2 # I2C subsystem configuration
8 bool "Enable Driver Model for I2C drivers"
11 Enable driver model for I2C. The I2C uclass interface: probe, read,
12 write and speed, is implemented with the bus drivers operations,
13 which provide methods for bus setting and data transfer. Each chip
14 device (bus child) info is kept as parent platdata. The interface
15 is defined in include/i2c.h. When i2c bus driver supports the i2c
16 uclass, but the device drivers not, then DM_I2C_COMPAT config can
17 be used as compatibility layer.
20 bool "Enable I2C compatibility layer"
23 Enable old-style I2C functions for compatibility with existing code.
24 This option can be enabled as a temporary measure to avoid needing
25 to convert all code for a board in a single commit. It should not
26 be enabled for any board in an official release.
28 config I2C_CROS_EC_TUNNEL
29 tristate "Chrome OS EC tunnel I2C bus"
32 This provides an I2C bus that will tunnel i2c commands through to
33 the other side of the Chrome OS EC to the I2C bus connected there.
34 This will work whatever the interface used to talk to the EC (SPI,
35 I2C or LPC). Some Chromebooks use this when the hardware design
36 does not allow direct access to the main PMIC from the AP.
38 config I2C_CROS_EC_LDO
39 bool "Provide access to LDOs on the Chrome OS EC"
42 On many Chromebooks the main PMIC is inaccessible to the AP. This is
43 often dealt with by using an I2C pass-through interface provided by
44 the EC. On some unfortunate models (e.g. Spring) the pass-through
45 is not available, and an LDO message is available instead. This
46 option enables a driver which provides very basic access to those
47 regulators, via the EC. We implement this as an I2C bus which
48 emulates just the TPS65090 messages we know about. This is done to
49 avoid duplicating the logic in the TPS65090 regulator driver for
50 enabling/disabling an LDO.
52 config I2C_SET_DEFAULT_BUS_NUM
53 bool "Set default I2C bus number"
56 Set default number of I2C bus to be accessed. This option provides
57 behaviour similar to old (i.e. pre DM) I2C bus driver.
59 config I2C_DEFAULT_BUS_NUMBER
60 hex "I2C default bus number"
61 depends on I2C_SET_DEFAULT_BUS_NUM
64 Number of default I2C bus to use
67 bool "Enable Driver Model for software emulated I2C bus driver"
68 depends on DM_I2C && DM_GPIO
70 Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
71 configuration is given by the device tree. Kernel-style device tree
72 bindings are supported.
73 Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
76 bool "Atmel I2C driver"
77 depends on DM_I2C && ARCH_AT91
79 Add support for the Atmel I2C driver. A serious problem is that there
80 is no documented way to issue repeated START conditions for more than
81 two messages, as needed to support combined I2C messages. Use the
82 i2c-gpio driver unless your system can cope with this limitation.
83 Binding info: doc/device-tree-bindings/i2c/i2c-at91.txt
86 bool "Freescale I2C bus driver"
89 Add support for Freescale I2C busses as used on MPC8240, MPC8245, and
92 config SYS_I2C_CADENCE
93 tristate "Cadence I2C Controller"
94 depends on DM_I2C && (ARCH_ZYNQ || ARM64)
96 Say yes here to select Cadence I2C Host Controller. This controller is
97 e.g. used by Xilinx Zynq.
99 config SYS_I2C_DAVINCI
100 bool "Davinci I2C Controller"
101 depends on (ARCH_KEYSTONE || ARCH_DAVINCI)
103 Say yes here to add support for Davinci and Keystone I2C controller
106 bool "Designware I2C Controller"
109 Say yes here to select the Designware I2C Host Controller. This
110 controller is used in various SoCs, e.g. the ST SPEAr, Altera
111 SoCFPGA, Synopsys ARC700 and some Intel x86 SoCs.
113 config SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED
114 bool "DW I2C Enable Status Register not supported"
115 depends on SYS_I2C_DW && (TARGET_SPEAR300 || TARGET_SPEAR310 || \
116 TARGET_SPEAR320 || TARGET_SPEAR600 || TARGET_X600)
119 Some versions of the Designware I2C controller do not support the
120 enable status register. This config option can be enabled in such
123 config SYS_I2C_ASPEED
124 bool "Aspeed I2C Controller"
125 depends on DM_I2C && ARCH_ASPEED
127 Say yes here to select Aspeed I2C Host Controller. The driver
128 supports AST2500 and AST2400 controllers, but is very limited.
129 Only single master mode is supported and only byte-by-byte
130 synchronous reads and writes are supported, no Pool Buffers or DMA.
133 bool "Intel I2C/SMBUS driver"
136 Add support for the Intel SMBUS driver. So far this driver is just
137 a stub which perhaps some basic init. There is no implementation of
138 the I2C API meaning that any I2C operations will immediately fail
141 config SYS_I2C_IMX_LPI2C
142 bool "NXP i.MX LPI2C driver"
144 Add support for the NXP i.MX LPI2C driver.
147 bool "Amlogic Meson I2C driver"
148 depends on DM_I2C && ARCH_MESON
150 Add support for the I2C controller available in Amlogic Meson
151 SoCs. The controller supports programmable bus speed including
152 standard (100kbits/s) and fast (400kbit/s) speed and allows the
153 software to define a flexible format of the bit streams. It has an
154 internal buffer holding up to 8 bytes for transfers and supports
155 both 7-bit and 10-bit addresses.
158 bool "NXP MXC I2C driver"
160 Add support for the NXP I2C driver. This supports up to four bus
161 channels and operating on standard mode up to 100 kbits/s and fast
162 mode up to 400 kbits/s.
165 config SYS_I2C_MXC_I2C1
168 Add support for NXP MXC I2C Controller 1.
169 Required for SoCs which have I2C MXC controller 1 eg LS1088A, LS2080A
171 config SYS_I2C_MXC_I2C2
174 Add support for NXP MXC I2C Controller 2.
175 Required for SoCs which have I2C MXC controller 2 eg LS1088A, LS2080A
177 config SYS_I2C_MXC_I2C3
180 Add support for NXP MXC I2C Controller 3.
181 Required for SoCs which have I2C MXC controller 3 eg LS1088A, LS2080A
183 config SYS_I2C_MXC_I2C4
186 Add support for NXP MXC I2C Controller 4.
187 Required for SoCs which have I2C MXC controller 4 eg LS1088A, LS2080A
189 config SYS_I2C_MXC_I2C5
192 Add support for NXP MXC I2C Controller 5.
193 Required for SoCs which have I2C MXC controller 5 eg LX2160A
195 config SYS_I2C_MXC_I2C6
198 Add support for NXP MXC I2C Controller 6.
199 Required for SoCs which have I2C MXC controller 6 eg LX2160A
201 config SYS_I2C_MXC_I2C7
204 Add support for NXP MXC I2C Controller 7.
205 Required for SoCs which have I2C MXC controller 7 eg LX2160A
207 config SYS_I2C_MXC_I2C8
210 Add support for NXP MXC I2C Controller 8.
211 Required for SoCs which have I2C MXC controller 8 eg LX2160A
215 config SYS_MXC_I2C1_SPEED
216 int "I2C Channel 1 speed"
217 default 40000000 if TARGET_LS2080A_SIMU || TARGET_LS2080A_EMU
220 MXC I2C Channel 1 speed
222 config SYS_MXC_I2C1_SLAVE
230 config SYS_MXC_I2C2_SPEED
231 int "I2C Channel 2 speed"
232 default 40000000 if TARGET_LS2080A_SIMU || TARGET_LS2080A_EMU
235 MXC I2C Channel 2 speed
237 config SYS_MXC_I2C2_SLAVE
245 config SYS_MXC_I2C3_SPEED
246 int "I2C Channel 3 speed"
249 MXC I2C Channel 3 speed
251 config SYS_MXC_I2C3_SLAVE
259 config SYS_MXC_I2C4_SPEED
260 int "I2C Channel 4 speed"
263 MXC I2C Channel 4 speed
265 config SYS_MXC_I2C4_SLAVE
273 config SYS_MXC_I2C5_SPEED
274 int "I2C Channel 5 speed"
277 MXC I2C Channel 5 speed
279 config SYS_MXC_I2C5_SLAVE
287 config SYS_MXC_I2C6_SPEED
288 int "I2C Channel 6 speed"
291 MXC I2C Channel 6 speed
293 config SYS_MXC_I2C6_SLAVE
301 config SYS_MXC_I2C7_SPEED
302 int "I2C Channel 7 speed"
305 MXC I2C Channel 7 speed
307 config SYS_MXC_I2C7_SLAVE
315 config SYS_MXC_I2C8_SPEED
316 int "I2C Channel 8 speed"
319 MXC I2C Channel 8 speed
321 config SYS_MXC_I2C8_SLAVE
328 config SYS_I2C_OMAP24XX
329 bool "TI OMAP2+ I2C driver"
330 depends on ARCH_OMAP2PLUS
332 Add support for the OMAP2+ I2C driver.
335 config SYS_OMAP24_I2C_SLAVE
336 int "I2C Slave addr channel 0"
339 OMAP24xx I2C Slave address channel 0
341 config SYS_OMAP24_I2C_SPEED
342 int "I2C Slave channel 0 speed"
345 OMAP24xx Slave speed channel 0
348 config SYS_I2C_RCAR_I2C
349 bool "Renesas RCar I2C driver"
350 depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
352 Support for Renesas RCar I2C controller.
354 config SYS_I2C_RCAR_IIC
355 bool "Renesas RCar Gen3 IIC driver"
356 depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
358 Support for Renesas RCar Gen3 IIC controller.
360 config SYS_I2C_ROCKCHIP
361 bool "Rockchip I2C driver"
364 Add support for the Rockchip I2C driver. This is used with various
365 Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips
366 have several I2C ports and all are provided, controlled by the
369 config SYS_I2C_SANDBOX
370 bool "Sandbox I2C driver"
371 depends on SANDBOX && DM_I2C
373 Enable I2C support for sandbox. This is an emulation of a real I2C
374 bus. Devices can be attached to the bus using the device tree
375 which specifies the driver to use. See sandbox.dts as an example.
377 config SYS_I2C_S3C24X0
378 bool "Samsung I2C driver"
379 depends on ARCH_EXYNOS4 && DM_I2C
381 Support for Samsung I2C controller as Samsung SoCs.
383 config SYS_I2C_STM32F7
384 bool "STMicroelectronics STM32F7 I2C support"
385 depends on (STM32F7 || STM32H7 || ARCH_STM32MP) && DM_I2C
387 Enable this option to add support for STM32 I2C controller
388 introduced with STM32F7/H7 SoCs. This I2C controller supports :
389 _ Slave and master modes
390 _ Multimaster capability
391 _ Standard-mode (up to 100 kHz)
392 _ Fast-mode (up to 400 kHz)
393 _ Fast-mode Plus (up to 1 MHz)
394 _ 7-bit and 10-bit addressing mode
395 _ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)
396 _ All 7-bit addresses acknowledge mode
398 _ Programmable setup and hold times
399 _ Easy to use event management
400 _ Optional clock stretching
404 bool "NVIDIA Tegra internal I2C controller"
407 Support for NVIDIA I2C controller available in Tegra SoCs.
409 config SYS_I2C_UNIPHIER
410 bool "UniPhier I2C driver"
411 depends on ARCH_UNIPHIER && DM_I2C
414 Support for UniPhier I2C controller driver. This I2C controller
415 is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
417 config SYS_I2C_UNIPHIER_F
418 bool "UniPhier FIFO-builtin I2C driver"
419 depends on ARCH_UNIPHIER && DM_I2C
422 Support for UniPhier FIFO-builtin I2C controller driver.
423 This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
425 config SYS_I2C_VERSATILE
426 bool "Arm Ltd Versatile I2C bus driver"
427 depends on DM_I2C && (TARGET_VEXPRESS_CA15_TC2 || TARGET_VEXPRESS64_JUNO)
429 Add support for the Arm Ltd Versatile Express I2C driver. The I2C host
430 controller is present in the development boards manufactured by Arm Ltd.
432 config SYS_I2C_MVTWSI
433 bool "Marvell I2C driver"
436 Support for Marvell I2C controllers as used on the orion5x and
437 kirkwood SoC families.
439 config TEGRA186_BPMP_I2C
440 bool "Enable Tegra186 BPMP-based I2C driver"
441 depends on TEGRA186_BPMP
443 Support for Tegra I2C controllers managed by the BPMP (Boot and
444 Power Management Processor). On Tegra186, some I2C controllers are
445 directly controlled by the main CPU, whereas others are controlled
446 by the BPMP, and can only be accessed by the main CPU via IPC
447 requests to the BPMP. This driver covers the latter case.
449 config SYS_I2C_BUS_MAX
451 depends on ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_SOCFPGA
453 default 3 if OMAP34XX || AM33XX || AM43XX || ARCH_KEYSTONE
454 default 4 if ARCH_SOCFPGA || OMAP44XX || TI814X
455 default 5 if OMAP54XX
457 Define the maximum number of available I2C buses.
459 config SYS_I2C_XILINX_XIIC
460 bool "Xilinx AXI I2C driver"
463 Support for Xilinx AXI I2C controller.
466 bool "gdsys IHS I2C driver"
469 Support for gdsys IHS I2C driver on FPGA bus.
471 source "drivers/i2c/muxes/Kconfig"