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path: root/drivers/i2c
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2019-03-08i2c: rcar_i2c: Set the slave address from rcar_i2c_xferIsmael Luceno Cortes
It needs to be done for both reads and writes, so do it at rcar_i2c_xfer to avoid duplication. Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com> Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08i2c: rcar_i2c: Don't mask errors with EREMOTEIO at rcar_i2c_xferIsmael Luceno Cortes
Fix rcar_i2c_xfer return value, previously it was always returning -EREMOTEIO when dealing with errors from calls to the read/write functions. Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com> Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08i2c: rcar_i2c: Fix sending of slave addressesIsmael Luceno Cortes
Do the reset before clearing the MSR, otherwise it may result in a read or write operation instead if the start condition is repeated. Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com> Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08i2c: rcar_i2c: Add comments about registers & valuesIsmael Luceno Cortes
Document the meaning of macros related to registers and values to be written to them. Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com> Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08i2c: rcar_i2c: Setup SCL/SDA delay at rcar_i2c_set_speedIsmael Luceno Cortes
Setting up the delay only needs to be done once; move it to rcar_i2c_set_speed so it's done at initialization time. Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com> Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08i2c: i2c_cdns: Add support for handling arbitration lostSiva Durga Prasad Paladugu
This patch adds support for handling arbitration lost in case of multi master mode. When an arbitration lost is detected, it retries for 10 times before failing. Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-08i2c: i2c_cdns: Fix clearing of all interruptsSiva Durga Prasad Paladugu
The arbitration lost interrupt was not getting cleared while clearing interrupts. This patch fixes this by adding arbitration lost interrupt as well during clear. This patch also removes hardcoded value and defined a macro for it. Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-07i2c: rcar_i2c: Add Gen3 SoC supportMarek Vasut
Add support for R-Car Gen3 SoCs into the driver, which encompases the Gen3 SoC extra timing register handling and 64bit build fixes. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> Cc: Heiko Schocher <hs@denx.de> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-03-07i2c: rcar_iic: Read ICSR only onceMarek Vasut
Read ICSR only once to avoid missing interrupts. This happens on R8A7791 Porter during reset, when reading the PMIC register 0x13, which may fail sometimes because of the missed DTE interrupt. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> Cc: Heiko Schocher <hs@denx.de> Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-02-20Merge branch 'master' of git://git.denx.de/u-boot-tegraTom Rini
2019-02-20Kconfig: tegra: Migrate SYS_I2C_TEGRAPeter Robinson
Migrate SYS_I2C_TEGRA from headers to Kconfig Signed-off-by: Peter Robinson <pbrobinson@gmail.com> Cc: Tom Warren <twarren@nvidia.com> Cc: Stephen Warren <swarren@nvidia.com> Cc: Heiko Schocher <hs@denx.de> Cc: Marcel Ziswiler <marcel.ziswiler@toradex.com> Cc: Peter.Chubb@data61.csiro.au Cc: Lucas Stach <dev@lynxeye.de> Cc: Stefan Agner <stefan.agner@toradex.com> Cc: Alban Bedel <alban.bedel@avionic-design.de> Cc: Allen Martin <amartin@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
2019-02-20i2c: designware: Add error checking on initSimon Glass
At present this driver does not check whether it is able to actually communicate with the I2C controller. It prints a timeout message but still considers the probe to be successful. To fix this, add some checking that the init succeeds. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-02-14i2c: Remove ancient zynq_i2c driverMichal Simek
This driver is replaced by drivers/i2c/i2c-cdns.c DM based driver. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Heiko Schocher <hs@denx.de>
2019-02-11i2c: mux: Generate longer i2c mux nameMichal Simek
For !DM case busses are listed as ZynqMP> i2c bus Bus 0: zynq_0 Bus 1: zynq_0->PCA9544A@0x75:0 Bus 2: zynq_0->PCA9544A@0x75:1 Bus 3: zynq_0->PCA9544A@0x75:2 Bus 4: zynq_1 Bus 5: zynq_1->PCA9548@0x74:0 Bus 6: zynq_1->PCA9548@0x74:1 Bus 7: zynq_1->PCA9548@0x74:2 Bus 8: zynq_1->PCA9548@0x74:3 Bus 9: zynq_1->PCA9548@0x74:4 Bus 10: zynq_1->PCA9548@0x75:0 Bus 11: zynq_1->PCA9548@0x75:1 Bus 12: zynq_1->PCA9548@0x75:2 Bus 13: zynq_1->PCA9548@0x75:3 Bus 14: zynq_1->PCA9548@0x75:4 Bus 15: zynq_1->PCA9548@0x75:5 Bus 16: zynq_1->PCA9548@0x75:6 Bus 17: zynq_1->PCA9548@0x75:7 where is exactly describing i2c bus topology. By moving to DM case i2c mux buses are using names from DT and because i2c-muxes describing sub busses with the same names like i2c@0, etc it is hard to identify which bus is where. Linux is adding topology information to i2c-mux busses to identify them better. This patch is doing the same and composing bus name with topology information. When patch is applied with topology information on zcu102-revA. ZynqMP> i2c bus Bus 0: i2c@ff020000 20: gpio@20, offset len 1, flags 0 21: gpio@21, offset len 1, flags 0 75: i2c-mux@75, offset len 1, flags 0 Bus 2: i2c@ff020000->i2c-mux@75->i2c@0 Bus 3: i2c@ff020000->i2c-mux@75->i2c@1 Bus 4: i2c@ff020000->i2c-mux@75->i2c@2 Bus 1: i2c@ff030000 (active 1) 74: i2c-mux@74, offset len 1, flags 0 75: i2c-mux@75, offset len 1, flags 0 Bus 5: i2c@ff030000->i2c-mux@74->i2c@0 (active 5) 54: eeprom@54, offset len 1, flags 0 Bus 6: i2c@ff030000->i2c-mux@74->i2c@1 Bus 7: i2c@ff030000->i2c-mux@74->i2c@2 Bus 8: i2c@ff030000->i2c-mux@74->i2c@3 Bus 9: i2c@ff030000->i2c-mux@74->i2c@4 Bus 10: i2c@ff030000->i2c-mux@75->i2c@0 Bus 11: i2c@ff030000->i2c-mux@75->i2c@1 Bus 12: i2c@ff030000->i2c-mux@75->i2c@2 Bus 13: i2c@ff030000->i2c-mux@75->i2c@3 Bus 14: i2c@ff030000->i2c-mux@75->i2c@4 Bus 15: i2c@ff030000->i2c-mux@75->i2c@5 Bus 16: i2c@ff030000->i2c-mux@75->i2c@6 Bus 17: i2c@ff030000->i2c-mux@75->i2c@7 Behavior before the patch is applied. ZynqMP> i2c bus Bus 0: i2c@ff020000 20: gpio@20, offset len 1, flags 0 21: gpio@21, offset len 1, flags 0 75: i2c-mux@75, offset len 1, flags 0 Bus 2: i2c@0 Bus 3: i2c@1 Bus 4: i2c@2 Bus 1: i2c@ff030000 (active 1) 74: i2c-mux@74, offset len 1, flags 0 75: i2c-mux@75, offset len 1, flags 0 Bus 5: i2c@0 (active 5) 54: eeprom@54, offset len 1, flags 0 Bus 6: i2c@1 Bus 7: i2c@2 Bus 8: i2c@3 Bus 9: i2c@4 Bus 10: i2c@0 Bus 11: i2c@1 Bus 12: i2c@2 Bus 13: i2c@3 Bus 14: i2c@4 Bus 15: i2c@5 Bus 16: i2c@6 Bus 17: i2c@7 Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-02-11i2c: Fill req_seq in i2c_post_bind()Michal Simek
For i2c controllers which are missing alias in DT there is no req_seq setup. This function is setting up proper ID based on highest found alias ID. On zcu102 this is the behavior when patch is applied. ZynqMP> i2c bus Bus 0: i2c@ff020000 20: gpio@20, offset len 1, flags 0 21: gpio@21, offset len 1, flags 0 75: i2c-mux@75, offset len 1, flags 0 Bus 2: i2c@0 Bus 3: i2c@1 Bus 4: i2c@2 Bus 1: i2c@ff030000 (active 1) 74: i2c-mux@74, offset len 1, flags 0 75: i2c-mux@75, offset len 1, flags 0 Bus 5: i2c@0 (active 5) 54: eeprom@54, offset len 1, flags 0 Bus 6: i2c@1 Bus 7: i2c@2 Bus 8: i2c@3 Bus 9: i2c@4 Bus 10: i2c@0 Bus 11: i2c@1 Bus 12: i2c@2 Bus 13: i2c@3 Bus 14: i2c@4 Bus 15: i2c@5 Bus 16: i2c@6 Bus 17: i2c@7 Before this patch applied (controllers have -1 ID) ZynqMP> i2c bus Bus 0: i2c@ff020000 20: gpio@20, offset len 1, flags 0 21: gpio@21, offset len 1, flags 0 75: i2c-mux@75, offset len 1, flags 0 Bus -1: i2c@0 Bus -1: i2c@1 Bus -1: i2c@2 Bus 1: i2c@ff030000 (active 1) 74: i2c-mux@74, offset len 1, flags 0 75: i2c-mux@75, offset len 1, flags 0 Bus -1: i2c@0 (active 0) 54: eeprom@54, offset len 1, flags 0 Bus -1: i2c@1 Bus -1: i2c@2 Bus -1: i2c@3 Bus -1: i2c@4 Bus -1: i2c@0 Bus -1: i2c@1 Bus -1: i2c@2 Bus -1: i2c@3 Bus -1: i2c@4 Bus -1: i2c@5 Bus -1: i2c@6 Bus -1: i2c@7 Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-02-11i2c: dm: Record maximum id of devices before probing devicesMichal Simek
There is a need to find out the first free i2c ID which can be used for i2s buses (including i2c buses connected to i2c mux). Do it early in init and share this variable with other i2c classes for uniq bus identification. add from hs: fix build problem in i2c-uclass.c for omap devices Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-01-24i2c: cdns: Convert to livetree functionMichal Simek
Update cadence i2c driver to support livetree Similar changes were done by: "net: zynq_gem: convert to use livetree" (sha1: 26026e695afa794ac018a09e79a48120d322b60d) Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2019-01-18i2c: Kconfig: spelling fixesChris Packham
Signed-off-by: Chris Packham <judge.packham@gmail.com>
2019-01-15i2c: Reflect correct dependency for !DM cadence driverMichal Simek
Setup proper DM_I2C dependency. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2019-01-15i2c: mux: Covert to livetree functionsMichal Simek
Updates i2c muxes drivers to support livetree. Similar changes were done by: "net: zynq_gem: convert to use livetree" (sha1: 26026e695afa794ac018a09e79a48120d322b60d) Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2019-01-15i2c: i2c-cdns: Use proper input frequencyTomasz Gorochowik
This is needed to properly calculate i2c bus speed divisors. Signed-off-by: Tomasz Gorochowik <tgorochowik@antmicro.com> Signed-off-by: Wojciech Tatarski <wtatarski@antmicro.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2019-01-15i2c: xiic: Add Xilinx AXI I2C driverMarek Vasut
Add Xilinx AXI I2C controller driver based on the Linux i2c-xiic driver. This driver is stripped of all the IRQ handling and uses pure polling, yet tries to retain most of the structure of the Linux driver to make backporting of fixes easy. Note that the IP has a known limitation on 255 bytes read and write, according to xilinx this is still being worked on [1]. [1] https://forums.xilinx.com/t5/Embedded-Processor-System-Design/AXI-IIC-V2-0-I2C-Master-Reading-multiple-bytes-from-I2C-slave/m-p/854419/highlight/true#M39387 Signed-off-by: Marek Vasut <marex@denx.de> Cc: Michal Simek <monstr@monstr.eu> Cc: Michal Simek <michal.simek@xilinx.com> Cc: Heiko Schocher <hs@denx.de> Reviewed-by: Heiko Schocher <hs@denx.de>
2018-12-12i2c: tegra: Fix regression by implementing a dummy probe_chip() callbackJean-Jacques Hiblot
Commit f32a8007ef0f ("dm: i2c: Make i2c_get_chip_for_busnum() fail if the chip is not detected") introduced a regression for the NVIDIA Jetson TX2. For some reason the xfer callback of the tegra i2c driver doesn't support probing the I2C devices with a 0-length message. Fixing the regression by providing a dummy implementation of probe_chip() that does nothing. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Tested-by: Stephen Warren <swarren@nvidia.com>
2018-12-10i2c: omap24xx_i2c: Use platdata to probe the deviceJean-Jacques Hiblot
This allows the driver to be used without OF_CONTROL. AM335x support DM_SPL but does not use SPL_OF_CONTROL. Enabling DM_I2C in SPL thus requires that the omap I2C can be passed platdata. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2018-12-10i2c: omap24xx_i2c: Move away from SoC specific headers for reg offsetVignesh R
Move away from SoC specific headers to handle different register layout. Instead use driver data to get appropriate register layouts like in the kernel. While at it, perform some mostly cosmetic alignment/cleanup in the functions being updated. Signed-off-by: Vignesh R <vigneshr@ti.com> Signed-off-by: Andreas Dannenberg <dannenberg@ti.com> Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2018-12-10dm: i2c: Make i2c_get_chip_for_busnum() fail if the chip is not detectedJean-Jacques Hiblot
i2c_get_chip_for_busnum() really should check the presence of the chip on the bus. Most of the users of this function assume that this is done. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2018-11-29dm: sandbox: i2c: Use new emulator parent uclassSimon Glass
Update the device tree, sandbox i2c driver and tests to use the new emulation parent to hold emulators. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-11-29dm: sandbox: i2c: Add a new 'emulation parent' uclassSimon Glass
Sandbox i2c works using emulation drivers which are currently children of the i2c device: rtc_0: rtc@43 { reg = <0x43>; compatible = "sandbox-rtc"; emul { compatible = "sandbox,i2c-rtc"; }; }; In this case the emulation device is attached to i2c bus on address 0x43 and provides the Real-Time-Clock (RTC) functionality. However this is not ideal, since every device on an I2C bus has a child device. This is only really the case for sandbox, but we want to avoid special-case code for sandbox. A better approach seems to be to add a separate node on the bus, an 'emulation parent'. This can be given a bogus address (such as 0xff) and hides all the emulators away. Then we can use a phandle to point from the device to the correct emualtor, and only on sandbox. The code to find an emulator does not interfere with normal i2c operation. Add a new UCLASS_I2C_EMUL_PARENT uclass which allows finding an emulator given a bus, and finding a bus given an emulator. This will be used in a follow-on patch. Signed-off-by: Simon Glass <sjg@chromium.org>
2018-11-16i2c: stm32f7: change setup struct to constPatrick Delaunay
Change static array to const when it is useful to save memory (move stm32f7_setup=0x18 from .data to .rodata section) Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2018-11-16i2c: stm32f7: cosmetic: clean the driverPatrick Delaunay
Solve alignments issues in the driver to avoid checkpatch error. Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2018-11-14i2c: omap24xx: Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL checkBin Meng
When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be bound before relocation. However due to a bug in the DM core, the flag only takes effect when devices are statically declared via U_BOOT_DEVICE(). This bug has been fixed recently by commit "dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in lists_bind_fdt()", but with the fix, it has a side effect that all existing drivers that declared DM_FLAG_PRE_RELOC flag will be bound before relocation now. This may expose potential boot failure on some boards due to insufficient memory during the pre-relocation stage. To mitigate this potential impact, the following changes are implemented: - Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver only supports configuration from device tree (OF_CONTROL) - Keep DM_FLAG_PRE_RELOC flag in the driver only if the device is statically declared via U_BOOT_DEVICE() - Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for drivers that support both statically declared devices and configuration from device tree Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-10-25Merge tag 'u-boot-imx-20181025' of git://git.denx.de/u-boot-imxTom Rini
Merged imx8 architecture, fix build for imx8 + warnings
2018-10-22i2c: imx_lpi2c: fix typo and register base address formatAnatolij Gustschin
Output the register base address in hex notation. Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Heiko Schocher <hs@denx.de>
2018-10-12i2c: fix: Add support for the Arm's Versatile Express I2C controllerHeiko Schocher
accidentially while fixing merge errors for patch: https://lists.denx.de/pipermail/u-boot/2018-September/342278.html missed to add files: MAINTAINERS drivers/i2c/Kconfig drivers/i2c/Makefile add them with this patch. Signed-off-by: Heiko Schocher <hs@denx.de> Acked-by: Liviu Dudau <liviu.dudau@foss.arm.com>
2018-10-03i2c: Add support for the Arm's Versatile Express I2C controller.Liviu Dudau
The Arm Versatile Express I2C controller is a simple register-based controller that uses a register to control the state of the SCL and SDA lines. Add support for it. Signed-off-by: Liviu Dudau <liviu.dudau@foss.arm.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2018-09-14Merge branch 'master' of git://git.denx.de/u-boot-i2cTom Rini
2018-09-14i2c: Drop CONFIG_SYS_I2C_MXSTuomas Tynkkynen
Last user of this driver went away in May 2017, in commit eb5ba3aefdf0f6 ("i2c: Drop use of CONFIG_I2C_HARD") Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
2018-09-11DM: OMAP24XX_I2C: Reduce overhead when used with OF_PLATDATAAdam Ford
Platforms with limited resources in SPL may enably OF_PLATDATA, this limits some of the library functions and cannot extract data from the device tree. This patch adds additional wrappers around these functions to only allow them when OF_CONTROL is enabled and OF_PLATDATA is not. Signed-off-by: Adam Ford <aford173@gmail.com>
2018-09-11DM: I2C: Reduce overhead when used with OF_PLATDATAAdam Ford
Platforms with limited resources in SPL may enably OF_PLATDATA, this limits some of the library functions and cannot extract data from the device tree. This patch adds additional wrappers around these functions to only allow them when OF_CONTROL is enabled and OF_PLATDATA is not. Signed-off-by: Adam Ford <aford173@gmail.com>
2018-08-17Convert CONFIG_SYS_I2C_DAVINCI to KconfigAdam Ford
This converts the following to Kconfig: CONFIG_SYS_I2C_DAVINCI Signed-off-by: Adam Ford <aford173@gmail.com>
2018-08-17kconfig: fix typo 'parition'Simon Goldschmidt
Replaced misspelled words "parition"/"paritioning" (missing 't') in two Kconfig files by correct words "partition"/"partitioning" Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
2018-08-06i2c: imx_lpi2c: add uclass api supportPeng Fan
Use uclass clk api to get per clk when CONFIG_CLK enabled. Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Anatolij Gustschin <agust@denx.de>
2018-08-06i2c-mux: pca954x: support pca9646 i2c switchPeng Fan
Add the PCA9646 support, which is 2-wire bus switch and buffered 4-channel. Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Anatolij Gustschin <agust@denx.de>
2018-07-21rockchip: i2c: enable i2c controller for rk3066 and rk3188Alexander Kochetkov
rk3066 and rk3188 has two I2C controller implementations. Current I2C driver wan't work with legacy implementation. Switching between controllers is performed using a bit inside GFR_SOC_CON1 register. The bit setting is performed by pinctrl driver. The patch ask pinctrl to do settings. Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com> Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> [fix warnings by including the rk3228 variant in the compatible-list]: Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
2018-07-12lpi2c: Add bus busy error handlingYe Li
When doing "i2c dev 4; i2c probe" with ENET daughter card connected on iMX8QXP MEK board, we met a i2c bus busy issue, that the BBF of lpi2c always show busy, but the master is idle, and stop is detected (SDF set). This patch addes a handling to re-init the lpi2c master for this case. Then the issue can be worked around. Signed-off-by: Ye Li <ye.li@nxp.com> Acked-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2018-07-12lpi2c: Fix bus stop problem in xferYe Li
In xfer function, both bus_i2c_read and bus_i2c_write will send a STOP command. This causes a problem when reading register data from i2c device. Generally two operations comprise the register data reading: 1. Write the register address to i2c device. START | chip_addr | W | ACK | register_addr | ACK | 2. Read the Data from i2c device. START | chip_addr | R | ACK | DATA | NACK | STOP The STOP command should happen at the end of the transfer, otherwise we will always get data from register address 0 Signed-off-by: Ye Li <ye.li@nxp.com> Acked-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2018-07-12imx: lpi2c: fix clock issue when NACK detectedGao Pan
For LPI2C IP, NACK is detected by the rising edge of the ninth clock. In current uboot driver, once NACK is detected, it will reset and then disable LPI2C master. As a result, we can never see the falling edge of the ninth clock. Signed-off-by: Gao Pan <pandy.gao@nxp.com> Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2018-07-12imx_lpi2c: Update lpi2c driver to support imx8Ye Li
Add compatible string for i.MX8 and move imx_lpi2c.h from mx7ulp directory to u-boot include directory as a common header file. Signed-off-by: Ye Li <ye.li@nxp.com> Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2018-06-19meson: use the clock driverBeniamino Galvani
Use the clk framework to initialize clocks from drivers that need them instead of having hardcoded frequencies and initializations from board code. Signed-off-by: Beniamino Galvani <b.galvani@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2018-06-07i2c: mvtwsi: disable i2c slave on Armada 38xBaruch Siach
Equivalent code that disables the hidden i2c0 slave already exists in the Turris Omnia platform specific code. But this hidden i2c0 slave that interferes the i2c bus is not board specific. Armada 38x SoCs and at least some Kirkwood variants are affected as well. Add code to disable this slave to the i2c bus driver to make it work on all affected hardware. Use the bind callback because we want this to always run at boot, regardless of whether U-Boot uses the i2c bus. Cc: Rabeeh Khoury <rabeeh@solid-run.com> Cc: Chris Packham <judge.packham@gmail.com> Reviewed-by: Stefan Roese <sr@denx.de> Reviewed-by: Heiko Schocher <hs@denx.de> Signed-off-by: Baruch Siach <baruch@tkos.co.il>
generated by cgit (git 2.34.1) at 2024-12-27 12:56:49 +0000