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The AMD Legacy I3C is having a problem with its IP, specifically with the
push-pull and open-drain pull-up registers. These registers need to be
manually programmed for every CCC submission to align with the duty cycle.
Therefore, add a quirk to address this issue.
Reviewed-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20241114110239.660551-3-Shyam-sundar.S-k@amd.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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Add support for runtime and system power management.
Handle clocks, resets, pads as part of suspend and resume.
Restore controller registers that could be lost due to suspend.
Finally add get and put calls appropriately in functions which
access controller : bus_init, do_daa, send_ccc_cmd, priv_xfers,
i2c_xfers, ibi and hot-join.
Signed-off-by: Aniket <aniketmaurya@google.com>
Link: https://lore.kernel.org/r/20240708062103.3296587-4-aniketmaurya@google.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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Add variables to store timing registers and other values.
These variables would be later used to restore registers
during resume without recomputation.
Signed-off-by: Aniket <aniketmaurya@google.com>
Link: https://lore.kernel.org/r/20240708062103.3296587-2-aniketmaurya@google.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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Besides the core clock, IP also has an apb interface clock.
Add an optional hook for the same.
Signed-off-by: Aniket <aniketmaurya@google.com>
Link: https://lore.kernel.org/r/20240628154618.327151-1-aniketmaurya@google.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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Since DW I3C IP master role always supports IBI, we don't need
to keep two variants of master ops and select one using this
property. Hence remove the code.
Signed-off-by: Aniket <aniketmaurya@google.com>
Link: https://lore.kernel.org/r/20240627034119.3938050-1-aniketmaurya@google.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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IBI_SIR_REQ_REJECT register is not present if the IP has
IC_HAS_IBI_DATA = 1 set. So don't rely on doing read-
modify-write op on this register.
Instead maintain a variable to store the sir reject mask
and use it to set IBI_SIR_REQ_REJECT.
Signed-off-by: Aniket <aniketmaurya@google.com>
Reviewed-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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Add hot-join support for dw i3c master controller.
By default, the hot-join acknowledgment is disabled, and the hardware will
automatically send the DISEC CCC when it receives the hot-join request.
Users can use the sys entry to enable it.
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20240429073624.256830-1-billy_tsai@aspeedtech.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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On the AST2600 i3c controller, we'll need to apply a workaround for a
hardware issue with IBI payloads.
Introduce a platform hook to allow dw i3c platform implementations to
modify the DAT entry in IBI enable/disable to allow this workaround in a
future change.
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/d5d76a8d2336d2a71886537f42e71d51db184df6.1680161823.git.jk@codeconstruct.com.au
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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This change adds support for receiving and dequeueing i3c IBIs.
By setting struct dw_i3c_master->ibi_capable before probe, a platform
implementation can select the IBI-enabled version of the i3c_master_ops,
enabling the global IBI infrastrcture for that controller.
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/79daeefd7ccb7c935d0c159149df21a6c9a73ffa.1680161823.git.jk@codeconstruct.com.au
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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In an upcoming change, we will want to store additional data about the
devices we have in the data address table.
Change the type of the DAT entries into a struct, which currently just
has the address data.
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/9dc0d9e2857e851a0cf04819df48e5d31921f83e.1680161823.git.jk@codeconstruct.com.au
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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The dw i3c core can be integrated into various SoC devices. Platforms
that use this core may need a little configuration that is specific to
that platform.
Add some infrastructure to allow platform-specific behaviour: common
probe/remove functions, a set of platform hook operations, and a pointer
for platform-specific data in struct dw_i3c_master. Move the common api
into a new (i3c local) header file.
Platforms will provide their own struct platform_driver, which allocates
struct dw_i3c_master, does any platform-specific probe behaviour, and
calls into the common probe.
A future change will add new platform support that uses this
infrastructure.
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20230331091501.3800299-2-jk@codeconstruct.com.au
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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