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.
51 bool "Enable legacy I2C subsystem and drivers"
54 Enable the legacy I2C subsystem and drivers. While this is
55 deprecated in U-Boot itself, this can be useful in some situations
58 config SPL_SYS_I2C_LEGACY
59 bool "Enable legacy I2C subsystem and drivers in SPL"
60 depends on SUPPORT_SPL && !SPL_DM_I2C
62 Enable the legacy I2C subsystem and drivers in SPL. This is useful
63 in some size constrained situations.
65 config TPL_SYS_I2C_LEGACY
66 bool "Enable legacy I2C subsystem and drivers in TPL"
67 depends on SUPPORT_TPL && !SPL_DM_I2C
69 Enable the legacy I2C subsystem and drivers in TPL. This is useful
70 in some size constrained situations.
72 config SYS_I2C_EARLY_INIT
73 bool "Enable legacy I2C subsystem early in boot"
74 depends on BOARD_EARLY_INIT_F && SPL_SYS_I2C_LEGACY && SYS_I2C_MXC
76 Add the function prototype for i2c_early_init_f which is called in
79 config I2C_CROS_EC_TUNNEL
80 tristate "Chrome OS EC tunnel I2C bus"
83 This provides an I2C bus that will tunnel i2c commands through to
84 the other side of the Chrome OS EC to the I2C bus connected there.
85 This will work whatever the interface used to talk to the EC (SPI,
86 I2C or LPC). Some Chromebooks use this when the hardware design
87 does not allow direct access to the main PMIC from the AP.
89 config I2C_CROS_EC_LDO
90 bool "Provide access to LDOs on the Chrome OS EC"
93 On many Chromebooks the main PMIC is inaccessible to the AP. This is
94 often dealt with by using an I2C pass-through interface provided by
95 the EC. On some unfortunate models (e.g. Spring) the pass-through
96 is not available, and an LDO message is available instead. This
97 option enables a driver which provides very basic access to those
98 regulators, via the EC. We implement this as an I2C bus which
99 emulates just the TPS65090 messages we know about. This is done to
100 avoid duplicating the logic in the TPS65090 regulator driver for
101 enabling/disabling an LDO.
103 config I2C_SET_DEFAULT_BUS_NUM
104 bool "Set default I2C bus number"
107 Set default number of I2C bus to be accessed. This option provides
108 behaviour similar to old (i.e. pre DM) I2C bus driver.
110 config I2C_DEFAULT_BUS_NUMBER
111 hex "I2C default bus number"
112 depends on I2C_SET_DEFAULT_BUS_NUM
115 Number of default I2C bus to use
118 bool "Enable Driver Model for software emulated I2C bus driver"
119 depends on DM_I2C && DM_GPIO
121 Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
122 configuration is given by the device tree. Kernel-style device tree
123 bindings are supported.
124 Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
126 config SPL_DM_I2C_GPIO
127 bool "Enable Driver Model for software emulated I2C bus driver in SPL"
128 depends on SPL_DM && DM_I2C_GPIO && SPL_DM_GPIO && SPL_GPIO
131 Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
132 configuration is given by the device tree. Kernel-style device tree
133 bindings are supported.
134 Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
137 bool "Atmel I2C driver"
138 depends on DM_I2C && ARCH_AT91
140 Add support for the Atmel I2C driver. A serious problem is that there
141 is no documented way to issue repeated START conditions for more than
142 two messages, as needed to support combined I2C messages. Use the
143 i2c-gpio driver unless your system can cope with this limitation.
144 Binding info: doc/device-tree-bindings/i2c/i2c-at91.txt
147 bool "Broadcom I2C driver"
151 Add support for Broadcom I2C driver.
152 Say yes here to to enable the Broadco I2C driver.
155 bool "Freescale I2C bus driver"
158 Add support for Freescale I2C busses as used on MPC8240, MPC8245, and
161 config SYS_I2C_CADENCE
162 tristate "Cadence I2C Controller"
165 Say yes here to select Cadence I2C Host Controller. This controller is
166 e.g. used by Xilinx Zynq.
169 tristate "Cortina-Access I2C Controller"
170 depends on DM_I2C && CORTINA_PLATFORM
173 Add support for the Cortina Access I2C host controller.
174 Say yes here to select Cortina-Access I2C Host Controller.
176 config SYS_I2C_DAVINCI
177 bool "Davinci I2C Controller"
178 depends on (ARCH_KEYSTONE || ARCH_DAVINCI)
180 Say yes here to add support for Davinci and Keystone I2C controller
183 bool "Designware I2C Controller"
186 Say yes here to select the Designware I2C Host Controller. This
187 controller is used in various SoCs, e.g. the ST SPEAr, Altera
188 SoCFPGA, Synopsys ARC700 and some Intel x86 SoCs.
190 config SYS_I2C_ASPEED
191 bool "Aspeed I2C Controller"
192 depends on DM_I2C && ARCH_ASPEED
194 Say yes here to select Aspeed I2C Host Controller. The driver
195 supports AST2500 and AST2400 controllers, but is very limited.
196 Only single master mode is supported and only byte-by-byte
197 synchronous reads and writes are supported, no Pool Buffers or DMA.
200 bool "Intel I2C/SMBUS driver"
203 Add support for the Intel SMBUS driver. So far this driver is just
204 a stub which perhaps some basic init. There is no implementation of
205 the I2C API meaning that any I2C operations will immediately fail
208 config SYS_I2C_IMX_LPI2C
209 bool "NXP i.MX LPI2C driver"
211 Add support for the NXP i.MX LPI2C driver.
213 config SYS_I2C_LPC32XX
214 bool "LPC32XX I2C driver"
215 depends on ARCH_LPC32XX
217 Enable support for the LPC32xx I2C driver.
220 bool "Amlogic Meson I2C driver"
221 depends on DM_I2C && ARCH_MESON
223 Add support for the I2C controller available in Amlogic Meson
224 SoCs. The controller supports programmable bus speed including
225 standard (100kbits/s) and fast (400kbit/s) speed and allows the
226 software to define a flexible format of the bit streams. It has an
227 internal buffer holding up to 8 bytes for transfers and supports
228 both 7-bit and 10-bit addresses.
231 bool "NXP MXC I2C driver"
233 Add support for the NXP I2C driver. This supports up to four bus
234 channels and operating on standard mode up to 100 kbits/s and fast
235 mode up to 400 kbits/s.
237 if SYS_I2C_MXC && (SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY)
238 config SYS_I2C_MXC_I2C1
241 Add support for NXP MXC I2C Controller 1.
242 Required for SoCs which have I2C MXC controller 1 eg LS1088A, LS2080A
244 config SYS_I2C_MXC_I2C2
247 Add support for NXP MXC I2C Controller 2.
248 Required for SoCs which have I2C MXC controller 2 eg LS1088A, LS2080A
250 config SYS_I2C_MXC_I2C3
253 Add support for NXP MXC I2C Controller 3.
254 Required for SoCs which have I2C MXC controller 3 eg LS1088A, LS2080A
256 config SYS_I2C_MXC_I2C4
259 Add support for NXP MXC I2C Controller 4.
260 Required for SoCs which have I2C MXC controller 4 eg LS1088A, LS2080A
262 config SYS_I2C_MXC_I2C5
265 Add support for NXP MXC I2C Controller 5.
266 Required for SoCs which have I2C MXC controller 5 eg LX2160A
268 config SYS_I2C_MXC_I2C6
271 Add support for NXP MXC I2C Controller 6.
272 Required for SoCs which have I2C MXC controller 6 eg LX2160A
274 config SYS_I2C_MXC_I2C7
277 Add support for NXP MXC I2C Controller 7.
278 Required for SoCs which have I2C MXC controller 7 eg LX2160A
280 config SYS_I2C_MXC_I2C8
283 Add support for NXP MXC I2C Controller 8.
284 Required for SoCs which have I2C MXC controller 8 eg LX2160A
288 config SYS_MXC_I2C1_SPEED
289 int "I2C Channel 1 speed"
290 default 40000000 if TARGET_LS2080A_EMU
293 MXC I2C Channel 1 speed
295 config SYS_MXC_I2C1_SLAVE
303 config SYS_MXC_I2C2_SPEED
304 int "I2C Channel 2 speed"
305 default 40000000 if TARGET_LS2080A_EMU
308 MXC I2C Channel 2 speed
310 config SYS_MXC_I2C2_SLAVE
318 config SYS_MXC_I2C3_SPEED
319 int "I2C Channel 3 speed"
322 MXC I2C Channel 3 speed
324 config SYS_MXC_I2C3_SLAVE
332 config SYS_MXC_I2C4_SPEED
333 int "I2C Channel 4 speed"
336 MXC I2C Channel 4 speed
338 config SYS_MXC_I2C4_SLAVE
346 config SYS_MXC_I2C5_SPEED
347 int "I2C Channel 5 speed"
350 MXC I2C Channel 5 speed
352 config SYS_MXC_I2C5_SLAVE
360 config SYS_MXC_I2C6_SPEED
361 int "I2C Channel 6 speed"
364 MXC I2C Channel 6 speed
366 config SYS_MXC_I2C6_SLAVE
374 config SYS_MXC_I2C7_SPEED
375 int "I2C Channel 7 speed"
378 MXC I2C Channel 7 speed
380 config SYS_MXC_I2C7_SLAVE
388 config SYS_MXC_I2C8_SPEED
389 int "I2C Channel 8 speed"
392 MXC I2C Channel 8 speed
394 config SYS_MXC_I2C8_SLAVE
401 config SYS_I2C_NEXELL
402 bool "Nexell I2C driver"
405 Add support for the Nexell I2C driver. This is used with various
406 Nexell parts such as S5Pxx18 series SoCs. All chips
407 have several I2C ports and all are provided, controlled by the
410 config SYS_I2C_OCORES
411 bool "ocores I2C driver"
414 Add support for ocores I2C controller. For details see
415 https://opencores.org/projects/i2c
417 config SYS_I2C_OMAP24XX
418 bool "TI OMAP2+ I2C driver"
419 depends on ARCH_OMAP2PLUS || ARCH_K3
421 Add support for the OMAP2+ I2C driver.
423 config SYS_I2C_RCAR_I2C
424 bool "Renesas RCar I2C driver"
425 depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
427 Support for Renesas RCar I2C controller.
429 config SYS_I2C_RCAR_IIC
430 bool "Renesas RCar Gen3 IIC driver"
431 depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
433 Support for Renesas RCar Gen3 IIC controller.
435 config SYS_I2C_ROCKCHIP
436 bool "Rockchip I2C driver"
439 Add support for the Rockchip I2C driver. This is used with various
440 Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips
441 have several I2C ports and all are provided, controlled by the
444 config SYS_I2C_SANDBOX
445 bool "Sandbox I2C driver"
446 depends on SANDBOX && DM_I2C
448 Enable I2C support for sandbox. This is an emulation of a real I2C
449 bus. Devices can be attached to the bus using the device tree
450 which specifies the driver to use. See sandbox.dts as an example.
453 bool "Legacy SuperH I2C interface"
454 depends on ARCH_RMOBILE && SYS_I2C_LEGACY
456 Enable the legacy SuperH I2C interface.
459 config SYS_I2C_SH_NUM_CONTROLLERS
463 config SYS_I2C_SH_BASE0
467 config SYS_I2C_SH_BASE1
471 config SYS_I2C_SH_BASE2
475 config SYS_I2C_SH_BASE3
479 config SYS_I2C_SH_BASE4
487 config SH_I2C_DATA_HIGH
491 config SH_I2C_DATA_LOW
501 bool "Legacy software I2C interface"
503 Enable the legacy software defined I2C interface
505 config SYS_I2C_SOFT_SPEED
506 int "Software I2C bus speed"
507 depends on SYS_I2C_SOFT
510 Speed of the software I2C bus
512 config SYS_I2C_SOFT_SLAVE
513 hex "Software I2C slave address"
514 depends on SYS_I2C_SOFT
517 Slave address of the software I2C bus
519 config SYS_I2C_OCTEON
520 bool "Octeon II/III/TX/TX2 I2C driver"
521 depends on (ARCH_OCTEON || ARCH_OCTEONTX || ARCH_OCTEONTX2) && DM_I2C
524 Add support for the Marvell Octeon I2C driver. This is used with
525 various Octeon parts such as Octeon II/III and OcteonTX/TX2. All
526 chips have several I2C ports and all are provided, controlled by
529 config SYS_I2C_S3C24X0
530 bool "Samsung I2C driver"
531 depends on (ARCH_EXYNOS4 || ARCH_EXYNOS5) && DM_I2C
533 Support for Samsung I2C controller as Samsung SoCs.
535 config SYS_I2C_STM32F7
536 bool "STMicroelectronics STM32F7 I2C support"
537 depends on (STM32F7 || STM32H7 || ARCH_STM32MP) && DM_I2C
539 Enable this option to add support for STM32 I2C controller
540 introduced with STM32F7/H7 SoCs. This I2C controller supports :
541 _ Slave and master modes
542 _ Multimaster capability
543 _ Standard-mode (up to 100 kHz)
544 _ Fast-mode (up to 400 kHz)
545 _ Fast-mode Plus (up to 1 MHz)
546 _ 7-bit and 10-bit addressing mode
547 _ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)
548 _ All 7-bit addresses acknowledge mode
550 _ Programmable setup and hold times
551 _ Easy to use event management
552 _ Optional clock stretching
555 config SYS_I2C_SYNQUACER
556 bool "Socionext SynQuacer I2C controller"
557 depends on ARCH_SYNQUACER && DM_I2C
559 Support for Socionext Synquacer I2C controller. This I2C controller
560 will be used for RTC and LS-connector on DeveloperBox.
563 bool "NVIDIA Tegra internal I2C controller"
564 depends on ARCH_TEGRA
566 Support for NVIDIA I2C controller available in Tegra SoCs.
568 config SYS_I2C_UNIPHIER
569 bool "UniPhier I2C driver"
570 depends on ARCH_UNIPHIER && DM_I2C
573 Support for UniPhier I2C controller driver. This I2C controller
574 is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
576 config SYS_I2C_UNIPHIER_F
577 bool "UniPhier FIFO-builtin I2C driver"
578 depends on ARCH_UNIPHIER && DM_I2C
581 Support for UniPhier FIFO-builtin I2C controller driver.
582 This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
584 config SYS_I2C_VERSATILE
585 bool "Arm Ltd Versatile I2C bus driver"
586 depends on DM_I2C && TARGET_VEXPRESS64_JUNO
588 Add support for the Arm Ltd Versatile Express I2C driver. The I2C host
589 controller is present in the development boards manufactured by Arm Ltd.
591 config SYS_I2C_MVTWSI
592 bool "Marvell I2C driver"
594 Support for Marvell I2C controllers as used on the orion5x and
595 kirkwood SoC families.
597 config TEGRA186_BPMP_I2C
598 bool "Enable Tegra186 BPMP-based I2C driver"
599 depends on TEGRA186_BPMP
601 Support for Tegra I2C controllers managed by the BPMP (Boot and
602 Power Management Processor). On Tegra186, some I2C controllers are
603 directly controlled by the main CPU, whereas others are controlled
604 by the BPMP, and can only be accessed by the main CPU via IPC
605 requests to the BPMP. This driver covers the latter case.
608 hex "I2C Slave address channel (all buses)"
609 depends on SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY || TPL_SYS_I2C_LEGACY
612 I2C Slave address channel 0 for all buses in the legacy drivers.
613 Many boards/controllers/drivers don't support an I2C slave
614 interface so provide a default slave address for them for use in
615 common code. A real value for CONFIG_SYS_I2C_SLAVE should be
616 defined for any board which does support a slave interface and
617 this default used otherwise.
620 int "I2C Slave channel 0 speed (all buses)"
621 depends on SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY || TPL_SYS_I2C_LEGACY
624 I2C Slave speed channel 0 for all buses in the legacy drivers.
626 config SYS_I2C_BUS_MAX
628 depends on ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_SOCFPGA
630 default 3 if OMAP34XX || AM33XX || AM43XX || ARCH_KEYSTONE
631 default 4 if ARCH_SOCFPGA || OMAP44XX || TI814X
632 default 5 if OMAP54XX
634 Define the maximum number of available I2C buses.
636 config SYS_I2C_XILINX_XIIC
637 bool "Xilinx AXI I2C driver"
640 Support for Xilinx AXI I2C controller.
643 bool "gdsys IHS I2C driver"
646 Support for gdsys IHS I2C driver on FPGA bus.
648 source "drivers/i2c/muxes/Kconfig"