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Commit Graph

2876 Commits

Author SHA1 Message Date
Martin Sperl
07bce09e11 spi: bcm2835aux: change initialization order and switch to platform_get_irq
Change the initialization order of the HW so that the interrupt
is only requested after the HW is initialized

Also the use of irq_of_parse_and_map is replaced by platform_get_irq.

Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-16 15:35:33 +01:00
Martin Sperl
72aac02b37 spi: bcm2835aux: fixed bad data on longer transfers
There are strange issues with the auxiliary spi device that result
in "lost" data in the RX path if the fifo is filled by too much
(even though the status register is checked if new data can get filled
in).

This has been observed primarily for the interrupt case.
Polling works fine, probably because the RX fifo is pulled immediately
when in the tight polling loop.

For that reason we have to limit the pending bytes to less than 15
when filling the fifo in interrupt mode.

There also was an issue returning the "wrong" last 1/2 bytes
of a transfer when the transfer is not a multiple of 3 bytes.
(this impacted polling and interrupt modes)

Also fixed an overflow in the estimation of the transfer time used
to decide if we run in interrupt or polling mode (found with the
spi-bcm2835.c driver originally).

Reported-by: Georgii Staroselskii <georgii.staroselskii@emlid.com>
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-16 15:35:33 +01:00
Martin Sperl
1ea29b39f4 spi: bcm2835aux: add bcm2835 auxiliary spi device driver
The bcm2835 has 2 auxiliary spi bus masters spi1 and spi2.

This implements the driver to enable these devices.

The driver does not implement native chip-selects but uses
the aribtrary GPIO-chip-selects provided by the spi-chipselect.

Note that this driver relies on the fact that
the clock is implemented by the clk-bcm2835-aux driver,
which enables/disables the HW block when requesting/releasing
the clock.

Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-07 11:42:57 +01:00
Mark Brown
c5992f610f Merge remote-tracking branches 'spi/topic/ti-qspi', 'spi/topic/xcomm' and 'spi/topic/xlp' into spi-next 2015-08-31 14:45:45 +01:00
Mark Brown
c92ec7c7ae Merge remote-tracking branches 'spi/topic/s3c64xx', 'spi/topic/sg', 'spi/topic/sh-msiof', 'spi/topic/spidev' and 'spi/topic/stats' into spi-next 2015-08-31 14:45:41 +01:00
Mark Brown
2ca0a9d80c Merge remote-tracking branches 'spi/topic/mtk', 'spi/topic/pxa2xx', 'spi/topic/qspi', 'spi/topic/rockchip' and 'spi/topic/s3c24xx' into spi-next 2015-08-31 14:45:36 +01:00
Mark Brown
18c558ec74 Merge remote-tracking branches 'spi/topic/dw', 'spi/topic/fsl-espi', 'spi/topic/img-spfi' and 'spi/topic/mpc512x-psc' into spi-next 2015-08-31 14:45:32 +01:00
Mark Brown
9d05943e79 Merge remote-tracking branches 'spi/topic/atmel', 'spi/topic/bcm2835', 'spi/topic/bcm63xx-hsspi' and 'spi/topic/davinci' into spi-next 2015-08-31 14:45:29 +01:00
Mark Brown
8e42ac814c Merge remote-tracking branch 'spi/topic/dma' into spi-next 2015-08-31 14:45:28 +01:00
Mark Brown
bc64509949 Merge remote-tracking branch 'spi/topic/core' into spi-next 2015-08-31 14:45:27 +01:00
Mark Brown
af211211e3 Merge remote-tracking branches 'spi/fix/bcm2835', 'spi/fix/bitbang', 'spi/fix/img-spfi', 'spi/fix/omap2-mcspi', 'spi/fix/orion' and 'spi/fix/xilinx' into spi-linus 2015-08-31 14:45:23 +01:00
Koji Matsuoka
fe78d0b769 spi: sh-msiof: Fix FIFO size to 64 word from 256 word
The upper limit of Tx/Rx FIFO size is 64 word by the
specification of H/W. This patch corrects to 64 word from 256 word.

Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-08-31 14:42:40 +01:00
Axel Lin
37c5db7938 spi: fsl-(e)spi: Fix checking return value of devm_ioremap_resource
devm_ioremap_resource() returns ERR_PTR on error.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-30 12:14:36 +01:00
Kamlakant Patel
d8c80d49cf spi/xlp: SPI controller driver for Netlogic XLP SoCs
Add SPI Master controller driver for the SPI interface on XLP8XX,
XLP3XX, XLP2XX, XLP9XX and XLP5XX family of Netlogic XLP MIPS64 processors.

Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-28 18:22:19 +01:00
Heiner Kallweit
e9abb4db8d spi: fsl-espi: add runtime PM
Add runtime PM and use autosuspend instead of suspending the
SPI controller after each transfer.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-28 18:15:18 +01:00
Heiner Kallweit
3c5395b66f spi: fsl-(e)spi: simplify cleanup code
Now that most cleanup is done automatically the remove functions
can be significantly simplified.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-28 18:15:18 +01:00
Heiner Kallweit
4178b6b1b5 spi: fsl-(e)spi: migrate to using devm_ functions to simplify cleanup
Migrate fsl-espi and fsl-spi to using the managed devm_ functions
for resource handling. This simplifies the cleanup.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-28 18:15:18 +01:00
Leilk Liu
152933244a spi: mediatek: fix SPI_CMD_PAUSE_IE macro error
enable pause interrupt should use SPI_CMD_PAUSE_IE MACRO,
so fix it.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-27 20:31:00 +01:00
Stefan Brüns
63ab645f4d spi: check bits_per_word in spi_setup
This allows drivers for devices connected via SPI to check if the
controller supports a given bits_per_word value during setup.
Currently any BPW value is accepted durings setup, and transfers
are rejected later.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-26 18:58:29 +01:00
Leilk Liu
2ce0acf567 spi: mediatek: replace *_time name
This patch replaces *_time name in mtk_spi_prepare_transfer().

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-25 18:48:23 +01:00
Leilk Liu
13da5a0b72 spi: mediatek: add PM clk_prepare_enable fail flow
This patch adds PM clk_prepare_enable fail flow.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-25 18:48:23 +01:00
Leilk Liu
50f8fec216 spi: mediatek: replace int with u32, delete TAB and define MTK_SPI_PAUSE_INT_STATUS marco
this patch replaces int with u32, deletes TAB, and defines
MTK_SPI_PAUSE_INT_STATUS marco.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-25 18:48:23 +01:00
Leilk Liu
dd69a0a69c spi: mediatek: add linux/io.h include file
mediatek spi driver uses readl/writel, so add linux/io.h,
even so it's implicitly imported by spi/spi.h

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-25 18:48:23 +01:00
Jonas Gorski
f4d8622377 spi/bcm63xx-hsspi: add support for dual spi read/write
Add support for dual read/writes on spi-bcm63xx-hsspi. This has been
tested with a s25fl129p1 dual read capable spi flash, with a nice speed
improvement:

serial read:

root@OpenWrt:/# time dd if=/dev/mtd4 of=/dev/null bs=8192
2032+0 records in
2032+0 records out
real    0m 4.39s
user    0m 0.00s
sys     0m 1.55s

dual read:

root@OpenWrt:/# time dd if=/dev/mtd4 of=/dev/null bs=8192
2032+0 records in
2032+0 records out
real    0m 3.09s
user    0m 0.00s
sys     0m 1.56s

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-25 17:33:49 +01:00
Michael van der Westhuizen
c4fe57f762 spi: dw: Allow interface drivers to limit data I/O to word sizes
The commit dd11444327 ("spi: dw-spi: Convert 16bit accesses to 32bit
accesses") changed all 16bit accesses in the DW_apb_ssi driver to 32bit.
This, unfortunately, breaks data register access on picoXcell, where the
DW IP needs data register accesses to be word accesses (all other
accesses appear to be OK).

This change introduces a new master variable to allow interface drivers
to specify that 16bit data transfer I/O is required.  This change also
introduces the ability to set this variable via device tree bindings in
the MMIO interface driver.  Both the core and the MMIO interface driver
default to the current 32bit behaviour.

Before this change, on a picoXcell pc3x3:
 spi_master spi32766: interrupt_transfer: fifo overrun/underrun
 m25p80 spi32766.0: error -5 reading 9f
 m25p80: probe of spi32766.0 failed with error -5

After this change:
 m25p80 spi32766.0: m25p40 (512 Kbytes)

Fixes: dd11444327 ("spi: dw-spi: Convert 16bit accesses to 32bit accesses")
Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-21 10:25:28 -07:00
Mark Brown
7dc9fbc342 spi: Fall back to master maximum speed if no slave speed specified
If a slave appears with no maximum transfer speed specified fall back to
using the maximum for the master instead.  It's questionable if we
should let slaves do this but let's be defensive.

Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-21 10:24:04 -07:00
Leilk Liu
a71d6ea6d3 spi: mediatek: use BIT() to instead of SPI_CMD_*_OFFSET
This patch removes SPI_CMD_*_OFFSET defines, and uses the BIT(x)
defines instead.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-20 11:16:12 -07:00
Leilk Liu
af57937e86 spi: medaitek: revise quirks compatibility style
The quirks are true/false, so define these as bool.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-20 11:09:48 -07:00
Leilk Liu
44f636da4e spi: mediatek: fix spi incorrect endian usage
TX_ENDIAN/RX_ENDIAN bits define whether to reverse the endian
order of the data DMA from/to memory. The endian order should
keep the same with cpu endian.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-20 11:09:47 -07:00
Vignesh R
f682c4ffd2 spi: ti-qspi: use 128 bit transfer mode where possible
TI QSPI has four 32 bit data regsiters which can be used to transfer 16
bytes of data at once. The register group QSPI_SPI_DATA_REG_3,
QSPI_SPI_DATA_REG_2, QSPI_SPI_DATA_REG_1 and QSPI_SPI_DATA_REG is
treated as a single 128-bit word for shifting data in and out. The bit
at QSPI_SPI_DATA_REG_3[31] position is the first bit to be shifted out
in case of 128 bit transfer mode. Therefore the first byte to be written
to flash should be at QSPI_SPI_DATA_REG_3[31-25] position.
Instead of writing 1 byte at a time when interacting with spi-nor flash,
make use of all the four registers so that 16 bytes can be transferred
in one go. This reduces number of register writes and Word Complete
interrupts for a given transfer message size, thereby increasing the
write performance.

Without this patch the raw flash write speed is ~100KB/s, with this
patch the write speed increases to ~400 kB/s on DRA74 EVM.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-20 10:56:42 -07:00
Leilk Liu
c5e5cd28d7 spi: mediatek: remove redundant clock in prepare_hardware/unprepare_hardware
clock in prepare_hardware/unprepare_hardware is redundant
with pm_runtime, so remove them.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-19 10:24:18 -07:00
Martin Sperl
ca861dd0c5 spi: bcm2835: set up spi-mode before asserting cs-gpio
When using reverse polarity for clock (spi-cpol) on a device
the clock line gets altered after chip-select has been asserted
resulting in an additional clock beat, which confuses hardware.

This did not show when using native-CS, as the same register
is used to control cs as well as polarity, so the changes came
into effect at the same time. Unfortunately this is not true
with gpio-cs.

To avoid this situation this patch moves the setup of polarity
(spi-cpol and spi-cpha) outside of the chip-select into
prepare_message, which is run prior to asserting chip-select.

Also fixes resetting 3-wire mode after use of rx-mode, so that
a 3-Wire sequence TX, RX, TX works as well (right now it runs
TX, RX, RX instead)

Reported-by: Noralf Tronnes <noralf@tronnes.org>
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-14 19:09:09 +01:00
Ricardo Ribalda Delgado
74346841e6 spi/spi-xilinx: Fix spurious IRQ ACK on irq mode
The ACK of an inexistent IRQ can trigger an spurious IRQ that breaks the
txrx logic. This has been observed on axi_quad_spi:3.2 core.

This patch only ACKs IRQs that have not been Acknowledge jet.

Reported-by: Edward Kigwana <ekigwana@scires.com>
Tested-by: Edward Kigwana <ekigwana@scires.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-08-14 16:35:19 +01:00
Leilk Liu
39ba928f8b spi: Mediatek: fixup cpu_to_le32 incorrect usage
writel() already does a cpu_to_le32 conversion, so
remove cpu_to_le32().

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-13 14:16:16 +01:00
Ricardo Ribalda Delgado
16ea9b8ac4 spi/spi-xilinx: Fix mixed poll/irq mode
Once the module process a transfer in irq mode, the next poll transfer
will not work because the transmitter is left in inhibited state.

Fixes: 22417352f6 (Use polling mode on small transfers)
Reported-by: Edward Kigwana <ekigwana@scires.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-08-13 12:29:23 +01:00
Nadav Haklai
38d6211e85 spi: orion: On a38x, implement "50MHZ SPI AC timing" Erratum No. FE-9144572
Description:
On Armada 38x, the device SPI interface supports frequencies of up to
50 MHz. However, due to this erratum, when the device core clock is
250 MHz and the SPI interfaces is configured for 50MHz SPI clock and
CPOL=CPHA=1, there might occur data corruption on reads from the SPI
device.

Workaround:
Work in one of the following configurations:
1. Set CPOL=CPHA=0 in "SPI Interface Configuration Register".
2. Set TMISO_SAMPLE value to 0x2 in "SPI Timing Parameters 1 Register"
before setting the interface.

[gregory.clement@free-electrons.com}: port to v4.2-rc, use
is_errata_50mhz_ac instead of using a new ARMADA_380_SPI spi type.

Signed-off-by: Nadav Haklai <nadavh@marvell.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-08-11 17:21:08 +01:00
Leilk Liu
7abc01b346 spi: mediatek: fix endian warnings
This patch fixes endian warnings detected by sparse:
- sparse: incorrect type in argument 1 (different base types)
	  expected unsigned int [unsigned] val
	  got restricted __le32 [usertype] <noident>
- sparse: incorrect type in argument 1 (different base types)
	  expected unsigned int [unsigned] val
	  got restricted __le32 [usertype] <noident>

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-11 17:11:29 +01:00
Axel Lin
e4001885ca spi: mt65xx: Fix module alias
Remove extra space and make the alias matches driver name.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-11 10:21:26 +01:00
Alexandre Belloni
bdbbd38106 spi: atmel: remove useless include
Definitions from linux/platform_data/atmel.h are not used, remove the
include.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-10 19:07:04 +01:00
kbuild test robot
4299aaaa5d spi: mediatek: mtk_spi_driver can be static
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-07 17:34:48 +01:00
Leilk Liu
a568231f46 spi: mediatek: Add spi bus for Mediatek MT8173
This patch adds basic spi bus for MT8173.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-07 14:35:13 +01:00
Sifan Naeem
9176c6657b spi: img-spfi: fix kbuild test robot warning
drivers/spi/spi-img-spfi.c: In function 'img_spfi_setup':
drivers/spi/spi-img-spfi.c:446: warning: 'ret' may be used
uninitialized in this function.

Fixes: commit b03ba9e314 ("spi: img-spfi: fix multiple calls to request gpio")
Signed-off-by: Sifan Naeem <sifan.naeem@imgtec.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-08-06 12:26:01 +01:00
Jarkko Nikula
757fe8d514 spi: spi-pxa2xx: Remove unused legacy null dma buffer and allocation for it
Remove null_dma_buf variable and extra allocation for it. It is not needed
since commit 6356437e65 ("spi: spi-pxa2xx: remove legacy PXA DMA bits").

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-05 10:27:27 +01:00
Sifan Naeem
b03ba9e314 spi: img-spfi: fix multiple calls to request gpio
spfi_setup may be called many times by the spi framework, but
gpio_request_one can only be called once without freeing, repeatedly
calling gpio_request_one will cause an error to be thrown, which
causes the request to spi_setup to be marked as failed.

We can have a per-spi_device flag that indicates whether or not the
gpio has been requested. If the gpio has already been requested use
gpio_direction_output to set the direction of the gpio.

Fixes: 8c2c8c03cd ("spi: img-spfi: Control CS lines with GPIO")
Signed-off-by: Sifan Naeem <sifan.naeem@imgtec.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-08-04 18:46:54 +01:00
Axel Lin
94e5c23d3c spi: pxa2xx: Add terminating entry for pxa2xx_spi_pci_compound_match
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-04 18:20:13 +01:00
Colin Ian King
89a6356676 spi: spidev: fix inconsistent indenting
Fix inconsistent indenting in spidev_open, no functional change.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-04 17:51:32 +01:00
Jarkko Nikula
f47da2400e spi: spi-pxa2xx: Remove unused legacy PXA DMA API channel numbers
These became unused by the commit 6356437e65
("spi: spi-pxa2xx: remove legacy PXA DMA bits").

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-08-03 17:13:51 +01:00
Jarkko Nikula
34cadd9c1b spi: pxa2xx: Add support for Intel Sunrisepoint
Major difference in LPSS SPI between Intel Sunrisepoint PCH and earlier
platforms is an integrated DMA (iDMA) engine. iDMA is an IP that is private
for each LPSS host controller (UART/SPI/I2C). Other differences are private
register space offset, a few private registers that are in different
location and FIFO thresholds.

Intel Sunrisepoint LPSS SPI and iDMA devices are probed and registered in
MFD layer as platform devices. Here these compound devices are detected by
matching against known PCI IDs. This allows us to share
pxa2xx_spi_acpi_get_pdata() for setting up the platform data instead of
duplicating it in MFD part.

This patch adds configuration for Intel Sunrisepoint LPSS SPI, above
detection and DMA filter function that picks the DMA channel only from an
associated iDMA block.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-07-31 19:13:33 +01:00
Javier Martinez Canillas
98c7863c36 spi: xcomm: Export I2C module alias information
The I2C core always reports the MODALIAS uevent as "i2c:<client name"
regardless if the driver was matched using the I2C id_table or the
of_match_table. So the driver needs to export the I2C table and this
be built into the module or udev won't have the necessary information
to auto load the correct module when the device is added.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-07-31 18:14:57 +01:00
Martin Sperl
0122a51830 spi: bcm2835: fix overflow in calculation of transfer time
This resulted in the use of polling mode when other approaches
(dma or interrupts) would have been more appropriate.

Happened for transfers longer than 477 bytes.

Reported-by: Noralf Tronnes <noralf@tronnes.org>
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-07-29 18:22:04 +01:00