Commit graph

22 commits

Author SHA1 Message Date
Adam Ford
e53979cd34 i2c: rcar_i2c: Enable configuring SCL rise and fall times
The Linux i2c driver supports i2c-scl-rising-time-ns,
and i2c-scl-falling-time-ns, but U-Boot uses hard-coded values
for these values.

Update the calculation by fetching them from the device tree if
present and use the previous values as the default if they are
missing.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2021-09-28 06:34:14 +02:00
Simon Glass
41575d8e4c dm: treewide: Rename auto_alloc_size members to be shorter
This construct is quite long-winded. In earlier days it made some sense
since auto-allocation was a strange concept. But with driver model now
used pretty universally, we can shorten this to 'auto'. This reduces
verbosity and makes it easier to read.

Coincidentally it also ensures that every declaration is on one line,
thus making dtoc's job easier.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 08:00:25 -07:00
Lad Prabhakar
86a73b0905 i2c: rcar_i2c: Fix i2c read/write errors
commit 7c8f821e5d ("i2c: rcar_i2c: Set the slave address from
rcar_i2c_xfer") blindly called rcar_i2c_set_addr() with read argument
always set to 1 during xfer which introduced read/write errors, whereas
earlier rcar_i2c_read_common() called rcar_i2c_set_addr() with read set to
1 and rcar_i2c_write_common() called rcar_i2c_set_addr() with read set 0.

Fixes: 7c8f821e5d ("i2c: rcar_i2c: Set the slave address from rcar_i2c_xfer")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2020-10-01 05:41:44 +02:00
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
336d4615f8 dm: core: Create a new header file for 'compat' features
At present dm/device.h includes the linux-compatible features. This
requires including linux/compat.h which in turn includes a lot of headers.
One of these is malloc.h which we thus end up including in every file in
U-Boot. Apart from the inefficiency of this, it is problematic for sandbox
which needs to use the system malloc() in some files.

Move the compatibility features into a separate header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-02-05 19:33:46 -07:00
Simon Glass
f3d461521a i2c: Update drivers to use enum for speed
Convert the obvious uses of i2c bus speeds to use the enum.

Use livetree access for code changes.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27 07:24:02 +01:00
Ismael Luceno Cortes
c64eb297e7 i2c: rcar_i2c: Move FSDA check to rcar_i2c_recover
Cosmetic change.  Any call to the recover function would need to do the
same check afterwards, so it's sensible to make it part of the function.

Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com>
2019-03-08 05:53:40 +01:00
Ismael Luceno Cortes
7c8f821e5d i2c: rcar_i2c: Set the slave address from rcar_i2c_xfer
It needs to be done for both reads and writes, so do it at rcar_i2c_xfer
to avoid duplication.

Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08 05:53:33 +01:00
Ismael Luceno Cortes
ff4035be9b i2c: rcar_i2c: Don't mask errors with EREMOTEIO at rcar_i2c_xfer
Fix rcar_i2c_xfer return value, previously it was always returning
-EREMOTEIO when dealing with errors from calls to the read/write
functions.

Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08 05:53:23 +01:00
Ismael Luceno Cortes
3ad31eb1cc i2c: rcar_i2c: Fix sending of slave addresses
Do the reset before clearing the MSR, otherwise it may result in a read
or write operation instead if the start condition is repeated.

Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08 05:53:17 +01:00
Ismael Luceno Cortes
3b59eaef4f i2c: rcar_i2c: Add comments about registers & values
Document the meaning of macros related to registers and values to be
written to them.

Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08 05:53:11 +01:00
Ismael Luceno Cortes
4fcff08c4b i2c: rcar_i2c: Setup SCL/SDA delay at rcar_i2c_set_speed
Setting up the delay only needs to be done once; move it to
rcar_i2c_set_speed so it's done at initialization time.

Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08 05:53:03 +01:00
Marek Vasut
da53b0543d i2c: rcar_i2c: Add Gen3 SoC support
Add support for R-Car Gen3 SoCs into the driver, which encompases
the Gen3 SoC extra timing register handling and 64bit build fixes.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Heiko Schocher <hs@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-07 09:41:43 +01:00
Marek Vasut
a06a0ac36d i2c: rcar_i2c: Add DM and DT capable I2C driver
Add derivative of the rcar_i2c driver which is capable of
probing itself from DM and uses DT.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2018-05-20 12:06:54 +02:00
Marek Vasut
a4d9aafadb i2c: rcar_i2c: Remove the driver
Remove the rcar_i2c driver, since it's no longer used by any
board and will be superseded by a DM and DT capable variant.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2018-05-20 12:06:54 +02:00
Tom Rini
83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00
Simon Glass
2852709676 dm: i2c: Add a note to I2C drivers which need conversion
Maintainers need to be notified more directly of the need to convert these
drivers. Add a note to the top each affected file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2016-12-05 13:28:03 +01:00
Nobuhiro Iwamatsu
cd818a381d i2c: rcar_i2c: Fix order of restart and clear status
In case of repeated START condition, the restart has to be kicked
before clear status (MSR register). If it is kicked after clear status,
R-Car I2C may transfer data (TXD register) or receive data (RXD register)
instead of transferring slave address (MAR register).

Signed-off-by: Ryo Kataoka <ryo.kataoka.wt@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2014-11-10 06:47:37 +01:00
Nobuhiro Iwamatsu
da1ed0d20e rcar_i2c: Clear status before start master receive
Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2014-01-13 08:16:48 +01:00
Hisashi Nakamura
ad5e14ecdd rcar_i2c: Fix receiving wait condition
Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2014-01-13 08:16:22 +01:00
Nobuhiro Iwamatsu
1086bfa9f4 i2c: Add support for Renesas rcar
This supports i2c controller for Renesas rcar.

Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2013-10-17 07:20:25 +02:00