Commit graph

283 commits

Author SHA1 Message Date
Tom Rini
b11f634b1c Driver model: make some udevice fields private
Driver model: Rename U_BOOT_DEVICE et al.
 dtoc: Tidy up and add more tests
 ns16550 code clean-up
 x86 and sandbox minor fixes for of-platdata
 dtoc prepration for adding build-time instantiation
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Merge tag 'dm-pull-5jan21' of git://git.denx.de/u-boot-dm into next

Driver model: make some udevice fields private
Driver model: Rename U_BOOT_DEVICE et al.
dtoc: Tidy up and add more tests
ns16550 code clean-up
x86 and sandbox minor fixes for of-platdata
dtoc prepration for adding build-time instantiation
2021-01-05 22:34:43 -05:00
Tom Rini
720620e691 Prepare v2021.01-rc5
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Merge tag 'v2021.01-rc5' into next

Prepare v2021.01-rc5

Signed-off-by: Tom Rini <trini@konsulko.com>
2021-01-05 16:20:26 -05:00
Simon Glass
65e25bea59 dm: Rename DM_GET_DRIVER() to DM_DRIVER_GET()
In the spirit of using the same base name for all of these related macros,
rename this to have the operation at the end. This is not widely used so
the impact is fairly small.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-05 12:26:35 -07:00
Simon Glass
20e442ab2d dm: Rename U_BOOT_DEVICE() to U_BOOT_DRVINFO()
The current macro is a misnomer since it does not declare a device
directly. Instead, it declares driver_info record which U-Boot uses at
runtime to create a device.

The distinction seems somewhat minor most of the time, but is becomes
quite confusing when we actually want to declare a device, with
of-platdata. We are left trying to distinguish between a device which
isn't actually device, and a device that is (perhaps an 'instance'?)

It seems better to rename this macro to describe what it actually is. The
macros is not widely used, since boards should use devicetree to declare
devices.

Rename it to U_BOOT_DRVINFO(), which indicates clearly that this is
declaring a new driver_info record, not a device.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-05 12:26:35 -07:00
Igor Opaniuk
f23c706863 toradex: hand over maintainership
Hand over maintainership of Toradex SoMs (that I was responsible of) to
Oleksandr because of my resignation from Toradex, as such I will
have no immediate involvement with these modules and as a result not
able to continue maintaining these boards.

CC: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Acked-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
2020-12-26 14:56:09 +01:00
Simon Glass
8a8d24bdf1 dm: treewide: Rename ..._platdata variables to just ..._plat
Try to maintain some consistency between these variables by using _plat as
a suffix for them.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 16:51:09 -07:00
Simon Glass
caa4daa2ae dm: treewide: Rename 'platdata' variables to just 'plat'
We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).

Rename some of the latter variables to end with 'plat' for consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 16:51:08 -07:00
Tom Rini
19ea606109 Merge https://gitlab.denx.de/u-boot/custodians/u-boot-imx 2020-12-08 09:53:03 -05:00
Igor Opaniuk
89f7d08b2a colibri-imx8x: add implementation for board_mem_get_layout
Add implementation of board_mem_get_layout for overriding the memory
layout.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-12-06 15:31:37 +01:00
Igor Opaniuk
5d39967dcf apalis-imx8x: add implementation for board_mem_get_layout
Add implementation of board_mem_get_layout for overriding the memory
layout.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-12-06 15:31:37 +01:00
Igor Opaniuk
90311be09f apalis-imx8: add implementation for board_mem_get_layout
Add implementation of board_mem_get_layout for overriding the memory
layout.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Acked-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
2020-12-06 15:31:37 +01:00
Igor Opaniuk
a51fdba3fa board: toradex: add apalis-imx8x 2gb wb it v1.1a module support
This commit adds initial support for the Toradex Apalis iMX8X 2GB WB
IT V1.1A System on Module support [1].

Boot log:
U-Boot 2020.10-02940-g894aebb7e8-dirty (Oct 22 2020 - 09:43:57 +0300)
CPU:   NXP i.MX8QXP RevB A35 at 1200 MHz at 30C
DRAM:  2 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from MMC... OK
In:    serial@5a070000
Out:   serial@5a070000
Err:   serial@5a070000
Model: Toradex Apalis iMX8 QuadXPlus 2GB Wi-Fi / BT IT V1.1A,
Serial# 06617018
Net:   eth0: ethernet@5b040000 [PRIME]
Hit any key to stop autoboot:  0

Functionality wise the following is known to be working:
  - eMMC and MMC/SD card
  - Ethernet (*)
  - GPIOs
  - I2C

Unfortunately, there is no USB functionality for the i.MX 8QXP as of
yet.

* With the SCU FW from the latest Toradex BSP 5.0.0 (SCU FW 1.5.1)
ETH PHY encounters bring up problems after reset, this will be fixed
soon on SCU FW side.

[1] https://www.toradex.com/computer-on-modules/apalis-arm-family/nxp-imx-8x
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Acked-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
2020-12-06 15:31:37 +01:00
Marcel Ziswiler
72a1b9a977 verdin-imx8mm: automatic ram size detection
Implement board_phys_sdram_size() to automatically detect Verdin iMX8M
Mini DualLite 1GB vs. Verdin iMX8M Mini Quad 2GB.

Note: This only works if we keep using similar RAM chips!

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
2020-12-06 15:31:37 +01:00
Marcel Ziswiler
2a1a2559fb toradex: tdx-cfg-clock: fix i.mx 8m mini interactive
Now with them first Verdin iMX8M Mini DualLite modules in for bring-up
we got clarity how is_cpu_type() actually behaves.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
2020-12-06 15:31:37 +01:00
Max Krummenacher
b8eecbac6a verdin-imx8mm: spl: enable pca9450 i2c level translator
Enable PCA9450 i2c level translator, as this is used for the
on module ADC.

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
2020-12-06 15:31:37 +01:00
Max Krummenacher
423ca964c3 verdin-imx8mm: implement hardware version detection
And select the correct devicetree accordingly by setting the variant
environment variable.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
2020-12-06 15:31:37 +01:00
Max Krummenacher
7d43807d6c verdin-imx8mm: spl: switch to pca9450 pmic
V1.1A HW switched the PMIC from BD71837 to PCA9450.

- Disable combined DVS in PCA9450_BUCK123_DVS.
- Increase DDR Voltage to 0.95V as we use a 1.5GHz RAM.
- Configure WDOG_B behaviour.

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
2020-12-06 15:31:37 +01:00
Marcel Ziswiler
a5b5ad4d85 toradex: tdx-cfg-clock: add new i.mx 8m mini/plus skus
Add new i.MX 8M Mini/Plus SKUs to ConfigBlock handling:

0058: Verdin iMX8M Plus Quad 4GB Wi-Fi / BT IT

0059: Verdin iMX8M Mini Quad 2GB IT

0060: Verdin iMX8M Mini DualLite 1GB WB IT

0061: Verdin iMX8M Plus Quad 2GB

Rename existing SKU (use correct one):
Verdin iMX8M Nano SoloLite 1GB -> Verdin iMX8M Nano Quad 1GB Wi-Fi

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
2020-12-06 15:31:37 +01:00
Marcel Ziswiler
1b56cd868e colibri_t30: disable rs232 serial transceiver forceoff pins
Use gpio_early_init_uart() function to disable RS232 serial transceiver
ForceOFF# pins on Iris.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2020-12-04 13:21:15 -07:00
Marcel Ziswiler
4ba4bd0f87 apalis/colibri_t30: avoid uart input from floating pins
Avoid UART input from floating RX pins on UARTB and UARTC (Colibri T30)
and UARTB, UARTC and UARTD (Apalis T30).

Note: Floating pins may cause spurious break conditions potentially
interrupting U-Boot's autoboot.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2020-12-04 13:21:15 -07:00
Marcel Ziswiler
a6094e1b0a colibri_t30: fix spi1 and uart2/3 resp. uartb/c pinmuxing
Fix SPI1 and UART2/3 resp. UARTB/C pinmuxing.

Note: The former was illegally muxing multiple SoC balls onto the same
internal SoC signal which caused rather strange behaviour regarding
the RS232 serial transceiver ForceOFF# pins as available on Iris.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2020-12-04 13:21:15 -07:00
Marcel Ziswiler
bfe682e9dd apalis/colibri_t30: add comment about tristate and input vs. output pinmuxing
Add pinmuxing comment stating that TRISTATE means the output driver is
tri-stated and INPUT means the input driver is enabled vs. OUTPUT where
it is disabled.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2020-12-04 13:21:15 -07:00
Philippe Schenker
bf46474e21 apalis-imx8qm: rename all occurences to apalis-imx8
The Toradex product is called apalis-imx8 consisting of SoM with
i.MX8QM and i.MX8QP SoCs.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-09-17 14:41:33 +02:00
Philippe Schenker
08b6a60ee8 colibri-imx8qxp: rename all occurences to colibri-imx8x
The Toradex product is called colibri-imx8x consisting of SoM with
i.MX8QXP and i.MX8DX SoCs.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-09-17 14:41:26 +02:00
Igor Opaniuk
b4c9cd6875 colibri_imx7: wrap video specific funcs with ifdefs
Wrap video specific functionality with ifdefs.

Fixes: 195011b24d("colibri-imx7: fix splash logo drawing")
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-09-17 14:39:09 +02:00
Igor Opaniuk
e6fd30dd9e toradex: drop legacy show_boot_logo function and use splashscreen
Drop show_boot_logo legacy function, as splashscreen functionality can
be used instead.

Fixes: d324189772("toradex: common: show boot logo")
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-09-17 14:39:09 +02:00
Igor Opaniuk
1310660f5c colibri_imx7: use splashcreen value instead of legacy function
Set proper splashscreen env value instead of calling legacy function
to show embed boot logo.

Fixes: 195011b24d("colibri-imx7: fix splash logo drawing")
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-09-17 14:39:09 +02:00
Igor Opaniuk
f37aab99f2 colibri-imx6ull: use splashcreen value instead of legacy function
Set proper splashscreen env value instead of calling legacy function
to show embed boot logo.

Fixes: 391c712dde("colibri-imx6ull: show boot logo")
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-09-17 14:39:09 +02:00
Igor Opaniuk
195011b24d colibri-imx7: fix splash logo drawing
1. Configure white on black for video console.
2. Enable printing bmp logo during late board init stage.
3. Use iomux configuration from device tree.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-07-27 14:01:32 +02:00
Igor Opaniuk
391c712dde colibri-imx6ull: show boot logo
1. Show boot logo embed in U-Boot blob.
2. Drop iomux configration for LCD, and use the one provided in device
tree.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-07-27 14:01:32 +02:00
Igor Opaniuk
a5de86c1db ARM: dts: imx7-colibri: multiple node updates
1. Move u-boot specific nodes to u-boot dts include: legacy lcdif
node and aliases.
2. Add iomux configuration for LCD.
3. Drop un-needed u-boot,dm-pre-reloc for alias node.
4. Fix display-timings, use the one from Toradex downstream kernel [1]

[1]: https://git.toradex.com/cgit/linux-toradex.git/tree/arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi?h=toradex_4.9-2.3.x-imx#n206
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-07-27 14:01:32 +02:00
Igor Opaniuk
d324189772 toradex: common: show boot logo
Add function for showing boot logo, embed into u-boot blob.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-07-27 14:01:32 +02:00
Igor Opaniuk
306ecc8431 verdin-imx8mm: add EEPROM support for carrier board
Enable these Kconfig symbols:
TDX_CFG_BLOCK_EXTRA=y
TDX_HAVE_EEPROM_EXTRA=y

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-07-27 14:00:36 +02:00
Igor Opaniuk
717fa2c819 toradex: tdx-cfg-block: add carrier board info printing
Add carrier board info printing during boot time:

U-Boot 2020.07-rc4-02435-g1756e05 (Jun 22 2020 - 22:43:59 +0300)

CPU:   Freescale i.MX8MMQ rev1.0 at 1200 MHz
....
Carrier: Toradex Verdin Development Board V1.0A, Serial# 10622780
Verdin iMX8MM #

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-07-27 14:00:36 +02:00
Igor Opaniuk
db4ab6d453 toradex: tdx-cfg-clock: add migration routine from PID8
Add migration routine from PID8 pre-stored values on EEPROM
(including sane value checks).

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-07-27 14:00:36 +02:00
Igor Opaniuk
0c6b5588ef toradex: tdx-cfg-block: add support for EEPROM
This introduces support for EEPROM as a storage for the main Toradex
config block and additional config blocks on extra EEPROM chips (on
carrier board or video adapters).

To enable EEPROM as a storage for the main config block:
TDX_HAVE_EEPROM=y.

For additional EEPROMs please enable this Kconfig symbol:
TDX_CFG_BLOCK_EXTRA=y.

Information about existing EEPROM chips is provided via Device Tree
using aliases.

You can also write configuration for the carrier board using
create_carrier subcommand for cfgblock. Example:

Verdin iMX8MM # cfgblock create_carrier
Supported carrier boards:
UNKNOWN CARRIER                     = [0]
Verdin Carrier Board                = [1]
Choose your carrier board (provide ID): 1
Enter carrier board version (e.g. V1.1B): V1.0A
Enter carrier board serial number: 10622780

Also with barcode:
Verdin iMX8MM # cfgblock create carrier -y 0156100010622780

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-07-27 14:00:36 +02:00
Igor Opaniuk
26921f5853 toradex: tdx-cfg-block: add carrier boards and display adapters
Add defines for supported carrier boards and display adapters.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-07-27 14:00:36 +02:00
Igor Opaniuk
c2e969378d toradex: tdx-cfg-block: add EEPROM read/store wrappers
These functions wrap functionality for storing config blocks in EEPROM.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
2020-07-27 14:00:36 +02:00
Masahiro Yamada
b75d8dc564 treewide: convert bd_t to struct bd_info by coccinelle
The Linux coding style guide (Documentation/process/coding-style.rst)
clearly says:

  It's a **mistake** to use typedef for structures and pointers.

Besides, using typedef for structures is annoying when you try to make
headers self-contained.

Let's say you have the following function declaration in a header:

  void foo(bd_t *bd);

This is not self-contained since bd_t is not defined.

To tell the compiler what 'bd_t' is, you need to include <asm/u-boot.h>

  #include <asm/u-boot.h>
  void foo(bd_t *bd);

Then, the include direcective pulls in more bloat needlessly.

If you use 'struct bd_info' instead, it is enough to put a forward
declaration as follows:

  struct bd_info;
  void foo(struct bd_info *bd);

Right, typedef'ing bd_t is a mistake.

I used coccinelle to generate this commit.

The semantic patch that makes this change is as follows:

  <smpl>
  @@
  typedef bd_t;
  @@
  -bd_t
  +struct bd_info
  </smpl>

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-07-17 09:30:13 -04:00
Peng Fan
3c41728d80 imx8m: Refactor the OPTEE memory removal
Current codes assume the OPTEE address is at the end of first DRAM bank.
Adjust the process to allow OPTEE in the middle of first bank.

When OPTEE memory is removed from first bank, it may split the first bank
to two banks, adjust the MMU table for the split case,
Since the default CONFIG_NR_DRAM_BANKS is 4, it is enough, just enlarge
i.MX8MP evk to default to avoid issue.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Silvano di Ninno <silvano.dininno@nxp.com>
Tested-by: Silvano di Ninno <silvano.dininno@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
2020-07-14 15:23:48 +08:00
Marcel Ziswiler
3450f626ba colibri_pxa270: add mmc platform data
Add MMC platform data.

While at it also fix trivial checkpatch.pl issues.

Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>
2020-06-30 11:13:11 -04:00
Igor Opaniuk
c46443dd85 colibri_t20: change maintainer
Take over maintainership for Colibri T20 module.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Acked-by: Lucas Stach <dev@lynxeye.de>
2020-06-18 13:15:02 -07:00
Simon Glass
cd93d625fd common: Drop linux/bitops.h from common header
Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 21:19:23 -04:00
Simon Glass
c05ed00afb common: Drop linux/delay.h from common header
Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 21:19:23 -04:00
Simon Glass
f7ae49fc4f common: Drop log.h from common header
Move this header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 21:19:18 -04:00
Simon Glass
0914011310 command: Remove the cmd_tbl_t typedef
We should not use typedefs in U-Boot. They cannot be used as forward
declarations which means that header files must include the full header to
access them.

Drop the typedef and rename the struct to remove the _s suffix which is
now not useful.

This requires quite a few header-file additions.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 18:36:55 -04:00
Simon Glass
691d719db7 common: Drop init.h from common header
Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 17:33:33 -04:00
Simon Glass
4d72caa5b9 common: Drop image.h from common header
Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 17:33:33 -04:00
Simon Glass
90526e9fba common: Drop net.h from common header
Move this header out of the common header. Network support is used in
quite a few places but it still does not warrant blanket inclusion.

Note that this net.h header itself has quite a lot in it. It could be
split into the driver-mode support, functions, structures, checksumming,
etc.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 17:33:31 -04:00
Philippe Schenker
f72e48ba4d board: apalis_imx6: Add KSZ9131 phy skew settings
This patch adds skew register settings for KSZ9131. It checks first
which phy is on the board and then applies the correct skew settings.

Skew settings calculation for the KSZ9131:
The i.MX6 SoC has an output skew tolerance of -100ps to 900ps. All
PCB traces where routed exactly the same length so we can calculate
the skew settings without taking the length into consideration. The
traces are all length matched.

RXC skew (PHY to MAC):
- We use the 2ns DLL controlled delay on the PHY
- We do not use the skew registers

This results in the following values:

		RXC
PHY fixed Delay	2000ps
PHY Added Delay	0ps
T_setup_R min	2.00ns
T_setup_R typ	2.00ns
T_setup_R max	2.00ns
T_hold_R min	1.60ns
T_hold_R typ	2.00ns
T_hold_R max	2.40ns

That means we are well within RGMII specs.

TXC skew (MAC to PHY):
- We use the 2ns DLL controlled delay on the PHY
- We then subtract ~0.6ns with TXD[0:3] and TXC clock pad skew
  register in a resulting ~1.4ns delay.

This results in the following values under consideration of the
tolerances:

		TXC min	TXC typ	TXC max
MAC min		-100ps	-100ps	-100ps
MAC max		900ps	900ps	900ps
PHY fixed Delay	2000ps	2000ps	2000ps
PHY added Delay	-340ps	-600ps	-859ps
T_setup_T min	1.56ns	1.30ns	1.04ns
T_setup_T typ	2.06ns	1.80ns	1.54ns
T_setup_T max	2.56ns	2.30ns	2.04ns
T_hold_T min	1.04ns	1.30ns	1.56ns
T_hold_T typ	1.94ns	2.20ns	2.46ns
T_hold_T max	2.84ns	3.10ns	3.36ns

This shows that T_hold_T min and T_setup_T min times are out of spec
for RGMII timing. However the KSZ9131 has a minimal value for this time
of 0.8ns which is met under all circumstances.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
2020-05-01 13:46:22 +02:00