Commit Graph

138 Commits

Author SHA1 Message Date
Adam Ford
12ef801673 ARM: rmobile: beacon: Set CONFIG_RZ_G2 on Beacon boards
The board detection is incorrectly stating it's an rcar3 variant
instead of an RZ/G2 variant on all the r8a774*1_beacon boards.
Set the flag to correctly display as RZ/G2[M/N/H]

Signed-off-by: Adam Ford <aford173@gmail.com>
2021-06-24 20:22:31 +02:00
Marek Vasut
8f76c9d73a ARM: renesas: Scrub duplicate memory nodes from DT on Gen3
Scrub duplicate /memory@* node entries here. Some R-Car DTs might
contain multiple /memory@* nodes, however fdt_fixup_memory_banks()
either generates single /memory node or updates the first /memory
node. Any remaining memory nodes are thus potential duplicates.

However, it is not possible to delete all the memory nodes right
away, since some of those might not be DRAM memory nodes, but some
sort of other memory. Thus, delete only the memory nodes which are
in the R-Car3 DBSC ranges.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
2021-05-12 21:36:27 +02:00
Biju Das
3e5f3dbe3a arm: mach-rmobile: Add CPU info support for RZ/G2
Add CPU info support for RZ/G2 SoC's.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
2021-04-13 23:36:25 +02:00
Lad Prabhakar
9e346340d7 board: silinux: Enable recovery SPL for EK874 board
Enable building SPL for EK874 board which is based on R8A774C0 SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
2021-03-16 20:09:30 +01:00
Lad Prabhakar
07148c1899 arm: rmobile: Add Silicon Linux EK874 board support
The EK874 development kit from Silicon Linux is made of CAT874 (the main
board) and CAT875 (the sub board that goes on top of CAT874).

This patch adds the required board support to boot Si-Linux EK874 board
based on R8A774C0 SoC.

DTS files apart from r8a774c0-ek874-u-boot.dts and r8a774c0-u-boot.dtsi
have been imported from Linux kernel 5.11 commit f40ddce88593
("Linux 5.11").

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
2021-03-16 20:09:29 +01:00
Lad Prabhakar
220f308a5c pinctrl: renesas: Add support for R8A774C0
Renesas RZ/G2E (a.k.a. r8a774c0) is pin compatible with R-Car
E3 (a.k.a. r8a77990), however it doesn't have several automotive
specific peripherals.

This patch hooks R8A774C0 SoC with the pfc driver.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
2021-03-16 20:09:29 +01:00
Biju Das
5be85de6a8 arm: rmobile: Add HopeRun HiHope RZ/G2H board support
The HiHope RZ/G2H board from HopeRun consists of main board
(HopeRun HiHope RZ/G2H main board) and sub board(HopeRun
HiHope RZ/G2H sub board). The HiHope RZ/G2H sub board sits
below the HiHope RZ/G2H main board.

This patch adds the required board support to boot HopeRun HiHope
RZ/G2H board.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2021-03-16 20:09:29 +01:00
Biju Das
dca070c382 arm: rmobile: Add HopeRun HiHope RZ/G2N board support
The HiHope RZ/G2N board from HopeRun consists of main board
(HopeRun HiHope RZ/G2N main board) and sub board(HopeRun
HiHope RZ/G2N sub board). The HiHope RZ/G2N sub board sits
below the HiHope RZ/G2N main board.

This patch adds the required board support to boot HopeRun HiHope
RZ/G2N board.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2021-03-16 20:09:29 +01:00
Biju Das
b650c83825 arm: rmobile: Add HopeRun HiHope RZ/G2M board support
The HiHope RZ/G2M board from HopeRun consists of main board
(HopeRun HiHope RZ/G2M main board) and sub board(HopeRun
HiHope RZ/G2M sub board). The HiHope RZ/G2M sub board sits
below the HiHope RZ/G2M main board.

This patch adds the required board support to boot HopeRun HiHope
RZ/G2M board.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2021-03-16 20:09:29 +01:00
Tom Rini
2ae80437fb Merge branch '2021-02-02-drop-asm_global_data-when-unused'
- Merge the patch to take <asm/global_data.h> out of <common.h>
2021-02-15 10:16:45 -05:00
Adam Ford
0099dfd5e5 ARM: rmobile: Add Beacon EmbeddedWorks RZG2H Dev Kit
The Beacon EmbeddedWorks kit is based on the R8A774E1 SoC also
known as the RZ/G2H.

The kit consists of a SOM + Baseboard and supports microSD,
eMMC, Ethernet, a couple celular radios, two CAN interfaces,
Bluetooth and WiFi.  It shares much of the same design as
the RZ/G2M and RZ/G2N dev kits.

Signed-off-by: Adam Ford <aford173@gmail.com>
2021-02-07 21:12:57 +01:00
Adam Ford
6001b49920 ARM: rmobile: Add Beacon EmbeddedWorks RZG2N Dev Kit
The Beacon EmbeddedWorks kit is based on the R8A774B1 SoC also
known as the RZ/G2N.

The kit consists of a SOM + Baseboard and supports microSD,
eMMC, Ethernet, a couple celular radios, two CAN interfaces,
Bluetooth and WiFi.  It shares much of the same design as
the RZ/G2M dev kit.

Signed-off-by: Adam Ford <aford173@gmail.com>
2021-02-07 21:12:57 +01:00
Simon Glass
401d1c4f5d common: Drop asm/global_data.h from common header
Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-02-02 15:33:42 -05:00
Biju Das
975154bc2c pinctrl: renesas: r8a77951: Add R8A774E1 PFC support
Renesas RZ/G2H (r8a774e1) is pin compatible with R-Car H3 (r8a77951),
however it doesn't have several automotive specific peripherals. Add
a r8a77951 specific pin groups/functions along with common pin
groups/functions for supporting both r8a77951 and r8a774e1 SoC.

PFC changes are synced from mainline linux-5.9 commit
bbf5c979011a ("Linux 5.9").

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2020-11-22 12:49:22 +01:00
Biju Das
c5f3762588 pinctrl: renesas: r8a77965: Add R8A774B1 PFC support
Renesas RZ/G2N (r8a774b1) is pin compatible with R-Car M3-N (r8a77965),
however it doesn't have several automotive specific peripherals. Add
a r8a77965 specific pin groups/functions along with common pin
groups/functions for supporting both r8a77965 and r8a774b1 SoC.

PFC changes are synced from mainline linux-5.9 commit
bbf5c979011a ("Linux 5.9").

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2020-11-22 12:49:22 +01:00
Lad Prabhakar
a3c1fd6393 clk: renesas: Import R8A774C0 clock tables from Linux 5.9
Import RZ/G2E (R8A774C0) clock tables from Linux 5.9 commit
bbf5c979011a ("Linux 5.9").

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
2020-10-20 12:56:52 +02:00
Biju Das
e9d91b82fe clk: renesas: Add R8A774E1 clock tables
This sync's the RZ/G2H clock tables with mainline linux 5.9 commit
bbf5c979011a ("Linux 5.9").

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2020-10-20 12:56:52 +02:00
Biju Das
54db9e8b8f clk: renesas: Add R8A774B1 clock tables
This sync's the RZ/G2N clock tables with mainline linux 5.9 commit
bbf5c979011a ("Linux 5.9").

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2020-10-20 12:56:51 +02:00
Lad Prabhakar
051f1499c9 arm: renesas: Add config option for R8A774C0 SoC
Add config support for RZ/G2E (a.k.a R8A774C0) SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
2020-10-20 12:56:51 +02:00
Biju Das
aca749a90f arm: renesas: Add config option for R8A774E1 SoC
Add config support for RZ/G2H(a.k.a R8A774E1) SoC.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2020-10-20 12:56:46 +02:00
Biju Das
4e4c0e5e42 arm: renesas: Add config option for R8A774B1 SoC
Add config support for RZ/G2N(a.k.a R8A774B1) SoC.

Also fixed the alignment issue on R8A774A1 config.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2020-10-20 12:56:46 +02:00
Biju Das
aead065e0e arm: mach-rmobile: Mark the default s_init function as weak
Mark the default s_init function as weak, so that SoC's can
override it if needed, and it will still be discarded if unused.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2020-09-26 17:25:43 +02:00
Biju Das
7d7913689a arm: rmobile: Identify R8A7796 r1.3 SoC
Add support to identify R8A7796 r1.3 SoC.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
2020-09-26 17:25:43 +02:00
Simon Glass
e6385c7e9c Makefile: Rename ALL-y to INPUTS-y
When binman is in use, most of the targets built by the Makefile are
inputs to binman. We then need a final rule to run binman to produce the
final outputs.

Rename the variable to indicate this, and add a new 'inputs' target.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2020-07-28 19:30:39 -06:00
Adam Ford
59028798ab ARM: rmobile: Add Beacon EmbeddedWorks RZG2M Dev Kit
The Beacon EmbeddedWorks kit is based on the R8A774A1 SoC also
known as the RZ/G2M.

The kit consists of a SOM + Baseboard and supports microSD,
eMMC, Ethernet, a couple celular radios, two CAN interfaces,
Bluetooth and WiFi.

Signed-off-by: Adam Ford <aford173@gmail.com>
2020-07-25 14:19:26 +02:00
Adam Ford
dbabfcc873 ARM: renesas: Add basic R8A774A1 Support
In order to build boards based on the R8A774A1, there needs to
be a config option from which to enable other drivers and/or flags
for this SoC.

Signed-off-by: Adam Ford <aford173@gmail.com>
2020-07-25 11:16:39 +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
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
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
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
Simon Glass
9edefc2776 common: Move some cache and MMU functions out of common.h
These functions belong in cpu_func.h. Another option would be cache.h
but that code uses driver model and we have not moved these cache
functions to use driver model. Since they are CPU-related it seems
reasonable to put them here.

Move them over.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2019-12-02 18:23:55 -05:00
Simon Glass
1045315df0 common: Move get_ticks() function out of common.h
This function belongs in time.h so move it over and add a comment.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2019-12-02 18:23:13 -05:00
Marek Vasut
8cdb1ff33c ARM: rmobile: Temporarily disable PCI dma-ranges update
According to discussion in the Linux PCI list [1], the dma-ranges should
be continuous and describe the entire inbound window which the controller
can address and not take into account the possible DRAM holes.

Temporarily disable this code which updates the dma-ranges until this
meaning is sorted out.

[1] PCI: rcar: Do not abort on too many inbound dma-ranges

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-11-16 16:52:45 +01:00
Simon Glass
27084c03d3 spl: Allow tiny printf() to be controlled in SPL and TPL
At present there is only one control for this and it is used for both SPL
and TPL. But SPL might have a lot more space than TPL so the extra cost of
a full printf() might be acceptable.

Split the option into two, providing separate SPL and TPL controls. The
TPL setting defaults to the same as SPL.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-10-08 13:57:45 +08:00
Simon Glass
9fb625ce05 env: Move env_set() to env.h
Move env_set() over to the new header file.

Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
2019-08-11 16:43:41 -04:00
Marek Vasut
3ebb91914f ARM: renesas: Add R8A77980 V3H Condor board code
Add board code for the R8A77980 V3H Condor board.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-08-09 23:15:01 +02:00
Marek Vasut
57ede1a3d4 ARM: renesas: Add R8A77980 V3H platform code
Add a few bits of platform code to support R8A77980 V3H SoC.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-08-09 23:15:01 +02:00
Marek Vasut
b3db7be4e3 ARM: renesas: Update Gen3 PCIe dma-ranges before boot
Update "dma-ranges" DT property of all PCIe controllers in the system
with the up-to-date DRAM layout. This allows the PCIe controller take
full advantage of all the available DRAM.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-07-23 13:38:17 +02:00
Tom Rini
2a51e16bd5 configs: Make USE_TINY_PRINTF depend on SPL||TPL and be default
The USE_TINY_PRINTF symbol only changes things within SPL and TPL
builds, so make it depend on that support.  Next, make it default as
within these cases we should rarely have need of more advanced print
formats outside of the debug context.

To do this, in a few cases we need to correct our Kconfig dependencies
as we had cases of non-SPL targets select'ing this symbol.  Finally, in
the case of a few boards we really do need the full printf
functionality.

Signed-off-by: Tom Rini <trini@konsulko.com>
2019-07-13 11:11:29 -04:00
Marek Vasut
5602330df0 ARM: rmobile: Add recovery SPL for R-Car Gen3
Build an SPL which can be started via SCIF download mode on R-Car Gen3
and allows loading and executing U-Boot uImage with the next stage code.
This is also useful for starting e.g. ATF BL2, which inits the hardware
and returns to the U-Boot SPL, which can then load e.g. U-Boot proper.

The H3, M3-W, M3-N SoCs have plenty of SRAM for storing the U-Boot SPL
while the payload, e.g. ATF BL2, executes, so there is no problem here.

However, E3 and D3 have much less SRAM, hence the loader uses a trick
where it copies itself beyond the area used by BL2 and executes from
there. That area is 32kiB large and not enough to hold U-Boot SPL, BSS,
stack and malloc area, so the later two are placed at +0x4000 offset
from start of SRAM, another area not used by ATF BL2. To make things
even more complicated, the SCIF loader cannot load to the upper 32kiB
of the SRAM directly, hence the copying approach.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-05-21 22:15:31 +02:00
Trevor Woerner
1001502545 CONFIG_SPL_SYS_[DI]CACHE_OFF: add
While converting CONFIG_SYS_[DI]CACHE_OFF to Kconfig, there are instances
where these configuration items are conditional on SPL. This commit adds SPL
variants of these configuration items, uses CONFIG_IS_ENABLED(), and updates
the configurations as required.

Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Trevor Woerner <trevor@toganlabs.com>
[trini: Make the default depend on the setting for full U-Boot, update
more zynq hardware]
Signed-off-by: Tom Rini <trini@konsulko.com>
2019-05-18 08:15:35 -04:00
Chris Brandt
ba932bc846 ARM: dts: renesas: Add RZ/A1 GR-Peach board
Add board code and DTs for Renesas RZ/A1 SoC-based GR-Peach,
which is a cheap development platform with RZ/A1H SoC. The
DTs are imported from Linux 5.0.11, commit d5a2675b207d .

Currently supported are UART, ethernet and RPC SPI. The board
can be booted from RPC SPI by writing the u-boot.bin binary
to the beginning of the SPI NOR, e.g. using the "sf" command.
The board can also be booted via JTAG by setting text base to
0x20020000, loading u-boot.bin there via JTAG and executing it
from that address.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-05-07 05:41:32 +02:00
Chris Brandt
3529596442 ARM: dts: renesas: Add RZ/A1 platform code
Add platform code and DTs for Renesas RZ/A1 R7S72100 SoC.
Distinguishing feature of this SoC is that it has up to
10 MiB of on-SoC static RAM (SRAM).

The DTs are imported from Linux 5.0.11, commit d5a2675b207d .

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-05-07 05:41:32 +02:00
Marek Vasut
6b955cbaea ARM: rmobile: Always select pin control drivers on Gen3
To assure the pins on R-Car Gen3 SoCs are configured correctly, always
select pin control drivers on Gen3 SoCs.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-05-04 19:26:49 +02:00
Marek Vasut
c6435c317a pinctrl: renesas: Add R8A77965 pin control tables
Add pin control tables for R8A77965 from Linux 5.0 .

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-04-09 18:19:10 +02:00
Marek Vasut
933143997b clk: renesas: Add R8A77965 clock tables
Add clock tables for R8A77965 from Linux 5.0 , except for the
crit, R and Z clock, which are neither used nor supported by
the U-Boot clock framework yet.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-04-09 18:19:10 +02:00
Marek Vasut
ce417a2f23 ARM: rmobile: Add dedicated R8A77965 SoC support
Add dedicated entry for R8A77965 M3N SoC.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-04-09 18:19:10 +02:00
Marek Vasut
bdafee778d ARM: rmobile: Enable multi-DTB fit LZO compression
Enable LZO compression of the multi-DTB fitImages, since the U-Boot
with multiple DTs enabled is becoming quite large and the DTs can
be well compressed. The LZO compression saves almost 200 kiB on the
Salvator-X(S) and ULCB targets.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-04-09 18:19:10 +02:00
Marek Vasut
4fa8375ffe ARM: renesas: Save boot parameters passed in by ATF
The ATF can pass additional information via the first four registers,
x0...x3. The R-Car Gen3 with mainline ATF, register x1 contains pointer
to a device tree with platform information. Save these registers for
future use.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2019-04-09 18:19:09 +02:00