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2020-01-30i2c: cadence: Fix power management order of operationsTopi Kuutela1-3/+6
E.g. pm_runtime_set_active must be called while the power management system is disabled. Fixes extra hanging clk_enable. Signed-off-by: Topi Kuutela <topi.kuutela@gmail.com> Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-30i2c: cadence: Fix error printing in case of deferShubhrajyoti Datta1-1/+2
Do not print error in case of EPROBE_DEFER. Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-30i2c: cadence: Handle transfer_size rolloverAlex Williams1-5/+13
Under certain conditions, Cadence's I2C controller's transfer_size register will roll over and generate invalid read transactions. Before this change, the ISR relied solely on the RXDV bit to determine when to write more data to the user's buffer. The invalid read data would cause overruns, smashing stacks and worse. This change stops the buffer writes to the requested boundary and reports the error. The controller will be reset so normal transactions may resume. Signed-off-by: Alex Williams <alex.williams@ni.com> Reviewed-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Reviewed-by: Michal Simek <michal.simek@xilinx.com> # in a seperate mail Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-30i2c: i801: Add support for Intel Comet Lake PCH-VJarkko Nikula1-0/+4
Add support for Intel Comet Lake PCH-V which is based on Intel Kaby Lake. Difference between it and other Comet Lake variants is that former uses previous iTCO version 4 and latter use version 6 like Intel Cannon Lake PCH. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-29Merge branch 'i2c-mux/for-next' of https://github.com/peda-r/i2c-mux into ↵Wolfram Sang2-37/+61
i2c/for-5.6 The main feature is the idle-state rework of the pca954x driver from Biwen Li.
2020-01-29i2c: xiic: fix indentation issueColin Ian King1-1/+1
There is a statement that is indented one level too deeply, remove the extraneous tab. Fixes: b4c119dbc300 ("i2c: xiic: Add timeout to the rx fifo wait loop") Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Shubhrajyoti Datta <shubhrajyoti.datta@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-29i2c: parport: fix spelling mistake: "Atmost" -> "At most"Colin Ian King1-1/+1
There is a spelling mistake in a module parameter description. Fix it. Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-28Merge tag 'ioremap-5.6' of git://git.infradead.org/users/hch/ioremapLinus Torvalds2-2/+2
Pull ioremap updates from Christoph Hellwig: "Remove the ioremap_nocache API (plus wrappers) that are always identical to ioremap" * tag 'ioremap-5.6' of git://git.infradead.org/users/hch/ioremap: remove ioremap_nocache and devm_ioremap_nocache MIPS: define ioremap_nocache to ioremap
2020-01-23i2c: exynos: Update Kconfig documentationKrzysztof Kozlowski1-4/+4
Update the help text to reflect current support devices: 1. The Exynos high speed I2C driver supports Exynos5 (ARMv7), Exynos5433 and Exynos7 (both ARMv8) SoCs, 2. The S3C I2C driver supports S3C, S5Pv210 and Exynos{3,4,5} SoCs. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-23i2c: Enable compile testing for more driversKrzysztof Kozlowski1-28/+33
Some of the I2C bus drivers can be compile tested to increase build coverage. This requires also: 1. Adding dependencies on COMMON_CLK for BCM2835 and Meson I2C controllers, 2. Adding 'if' conditional to 'default y' so they will not get enabled by default on all other architectures, 3. Limiting few compile test options to supported architectures (which provide the readsX()/writesX() primitives). Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> [wsa: revert chunk for ZX2967. it needs more preparation] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: xiic: Fix the clocking across bind unbindShubhrajyoti Datta1-5/+7
The recommendation is that the set_active should be done with pm runtime disabled. Also fix the remove path for clocking. Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: xiic: defer the probe if clock is not foundVenkatesh Yadav Abbarapu1-1/+2
It's not always the case that clock is already available when i2c driver get probed at the first time, e.g. the clock is provided by clock wizard which may be probed after i2c driver. So let's defer the probe when devm_clk_get() call fails and give it chance to try later. Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: xiic: Add timeout to the rx fifo wait loopShubhrajyoti Datta1-10/+42
Add timeout to the rx fifo empty wait loop. Also check for the return value for xiic_reinit and pass it to xiic_start_xfer. Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: highlander: Use proper printk format for size_tKrzysztof Kozlowski1-1/+1
size_t should be printed with its own format to be 64-bit friendly and fix warning when compiling on 64-bit platform (e.g. with COMPILE_TEST): drivers/i2c/busses/i2c-highlander.c: In function ‘highlander_i2c_smbus_xfer’: drivers/i2c/busses/i2c-highlander.c:325:22: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘size_t {aka long unsigned int}’ [-Wformat=] Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: pnx: Use proper printk format for resource_size_tKrzysztof Kozlowski1-2/+2
resource_size_t should be printed with its own size-independent format to fix warnings when compiling on 64-bit platform (e.g. with COMPILE_TEST): drivers/i2c/busses/i2c-pnx.c: In function ‘i2c_pnx_probe’: drivers/i2c/busses/i2c-pnx.c:737:47: warning: format ‘%x’ expects argument of type ‘unsigned int’, but argument 5 has type ‘resource_size_t {aka long long unsigned int}’ [-Wformat=] Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: pmcmsp: Use proper printk format for resource_size_tKrzysztof Kozlowski1-3/+3
resource_size_t should be printed with its own size-independent format to fix warnings when compiling on 64-bit platform (e.g. with COMPILE_TEST): drivers/i2c/busses/i2c-pmcmsp.c: In function ‘pmcmsptwi_probe’: drivers/i2c/busses/i2c-pmcmsp.c:276:25: warning: format ‘%x’ expects argument of type ‘unsigned int’, but argument 3 has type ‘resource_size_t {aka long long unsigned int}’ [-Wformat=] Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: i2c-core-of: convert to use i2c_new_client_device()Wolfram Sang1-4/+3
Move away from the deprecated API and return the shiny new ERRPTR where useful. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: i2c-core-base: convert to use i2c_new_client_device()Wolfram Sang1-7/+6
Move away from the deprecated API and return the shiny new ERRPTR where useful. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: i2c-core-acpi: convert to use i2c_new_client_device()Wolfram Sang1-8/+4
Move away from the deprecated API and return the shiny new ERRPTR where useful. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: xiic: convert to use i2c_new_client_device()Wolfram Sang1-1/+1
Move away from the deprecated API and return the shiny new ERRPTR where useful. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: taos-evm: convert to use i2c_new_client_device()Wolfram Sang1-2/+2
Move away from the deprecated API and return the shiny new ERRPTR where useful. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Tested-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: powermac: convert to use i2c_new_client_device()Wolfram Sang1-4/+4
Move away from the deprecated API and return the shiny new ERRPTR where useful. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: ocores: convert to use i2c_new_client_device()Wolfram Sang1-1/+1
Move away from the deprecated API and return the shiny new ERRPTR where useful. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: nvidia-gpu: convert to use i2c_new_client_device()Wolfram Sang1-3/+3
Move away from the deprecated API and return the shiny new ERRPTR where useful. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: i801: convert to use i2c_new_client_device()Wolfram Sang1-3/+3
Move away from the deprecated API and return the shiny new ERRPTR where useful. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: cht-wc: convert to use i2c_new_client_device()Wolfram Sang1-3/+3
Move away from the deprecated API and return the shiny new ERRPTR where useful. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: iop3xx: Fix memory leak in probe error pathKrzysztof Kozlowski1-4/+8
When handling devm_gpiod_get_optional() errors, free the memory already allocated. This fixes Smatch warnings: drivers/i2c/busses/i2c-iop3xx.c:437 iop3xx_i2c_probe() warn: possible memory leak of 'new_adapter' drivers/i2c/busses/i2c-iop3xx.c:442 iop3xx_i2c_probe() warn: possible memory leak of 'new_adapter' Fixes: fdb7e884ad61 ("i2c: iop: Use GPIO descriptors") Reported-by: kbuild test robot <lkp@intel.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: stu300: Use proper printk format for iomem pointerKrzysztof Kozlowski1-1/+1
iomem pointers should be printed with pointer format to hide the actual value and fix warnings when compiling on 64-bit platform (e.g. with COMPILE_TEST): drivers/i2c/busses/i2c-stu300.c: In function ‘stu300_wait_while_busy’: drivers/i2c/busses/i2c-stu300.c:446:76: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: tegra: Check DMA completion status in addition to left timeDmitry Osipenko1-1/+1
It is more robust to check completion status in addition to the left time in a case of DMA transfer because transfer's completion happens in two phases [one is ISR, other is tasklet] and thus it is possible that DMA is completed while I2C completion awaiting times out because of the deferred notification done by the DMA driver. The DMA completion status becomes 100% actual after DMA synchronization. This fixes spurious DMA timeouts when system is under load. Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: tegra: Always terminate DMA transferDmitry Osipenko1-8/+4
It is possible that I2C could error out in the middle of DMA transfer and in this case DMA channel needs to be reset, otherwise a follow up transfer will fail because DMA channel stays blocked. Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: tegra: Use relaxed versions of readl/writelDmitry Osipenko1-10/+11
There is nothing to synchronize in regards to memory accesses for PIO transfers and for DMA transfers the DMA API takes care of the syncing. Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: tegra: Rename I2C_PIO_MODE_MAX_LEN to I2C_PIO_MODE_PREFERRED_LENDmitry Osipenko1-5/+6
DMA is preferred for a larger transfers, while PIO is preferred for a smaller transfers to avoid unnecessary DMA overhead. There is no strict size limitations for the PIO-mode transfers, so let's rename the constant for clarity. Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: tegra: Support atomic transfersDmitry Osipenko1-15/+69
System shutdown may happen with interrupts being disabled and in this case kernel may hang if atomic transfer isn't supported by driver. There were several occurrences where I found my Nexus 7 completely discharged despite of being turned off and then one day I spotted this in the log: reboot: Power down ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at drivers/i2c/i2c-core.h:40 i2c_transfer+0x95/0x9c No atomic I2C transfer handler for 'i2c-1' Modules linked in: tegra30_devfreq CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 5.4.0-next-20191202-00120-gf7ecd80fb803-dirty #3195 Hardware name: NVIDIA Tegra SoC (Flattened Device Tree) [<c010e4b5>] (unwind_backtrace) from [<c010a0fd>] (show_stack+0x11/0x14) [<c010a0fd>] (show_stack) from [<c09995e5>] (dump_stack+0x85/0x94) [<c09995e5>] (dump_stack) from [<c011f3d1>] (__warn+0xc1/0xc4) [<c011f3d1>] (__warn) from [<c011f691>] (warn_slowpath_fmt+0x61/0x78) [<c011f691>] (warn_slowpath_fmt) from [<c069a8dd>] (i2c_transfer+0x95/0x9c) [<c069a8dd>] (i2c_transfer) from [<c05667f1>] (regmap_i2c_read+0x4d/0x6c) [<c05667f1>] (regmap_i2c_read) from [<c0563601>] (_regmap_raw_read+0x99/0x1cc) [<c0563601>] (_regmap_raw_read) from [<c0563757>] (_regmap_bus_read+0x23/0x38) [<c0563757>] (_regmap_bus_read) from [<c056293d>] (_regmap_read+0x3d/0xfc) [<c056293d>] (_regmap_read) from [<c0562d3b>] (_regmap_update_bits+0x87/0xc4) [<c0562d3b>] (_regmap_update_bits) from [<c0563add>] (regmap_update_bits_base+0x39/0x50) [<c0563add>] (regmap_update_bits_base) from [<c056fd39>] (max77620_pm_power_off+0x29/0x2c) [<c056fd39>] (max77620_pm_power_off) from [<c013bbdd>] (__do_sys_reboot+0xe9/0x170) [<c013bbdd>] (__do_sys_reboot) from [<c0101001>] (ret_fast_syscall+0x1/0x28) Exception stack(0xde907fa8 to 0xde907ff0) 7fa0: 00000000 00000000 fee1dead 28121969 4321fedc 00000000 7fc0: 00000000 00000000 00000000 00000058 00000000 00000000 00000000 00000000 7fe0: 0045adf0 bed9abb8 004444a0 b6c666d0 ---[ end trace bdd18f87595b1a5e ]--- The atomic transferring is implemented by enforcing PIO mode for the transfer and by polling interrupt status until transfer is completed or failed. Now system shuts down properly every time. Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: tegra: Prevent interrupt triggering after transfer timeoutDmitry Osipenko1-34/+36
Potentially it is possible that interrupt may fire after transfer timeout. That may not end up well for the next transfer because interrupt handling may race with hardware resetting. This is very unlikely to happen in practice, but anyway let's prevent the potential problem by enabling interrupt only at the moments when it is actually necessary to get some interrupt event. Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15Merge branch 'i2c/for-current' into i2c/for-5.6Wolfram Sang4-23/+47
2020-01-15i2c: parport: move include file into main sourceWolfram Sang2-114/+105
After removal of the parport-light driver, this include is used by the parport driver exclusively and can be included in the main source. Move module parameter declarations to its variable declaration while here. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: parport: simplify Kconfig descriptionWolfram Sang1-8/+2
The driver is not 'new' anymore, so remove details from the driver it surpassed. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: parport-light: remove driverWolfram Sang3-296/+0
The justification of a light version of the parport driver was less overhead for embedded systems. Well, today, even if an embedded system still has a parport, it surely can handle the fully-fledged parport driver. Remove it to reduce the maintenance burden. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: tegra: Properly disable runtime PM on driver's probe errorDmitry Osipenko1-10/+19
One of the recent Tegra I2C commits made a change that resumes runtime PM during driver's probe, but it missed to put the RPM in a case of error. Note that it's not correct to use pm_runtime_status_suspended because it breaks RPM refcounting. Fixes: 8ebf15e9c869 ("i2c: tegra: Move suspend handling to NOIRQ phase") Cc: <stable@vger.kernel.org> # v5.4+ Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: tegra: Fix suspending in active runtime PM stateDmitry Osipenko1-0/+9
I noticed that sometime I2C clock is kept enabled during suspend-resume. This happens because runtime PM defers dynamic suspension and thus it may happen that runtime PM is in active state when system enters into suspend. In particular I2C controller that is used for CPU's DVFS is often kept ON during suspend because CPU's voltage scaling happens quite often. Fixes: 8ebf15e9c869 ("i2c: tegra: Move suspend handling to NOIRQ phase") Cc: <stable@vger.kernel.org> # v5.4+ Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-14i2c: meson: implement the master_xfer_atomic callbackMartin Blumenstingl1-32/+65
Boards with some of the 32-bit SoCs (mostly Meson8 and Meson8m2) use a Ricoh RN5T618 PMU which acts as system power controller. The driver for the system power controller may need to the I2C bus just before shutting down or rebooting the system. At this stage the interrupts may be disabled already. Implement the master_xfer_atomic callback so the driver for the RN5T618 PMU can communicate properly with the PMU when shutting down or rebooting the board. The CTRL register has a status bit which can be polled to determine when processing has completed. According to the public S805 datasheet the value 0 means "idle" and 1 means "running". Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> [wsa: converted some whitespace alignment] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-10i2c: fix bus recovery stop mode timingRussell King1-3/+10
The I2C specification states that tsu:sto for standard mode timing must be at minimum 4us. Pictographically, this is: SCL: ____/~~~~~~~~~ SDA: _________/~~~~ ->| |<- 4us minimum We are currently waiting 2.5us between asserting SCL and SDA, which is in violation of the standard. Adjust the timings to ensure that we meet what is stipulated as the minimum timings to ensure that all devices correctly interpret the STOP bus transition. This is more important than trying to generate a square wave with even duty cycle. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-06i2c: bcm2835: Store pointer to bus clockStefan Wahren1-9/+8
The commit bebff81fb8b9 ("i2c: bcm2835: Model Divider in CCF") introduced a NULL pointer dereference on driver unload. It seems that we can't fetch the bus clock via devm_clk_get in bcm2835_i2c_remove. As an alternative approach store a pointer to the bus clock in the private driver structure. Fixes: bebff81fb8b9 ("i2c: bcm2835: Model Divider in CCF") Signed-off-by: Stefan Wahren <wahrenst@gmx.net> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-06I2C: JZ4780: Add support for the X1000.周琰杰 (Zhou Yanjie)1-40/+116
Add support for probing i2c driver on the X1000 Soc from Ingenic. call the corresponding fifo parameter according to the device model obtained from the devicetree. Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> Acked-by: Paul Cercueil <paul@crapouillou.net> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-06i2c: tiny-usb: Correct I2C fault codes.Christoph Müllner1-4/+4
This patch changes the I2C fault codes according to the specified values in Documentation/i2c/fault-codes. Signed-off-by: Christoph Müllner <christoph.muellner@theobroma-systems.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-06i2c: at91: remote default value initializationEugen Hristev1-39/+0
Platform data structs are initialized by default with zero values. Thus it becomes redundant to initialize them manually to zero (false). Remove extra false initialization for field members in structs. Reported-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Reviewed-by: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-06i2c: at91: fix clk_offset for sam9x60Eugen Hristev1-1/+1
In SAM9X60 datasheet, FLEX_TWI_CWGR register description mentions clock offset of 3 cycles (compared to 4 in eg. SAMA5D3). This is the same offset as in SAMA5D2. Fixes: b00277923743 ("i2c: at91: add new platform support for sam9x60") Suggested-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-06remove ioremap_nocache and devm_ioremap_nocacheChristoph Hellwig2-2/+2
ioremap has provided non-cached semantics by default since the Linux 2.6 days, so remove the additional ioremap_nocache interface. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Arnd Bergmann <arnd@arndb.de>
2020-01-03i2c: mux: pca954x: support property idle-stateBiwen Li1-23/+46
This supports property idle-state,if present, overrides i2c-mux-idle-disconnect. My use cases: - Use the property idle-state to fix an errata on LS2085ARDB and LS2088ARDB. - Errata id: E-00013(board LS2085ARDB and LS2088ARDB revision on Rev.B, Rev.C and Rev.D). - About E-00013: - Description: I2C1 and I2C3 buses are missing pull-up. - Impact: When the PCA954x device is tri-stated, the I2C bus will float. This makes the I2C bus and its associated downstream devices inaccessible. - Hardware fix: Populate resistors R189 and R190 for I2C1 and resistors R228 and R229 for I2C3. - Software fix: Remove the tri-state option from the PCA954x driver(PCA954x always on enable status, specify a channel zero in dts to fix the errata E-00013). Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com> Signed-off-by: Biwen Li <biwen.li@nxp.com> Signed-off-by: Peter Rosin <peda@axentia.se>
2020-01-03i2c: mux: pca9541: use the BIT macroPeter Rosin1-14/+15
Because it looks nice! Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Peter Rosin <peda@axentia.se>
generated by cgit v1.2.3 (git 2.39.0) at 2025-09-25 13:37:48 +0300