11 Jun, 2016
1 commit
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Add early i2c init function with conservative divider when the exact
clock rate is not available.Signed-off-by: Yuan Yao
Reviewed-by: York Sun
27 Nov, 2015
1 commit
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Use the correct function name in the function description.
Signed-off-by: Stefan Roese
Reviewed-by: Simon Glass
Cc: Heiko Schocher
06 Aug, 2015
5 commits
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Add a new I2C_MUX uclass. Devices in this class can multiplex between
several I2C buses, selecting them one at a time for use by the system.
The multiplexing mechanism is left to the driver to decide - it may be
controlled by GPIOs, for example.The uclass supports only two methods: select() and deselect().
The current mux state is expected to be stored in the mux itself since
it is the only thing that knows how to make things work. The mux can
record the current state and then avoid switching unless it is necessary.
So select() can be skipped if the mux is already in the correct state.
Also deselect() can be made a nop if required.Signed-off-by: Simon Glass
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Sometimes it is useful to be able to transfer a raw I2C message. This
happens when the chip address needs to be set manually, or when the data to
be sent/received is in another buffer.Add a function to provide access to this.
Signed-off-by: Simon Glass
Acked-by: Heiko Schocher -
Move the flags and struct definitions higher in the file so that we can
reference them with functions declared in the driver model section.Signed-off-by: Simon Glass
Acked-by: Heiko Schocher -
Add documentation for the @dev parameter.
Signed-off-by: Simon Glass
Acked-by: Heiko Schocher -
Add a way to dump the contents of an I2C message for debugging purposes.
Signed-off-by: Simon Glass
Acked-by: Heiko Schocher
11 Jun, 2015
1 commit
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Add the legacy i2c_reg_read/write() functions to the compatibility layer
so that they can be used when CONFIG_DM_I2C_COMPAT is defined.Signed-off-by: Simon Glass
Acked-by: Heiko Schocher
15 May, 2015
1 commit
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We can currently set this but there is no API function to get it. Add one.
Signed-off-by: Simon Glass
Reviewed-by: Joe Hershberger
Acked-by: Heiko Schocher
06 May, 2015
2 commits
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At present this driver has a few test features. They are needed for running
the driver model unit tests but are confusing and unnecessary if using
sandbox at the command line. Add a flag to enable the test mode, and don't
enable it by default.Signed-off-by: Simon Glass
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Add driver model versions of the legacy functions to read and write a
single byte register. These are a useful shortcut in many cases.Signed-off-by: Simon Glass
Acked-by: Heiko Schocher
17 Apr, 2015
1 commit
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Add a convenience function to access the private data that a uclass stores
for each of its devices. Convert over most existing uses for consistency
and to provide an example for others.Signed-off-by: Simon Glass
13 Feb, 2015
2 commits
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Make the driver model I2C API available always, even if driver model
is not enabled. This allows for a 'soft' switch-over, where drivers can
use the new structures in code which is compiled but not yet used. This
makes migration easier in some cases.Fix up the existing drivers which define their own 'struct i2c_msg'.
Signed-off-by: Simon Glass
Acked-by: Heiko Schocher -
As with i2c_read() and i2c_write(), add a dm_ prefix to the driver model
versions of these functions to avoid conflicts.Signed-off-by: Simon Glass
Acked-by: Heiko Schocher
30 Jan, 2015
5 commits
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These functions are useful in case the board calls them. Also fix a missing
parameter caused by applying the wrong patch (actually I failed to send v2
and applied v1 by mistake).Signed-off-by: Simon Glass
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At present we go through various contortions to store the I2C's chip
address in its private data. This only exists when the chip is active so
must be set up when it is probed. Until the device is probed we don't
actually record what address it will appear on.However, now that we can support per-child platform data, we can use that
instead. This allows us to set up the address when the child is bound,
and avoid the messy contortions.Unfortunately this is a fairly large change and it seems to be difficult to
break it down further.Signed-off-by: Simon Glass
Reviewed-by: Masahiro Yamada -
Rather than assuming that the chip offset length is 1, allow it to be
provided. This allows chips that don't use the default offset length to
be used (at present they are only supported by the command line 'i2c'
command which sets the offset length explicitly).Signed-off-by: Simon Glass
Acked-by: Heiko Schocher -
For boards which use multiple I2C devices, or for SOCs which support
multiple boards, we might want to convert these to driver model at different
times. At present this is difficult because we need to either use
CONFIG_DM_I2C for a board or not.Add a compatibility layer which implements the old API, thus allowing a
board to move to driver model for I2C without requiring that everything it
uses is moved in the same commit.Signed-off-by: Simon Glass
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Add a dm_ prefix to driver model I2C functions so that we can keep the old
ones around.This is a little unfortunate, but on reflection it is too difficult to
change the API. We can undo this rename when most boards and drivers are
converted to use driver model for I2C.Signed-off-by: Simon Glass
12 Dec, 2014
1 commit
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The uclass implements the same operations as the current I2C framework but
makes some changes to make it fit driver model better:- Remove the chip address from API calls
- Remove the address length from API calls
- Remove concept of 'current' I2C bus
- Drop all existing init functionsAcked-by: Heiko Schocher
Reviewed-by: Masahiro Yamada
Signed-off-by: Simon Glass
20 Feb, 2014
1 commit
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Adds support for set-speed on the OMAP24xx I2C Adapter.
Changes to omap24_i2c_write(...) for polling ARDY Bit from IRQ-Status.
Otherwise on a subsequent call the transfer of last byte from the
predecessor is aborted and therefore lost. For exmaple when
i2c_write(...) is followed by a i2c_setspeed(...) (which has to
deactivate and activate master for changing psc,...).Minor cosmetical changes.
Signed-off-by: Hannes Petermaier
Cc: Heiko Schocher
14 Nov, 2013
1 commit
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Since the required API is gpio which is enclosed with CONFIG_ATMEL_LEGACY use
that switch here.Signed-off-by: Andreas Bießmann
Acked-by: Heiko Schocher
17 Oct, 2013
1 commit
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(Interface is not quite the same as Phillips PCA9547.)
Signed-off-by: Michael Burr
Cc: Heiko Schocher
Cc: Michal Simek
20 Aug, 2013
1 commit
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The I2C_MULTI_BUS needs to be defined for correct I2C operation with
many software emulated I2C controllers.This fix restores correct value of the I2C_MULTI_BUS changed by following
commit:SHA1: 385c9ef5a7215b2b0c22836fee6c692dfc8559d7
i2c: add i2c_core and prepare for new multibus supportSigned-off-by: Lukasz Majewski
Cc: Heiko Schocher
24 Jul, 2013
2 commits
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The sandburst-specific i2c drivers have been deleted, conflict was just
over the SPDX conversion.Conflicts:
board/sandburst/common/ppc440gx_i2c.c
board/sandburst/common/ppc440gx_i2c.hSigned-off-by: Tom Rini
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Signed-off-by: Wolfgang Denk
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini
23 Jul, 2013
4 commits
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CONFIG_I2C_MUX is replaced through the new i2c multibus/multiadapter
framework, configured through CONFIG_SYS_I2C. As CONFIG_I2C_MUX
is only used on the keymile boards, and they are now completely
moved to the new framework, remove CONFIG_I2C_MUX.Signed-off-by: Heiko Schocher
Cc: Holger Brunck
Tested-By: Holger Brunck -
- added to soft_i2c driver new multibus/multiadpater support
- adapted all config files, which uses this driverSigned-off-by: Heiko Schocher
Cc: Simon Glass
Cc: Stephen Warren -
Signed-off-by: Heiko Schocher
Signed-off-by: Simon Glass
Cc: Henrik Nordström -
This Patch introduce the new i2c_core file, which holds
the I2C core functions, for the rework of the multibus/
multiadapter support.
Also adds changes in i2c.h for the new I2C multibus/multiadapter
support. This new support can be activated with the
CONFIG_SYS_I2C define.Signed-off-by: Heiko Schocher
Signed-off-by: Simon Glass
Cc: Mike Frysinger
Cc: Stephen Warren
08 Jan, 2013
1 commit
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Functions added to get the I2C bus number and reset I2C bus using
FDT node.Signed-off-by: Rajeshwari Shinde
Acked-by: Simon Glass
Acked-by: Heiko Schocher
Signed-off-by: Minkyu Kang
17 Sep, 2012
1 commit
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Support for multiple soft I2C buses.
Multibus I2C support is achieved by defining get_multi_{sda|scl}_pin
functions to switch between multiple "soft" I2C buses.Common definition of I2C_X I2C buses is provided at .
TEST HW:
Samsung's Exynos4210 evt.0.1 - Trats development boardSigned-off-by: Lukasz Majewski
Signed-off-by: Kyungmin Park
Cc: Heiko Schocher
Cc: Minkyu Kang
Acked-by: Heiko Schocher
11 Jan, 2012
1 commit
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* Since AT91 name schema was changed to ATMEL_BASE_xxx, I2C_SOFT
on AT91 devices fails with 'error: ATMEL_FIO_BASE undeclared'
* change ATMEL_PIO_BASE to ATMEL_BASE_PIOA will fix thisSigned-off-by: Jens Scharsig
28 Oct, 2011
1 commit
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cmd_date.c: In function ‘do_date’:
cmd_date.c:50:6: warning: variable ‘old_bus’ set but not used
[-Wunused-but-set-variable]Signed-off-by: Marek Vasut
Cc: Wolfgang Denk
Cc: Simon Glass
Cc: Mike Frysinger
05 Oct, 2011
1 commit
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This reverts commit 60ce53cf9f408d9ad721f8e7a87d6a564e6d5bac.
The commit causes build breakage for a number of boards. This results
from the fact that now the arguments of debug() actually get
referenced (even if there is hope that the compiler will optimize
away the debug() call). The obvious fix to that probem (change the
code to always declare the referenced variables and data structures)
increases the code size, and was this rejected. So it was decided to
revert this commit until a better solution is found.
02 Oct, 2011
1 commit
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Fix the following gcc4.6 problems:
cmd_date.c: In function ‘do_date’:
cmd_date.c:50:6: warning: variable ‘old_bus’ set but not used
[-Wunused-but-set-variable]
asix.c: In function ‘asix_init’:
asix.c:317:6: warning: variable ‘rx_ctl’ set but not used
[-Wunused-but-set-variable]
usb.c: In function ‘usb_parse_config’:
usb.c:331:17: warning: variable ‘ch’ set but not used
[-Wunused-but-set-variable]
usb.c: In function ‘usb_hub_port_connect_change’:
usb.c:1123:29: warning: variable ‘portchange’ set but not used
[-Wunused-but-set-variable]
usb.c: In function ‘usb_hub_configure’:
usb.c:1183:25: warning: variable ‘hubsts’ set but not used
[-Wunused-but-set-variable]
usb_storage.c: In function ‘usb_stor_CB_reset’:
usb_storage.c:466:6: warning: variable ‘result’ set but not used
[-Wunused-but-set-variable]Signed-off-by: Marek Vasut
28 Apr, 2011
1 commit
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To make sure that the mux can be configured a deblocking sequence
is done before the mux configuration. After the mux switch the new leaf
of, the i2c tree must be again deblocked.Signed-off-by: Stefan Bigler
Acked-by: Heiko Schocher
cc: Wolfgang Denk
cc: Detlev Zundel
cc: Prafulla Wadaskar
cc: Valentin Longchamp
cc: Holger Brunck
Signed-off-by: Valentin Longchamp
19 Apr, 2010
1 commit
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This patch adds a callpoint in i2c_init that allows board specific
i2c board initialization (typically for i2c bus reset) that is called
after i2c_init operations, allowing the i2c_board_late_init function
to use the pre-configured i2c bus speed and slave address.
29 Mar, 2010
1 commit
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and removed it from the .h file
Signed-off-by: Frans Meulenbroeks
13 Feb, 2010
1 commit
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* add's a warning to all files, which need update to new SoC access
* convert common files in cpu/../at91 and a lot of drivers to use
c stucture SoC accessSigned-off-by: Jens Scharsig
