inline before return type 2017-07-12 16:26:05 -07:00
usb-omap.h
usb-omap1.h
usb-pxa3xx-ulpi.h
usb-s3c2410_udc.h
usb3503.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ux500_wdt.h
video-clcd-versatile.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
video-ep93xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
video-imxfb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
video-mx3fb.h
video-nuc900fb.h
video-pxafb.h
video_s3c.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
voltage-omap.h
wiznet.h
wkup_m3.h
zforce_ts.h