2 # I2C subsystem configuration
10 This is a stand-in for an option to enable I2C support. In fact this
11 simply enables building of the I2C directory for U-Boot. The actual
12 I2C feature is enabled by DM_I2C (for driver model) and
13 the #define CONFIG_SYS_I2C_LEGACY (for the legacy I2C stack).
15 So at present there is no need to ever disable this option.
19 Enable support for the I2C (Inter-Integrated Circuit) bus in U-Boot.
20 I2C works with a clock and data line which can be driven by a
21 one or more masters or slaves. It is a fairly complex bus but is
22 widely used as it only needs two lines for communication. Speeds of
23 400kbps are typical but up to 3.4Mbps is supported by some
24 hardware. Enable this option to build the drivers in drivers/i2c as
25 part of a U-Boot build.
30 bool "Enable Driver Model for I2C drivers"
33 Enable driver model for I2C. The I2C uclass interface: probe, read,
34 write and speed, is implemented with the bus drivers operations,
35 which provide methods for bus setting and data transfer. Each chip
36 device (bus child) info is kept as parent plat. The interface
37 is defined in include/i2c.h.
40 bool "Enable Driver Model for I2C drivers in SPL"
41 depends on SPL_DM && DM_I2C
44 Enable driver model for I2C. The I2C uclass interface: probe, read,
45 write and speed, is implemented with the bus drivers operations,
46 which provide methods for bus setting and data transfer. Each chip
47 device (bus child) info is kept as parent platdata. The interface
48 is defined in include/i2c.h.
50 config I2C_CROS_EC_TUNNEL
51 tristate "Chrome OS EC tunnel I2C bus"
54 This provides an I2C bus that will tunnel i2c commands through to
55 the other side of the Chrome OS EC to the I2C bus connected there.
56 This will work whatever the interface used to talk to the EC (SPI,
57 I2C or LPC). Some Chromebooks use this when the hardware design
58 does not allow direct access to the main PMIC from the AP.
60 config I2C_CROS_EC_LDO
61 bool "Provide access to LDOs on the Chrome OS EC"
64 On many Chromebooks the main PMIC is inaccessible to the AP. This is
65 often dealt with by using an I2C pass-through interface provided by
66 the EC. On some unfortunate models (e.g. Spring) the pass-through
67 is not available, and an LDO message is available instead. This
68 option enables a driver which provides very basic access to those
69 regulators, via the EC. We implement this as an I2C bus which
70 emulates just the TPS65090 messages we know about. This is done to
71 avoid duplicating the logic in the TPS65090 regulator driver for
72 enabling/disabling an LDO.
74 config I2C_SET_DEFAULT_BUS_NUM
75 bool "Set default I2C bus number"
78 Set default number of I2C bus to be accessed. This option provides
79 behaviour similar to old (i.e. pre DM) I2C bus driver.
81 config I2C_DEFAULT_BUS_NUMBER
82 hex "I2C default bus number"
83 depends on I2C_SET_DEFAULT_BUS_NUM
86 Number of default I2C bus to use
89 bool "Enable Driver Model for software emulated I2C bus driver"
90 depends on DM_I2C && DM_GPIO
92 Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
93 configuration is given by the device tree. Kernel-style device tree
94 bindings are supported.
95 Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
97 config SPL_DM_I2C_GPIO
98 bool "Enable Driver Model for software emulated I2C bus driver in SPL"
99 depends on SPL_DM && DM_I2C_GPIO && SPL_DM_GPIO && SPL_GPIO
102 Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
103 configuration is given by the device tree. Kernel-style device tree
104 bindings are supported.
105 Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
108 bool "Atmel I2C driver"
109 depends on DM_I2C && ARCH_AT91
111 Add support for the Atmel I2C driver. A serious problem is that there
112 is no documented way to issue repeated START conditions for more than
113 two messages, as needed to support combined I2C messages. Use the
114 i2c-gpio driver unless your system can cope with this limitation.
115 Binding info: doc/device-tree-bindings/i2c/i2c-at91.txt
118 bool "Broadcom I2C driver"
122 Add support for Broadcom I2C driver.
123 Say yes here to to enable the Broadco I2C driver.
126 bool "Freescale I2C bus driver"
129 Add support for Freescale I2C busses as used on MPC8240, MPC8245, and
132 config SYS_I2C_CADENCE
133 tristate "Cadence I2C Controller"
136 Say yes here to select Cadence I2C Host Controller. This controller is
137 e.g. used by Xilinx Zynq.
140 tristate "Cortina-Access I2C Controller"
141 depends on DM_I2C && CORTINA_PLATFORM
144 Add support for the Cortina Access I2C host controller.
145 Say yes here to select Cortina-Access I2C Host Controller.
147 config SYS_I2C_DAVINCI
148 bool "Davinci I2C Controller"
149 depends on (ARCH_KEYSTONE || ARCH_DAVINCI)
151 Say yes here to add support for Davinci and Keystone I2C controller
154 bool "Designware I2C Controller"
157 Say yes here to select the Designware I2C Host Controller. This
158 controller is used in various SoCs, e.g. the ST SPEAr, Altera
159 SoCFPGA, Synopsys ARC700 and some Intel x86 SoCs.
161 config SYS_I2C_ASPEED
162 bool "Aspeed I2C Controller"
163 depends on DM_I2C && ARCH_ASPEED
165 Say yes here to select Aspeed I2C Host Controller. The driver
166 supports AST2500 and AST2400 controllers, but is very limited.
167 Only single master mode is supported and only byte-by-byte
168 synchronous reads and writes are supported, no Pool Buffers or DMA.
171 bool "Intel I2C/SMBUS driver"
174 Add support for the Intel SMBUS driver. So far this driver is just
175 a stub which perhaps some basic init. There is no implementation of
176 the I2C API meaning that any I2C operations will immediately fail
179 config SYS_I2C_IMX_LPI2C
180 bool "NXP i.MX LPI2C driver"
182 Add support for the NXP i.MX LPI2C driver.
184 config SYS_I2C_LPC32XX
185 bool "LPC32XX I2C driver"
186 depends on ARCH_LPC32XX
188 Enable support for the LPC32xx I2C driver.
191 bool "Amlogic Meson I2C driver"
192 depends on DM_I2C && ARCH_MESON
194 Add support for the I2C controller available in Amlogic Meson
195 SoCs. The controller supports programmable bus speed including
196 standard (100kbits/s) and fast (400kbit/s) speed and allows the
197 software to define a flexible format of the bit streams. It has an
198 internal buffer holding up to 8 bytes for transfers and supports
199 both 7-bit and 10-bit addresses.
202 bool "NXP MXC I2C driver"
204 Add support for the NXP I2C driver. This supports up to four bus
205 channels and operating on standard mode up to 100 kbits/s and fast
206 mode up to 400 kbits/s.
208 # These settings are not used with DM_I2C, however SPL doesn't use
209 # DM_I2C even if DM_I2C is enabled, and so might use these settings even
210 # when main u-boot does not!
211 if SYS_I2C_MXC && (!DM_I2C || SPL)
212 config SYS_I2C_MXC_I2C1
215 Add support for NXP MXC I2C Controller 1.
216 Required for SoCs which have I2C MXC controller 1 eg LS1088A, LS2080A
218 config SYS_I2C_MXC_I2C2
221 Add support for NXP MXC I2C Controller 2.
222 Required for SoCs which have I2C MXC controller 2 eg LS1088A, LS2080A
224 config SYS_I2C_MXC_I2C3
227 Add support for NXP MXC I2C Controller 3.
228 Required for SoCs which have I2C MXC controller 3 eg LS1088A, LS2080A
230 config SYS_I2C_MXC_I2C4
233 Add support for NXP MXC I2C Controller 4.
234 Required for SoCs which have I2C MXC controller 4 eg LS1088A, LS2080A
236 config SYS_I2C_MXC_I2C5
239 Add support for NXP MXC I2C Controller 5.
240 Required for SoCs which have I2C MXC controller 5 eg LX2160A
242 config SYS_I2C_MXC_I2C6
245 Add support for NXP MXC I2C Controller 6.
246 Required for SoCs which have I2C MXC controller 6 eg LX2160A
248 config SYS_I2C_MXC_I2C7
251 Add support for NXP MXC I2C Controller 7.
252 Required for SoCs which have I2C MXC controller 7 eg LX2160A
254 config SYS_I2C_MXC_I2C8
257 Add support for NXP MXC I2C Controller 8.
258 Required for SoCs which have I2C MXC controller 8 eg LX2160A
262 config SYS_MXC_I2C1_SPEED
263 int "I2C Channel 1 speed"
264 default 40000000 if TARGET_LS2080A_EMU
267 MXC I2C Channel 1 speed
269 config SYS_MXC_I2C1_SLAVE
277 config SYS_MXC_I2C2_SPEED
278 int "I2C Channel 2 speed"
279 default 40000000 if TARGET_LS2080A_EMU
282 MXC I2C Channel 2 speed
284 config SYS_MXC_I2C2_SLAVE
292 config SYS_MXC_I2C3_SPEED
293 int "I2C Channel 3 speed"
296 MXC I2C Channel 3 speed
298 config SYS_MXC_I2C3_SLAVE
306 config SYS_MXC_I2C4_SPEED
307 int "I2C Channel 4 speed"
310 MXC I2C Channel 4 speed
312 config SYS_MXC_I2C4_SLAVE
320 config SYS_MXC_I2C5_SPEED
321 int "I2C Channel 5 speed"
324 MXC I2C Channel 5 speed
326 config SYS_MXC_I2C5_SLAVE
334 config SYS_MXC_I2C6_SPEED
335 int "I2C Channel 6 speed"
338 MXC I2C Channel 6 speed
340 config SYS_MXC_I2C6_SLAVE
348 config SYS_MXC_I2C7_SPEED
349 int "I2C Channel 7 speed"
352 MXC I2C Channel 7 speed
354 config SYS_MXC_I2C7_SLAVE
362 config SYS_MXC_I2C8_SPEED
363 int "I2C Channel 8 speed"
366 MXC I2C Channel 8 speed
368 config SYS_MXC_I2C8_SLAVE
375 config SYS_I2C_NEXELL
376 bool "Nexell I2C driver"
379 Add support for the Nexell I2C driver. This is used with various
380 Nexell parts such as S5Pxx18 series SoCs. All chips
381 have several I2C ports and all are provided, controlled by the
384 config SYS_I2C_OCORES
385 bool "ocores I2C driver"
388 Add support for ocores I2C controller. For details see
389 https://opencores.org/projects/i2c
391 config SYS_I2C_OMAP24XX
392 bool "TI OMAP2+ I2C driver"
393 depends on ARCH_OMAP2PLUS || ARCH_K3
395 Add support for the OMAP2+ I2C driver.
398 config SYS_OMAP24_I2C_SLAVE
399 int "I2C Slave addr channel 0"
402 OMAP24xx I2C Slave address channel 0
404 config SYS_OMAP24_I2C_SPEED
405 int "I2C Slave channel 0 speed"
408 OMAP24xx Slave speed channel 0
411 config SYS_I2C_RCAR_I2C
412 bool "Renesas RCar I2C driver"
413 depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
415 Support for Renesas RCar I2C controller.
417 config SYS_I2C_RCAR_IIC
418 bool "Renesas RCar Gen3 IIC driver"
419 depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
421 Support for Renesas RCar Gen3 IIC controller.
423 config SYS_I2C_ROCKCHIP
424 bool "Rockchip I2C driver"
427 Add support for the Rockchip I2C driver. This is used with various
428 Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips
429 have several I2C ports and all are provided, controlled by the
432 config SYS_I2C_SANDBOX
433 bool "Sandbox I2C driver"
434 depends on SANDBOX && DM_I2C
436 Enable I2C support for sandbox. This is an emulation of a real I2C
437 bus. Devices can be attached to the bus using the device tree
438 which specifies the driver to use. See sandbox.dts as an example.
440 config SYS_I2C_OCTEON
441 bool "Octeon II/III/TX/TX2 I2C driver"
442 depends on (ARCH_OCTEON || ARCH_OCTEONTX || ARCH_OCTEONTX2) && DM_I2C
445 Add support for the Marvell Octeon I2C driver. This is used with
446 various Octeon parts such as Octeon II/III and OcteonTX/TX2. All
447 chips have several I2C ports and all are provided, controlled by
450 config SYS_I2C_S3C24X0
451 bool "Samsung I2C driver"
452 depends on (ARCH_EXYNOS4 || ARCH_EXYNOS5) && DM_I2C
454 Support for Samsung I2C controller as Samsung SoCs.
456 config SYS_I2C_STM32F7
457 bool "STMicroelectronics STM32F7 I2C support"
458 depends on (STM32F7 || STM32H7 || ARCH_STM32MP) && DM_I2C
460 Enable this option to add support for STM32 I2C controller
461 introduced with STM32F7/H7 SoCs. This I2C controller supports :
462 _ Slave and master modes
463 _ Multimaster capability
464 _ Standard-mode (up to 100 kHz)
465 _ Fast-mode (up to 400 kHz)
466 _ Fast-mode Plus (up to 1 MHz)
467 _ 7-bit and 10-bit addressing mode
468 _ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)
469 _ All 7-bit addresses acknowledge mode
471 _ Programmable setup and hold times
472 _ Easy to use event management
473 _ Optional clock stretching
476 config SYS_I2C_SYNQUACER
477 bool "Socionext SynQuacer I2C controller"
478 depends on ARCH_SYNQUACER && DM_I2C
480 Support for Socionext Synquacer I2C controller. This I2C controller
481 will be used for RTC and LS-connector on DeveloperBox.
484 bool "NVIDIA Tegra internal I2C controller"
485 depends on ARCH_TEGRA
487 Support for NVIDIA I2C controller available in Tegra SoCs.
489 config SYS_I2C_UNIPHIER
490 bool "UniPhier I2C driver"
491 depends on ARCH_UNIPHIER && DM_I2C
494 Support for UniPhier I2C controller driver. This I2C controller
495 is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
497 config SYS_I2C_UNIPHIER_F
498 bool "UniPhier FIFO-builtin I2C driver"
499 depends on ARCH_UNIPHIER && DM_I2C
502 Support for UniPhier FIFO-builtin I2C controller driver.
503 This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
505 config SYS_I2C_VERSATILE
506 bool "Arm Ltd Versatile I2C bus driver"
507 depends on DM_I2C && TARGET_VEXPRESS64_JUNO
509 Add support for the Arm Ltd Versatile Express I2C driver. The I2C host
510 controller is present in the development boards manufactured by Arm Ltd.
512 config SYS_I2C_MVTWSI
513 bool "Marvell I2C driver"
516 Support for Marvell I2C controllers as used on the orion5x and
517 kirkwood SoC families.
519 config TEGRA186_BPMP_I2C
520 bool "Enable Tegra186 BPMP-based I2C driver"
521 depends on TEGRA186_BPMP
523 Support for Tegra I2C controllers managed by the BPMP (Boot and
524 Power Management Processor). On Tegra186, some I2C controllers are
525 directly controlled by the main CPU, whereas others are controlled
526 by the BPMP, and can only be accessed by the main CPU via IPC
527 requests to the BPMP. This driver covers the latter case.
529 config SYS_I2C_BUS_MAX
531 depends on ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_SOCFPGA
533 default 3 if OMAP34XX || AM33XX || AM43XX || ARCH_KEYSTONE
534 default 4 if ARCH_SOCFPGA || OMAP44XX || TI814X
535 default 5 if OMAP54XX
537 Define the maximum number of available I2C buses.
539 config SYS_I2C_XILINX_XIIC
540 bool "Xilinx AXI I2C driver"
543 Support for Xilinx AXI I2C controller.
546 bool "gdsys IHS I2C driver"
549 Support for gdsys IHS I2C driver on FPGA bus.
551 source "drivers/i2c/muxes/Kconfig"