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.
164 # These settings are not used with DM_I2C, however SPL doesn't use
165 # DM_I2C even if DM_I2C is enabled, and so might use these settings even
166 # when main u-boot does not!
167 if SYS_I2C_MXC && (!DM_I2C || SPL)
168 config SYS_I2C_MXC_I2C1
171 Add support for NXP MXC I2C Controller 1.
172 Required for SoCs which have I2C MXC controller 1 eg LS1088A, LS2080A
174 config SYS_I2C_MXC_I2C2
177 Add support for NXP MXC I2C Controller 2.
178 Required for SoCs which have I2C MXC controller 2 eg LS1088A, LS2080A
180 config SYS_I2C_MXC_I2C3
183 Add support for NXP MXC I2C Controller 3.
184 Required for SoCs which have I2C MXC controller 3 eg LS1088A, LS2080A
186 config SYS_I2C_MXC_I2C4
189 Add support for NXP MXC I2C Controller 4.
190 Required for SoCs which have I2C MXC controller 4 eg LS1088A, LS2080A
192 config SYS_I2C_MXC_I2C5
195 Add support for NXP MXC I2C Controller 5.
196 Required for SoCs which have I2C MXC controller 5 eg LX2160A
198 config SYS_I2C_MXC_I2C6
201 Add support for NXP MXC I2C Controller 6.
202 Required for SoCs which have I2C MXC controller 6 eg LX2160A
204 config SYS_I2C_MXC_I2C7
207 Add support for NXP MXC I2C Controller 7.
208 Required for SoCs which have I2C MXC controller 7 eg LX2160A
210 config SYS_I2C_MXC_I2C8
213 Add support for NXP MXC I2C Controller 8.
214 Required for SoCs which have I2C MXC controller 8 eg LX2160A
218 config SYS_MXC_I2C1_SPEED
219 int "I2C Channel 1 speed"
220 default 40000000 if TARGET_LS2080A_SIMU || TARGET_LS2080A_EMU
223 MXC I2C Channel 1 speed
225 config SYS_MXC_I2C1_SLAVE
233 config SYS_MXC_I2C2_SPEED
234 int "I2C Channel 2 speed"
235 default 40000000 if TARGET_LS2080A_SIMU || TARGET_LS2080A_EMU
238 MXC I2C Channel 2 speed
240 config SYS_MXC_I2C2_SLAVE
248 config SYS_MXC_I2C3_SPEED
249 int "I2C Channel 3 speed"
252 MXC I2C Channel 3 speed
254 config SYS_MXC_I2C3_SLAVE
262 config SYS_MXC_I2C4_SPEED
263 int "I2C Channel 4 speed"
266 MXC I2C Channel 4 speed
268 config SYS_MXC_I2C4_SLAVE
276 config SYS_MXC_I2C5_SPEED
277 int "I2C Channel 5 speed"
280 MXC I2C Channel 5 speed
282 config SYS_MXC_I2C5_SLAVE
290 config SYS_MXC_I2C6_SPEED
291 int "I2C Channel 6 speed"
294 MXC I2C Channel 6 speed
296 config SYS_MXC_I2C6_SLAVE
304 config SYS_MXC_I2C7_SPEED
305 int "I2C Channel 7 speed"
308 MXC I2C Channel 7 speed
310 config SYS_MXC_I2C7_SLAVE
318 config SYS_MXC_I2C8_SPEED
319 int "I2C Channel 8 speed"
322 MXC I2C Channel 8 speed
324 config SYS_MXC_I2C8_SLAVE
331 config SYS_I2C_OMAP24XX
332 bool "TI OMAP2+ I2C driver"
333 depends on ARCH_OMAP2PLUS
335 Add support for the OMAP2+ I2C driver.
338 config SYS_OMAP24_I2C_SLAVE
339 int "I2C Slave addr channel 0"
342 OMAP24xx I2C Slave address channel 0
344 config SYS_OMAP24_I2C_SPEED
345 int "I2C Slave channel 0 speed"
348 OMAP24xx Slave speed channel 0
351 config SYS_I2C_RCAR_I2C
352 bool "Renesas RCar I2C driver"
353 depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
355 Support for Renesas RCar I2C controller.
357 config SYS_I2C_RCAR_IIC
358 bool "Renesas RCar Gen3 IIC driver"
359 depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
361 Support for Renesas RCar Gen3 IIC controller.
363 config SYS_I2C_ROCKCHIP
364 bool "Rockchip I2C driver"
367 Add support for the Rockchip I2C driver. This is used with various
368 Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips
369 have several I2C ports and all are provided, controlled by the
372 config SYS_I2C_SANDBOX
373 bool "Sandbox I2C driver"
374 depends on SANDBOX && DM_I2C
376 Enable I2C support for sandbox. This is an emulation of a real I2C
377 bus. Devices can be attached to the bus using the device tree
378 which specifies the driver to use. See sandbox.dts as an example.
380 config SYS_I2C_S3C24X0
381 bool "Samsung I2C driver"
382 depends on ARCH_EXYNOS4 && DM_I2C
384 Support for Samsung I2C controller as Samsung SoCs.
386 config SYS_I2C_STM32F7
387 bool "STMicroelectronics STM32F7 I2C support"
388 depends on (STM32F7 || STM32H7 || ARCH_STM32MP) && DM_I2C
390 Enable this option to add support for STM32 I2C controller
391 introduced with STM32F7/H7 SoCs. This I2C controller supports :
392 _ Slave and master modes
393 _ Multimaster capability
394 _ Standard-mode (up to 100 kHz)
395 _ Fast-mode (up to 400 kHz)
396 _ Fast-mode Plus (up to 1 MHz)
397 _ 7-bit and 10-bit addressing mode
398 _ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)
399 _ All 7-bit addresses acknowledge mode
401 _ Programmable setup and hold times
402 _ Easy to use event management
403 _ Optional clock stretching
407 bool "NVIDIA Tegra internal I2C controller"
410 Support for NVIDIA I2C controller available in Tegra SoCs.
412 config SYS_I2C_UNIPHIER
413 bool "UniPhier I2C driver"
414 depends on ARCH_UNIPHIER && DM_I2C
417 Support for UniPhier I2C controller driver. This I2C controller
418 is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
420 config SYS_I2C_UNIPHIER_F
421 bool "UniPhier FIFO-builtin I2C driver"
422 depends on ARCH_UNIPHIER && DM_I2C
425 Support for UniPhier FIFO-builtin I2C controller driver.
426 This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
428 config SYS_I2C_VERSATILE
429 bool "Arm Ltd Versatile I2C bus driver"
430 depends on DM_I2C && (TARGET_VEXPRESS_CA15_TC2 || TARGET_VEXPRESS64_JUNO)
432 Add support for the Arm Ltd Versatile Express I2C driver. The I2C host
433 controller is present in the development boards manufactured by Arm Ltd.
435 config SYS_I2C_MVTWSI
436 bool "Marvell I2C driver"
439 Support for Marvell I2C controllers as used on the orion5x and
440 kirkwood SoC families.
442 config TEGRA186_BPMP_I2C
443 bool "Enable Tegra186 BPMP-based I2C driver"
444 depends on TEGRA186_BPMP
446 Support for Tegra I2C controllers managed by the BPMP (Boot and
447 Power Management Processor). On Tegra186, some I2C controllers are
448 directly controlled by the main CPU, whereas others are controlled
449 by the BPMP, and can only be accessed by the main CPU via IPC
450 requests to the BPMP. This driver covers the latter case.
452 config SYS_I2C_BUS_MAX
454 depends on ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_SOCFPGA
456 default 3 if OMAP34XX || AM33XX || AM43XX || ARCH_KEYSTONE
457 default 4 if ARCH_SOCFPGA || OMAP44XX || TI814X
458 default 5 if OMAP54XX
460 Define the maximum number of available I2C buses.
462 config SYS_I2C_XILINX_XIIC
463 bool "Xilinx AXI I2C driver"
466 Support for Xilinx AXI I2C controller.
469 bool "gdsys IHS I2C driver"
472 Support for gdsys IHS I2C driver on FPGA bus.
474 source "drivers/i2c/muxes/Kconfig"