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Linux kernel
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Add a MAINTAINERS entry for the SpacemiT K1 I2C driver and its DT binding.
Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
I volunteered as maintainer of the DesignWare I2C driver, so update my
entry from reviewer to maintainer.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
The email address bounced. I couldn't find a newer one in recent git history,
so delete this email entry.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Extend the K1 I2C properties by including generic i2c-controller schema.
and this will enable it to do the DT validation check later.
Signed-off-by: Yixun Lan <dlan@gentoo.org>
Reviewed-by: Troy Mitchell <troy.mitchell@linux.spacemit.com>
Tested-by: Alex Elder <elder@riscstar.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
The MR1.CKS field is 3 bits wide and all the possible values (from 0 to
7) are valid. This is true for all the SoCs currently integrated in
upstream Linux. Take into account CKS=7 which allows setting bus
frequencies lower than 50KHz. This may be useful at least for debugging.
Fixes: d982d6651419 ("i2c: riic: remove clock and frequency restrictions")
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
My address is going to bounce soon and I won't have access to the
Synopsys datasheets so I'm going step down being a maintainer for this
driver.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Update email address to @oss.qualcomm.com for both the maintainers
from qualcomm, Viken dadhani and Mukesh Kumar Savaliya.
Signed-off-by: Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Pull i2c fixes from Wolfram Sang:
- i801: drop superfluous WDT entry for Birch
- rtl9300:
- fix channel number check in probe
- check data length boundaries in xfer
- drop broken SMBus quick operation
* tag 'i2c-for-6.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: rtl9300: remove broken SMBus Quick operation support
i2c: rtl9300: ensure data length is within supported range
i2c: rtl9300: fix channel number bound check
i2c: i801: Hide Intel Birch Stream SoC TCO WDT
Pull EDAC fix from Borislav Petkov:
- Remove a misplaced dma_free_coherent() call in altera_edac
* tag 'edac_urgent_for_v6.17_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
EDAC/altera: Delete an inappropriate dma_free_coherent() call
i2c-host-fixes for v6.17-rc5
- i801: fix device IDs
- in rtl9300:
- fix channel number check in probe
- check data length boundaries in xfer
- drop unsupported SMBus quick operation
Pull timer fix from Ingo Molnar:
"Fix a severe slowdown regression in the timer vDSO code related to the
while() loop in __iter_div_u64_rem(), when the AUX-clock is enabled"
* tag 'timers-urgent-2025-09-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
vdso/vsyscall: Avoid slow division loop in auxiliary clock update
dma_free_coherent() must only be called if the corresponding
dma_alloc_coherent() call has succeeded. Calling it when the allocation fails
leads to undefined behavior.
Delete the wrong call.
[ bp: Massage commit message. ]
Fixes: 71bcada88b0f3 ("edac: altera: Add Altera SDRAM EDAC support")
Signed-off-by: Salah Triki <salah.triki@gmail.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Dinh Nguyen <dinguyen@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/aIrfzzqh4IzYtDVC@pc
Remove the SMBus Quick operation from this driver because it is not
natively supported by the hardware and is wrongly implemented in the
driver.
The I2C controllers in Realtek RTL9300 and RTL9310 are SMBus-compliant
but there doesn't seem to be native support for the SMBus Quick
operation. It is not explicitly mentioned in the documentation but
looking at the registers which configure an SMBus transaction, one can
see that the data length cannot be set to 0. This suggests that the
hardware doesn't allow any SMBus message without data bytes (except for
those it does on it's own, see SMBus Block Read).
The current implementation of SMBus Quick operation passes a length of
0 (which is actually invalid). Before the fix of a bug in a previous
commit, this led to a read operation of 16 bytes from any register (the
one of a former transaction or any other value.
This caused issues like soft-bricked SFP modules after a simple probe
with i2cdetect which uses Quick by default. Running this with SFP
modules whose EEPROM isn't write-protected, some of the initial bytes
are overwritten because a 16-byte write operation is executed instead of
a Quick Write. (This temporarily soft-bricked one of my DAC cables.)
Because SMBus Quick operation is obviously not supported on these
controllers (because a length of 0 cannot be set, even when no register
address is set), remove that instead of claiming there is support. There
also shouldn't be any kind of emulated 'Quick' which just does another
kind of operation in the background. Otherwise, specific issues occur
in case of a 'Quick' Write which actually writes unknown data to an
unknown register.
Fixes: c366be720235 ("i2c: Add driver for the RTL9300 I2C controller")
Cc: stable@vger.kernel.org # v6.13+
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Tested-by: Sven Eckelmann <sven@narfation.org>
Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz> # On RTL9302C based board
Tested-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20250831100457.3114-4-jelonek.jonas@gmail.com
Pull locking fix from Ingo Molnar:
"Fix an 'allocation from atomic context' regression in the futex
vmalloc variant"
* tag 'locking-urgent-2025-09-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
futex: Move futex_hash_free() back to __mmput()
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