Commit Graph

728 Commits

Author SHA1 Message Date
Andrey Zhizhikin 33478cc104 This is the 5.4.147 stable release
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Merge tag 'v5.4.147' into 5.4-2.3.x-imx

This is the 5.4.147 stable release

Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
2021-09-16 19:45:58 +00:00
Jeongtae Park 344a38789a regmap: fix the offset of register error log
[ Upstream commit 1852f5ed358147095297a09cc3c6f160208a676d ]

This patch fixes the offset of register error log
by using regmap_get_offset().

Signed-off-by: Jeongtae Park <jeongtae.park@gmail.com>
Link: https://lore.kernel.org/r/20210701142630.44936-1-jeongtae.park@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-09-15 09:47:26 +02:00
Andrey Zhizhikin 6602fc5788 This is the 5.4.119 stable release
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Merge tag 'v5.4.119' into 5.4-2.3.x-imx

This is the 5.4.119 stable release

Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
2021-05-14 20:43:43 +00:00
Meng Li d8897f7b22 regmap: set debugfs_name to NULL after it is freed
[ Upstream commit e41a962f82e7afb5b1ee644f48ad0b3aee656268 ]

There is a upstream commit cffa4b2122f5("regmap:debugfs:
Fix a memory leak when calling regmap_attach_dev") that
adds a if condition when create name for debugfs_name.
With below function invoking logical, debugfs_name is
freed in regmap_debugfs_exit(), but it is not created again
because of the if condition introduced by above commit.
regmap_reinit_cache()
	regmap_debugfs_exit()
	...
	regmap_debugfs_init()
So, set debugfs_name to NULL after it is freed.

Fixes: cffa4b2122f5 ("regmap: debugfs: Fix a memory leak when calling regmap_attach_dev")
Signed-off-by: Meng Li <Meng.Li@windriver.com>
Link: https://lore.kernel.org/r/20210226021737.7690-1-Meng.Li@windriver.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-14 09:44:17 +02:00
Andrey Zhizhikin d51b217cf8 This is the 5.4.102 stable release
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Merge tag 'v5.4.102' into 5.4-2.3.x-imx

This is the 5.4.102 stable release

Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
2021-03-04 20:26:33 +00:00
Bard Liao 2efbd63b6e regmap: sdw: use _no_pm functions in regmap_read/write
[ Upstream commit d288a5712ef961e16d588bbdb2d846e00b5ef154 ]

sdw_update_slave_status will be invoked when a codec is attached,
and the codec driver will initialize the codec with regmap functions
while the codec device is pm_runtime suspended.

regmap routines currently rely on regular SoundWire IO functions,
which will call pm_runtime_get_sync()/put_autosuspend.

This causes a deadlock where the resume routine waits for an
initialization complete signal that while the initialization complete
can only be reached when the resume completes.

The only solution if we allow regmap functions to be used in resume
operations as well as during codec initialization is to use _no_pm
routines. The duty of making sure the bus is operational needs to be
handled above the regmap level.

Fixes: 7c22ce6e21 ('regmap: Add SoundWire bus support')
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210122070634.12825-6-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 10:26:37 +01:00
Andrey Zhizhikin 82b5d3cd6b This is the 5.4.90 stable release
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Merge tag 'v5.4.90' into 5.4-2.3.x-imx

This is the 5.4.90 stable release

Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
2021-01-17 22:35:35 +00:00
Dan Carpenter 6f48409619 regmap: debugfs: Fix a reversed if statement in regmap_debugfs_init()
commit f6bcb4c7f366905b66ce8ffca7190118244bb642 upstream.

This code will leak "map->debugfs_name" because the if statement is
reversed so it only frees NULL pointers instead of non-NULL.  In
fact the if statement is not required and should just be removed
because kfree() accepts NULL pointers.

Fixes: cffa4b2122f5 ("regmap: debugfs: Fix a memory leak when calling regmap_attach_dev")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/X/RQpfAwRdLg0GqQ@mwanda
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-01-17 14:05:38 +01:00
Xiaolei Wang 480c5e9c7e regmap: debugfs: Fix a memory leak when calling regmap_attach_dev
commit cffa4b2122f5f3e53cf3d529bbc74651f95856d5 upstream.

After initializing the regmap through
syscon_regmap_lookup_by_compatible, then regmap_attach_dev to the
device, because the debugfs_name has been allocated, there is no
need to redistribute it again

unreferenced object 0xd8399b80 (size 64):
  comm "swapper/0", pid 1, jiffies 4294937641 (age 278.590s)
  hex dump (first 32 bytes):
	64 75 6d 6d 79 2d 69 6f 6d 75 78 63 2d 67 70 72
dummy-iomuxc-gpr
	40 32 30 65 34 30 30 30 00 7f 52 5b d8 7e 42 69
@20e4000..R[.~Bi
  backtrace:
    [<ca384d6f>] kasprintf+0x2c/0x54
    [<6ad3bbc2>] regmap_debugfs_init+0xdc/0x2fc
    [<bc4181da>] __regmap_init+0xc38/0xd88
    [<1f7e0609>] of_syscon_register+0x168/0x294
    [<735e8766>] device_node_get_regmap+0x6c/0x98
    [<d96c8982>] imx6ul_init_machine+0x20/0x88
    [<0456565b>] customize_machine+0x1c/0x30
    [<d07393d8>] do_one_initcall+0x80/0x3ac
    [<7e584867>] kernel_init_freeable+0x170/0x1f0
    [<80074741>] kernel_init+0x8/0x120
    [<285d6f28>] ret_from_fork+0x14/0x20
    [<00000000>] 0x0

Fixes: 9b947a13e7 ("regmap: use debugfs even when no device")
Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
Link: https://lore.kernel.org/r/20201229105046.41984-1-xiaolei.wang@windriver.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-01-17 14:05:37 +01:00
Jason Liu 2f68e5475b Merge tag 'v5.4.70' into imx_5.4.y
* tag 'v5.4.70': (3051 commits)
  Linux 5.4.70
  netfilter: ctnetlink: add a range check for l3/l4 protonum
  ep_create_wakeup_source(): dentry name can change under you...
  ...

 Conflicts:
	arch/arm/mach-imx/pm-imx6.c
	arch/arm64/boot/dts/freescale/imx8mm-evk.dts
	arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
	drivers/crypto/caam/caamalg.c
	drivers/gpu/drm/imx/dw_hdmi-imx.c
	drivers/gpu/drm/imx/imx-ldb.c
	drivers/gpu/drm/imx/ipuv3/ipuv3-crtc.c
	drivers/mmc/host/sdhci-esdhc-imx.c
	drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
	drivers/net/ethernet/freescale/enetc/enetc.c
	drivers/net/ethernet/freescale/enetc/enetc_pf.c
	drivers/thermal/imx_thermal.c
	drivers/usb/cdns3/ep0.c
	drivers/xen/swiotlb-xen.c
	sound/soc/fsl/fsl_esai.c
	sound/soc/fsl/fsl_sai.c

Signed-off-by: Jason Liu <jason.hui.liu@nxp.com>
2020-10-08 17:46:51 +08:00
Dmitry Baryshkov 283a323455 regmap: fix page selection for noinc writes
[ Upstream commit 05669b63170771d554854c0e465b76dc98fc7c84 ]

Non-incrementing writes can fail if register + length crosses page
border. However for non-incrementing writes we should not check for page
border crossing. Fix this by passing additional flag to _regmap_raw_write
and passing length to _regmap_select_page basing on the flag.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: cdf6b11daa ("regmap: Add regmap_noinc_write API")
Link: https://lore.kernel.org/r/20200917153405.3139200-2-dmitry.baryshkov@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:18:20 +02:00
Dmitry Baryshkov 47fef0ebc1 regmap: fix page selection for noinc reads
[ Upstream commit 4003324856311faebb46cbd56a1616bd3f3b67c2 ]

Non-incrementing reads can fail if register + length crosses page
border. However for non-incrementing reads we should not check for page
border crossing. Fix this by passing additional flag to _regmap_raw_read
and passing length to _regmap_select_page basing on the flag.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: 74fe7b551f ("regmap: Add regmap_noinc_read API")
Link: https://lore.kernel.org/r/20200917153405.3139200-1-dmitry.baryshkov@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:18:20 +02:00
Peng Fan 59242fa1d2 regmap: debugfs: check count when read regmap file
commit 74edd08a4fbf51d65fd8f4c7d8289cd0f392bd91 upstream.

When executing the following command, we met kernel dump.
dmesg -c > /dev/null; cd /sys;
for i in `ls /sys/kernel/debug/regmap/* -d`; do
	echo "Checking regmap in $i";
	cat $i/registers;
done && grep -ri "0x02d0" *;

It is because the count value is too big, and kmalloc fails. So add an
upper bound check to allow max size `PAGE_SIZE << (MAX_ORDER - 1)`.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1584064687-12964-1-git-send-email-peng.fan@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-31 18:39:32 +02:00
Marc Kleine-Budde 01d7bd8903 regmap: dev_get_regmap_match(): fix string comparison
[ Upstream commit e84861fec32dee8a2e62bbaa52cded6b05a2a456 ]

This function is used by dev_get_regmap() to retrieve a regmap for the
specified device. If the device has more than one regmap, the name parameter
can be used to specify one.

The code here uses a pointer comparison to check for equal strings. This
however will probably always fail, as the regmap->name is allocated via
kstrdup_const() from the regmap's config->name.

Fix this by using strcmp() instead.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20200703103315.267996-1-mkl@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-07-29 10:18:37 +02:00
Douglas Anderson 319c3c7980 regmap: debugfs: Don't sleep while atomic for fast_io regmaps
[ Upstream commit 299632e54b2e692d2830af84be51172480dc1e26 ]

If a regmap has "fast_io" set then its lock function uses a spinlock.
That doesn't work so well with the functions:
* regmap_cache_only_write_file()
* regmap_cache_bypass_write_file()

Both of the above functions have the pattern:
1. Lock the regmap.
2. Call:
   debugfs_write_file_bool()
     copy_from_user()
       __might_fault()
         __might_sleep()

Let's reorder things a bit so that we do all of our sleepable
functions before we grab the lock.

Fixes: d3dc5430d6 ("regmap: debugfs: Allow writes to cache state settings")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20200715164611.1.I35b3533e8a80efde0cec1cc70f71e1e74b2fa0da@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-07-22 09:33:04 +02:00
Jens Thoms Toerring 14e8708fff regmap: fix alignment issue
[ Upstream commit 53d860952c8215cf9ae1ea33409c8cb71ad6ad3d ]

The assembly and disassembly of data to be sent to or received from
a device invoke functions regmap_format_XX() and regmap_parse_XX()
that extract or insert data items from or into a buffer, using
assignments. In some cases the functions are called with a buffer
pointer with an odd address. On architectures with strict alignment
requirements this can result in a kernel crash. The assignments
have been replaced by functions that take alignment into account.

Signed-off-by: Jens Thoms Toerring <jt@toerring.de>
Link: https://lore.kernel.org/r/20200531095300.GA27570@toerring.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-07-16 08:16:32 +02:00
Charles Keepax b93df0f6d7 regmap: Fix memory leak from regmap_register_patch
[ Upstream commit 95b2c3ec4cb1689db2389c251d39f64490ba641c ]

When a register patch is registered the reg_sequence is copied but the
memory allocated is never freed. Add a kfree in regmap_exit to clean it
up.

Fixes: 22f0d90a34 ("regmap: Support register patch sets")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200617152129.19655-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-30 15:36:56 -04:00
Peng Fan f6298e826b regmap: debugfs: check count when read regmap file
When executing the following command, we met kernel dump.
dmesg -c > /dev/null; cd /sys;
for i in `ls /sys/kernel/debug/regmap/* -d`; do
	echo "Checking regmap in $i";
	cat $i/registers;
done && grep -ri "0x02d0" *;

It is because the count value is too big, and kmalloc fails. So add an
upper bound check to allow max size `PAGE_SIZE << (MAX_ORDER - 1)`.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1584064687-12964-1-git-send-email-peng.fan@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Joakim cherry pick from upstream commit: 74edd08a4fbf51d65fd8f4c7d8289cd0f392bd91
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
2020-04-14 17:12:03 +08:00
Jason Liu 335d2828a9 This is the 5.4.24 stable release
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Merge tag 'v5.4.24' into imx_5.4.y

Merge Linux stable release v5.4.24 into imx_5.4.y

* tag 'v5.4.24': (3306 commits)
  Linux 5.4.24
  blktrace: Protect q->blk_trace with RCU
  kvm: nVMX: VMWRITE checks unsupported field before read-only field
  ...

Signed-off-by: Jason Liu <jason.hui.liu@nxp.com>

 Conflicts:
	arch/arm/boot/dts/imx6sll-evk.dts
	arch/arm/boot/dts/imx7ulp.dtsi
	arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
	drivers/clk/imx/clk-composite-8m.c
	drivers/gpio/gpio-mxc.c
	drivers/irqchip/Kconfig
	drivers/mmc/host/sdhci-of-esdhc.c
	drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
	drivers/net/can/flexcan.c
	drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
	drivers/net/ethernet/mscc/ocelot.c
	drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
	drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
	drivers/net/phy/realtek.c
	drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
	drivers/perf/fsl_imx8_ddr_perf.c
	drivers/tee/optee/shm_pool.c
	drivers/usb/cdns3/gadget.c
	kernel/sched/cpufreq.c
	net/core/xdp.c
	sound/soc/fsl/fsl_esai.c
	sound/soc/fsl/fsl_sai.c
	sound/soc/sof/core.c
	sound/soc/sof/imx/Kconfig
	sound/soc/sof/loader.c
2020-03-08 18:57:18 +08:00
Ben Whitten 3b9586e82c regmap: fix writes to non incrementing registers
commit 2e31aab08bad0d4ee3d3d890a7b74cb6293e0a41 upstream.

When checking if a register block is writable we must ensure that the
block does not start with or contain a non incrementing register.

Fixes: 8b9f9d4dc5 ("regmap: verify if register is writeable before writing operations")
Signed-off-by: Ben Whitten <ben.whitten@gmail.com>
Link: https://lore.kernel.org/r/20200118205625.14532-1-ben.whitten@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-14 16:34:19 -05:00
Robby Cai 5af6d5eaf4 MLK-21865 Revert "regmap: use debugfs even when no device"
This reverts commit 9b947a13e7.

The commit 9b947a13e7 does not consider power and
clock when expose the regmap into debugsfs. This may bring some problem for some
case. E.g., For reset registers (not real GPR, but csi bridge register) for
MIPI DSI, MIPI CSI and LCDIF on i.mx8mm, they only can be accessed after the
disp_root clock and dispmix power has been turned on, otherwise the system may
be stuck.

on i.mx8mm evk, the command to reproduce (with default dtb, no display/capture
running):
cat /sys/kernel/debug/regmap/dummy-display-gpr@32e28000/registers

This patch reverted previous commit to avoid the exposure.

Signed-off-by: Robby Cai <robby.cai@nxp.com>
Reviewed-by: Fancy Fang <chen.fang@nxp.com>
2019-12-17 17:24:34 +08:00
Linus Torvalds 0372fd1a70 regmap: Updates for v5.4
Only two changes for this release, one fix for error handling with
 runtime PM and a change from Greg removing error handling from debugfs
 API calls now that they implement user visible error reporting.
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Merge tag 'regmap-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Pull regmap updates from Mark Brown:
 "Only two changes for this release, one fix for error handling with
  runtime PM and a change from Greg removing error handling from debugfs
  API calls now that they implement user visible error reporting"

* tag 'regmap-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap-irq: Correct error paths in regmap_irq_thread for pm_runtime
  regmap: no need to check return value of debugfs_create functions
2019-09-16 13:57:02 -07:00
Mark Brown 1bd4584626
Merge branch 'regmap-5.4' into regmap-next 2019-08-12 14:10:42 +01:00
Charles Keepax fba5b1e9ab
regmap-irq: Correct error paths in regmap_irq_thread for pm_runtime
Some error paths in regmap_irq_thread put the pm_runtime others do not,
there is no reason to leave the pm_runtime enabled in some cases so
update those paths to also put the pm_runtime.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20190812092409.21593-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-12 14:03:20 +01:00
Pierre-Louis Bossart 8676b3ca46 soundwire: fix regmap dependencies and align with other serial links
The existing code has a mixed select/depend usage which makes no sense.

config SOUNDWIRE_BUS
       tristate
       select REGMAP_SOUNDWIRE

config REGMAP_SOUNDWIRE
        tristate
        depends on SOUNDWIRE_BUS

Let's remove one layer of Kconfig definitions and align with the
solutions used by all other serial links.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190718230215.18675-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-08-09 10:20:40 +05:30
Greg Kroah-Hartman 9d52a35ebd
regmap: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

The debugfs core will warn if a file or directory can not be created, so
there's no need to duplicate the warning, nor really do anything else.

Cc: Mark Brown <broonie@kernel.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20190731132923.GA13829@kroah.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-01 14:06:56 +01:00
Mark Brown aaccf3863c
Merge branch 'regmap-5.3' into regmap-next 2019-07-04 17:33:59 +01:00
Mark Brown ea09b3e21f
Merge branch 'regmap-5.2' into regmap-linus 2019-07-04 17:33:56 +01:00
YueHaibing eff5a85001
regmap: select CONFIG_REGMAP while REGMAP_SCCB is set
REGMAP_SCCB is selected by ov772x and ov9650 drivers,
but CONFIG_REGMAP may not, so building will fails:

rivers/media/i2c/ov772x.c: In function ov772x_probe:
drivers/media/i2c/ov772x.c:1360:22: error: variable ov772x_regmap_config has initializer but incomplete type
  static const struct regmap_config ov772x_regmap_config = {
                      ^~~~~~~~~~~~~
drivers/media/i2c/ov772x.c:1361:4: error: const struct regmap_config has no member named reg_bits

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 5bbf32217b ("media: ov772x: use SCCB regmap")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190704093553.49904-1-yuehaibing@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-07-04 13:18:48 +01:00
Andy Shevchenko 55535589eb
regmap: lzo: Switch to bitmap_zalloc()
Switch to bitmap_zalloc() to show clearly what we are allocating.
Besides that it returns pointer of bitmap type instead of opaque void *.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-06-17 15:18:44 +01:00
Srinivas Kandagatla db057679de
regmap: fix bulk writes on paged registers
On buses like SlimBus and SoundWire which does not support
gather_writes yet in regmap, A bulk write on paged register
would be silently ignored after programming page.
This is because local variable 'ret' value in regmap_raw_write_impl()
gets reset to 0 once page register is written successfully and the
code below checks for 'ret' value to be -ENOTSUPP before linearising
the write buffer to send to bus->write().

Fix this by resetting the 'ret' value to -ENOTSUPP in cases where
gather_writes() is not supported or single register write is
not possible.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-06-12 13:56:06 +01:00
Vitor Soares 6445500b43
regmap: add i3c bus support
Add basic support for i3c bus.
This is a simple implementation that only give support
for SDR Read and Write commands.

Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-06-07 13:09:55 +01:00
Daniel Baluta 2899872b62
regmap: debugfs: Fix memory leak in regmap_debugfs_init
As detected by kmemleak running on i.MX6ULL board:

nreferenced object 0xd8366600 (size 64):
  comm "swapper/0", pid 1, jiffies 4294937370 (age 933.220s)
  hex dump (first 32 bytes):
    64 75 6d 6d 79 2d 69 6f 6d 75 78 63 2d 67 70 72  dummy-iomuxc-gpr
    40 32 30 65 34 30 30 30 00 e3 f3 ab fe d1 1b dd  @20e4000........
  backtrace:
    [<b0402aec>] kasprintf+0x2c/0x54
    [<a6fbad2c>] regmap_debugfs_init+0x7c/0x31c
    [<9c8d91fa>] __regmap_init+0xb5c/0xcf4
    [<5b1c3d2a>] of_syscon_register+0x164/0x2c4
    [<596a5d80>] syscon_node_to_regmap+0x64/0x90
    [<49bd597b>] imx6ul_init_machine+0x34/0xa0
    [<250a4dac>] customize_machine+0x1c/0x30
    [<2d19fdaf>] do_one_initcall+0x7c/0x398
    [<e6084469>] kernel_init_freeable+0x328/0x448
    [<168c9101>] kernel_init+0x8/0x114
    [<913268aa>] ret_from_fork+0x14/0x20
    [<ce7b131a>] 0x0

Root cause is that map->debugfs_name is allocated using kasprintf
and then the pointer is lost by assigning it other memory address.

Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-05-20 15:23:29 +01:00
Mark Brown 615c4d9a50
Merge branch 'regmap-5.2' into regmap-next 2019-04-25 20:27:04 +01:00
Mark Brown 7fdc9fc874
Merge branch 'regmap-5.1' into regmap-linus 2019-04-25 20:27:00 +01:00
Greg Kroah-Hartman 37613fa5b7
regmap: add proper SPDX identifiers on files that did not have them.
There were a few files in the regmap code that did not have SPDX
identifiers on them, so fix that up.  At the same time, remove the "free
form" text that specified the license of the file, as that is impossible
for any tool to properly parse.

Also, as Mark loves // comment markers, convert all of the headers to be
the same to make things look consistent :)

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-04-25 20:22:15 +01:00
Han Nandor 8b9f9d4dc5
regmap: verify if register is writeable before writing operations
regmap provides a couple of ways to validate the register range used.
a) maxim allowed register, b) writable/readable register tables,
c) callback function that can be provided by the driver to validate
a register. regmap framework should verify if registers
are writeable before every write operation. However this doesn't
seems to happen in every situation.

The method `_regmap_raw_write_impl` is only using the `writeable_reg`
callback to verify if register is writeable, ignoring the other two.
This can lead to undefined behaviour since this allows to write to
registers that could be declared un-writeable by using any other
option.

Change `_regmap_raw_write_impl` to use the `regmap_writeable` method
to verify if registers are writable before the write operation.

Signed-off-by: Nandor Han <nandor.han@vaisala.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-04-03 11:08:11 +07:00
Srinivas Kandagatla 8293488205
regmap: regmap-irq: fix getting type default values
Checking for value of type default value just after allocating will
always be zero and the type register default values will never be read,
so fix this!

Without this patch setting irq type will be silently ignored.
Patch "regmap: regmap-irq: Remove default irq type setting from core"
did remove the default mask but it forgot to remove the check before
reading the default type register.

Fixes: 84267d1b18 ("regmap: regmap-irq: Remove default irq type setting from core")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-04-01 15:11:41 +07:00
Lucas Tanure cc6a8d69ba
regmap: debugfs: Jump to the next readable register
Improve the speed of the loop jumping to the next
available register

Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Tested-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-20 17:13:31 +00:00
Lucas Tanure a1c67d65df
regmap: debugfs: Replace code by already existing function
Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-03-19 13:08:41 +00:00
Mark Brown 66fb181d6f
Merge remote-tracking branch 'regmap/topic/irq' into regmap-next 2019-01-29 17:17:03 +00:00
Mark Brown 31172d1002
Merge branch 'regmap-5.1' into regmap-next 2019-01-29 17:17:02 +00:00
Mathieu Malaterre 435bba0f11
regmap: Remove attribute packed from struct 'regcache_rbtree_node'
On one hand commit 28644c809f ("regmap: Add the rbtree cache support")
added 'regcache_rbtree_node' as packed structure, while on the other hand
commit e977145aea ("[RBTREE] Add explicit alignment to sizeof(long)
for struct rb_node.") declared struct 'rb_node' as aligned.

Solve the ambiguity of placing aligned structure in a packed one by
removing the packed attribute from struct. This seems to be the behavior
of gcc anyway.

This removes the following warning (W=1):

  drivers/base/regmap/regcache-rbtree.c:36:1: warning: alignment 1 of 'struct regcache_rbtree_node' is less than 4 [-Wpacked-not-aligned]

Cc: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-29 15:23:56 +00:00
Matti Vaittinen a2d21848d9
regmap: regmap-irq: Add main status register support
There is bunch of devices with multiple logical blocks which
can generate interrupts. It's not a rare case that the interrupt
reason registers are arranged so that there is own status/ack/mask
register for each logical block. In some devices there is also a
'main interrupt register(s)' which can indicate what sub blocks
have interrupts pending.

When such a device is connected via slow bus like i2c the main
part of interrupt handling latency can be caused by bus accesses.
On systems where it is expected that only one (or few) sub blocks
have active interrupts we can reduce the latency by only reading
the main register and those sub registers which have active
interrupts. Support this with regmap-irq for simple cases where
main register does not require acking or masking.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-23 15:52:15 +00:00
Mark Zhang 7151449fe7
regmap-irq: do not write mask register if mask_base is zero
If client have not provided the mask base register then do not
write into the mask register.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Jinyoung Park <jinyoungp@nvidia.com>
Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Signed-off-by: Mark Zhang <markz@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-14 22:11:22 +00:00
Matti Vaittinen 74d4b4e0f4
regmap: regmap-irq: silently ignore unsupported type settings
Do not return error if irq-type setting is requested for
controlloer which does not support this. This is how
regmap-irq has previously handled the undupported type
settings and existing drivers seem to be upset if failure
is now reported.

Fixes: 1c2928e3e3 ("regmap: regmap-irq/gpio-max77620: add level-irq support")
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-12-31 19:35:26 +00:00
Mark Brown 58331d618b
Merge remote-tracking branch 'regmap/topic/irq' into regmap-next 2018-12-19 18:38:33 +00:00
Bartosz Golaszewski c82ea33ead
regmap: irq: add an option to clear status registers on unmask
Some interrupt controllers whose interrupts are acked on read will set
the status bits for masked interrupts without changing the state of
the IRQ line.

Some chips have an additional "feature" where if those set bits are
not cleared before unmasking their respective interrupts, the IRQ
line will change the state and we'll interpret this as an interrupt
although it actually fired when it was masked.

Add a new field to the irq chip struct that tells the regmap irq chip
code to always clear the status registers before actually changing the
irq mask values.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-12-19 18:38:13 +00:00
Matti Vaittinen 1c2928e3e3
regmap: regmap-irq/gpio-max77620: add level-irq support
Add level active IRQ support to regmap-irq irqchip. Change breaks
existing regmap-irq type setting. Convert the existing drivers which
use regmap-irq with trigger type setting (gpio-max77620) to work
with this new approach. So we do not magically support level-active
IRQs on gpio-max77620 - but add support to the regmap-irq for chips
which support them =)

We do not support distinguishing situation where HW supports rising
and falling edge detection but not both. Separating this would require
inventing yet another flags for IRQ types.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-12-19 18:35:45 +00:00
Matti Vaittinen 84267d1b18
regmap: regmap-irq: Remove default irq type setting from core
The common code should not set IRQ type. Read HW defaults to the
cache at startup instead of forcing type to EDGE_BOTH. If
default setting is needed this should be done via normal
mechanisms or by chip specific code if normal mechanisms are not
suitable for some reason. Common regmap-irq code should not have
defaults hard-coded but keep the HW/boot defaults untouched.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-12-19 17:52:54 +00:00