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 Driver Model for I2C drivers in TPL"
52 depends on TPL_DM && DM_I2C
54 Enable driver model for I2C. The I2C uclass interface: probe, read,
55 write and speed, is implemented with the bus drivers operations,
56 which provide methods for bus setting and data transfer. Each chip
57 device (bus child) info is kept as parent platdata. The interface
58 is defined in include/i2c.h.
61 bool "Enable Driver Model for I2C drivers in VPL"
62 depends on VPL_DM && DM_I2C
65 Enable driver model for I2C. The I2C uclass interface: probe, read,
66 write and speed, is implemented with the bus drivers operations,
67 which provide methods for bus setting and data transfer. Each chip
68 device (bus child) info is kept as parent platdata. The interface
69 is defined in include/i2c.h.
72 bool "Enable legacy I2C subsystem and drivers"
75 Enable the legacy I2C subsystem and drivers. While this is
76 deprecated in U-Boot itself, this can be useful in some situations
79 config SPL_SYS_I2C_LEGACY
80 bool "Enable legacy I2C subsystem and drivers in SPL"
81 depends on SUPPORT_SPL && !SPL_DM_I2C
83 Enable the legacy I2C subsystem and drivers in SPL. This is useful
84 in some size constrained situations.
86 config TPL_SYS_I2C_LEGACY
87 bool "Enable legacy I2C subsystem and drivers in TPL"
88 depends on SUPPORT_TPL && !SPL_DM_I2C
90 Enable the legacy I2C subsystem and drivers in TPL. This is useful
91 in some size constrained situations.
93 config SYS_I2C_EARLY_INIT
94 bool "Enable legacy I2C subsystem early in boot"
95 depends on BOARD_EARLY_INIT_F && SPL_SYS_I2C_LEGACY && SYS_I2C_MXC
97 Add the function prototype for i2c_early_init_f which is called in
100 config I2C_CROS_EC_TUNNEL
101 tristate "Chrome OS EC tunnel I2C bus"
104 This provides an I2C bus that will tunnel i2c commands through to
105 the other side of the Chrome OS EC to the I2C bus connected there.
106 This will work whatever the interface used to talk to the EC (SPI,
107 I2C or LPC). Some Chromebooks use this when the hardware design
108 does not allow direct access to the main PMIC from the AP.
110 config I2C_CROS_EC_LDO
111 bool "Provide access to LDOs on the Chrome OS EC"
114 On many Chromebooks the main PMIC is inaccessible to the AP. This is
115 often dealt with by using an I2C pass-through interface provided by
116 the EC. On some unfortunate models (e.g. Spring) the pass-through
117 is not available, and an LDO message is available instead. This
118 option enables a driver which provides very basic access to those
119 regulators, via the EC. We implement this as an I2C bus which
120 emulates just the TPS65090 messages we know about. This is done to
121 avoid duplicating the logic in the TPS65090 regulator driver for
122 enabling/disabling an LDO.
124 config I2C_SET_DEFAULT_BUS_NUM
125 bool "Set default I2C bus number"
128 Set default number of I2C bus to be accessed. This option provides
129 behaviour similar to old (i.e. pre DM) I2C bus driver.
131 config I2C_DEFAULT_BUS_NUMBER
132 hex "I2C default bus number"
133 depends on I2C_SET_DEFAULT_BUS_NUM
136 Number of default I2C bus to use
139 bool "Enable Driver Model for software emulated I2C bus driver"
140 depends on DM_I2C && DM_GPIO
142 Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
143 configuration is given by the device tree. Kernel-style device tree
144 bindings are supported.
145 Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
147 config SPL_DM_I2C_GPIO
148 bool "Enable Driver Model for software emulated I2C bus driver in SPL"
149 depends on SPL_DM && DM_I2C_GPIO && SPL_DM_GPIO && SPL_GPIO
152 Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
153 configuration is given by the device tree. Kernel-style device tree
154 bindings are supported.
155 Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
158 bool "Atmel I2C driver"
159 depends on DM_I2C && ARCH_AT91
161 Add support for the Atmel I2C driver. A serious problem is that there
162 is no documented way to issue repeated START conditions for more than
163 two messages, as needed to support combined I2C messages. Use the
164 i2c-gpio driver unless your system can cope with this limitation.
165 Binding info: doc/device-tree-bindings/i2c/i2c-at91.txt
168 bool "Broadcom I2C driver"
172 Add support for Broadcom I2C driver.
173 Say yes here to to enable the Broadco I2C driver.
176 bool "Freescale I2C bus driver"
178 Add support for Freescale I2C busses as used on MPC8240, MPC8245, and
181 if SYS_I2C_FSL && (SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY)
182 config SYS_FSL_I2C_OFFSET
183 hex "Offset from the IMMR of the address of the first I2C controller"
185 config SYS_FSL_HAS_I2C2_OFFSET
186 bool "Support a second I2C controller"
188 config SYS_FSL_I2C2_OFFSET
189 hex "Offset from the IMMR of the address of the second I2C controller"
190 depends on SYS_FSL_HAS_I2C2_OFFSET
192 config SYS_FSL_HAS_I2C3_OFFSET
193 bool "Support a third I2C controller"
195 config SYS_FSL_I2C3_OFFSET
196 hex "Offset from the IMMR of the address of the third I2C controller"
197 depends on SYS_FSL_HAS_I2C3_OFFSET
199 config SYS_FSL_HAS_I2C4_OFFSET
200 bool "Support a fourth I2C controller"
202 config SYS_FSL_I2C4_OFFSET
203 hex "Offset from the IMMR of the address of the fourth I2C controller"
204 depends on SYS_FSL_HAS_I2C4_OFFSET
207 config SYS_I2C_CADENCE
208 tristate "Cadence I2C Controller"
211 Say yes here to select Cadence I2C Host Controller. This controller is
212 e.g. used by Xilinx Zynq.
215 tristate "Cortina-Access I2C Controller"
216 depends on DM_I2C && CORTINA_PLATFORM
218 Add support for the Cortina Access I2C host controller.
219 Say yes here to select Cortina-Access I2C Host Controller.
221 config SYS_I2C_DAVINCI
222 bool "Davinci I2C Controller"
223 depends on (ARCH_KEYSTONE || ARCH_DAVINCI)
225 Say yes here to add support for Davinci and Keystone I2C controller
228 bool "Designware I2C Controller"
230 Say yes here to select the Designware I2C Host Controller. This
231 controller is used in various SoCs, e.g. the ST SPEAr, Altera
232 SoCFPGA, Synopsys ARC700 and some Intel x86 SoCs.
234 config SYS_I2C_DW_PCI
235 bool "Designware PCI I2C Controller"
236 depends on SYS_I2C_DW && PCI && ACPIGEN
239 Say yes here to select the Designware PCI I2C Host Controller.
240 This PCI I2C controller is the base on Desigware I2C host
243 config SYS_I2C_AST2600
244 bool "AST2600 I2C Controller"
245 depends on DM_I2C && ARCH_ASPEED
247 Say yes here to select AST2600 I2C Host Controller. The driver
248 support AST2600 I2C new mode register. This I2C controller supports:
249 _Standard-mode (up to 100 kHz)
250 _Fast-mode (up to 400 kHz)
251 _Fast-mode Plus (up to 1 MHz)
253 config SYS_I2C_ASPEED
254 bool "Aspeed I2C Controller"
255 depends on DM_I2C && ARCH_ASPEED
257 Say yes here to select Aspeed I2C Host Controller. The driver
258 supports AST2500 and AST2400 controllers, but is very limited.
259 Only single master mode is supported and only byte-by-byte
260 synchronous reads and writes are supported, no Pool Buffers or DMA.
263 bool "Intel I2C/SMBUS driver"
266 Add support for the Intel SMBUS driver. So far this driver is just
267 a stub which perhaps some basic init. There is no implementation of
268 the I2C API meaning that any I2C operations will immediately fail
271 config SYS_I2C_IMX_LPI2C
272 bool "NXP i.MX LPI2C driver"
274 Add support for the NXP i.MX LPI2C driver.
276 config SYS_I2C_LPC32XX
277 bool "LPC32XX I2C driver"
278 depends on ARCH_LPC32XX
280 Enable support for the LPC32xx I2C driver.
283 bool "Amlogic Meson I2C driver"
284 depends on DM_I2C && ARCH_MESON
286 Add support for the I2C controller available in Amlogic Meson
287 SoCs. The controller supports programmable bus speed including
288 standard (100kbits/s) and fast (400kbit/s) speed and allows the
289 software to define a flexible format of the bit streams. It has an
290 internal buffer holding up to 8 bytes for transfers and supports
291 both 7-bit and 10-bit addresses.
294 bool "MediaTek I2C driver"
296 This selects the MediaTek Integrated Inter Circuit bus driver.
297 The I2C bus adapter is the base for some other I2C client,
299 If you want to use MediaTek I2C interface, say Y here.
302 config SYS_I2C_MICROCHIP
303 bool "Microchip I2C driver"
305 Add support for the Microchip I2C driver. This is operating on
306 standard mode up to 100 kbits/s and fast mode up to 400 kbits/s.
309 bool "NXP MXC I2C driver"
311 Add support for the NXP I2C driver. This supports up to four bus
312 channels and operating on standard mode up to 100 kbits/s and fast
313 mode up to 400 kbits/s.
315 if SYS_I2C_MXC && (SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY)
316 config SYS_I2C_MXC_I2C1
319 Add support for NXP MXC I2C Controller 1.
320 Required for SoCs which have I2C MXC controller 1 eg LS1088A, LS2080A
322 config SYS_I2C_MXC_I2C2
325 Add support for NXP MXC I2C Controller 2.
326 Required for SoCs which have I2C MXC controller 2 eg LS1088A, LS2080A
328 config SYS_I2C_MXC_I2C3
331 Add support for NXP MXC I2C Controller 3.
332 Required for SoCs which have I2C MXC controller 3 eg LS1088A, LS2080A
334 config SYS_I2C_MXC_I2C4
337 Add support for NXP MXC I2C Controller 4.
338 Required for SoCs which have I2C MXC controller 4 eg LS1088A, LS2080A
340 config SYS_I2C_MXC_I2C5
343 Add support for NXP MXC I2C Controller 5.
344 Required for SoCs which have I2C MXC controller 5 eg LX2160A
346 config SYS_I2C_MXC_I2C6
349 Add support for NXP MXC I2C Controller 6.
350 Required for SoCs which have I2C MXC controller 6 eg LX2160A
352 config SYS_I2C_MXC_I2C7
355 Add support for NXP MXC I2C Controller 7.
356 Required for SoCs which have I2C MXC controller 7 eg LX2160A
358 config SYS_I2C_MXC_I2C8
361 Add support for NXP MXC I2C Controller 8.
362 Required for SoCs which have I2C MXC controller 8 eg LX2160A
366 config SYS_MXC_I2C1_SPEED
367 int "I2C Channel 1 speed"
368 default 40000000 if TARGET_LS2080A_EMU
371 MXC I2C Channel 1 speed
373 config SYS_MXC_I2C1_SLAVE
381 config SYS_MXC_I2C2_SPEED
382 int "I2C Channel 2 speed"
383 default 40000000 if TARGET_LS2080A_EMU
386 MXC I2C Channel 2 speed
388 config SYS_MXC_I2C2_SLAVE
396 config SYS_MXC_I2C3_SPEED
397 int "I2C Channel 3 speed"
400 MXC I2C Channel 3 speed
402 config SYS_MXC_I2C3_SLAVE
410 config SYS_MXC_I2C4_SPEED
411 int "I2C Channel 4 speed"
414 MXC I2C Channel 4 speed
416 config SYS_MXC_I2C4_SLAVE
424 config SYS_MXC_I2C5_SPEED
425 int "I2C Channel 5 speed"
428 MXC I2C Channel 5 speed
430 config SYS_MXC_I2C5_SLAVE
438 config SYS_MXC_I2C6_SPEED
439 int "I2C Channel 6 speed"
442 MXC I2C Channel 6 speed
444 config SYS_MXC_I2C6_SLAVE
452 config SYS_MXC_I2C7_SPEED
453 int "I2C Channel 7 speed"
456 MXC I2C Channel 7 speed
458 config SYS_MXC_I2C7_SLAVE
466 config SYS_MXC_I2C8_SPEED
467 int "I2C Channel 8 speed"
470 MXC I2C Channel 8 speed
472 config SYS_MXC_I2C8_SLAVE
479 config SYS_I2C_NEXELL
480 bool "Nexell I2C driver"
483 Add support for the Nexell I2C driver. This is used with various
484 Nexell parts such as S5Pxx18 series SoCs. All chips
485 have several I2C ports and all are provided, controlled by the
489 bool "Nuvoton NPCM I2C driver"
491 Support for Nuvoton I2C controller driver.
493 config SYS_I2C_OCORES
494 bool "ocores I2C driver"
497 Add support for ocores I2C controller. For details see
498 https://opencores.org/projects/i2c
500 config SYS_I2C_OMAP24XX
501 bool "TI OMAP2+ I2C driver"
502 depends on ARCH_OMAP2PLUS || ARCH_K3
504 Add support for the OMAP2+ I2C driver.
506 config SYS_I2C_RCAR_I2C
507 bool "Renesas RCar I2C driver"
508 depends on (RCAR_GEN2 || RCAR_64) && DM_I2C
510 Support for Renesas RCar I2C controller.
512 config SYS_I2C_RCAR_IIC
513 bool "Renesas RCar Gen3 IIC driver"
514 depends on (RCAR_GEN2 || RCAR_GEN3) && DM_I2C
516 Support for Renesas RCar Gen3 IIC controller.
518 config SYS_I2C_ROCKCHIP
519 bool "Rockchip I2C driver"
522 Add support for the Rockchip I2C driver. This is used with various
523 Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips
524 have several I2C ports and all are provided, controlled by the
527 config SYS_I2C_RZ_RIIC
528 bool "Renesas RZ/G2L RIIC driver"
529 depends on RZG2L && DM_I2C
531 Support for the I2C controller (RIIC) on the Renesas RZ/G2L SoC
534 config SYS_I2C_SANDBOX
535 bool "Sandbox I2C driver"
536 depends on SANDBOX && DM_I2C
539 Enable I2C support for sandbox. This is an emulation of a real I2C
540 bus. Devices can be attached to the bus using the device tree
541 which specifies the driver to use. See sandbox.dts as an example.
543 config SPL_SYS_I2C_SANDBOX
544 bool "Sandbox I2C driver (SPL)"
545 depends on SPL && SANDBOX && DM_I2C
548 Enable I2C support for sandbox. This is an emulation of a real I2C
549 bus. Devices can be attached to the bus using the device tree
550 which specifies the driver to use. See sandbox.dts as an example.
553 bool "Legacy SuperH I2C interface"
554 depends on ARCH_RENESAS && SYS_I2C_LEGACY
556 Enable the legacy SuperH I2C interface.
559 config SYS_I2C_SH_NUM_CONTROLLERS
563 config SYS_I2C_SH_BASE0
567 config SYS_I2C_SH_BASE1
571 config SYS_I2C_SH_BASE2
575 config SYS_I2C_SH_BASE3
579 config SYS_I2C_SH_BASE4
587 config SH_I2C_DATA_HIGH
591 config SH_I2C_DATA_LOW
601 bool "Legacy software I2C interface"
603 Enable the legacy software defined I2C interface
605 config SYS_I2C_SOFT_SPEED
606 int "Software I2C bus speed"
607 depends on SYS_I2C_SOFT
610 Speed of the software I2C bus
612 config SYS_I2C_SOFT_SLAVE
613 hex "Software I2C slave address"
614 depends on SYS_I2C_SOFT
617 Slave address of the software I2C bus
619 config SYS_I2C_OCTEON
620 bool "Octeon II/III/TX/TX2 I2C driver"
621 depends on (ARCH_OCTEON || ARCH_OCTEONTX || ARCH_OCTEONTX2) && DM_I2C
624 Add support for the Marvell Octeon I2C driver. This is used with
625 various Octeon parts such as Octeon II/III and OcteonTX/TX2. All
626 chips have several I2C ports and all are provided, controlled by
630 bool "Qualcomm QUP I2C controller"
631 depends on ARCH_SNAPDRAGON
633 Support for Qualcomm QUP I2C controller based on Qualcomm Universal
634 Peripherals (QUP) engine. The QUP engine is an advanced high
635 performance slave port that provides a common data path (an output
636 FIFO and an input FIFO) for I2C and SPI interfaces. The I2C/SPI QUP
637 controller is publicly documented in the Snapdragon 410E (APQ8016E)
638 Technical Reference Manual, chapter "6.1 Qualcomm Universal
639 Peripherals Engine (QUP)".
642 bool "Qualcomm Generic Interface (GENI) I2C controller"
643 depends on ARCH_SNAPDRAGON
645 Support for the Qualcomm Generic Interface (GENI) I2C interface.
646 The Generic Interface (GENI) is a firmware based Qualcomm Universal
647 Peripherals (QUP) Serial Engine (SE) Wrapper which can support multiple
648 bus protocols depending on the firmware type loaded at early boot time
649 based on system configuration.
651 config SYS_I2C_S3C24X0
652 bool "Samsung I2C driver"
655 Support for Samsung I2C controller as Samsung SoCs.
657 config SYS_I2C_STM32F7
658 bool "STMicroelectronics STM32F7 I2C support"
659 depends on (STM32F7 || STM32H7 || ARCH_STM32MP) && DM_I2C
661 Enable this option to add support for STM32 I2C controller
662 introduced with STM32F7/H7 SoCs. This I2C controller supports :
663 _ Slave and master modes
664 _ Multimaster capability
665 _ Standard-mode (up to 100 kHz)
666 _ Fast-mode (up to 400 kHz)
667 _ Fast-mode Plus (up to 1 MHz)
668 _ 7-bit and 10-bit addressing mode
669 _ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)
670 _ All 7-bit addresses acknowledge mode
672 _ Programmable setup and hold times
673 _ Easy to use event management
674 _ Optional clock stretching
677 config SYS_I2C_SUN6I_P2WI
678 bool "Allwinner sun6i P2WI controller"
679 depends on ARCH_SUNXI
681 Support for the P2WI (Push/Pull 2 Wire Interface) controller embedded
682 in the Allwinner A31 and A31s SOCs. This interface is used to connect
683 to specific devices like the X-Powers AXP221 PMIC.
685 config SYS_I2C_SUN8I_RSB
686 bool "Allwinner sun8i Reduced Serial Bus controller"
687 depends on ARCH_SUNXI
689 Support for Allwinner's Reduced Serial Bus (RSB) controller. This
690 controller is responsible for communicating with various RSB based
691 devices, such as X-Powers AXPxxx PMICs and AC100/AC200 CODEC ICs.
693 config SYS_I2C_SYNQUACER
694 bool "Socionext SynQuacer I2C controller"
695 depends on ARCH_SYNQUACER && DM_I2C
697 Support for Socionext Synquacer I2C controller. This I2C controller
698 will be used for RTC and LS-connector on DeveloperBox.
701 bool "NVIDIA Tegra internal I2C controller"
702 depends on ARCH_TEGRA
704 Support for NVIDIA I2C controller available in Tegra SoCs.
706 config SYS_I2C_UNIPHIER
707 bool "UniPhier I2C driver"
708 depends on ARCH_UNIPHIER && DM_I2C
711 Support for UniPhier I2C controller driver. This I2C controller
712 is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
714 config SYS_I2C_UNIPHIER_F
715 bool "UniPhier FIFO-builtin I2C driver"
716 depends on ARCH_UNIPHIER && DM_I2C
719 Support for UniPhier FIFO-builtin I2C controller driver.
720 This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
722 config SYS_I2C_VERSATILE
723 bool "Arm Ltd Versatile I2C bus driver"
724 depends on DM_I2C && TARGET_VEXPRESS64_JUNO
726 Add support for the Arm Ltd Versatile Express I2C driver. The I2C host
727 controller is present in the development boards manufactured by Arm Ltd.
730 bool "Marvell PXA (Armada 3720) I2C driver"
732 Support for PXA based I2C controller used on Armada 3720 SoC.
733 In Linux, this driver is called i2c-pxa.
735 config SYS_I2C_MVTWSI
736 bool "Marvell I2C driver"
738 Support for Marvell I2C controllers as used on the orion5x and
739 kirkwood SoC families.
741 config TEGRA186_BPMP_I2C
742 bool "Enable Tegra186 BPMP-based I2C driver"
743 depends on TEGRA186_BPMP
745 Support for Tegra I2C controllers managed by the BPMP (Boot and
746 Power Management Processor). On Tegra186, some I2C controllers are
747 directly controlled by the main CPU, whereas others are controlled
748 by the BPMP, and can only be accessed by the main CPU via IPC
749 requests to the BPMP. This driver covers the latter case.
752 hex "I2C Slave address channel (all buses)"
753 depends on SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY || TPL_SYS_I2C_LEGACY
756 I2C Slave address channel 0 for all buses in the legacy drivers.
757 Many boards/controllers/drivers don't support an I2C slave
758 interface so provide a default slave address for them for use in
759 common code. A real value for CONFIG_SYS_I2C_SLAVE should be
760 defined for any board which does support a slave interface and
761 this default used otherwise.
764 int "I2C Slave channel 0 speed (all buses)"
765 depends on SYS_I2C_LEGACY || SPL_SYS_I2C_LEGACY || TPL_SYS_I2C_LEGACY
768 I2C Slave speed channel 0 for all buses in the legacy drivers.
770 config SYS_I2C_BUS_MAX
772 depends on ARCH_OMAP2PLUS || ARCH_SOCFPGA
773 default 3 if OMAP34XX || AM33XX || AM43XX
774 default 4 if ARCH_SOCFPGA
775 default 5 if OMAP54XX
777 Define the maximum number of available I2C buses.
779 config SYS_I2C_XILINX_XIIC
780 bool "Xilinx AXI I2C driver"
783 Support for Xilinx AXI I2C controller.
786 bool "gdsys IHS I2C driver"
789 Support for gdsys IHS I2C driver on FPGA bus.
791 source "drivers/i2c/muxes/Kconfig"