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path: root/drivers/i2c/busses
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2020-12-09i2c: owl: Add compatible for the Actions Semi S500 I2C controllerCristian Ciocaltea
Add S500 variant to the list of devices supported by the Actions Semi Owl I2C driver. Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-07i2c: imx: support slave mode for imx I2C driverBiwen Li
The patch supports slave mode for imx I2C driver Signed-off-by: Biwen Li <biwen.li@nxp.com> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-07Merge branch 'i2c/for-current' into i2c/for-5.11Wolfram Sang
2020-12-05i2c: mlxbf: Fix the return check of devm_ioremap and ioremapWang Xiaojun
devm_ioremap and ioremap may return NULL which cannot be checked by IS_ERR. Signed-off-by: Wang Xiaojun <wangxiaojun11@huawei.com> Reported-by: Hulk Robot <hulkci@huawei.com> Acked-by: Khalil Blaiech <kblaiech@nvidia.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-05i2c: mlxbf: select CONFIG_I2C_SLAVEArnd Bergmann
If this is not enabled, the interfaces used in this driver do not work: drivers/i2c/busses/i2c-mlxbf.c:1888:3: error: implicit declaration of function 'i2c_slave_event' [-Werror,-Wimplicit-function-declaration] i2c_slave_event(slave, I2C_SLAVE_WRITE_REQUESTED, &value); ^ drivers/i2c/busses/i2c-mlxbf.c:1888:26: error: use of undeclared identifier 'I2C_SLAVE_WRITE_REQUESTED' i2c_slave_event(slave, I2C_SLAVE_WRITE_REQUESTED, &value); ^ drivers/i2c/busses/i2c-mlxbf.c:1890:32: error: use of undeclared identifier 'I2C_SLAVE_WRITE_RECEIVED' ret = i2c_slave_event(slave, I2C_SLAVE_WRITE_RECEIVED, ^ drivers/i2c/busses/i2c-mlxbf.c:1892:26: error: use of undeclared identifier 'I2C_SLAVE_STOP' i2c_slave_event(slave, I2C_SLAVE_STOP, &value); ^ Fixes: b5b5b32081cd ("i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Khalil Blaiech <kblaiech@nvidia.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-03i2c: ismt: Adding support for I2C_SMBUS_BLOCK_PROC_CALLMario Alejandro Posso Escobar
Expand the driver to support I2C_SMBUS_BLOCK_PROC_CALL since HW supports it already. Co-developed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mario Alejandro Posso Escobar <mario.posso.escobar@intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-03i2c: ocores: Avoid false-positive error log message.Stefan Lässer
Since commit 7723f4c5ecdb ("driver core: platform: Add an error message to platform_get_irq*()"), platform_get_irq() will call dev_err() on an error. In case of i2c ocores this leads to a false-positive error being logged: [ 4.173989] 007: ocores-i2c ocores-i2c: IRQ index 0 not found i2c ocores already handles the case when the IRQ cannot be found and therefore there is no benefit in having this error message being logged. This commit switches to platform_get_irq_optional(), which does not log in case the IRQ cannot be found. Signed-off-by: Stefan Lässer <stefan.laesser@omicronenergy.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-03Revert "i2c: qcom-geni: Disable DMA processing on the Lenovo Yoga C630"Bjorn Andersson
A combination of recent bug fixes by Doug Anderson and the proper definition of iommu streams means that this hack is no longer needed. Let's clean up the code by reverting '127068abe85b ("i2c: qcom-geni: Disable DMA processing on the Lenovo Yoga C630")'. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Caleb Connolly <caleb@connolly.tech> Tested-by: Steev Klimaszewski <steev@kali.org> Reviewed-by: Akash Asthana <akashast@codeaurora.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-02i2c: mxs: Remove unneeded platform_device_idFabio Estevam
The i2c-mxs driver only runs on DT-platform and there is no need to use the platform_device_id structure to pass the driver data. Get rid of it to make the code simpler. Signed-off-by: Fabio Estevam <festevam@gmail.com> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-02i2c: pca-platform: drop two members from driver data that are assigned to onlyUwe Kleine-König
io_base and io_size are assigned to only in .probe() and otherwise unused. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-02i2c: imx: Remove unused .id_table supportFabio Estevam
Since 5.10-rc1 i.MX is a devicetree-only platform and the existing .id_table support in this driver was only useful for old non-devicetree platforms. Signed-off-by: Fabio Estevam <festevam@gmail.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-02i2c: nvidia-gpu: drop empty stub for runtime pmVaibhav Gupta
After the commit c5eb1190074c ("PCI / PM: Allow runtime PM without callback functions") we no more need empty stubs for runtime-pm to work. The driver has no device specific task(s) for .suspend() . The stub was placed just for runtime-pm, which can be dropped now. Reported-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com> Reviewed-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-02i2c: mv64xxx: Add bus error recoveryMark Tomlinson
This adds i2c bus recovery to the mv64xxx driver. Implement bus recovery to recover from SCL/SDA stuck low. This uses the generic recovery function, setting the clock/data lines as GPIO pins, and sending 9 clocks to try and recover the bus. Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz> [wsa: added some curly braces] Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-02i2c: imx: Don't generate STOP condition if arbitration has been lostChristian Eggers
If arbitration is lost, the master automatically changes to slave mode. I2SR_IBB may or may not be reset by hardware. Raising a STOP condition by resetting I2CR_MSTA has no effect and will not clear I2SR_IBB. So calling i2c_imx_bus_busy() is not required and would busy-wait until timeout. Signed-off-by: Christian Eggers <ceggers@arri.de> Tested (not extensively) on Vybrid VF500 (Toradex VF50): Tested-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de> Cc: stable@vger.kernel.org # Requires trivial backporting, simple remove # the 3rd argument from the calls to # i2c_imx_bus_busy(). Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-02i2c: imx: Check for I2SR_IAL after every byteChristian Eggers
Arbitration Lost (IAL) can happen after every single byte transfer. If arbitration is lost, the I2C hardware will autonomously switch from master mode to slave. If a transfer is not aborted in this state, consecutive transfers will not be executed by the hardware and will timeout. Signed-off-by: Christian Eggers <ceggers@arri.de> Tested (not extensively) on Vybrid VF500 (Toradex VF50): Tested-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de> Cc: stable@vger.kernel.org Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-02i2c: imx: Fix reset of I2SR_IAL flagChristian Eggers
According to the "VFxxx Controller Reference Manual" (and the comment block starting at line 97), Vybrid requires writing a one for clearing an interrupt flag. Syncing the method for clearing I2SR_IIF in i2c_imx_isr(). Signed-off-by: Christian Eggers <ceggers@arri.de> Fixes: 4b775022f6fd ("i2c: imx: add struct to hold more configurable quirks") Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de> Cc: stable@vger.kernel.org Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-02i2c: qcom: Fix IRQ error misassignementRobert Foss
During cci_isr() errors read from register fields belonging to i2c master1 are currently assigned to the status field belonging to i2c master0. This patch corrects this error, and always assigns master1 errors to the status field of master1. Fixes: e517526195de ("i2c: Add Qualcomm CCI I2C driver") Reported-by: Loic Poulain <loic.poulain@linaro.org> Suggested-by: Loic Poulain <loic.poulain@linaro.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-12-02i2c: qup: Fix error return code in qup_i2c_bam_schedule_desc()Zhihao Cheng
Fix to return the error code from qup_i2c_change_state() instaed of 0 in qup_i2c_bam_schedule_desc(). Fixes: fbf9921f8b35d9b2 ("i2c: qup: Fix error handling") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-23PM: sleep: Add dev_wakeup_path() helperPatrice Chotard
Add dev_wakeup_path() helper to avoid to spread dev->power.wakeup_path test in drivers. Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-11-06i2c: designware: slave should do WRITE_REQUESTED before WRITE_RECEIVEDMichael Wu
Sometimes we would get the following flow when doing an i2cset: 0x1 STATUS SLAVE_ACTIVITY=0x1 : RAW_INTR_STAT=0x514 : INTR_STAT=0x4 I2C_SLAVE_WRITE_RECEIVED 0x1 STATUS SLAVE_ACTIVITY=0x0 : RAW_INTR_STAT=0x714 : INTR_STAT=0x204 I2C_SLAVE_WRITE_REQUESTED I2C_SLAVE_WRITE_RECEIVED Documentation/i2c/slave-interface.rst says that I2C_SLAVE_WRITE_REQUESTED, which is mandatory, should be sent while the data did not arrive yet. It means in a write-request I2C_SLAVE_WRITE_REQUESTED should be reported before any I2C_SLAVE_WRITE_RECEIVED. By the way, I2C_SLAVE_STOP didn't be reported in the above case because DW_IC_INTR_STAT was not 0x200. dev->status can be used to record the current state, especially Designware I2C controller has no interrupts to identify a write-request. This patch makes not only I2C_SLAVE_WRITE_REQUESTED been reported first when IC_INTR_RX_FULL is rising and dev->status isn't STATUS_WRITE_IN_PROGRESS but also I2C_SLAVE_STOP been reported when a STOP condition is received. Signed-off-by: Michael Wu <michael.wu@vatics.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-06i2c: designware: call i2c_dw_read_clear_intrbits_slave() onceMichael Wu
If some bits were cleared by i2c_dw_read_clear_intrbits_slave() in i2c_dw_isr_slave() and not handled immediately, those cleared bits would not be shown again by later i2c_dw_read_clear_intrbits_slave(). They therefore were forgotten to be handled. i2c_dw_read_clear_intrbits_slave() should be called once in an ISR and take its returned state for all later handlings. Signed-off-by: Michael Wu <michael.wu@vatics.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-06i2c: mlxbf: I2C_MLXBF should depend on MELLANOX_PLATFORMGeert Uytterhoeven
The Mellanox BlueField I2C controller is only present on Mellanox BlueField SoCs. Hence add a dependency on MELLANOX_PLATFORM, to prevent asking the user about this driver when configuring a kernel without Mellanox platform support. Fixes: b5b5b32081cd206b ("i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-06i2c: mlxbf: Update author and maintainer email infoKhalil Blaiech
Correct the email addresses of the author and the maintainer of the Mellanox BlueField I2C driver. Fixes: b5b5b32081cd206b ("i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC") Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Khalil Blaiech <kblaiech@nvidia.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-06i2c: mlxbf: Update reference clock frequencyKhalil Blaiech
The reference clock frequency remains the same across Bluefield products. Thus, update the frequency and rename the macro. Fixes: b5b5b32081cd206b ("i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC") Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Khalil Blaiech <kblaiech@nvidia.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-06i2c: mlxbf: Remove unecessary wrapper functionsKhalil Blaiech
Few wrapper functions are useless and can be inlined. So delete mlxbf_i2c_read() and mlxbf_i2c_write() and replace them with readl() and writel(), respectively. Also delete mlxbf_i2c_read_data() and mlxbf_i2c_write() and replace them with ioread32be() and iowrite32be(), respectively. Fixes: b5b5b32081cd206b ("i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC") Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Reviewed-by: Vadim Pasternak <vadimp@nvidia.com> Signed-off-by: Khalil Blaiech <kblaiech@nvidia.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-06i2c: mlxbf: Fix resrticted cast warning of sparseKhalil Blaiech
Address warnings "warning: cast to restricted __be32" reported by sparse. Fixes: b5b5b32081cd206b ("i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC") Reported-by: kernel test robot <lkp@intel.com> Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Reviewed-by: Vadim Pasternak <vadimp@nvidia.com> Signed-off-by: Khalil Blaiech <kblaiech@nvidia.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-06i2c: mlxbf: Add CONFIG_ACPI to guard ACPI function callKhalil Blaiech
The build fails with "implicit declaration of function 'acpi_device_uid'" error. Thus, protect ACPI function calls from being called when CONFIG_ACPI is disabled. Fixes: b5b5b32081cd206b ("i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC") Reported-by: kernel test robot <lkp@intel.com> Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Reviewed-by: Vadim Pasternak <vadimp@nvidia.com> Signed-off-by: Khalil Blaiech <kblaiech@nvidia.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-06i2c: sh_mobile: implement atomic transfersUlrich Hecht
Implements atomic transfers to fix reboot/shutdown on r8a7790 Lager and similar boards. Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> [wsa: some whitespace fixing] Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-03i2c: exynos5: don't check for irq 0Martin Kaiser
platform_get_irq never returns 0. Don't check for this. Make it clear that the error path always returns a negative error code. Signed-off-by: Martin Kaiser <martin@kaiser.cx> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-03i2c: exynos5: fix platform_get_irq error handlingMartin Kaiser
If platform_get_irq returns an error, relay this error to the caller of the probe function. Don't change all errors to -EINVAL. This breaks the case where platform_get_irq returns -EPROBE_DEFER. Signed-off-by: Martin Kaiser <martin@kaiser.cx> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-03i2c: exynos5: remove duplicate error messageMartin Kaiser
platform_get_irq already prints an error message if the requested irq was not found. Don't print another message in the driver. Signed-off-by: Martin Kaiser <martin@kaiser.cx> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-03i2c: mediatek: move dma reset before i2c resetQii Wang
The i2c driver default do dma reset after i2c reset, but sometimes i2c reset will trigger dma tx2rx, then apdma write data to dram which has been i2c_put_dma_safe_msg_buf(kfree). Move dma reset before i2c reset in mtk_i2c_init_hw to fix it. Signed-off-by: Qii Wang <qii.wang@mediatek.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-03i2c: ocores: fix polling mode workaround on FU540-C000 SoCSagar Shrikant Kadam
The FU540-C000 has a broken IRQ and support was added earlier so that it will operate in polling mode, but seems to work only in case interrupts property is missing from the i2c0 dt-node. This should not be the case and the driver should handle polling mode with the interrupt property present in i2c0 node of the device tree. So check if it's the FU540-C000 soc and enable polling mode master xfers, as the IRQ for this chip is broken. Fixes commit c45d4ba86731 ("i2c: ocores: add polling mode workaround for Sifive FU540-C000 SoC") Signed-off-by: Sagar Shrikant Kadam <sagar.kadam@sifive.com> Acked-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-03i2c: owl: Enable asynchronous probingCristian Ciocaltea
Speed up the boot process by using the asynchronous probing feature supported by the recent kernels. For SBCs based on the Actions Semi S500 SoC, the overall boot time is expected to be reduced by 200-300 ms. Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-03i2c: owl: Add support for atomic transfersCristian Ciocaltea
Atomic transfers are required to properly power off a machine through an I2C controlled PMIC, such as the Actions Semi ATC260x series. System shutdown may happen with interrupts being disabled and, as a consequence, the kernel may hang if the driver does not support atomic transfers. This functionality is essentially implemented by polling the FIFO Status register until either Command Execute Completed or NACK Error bits are set. Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> [wsa: rebased to current tree] Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-11-03i2c: at91: remove legacy DMA left oversAlexandre Belloni
Commit dc6df6e90de9 ("i2c: at91: remove legacy DMA support") removed legcy DMA support from the driver. Remove the last use of the definitions from linux/platform_data/dma-atmel.h and stop including this header. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> [wsa: fixed typo in subject] Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-26Revert "i2c: i2c-qcom-geni: Fix DMA transfer race"Douglas Anderson
This reverts commit 02b9aec59243c6240fc42884acc958602146ddf6. As talked about in the patch ("soc: qcom: geni: More properly switch to DMA mode"), swapping the order of geni_se_setup_m_cmd() and geni_se_xx_dma_prep() can sometimes cause corrupted transfers. Thus we traded one problem for another. Now that we've debugged the problem further and fixed the geni helper functions to more disable FIFO interrupts when we move to DMA mode we can revert it and end up with (hopefully) zero problems! To be explicit, the patch ("soc: qcom: geni: More properly switch to DMA mode") is a prerequisite for this one. Fixes: 02b9aec59243 ("i2c: i2c-qcom-geni: Fix DMA transfer race") Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Akash Asthana <akashast@codeaurora.org> Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20201013142448.v2.2.I7b22281453b8a18ab16ef2bfd4c641fb1cc6a92c@changeid Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2020-10-21Merge branch 'i2c/for-5.10' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: - if a host can be a client, too, the I2C core can now use it to emulate SMBus HostNotify support (STM32 and R-Car added this so far) - also for client mode, a testunit has been added. It can create rare situations on the bus, so host controllers can be tested - a binding has been added to mark the bus as "single-master". This allows for better timeout detections - new driver for Mellanox Bluefield - massive refactoring of the Tegra driver - EEPROMs recognized by the at24 driver can now have custom names - rest is driver updates * 'i2c/for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (80 commits) Documentation: i2c: add testunit docs to index i2c: tegra: Improve driver module description i2c: tegra: Clean up whitespaces, newlines and indentation i2c: tegra: Clean up and improve comments i2c: tegra: Clean up printk messages i2c: tegra: Clean up variable names i2c: tegra: Improve formatting of variables i2c: tegra: Check errors for both positive and negative values i2c: tegra: Factor out hardware initialization into separate function i2c: tegra: Factor out register polling into separate function i2c: tegra: Factor out packet header setup from tegra_i2c_xfer_msg() i2c: tegra: Factor out error recovery from tegra_i2c_xfer_msg() i2c: tegra: Rename wait/poll functions i2c: tegra: Remove "dma" variable from tegra_i2c_xfer_msg() i2c: tegra: Remove redundant check in tegra_i2c_issue_bus_clear() i2c: tegra: Remove likely/unlikely from the code i2c: tegra: Remove outdated barrier() i2c: tegra: Clean up variable types i2c: tegra: Reorder location of functions in the code i2c: tegra: Clean up probe function ...
2020-10-10i2c: owl: Clear NACK and BUS error bitsCristian Ciocaltea
When the NACK and BUS error bits are set by the hardware, the driver is responsible for clearing them by writing "1" into the corresponding status registers. Hence perform the necessary operations in owl_i2c_interrupt(). Fixes: d211e62af466 ("i2c: Add Actions Semiconductor Owl family S900 I2C driver") Reported-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-10Revert "i2c: imx: Fix reset of I2SR_IAL flag"Wolfram Sang
This reverts commit fa4d30556883f2eaab425b88ba9904865a4d00f3. An updated version was sent. So, revert this version and give the new version more time for testing. Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-08i2c: meson: fixup rate calculation with filter delayNicolas Belin
Apparently, 15 cycles of the peripheral clock are used by the controller for sampling and filtering. Because this was not known before, the rate calculation is slightly off. Clean up and fix the calculation taking this filtering delay into account. Fixes: 30021e3707a7 ("i2c: add support for Amlogic Meson I2C controller") Signed-off-by: Nicolas Belin <nbelin@baylibre.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-08i2c: meson: keep peripheral clock enabledJerome Brunet
SCL rate appears to be different than what is expected. For example, We get 164kHz on i2c3 of the vim3 when 400kHz is expected. This is partially due to the peripheral clock being disabled when the clock is set. Let's keep the peripheral clock on after probe to fix the problem. This does not affect the SCL output which is still gated when i2c is idle. Fixes: 09af1c2fa490 ("i2c: meson: set clock divider in probe instead of setting it for each transfer") Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-08i2c: meson: fix clock setting overwriteJerome Brunet
When the slave address is written in do_start(), SLAVE_ADDR is written completely. This may overwrite some setting related to the clock rate or signal filtering. Fix this by writing only the bits related to slave address. To avoid causing unexpected changed, explicitly disable filtering or high/low clock mode which may have been left over by the bootloader. Fixes: 30021e3707a7 ("i2c: add support for Amlogic Meson I2C controller") Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-08i2c: imx: Fix reset of I2SR_IAL flagChristian Eggers
According to the "VFxxx Controller Reference Manual" (and the comment block starting at line 97), Vybrid requires writing a one for clearing an interrupt flag. Syncing the method for clearing I2SR_IIF in i2c_imx_isr(). Signed-off-by: Christian Eggers <ceggers@arri.de> Fixes: 4b775022f6fd ("i2c: imx: add struct to hold more configurable quirks") Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: stable@vger.kernel.org Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-05i2c: tegra: Improve driver module descriptionDmitry Osipenko
Use proper spelling of "NVIDIA" and don't designate driver as Tegra2-only since newer SoC generations are supported as well. Reviewed-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-05i2c: tegra: Clean up whitespaces, newlines and indentationDmitry Osipenko
Some places in the code are missing newlines or have unnecessary whitespaces and newlines. This creates inconsistency of the code and hurts readability. This patch removes the unnecessary and adds necessary whitespaces / newlines, clears indentation of the code. Reviewed-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-05i2c: tegra: Clean up and improve commentsDmitry Osipenko
Make all comments to be consistent in regards to capitalization and punctuation, correct spelling and grammar errors, improve wording. Reviewed-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-05i2c: tegra: Clean up printk messagesDmitry Osipenko
This patch unifies style of all messages in the driver by starting them with a lowercase letter and using consistent capitalization and wording for all messages. Reviewed-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-05i2c: tegra: Clean up variable namesDmitry Osipenko
Rename "ret" variables to "err" in order to make code a bit more expressive, emphasizing that the returned value is an error code. Same vice versa, where appropriate. Rename variable "reg" to "val" in order to better reflect the actual usage of the variable in the code and to make naming consistent with the rest of the code. Use briefer names for a few members of the tegra_i2c_dev structure in order to improve readability of the code. All dev/&pdev->dev are replaced with i2c_dev->dev in order to have uniform code style across the driver. Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-05i2c: tegra: Improve formatting of variablesDmitry Osipenko
Reorder definition of variables in the code to have them sorted by length and grouped logically, also replace "unsigned long" with "u32". Do this in order to make code easier to read. Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
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