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.
17 config I2C_CROS_EC_TUNNEL
18 tristate "Chrome OS EC tunnel I2C bus"
21 This provides an I2C bus that will tunnel i2c commands through to
22 the other side of the Chrome OS EC to the I2C bus connected there.
23 This will work whatever the interface used to talk to the EC (SPI,
24 I2C or LPC). Some Chromebooks use this when the hardware design
25 does not allow direct access to the main PMIC from the AP.
27 config I2C_CROS_EC_LDO
28 bool "Provide access to LDOs on the Chrome OS EC"
31 On many Chromebooks the main PMIC is inaccessible to the AP. This is
32 often dealt with by using an I2C pass-through interface provided by
33 the EC. On some unfortunate models (e.g. Spring) the pass-through
34 is not available, and an LDO message is available instead. This
35 option enables a driver which provides very basic access to those
36 regulators, via the EC. We implement this as an I2C bus which
37 emulates just the TPS65090 messages we know about. This is done to
38 avoid duplicating the logic in the TPS65090 regulator driver for
39 enabling/disabling an LDO.
41 config I2C_SET_DEFAULT_BUS_NUM
42 bool "Set default I2C bus number"
45 Set default number of I2C bus to be accessed. This option provides
46 behaviour similar to old (i.e. pre DM) I2C bus driver.
48 config I2C_DEFAULT_BUS_NUMBER
49 hex "I2C default bus number"
50 depends on I2C_SET_DEFAULT_BUS_NUM
53 Number of default I2C bus to use
56 bool "Enable Driver Model for software emulated I2C bus driver"
57 depends on DM_I2C && DM_GPIO
59 Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
60 configuration is given by the device tree. Kernel-style device tree
61 bindings are supported.
62 Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
65 bool "Atmel I2C driver"
66 depends on DM_I2C && ARCH_AT91
68 Add support for the Atmel I2C driver. A serious problem is that there
69 is no documented way to issue repeated START conditions for more than
70 two messages, as needed to support combined I2C messages. Use the
71 i2c-gpio driver unless your system can cope with this limitation.
72 Binding info: doc/device-tree-bindings/i2c/i2c-at91.txt
75 bool "Freescale I2C bus driver"
78 Add support for Freescale I2C busses as used on MPC8240, MPC8245, and
81 config SYS_I2C_CADENCE
82 tristate "Cadence I2C Controller"
83 depends on DM_I2C && (ARCH_ZYNQ || ARM64)
85 Say yes here to select Cadence I2C Host Controller. This controller is
86 e.g. used by Xilinx Zynq.
88 config SYS_I2C_DAVINCI
89 bool "Davinci I2C Controller"
90 depends on (ARCH_KEYSTONE || ARCH_DAVINCI)
92 Say yes here to add support for Davinci and Keystone I2C controller
95 bool "Designware I2C Controller"
98 Say yes here to select the Designware I2C Host Controller. This
99 controller is used in various SoCs, e.g. the ST SPEAr, Altera
100 SoCFPGA, Synopsys ARC700 and some Intel x86 SoCs.
102 config SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED
103 bool "DW I2C Enable Status Register not supported"
104 depends on SYS_I2C_DW && (TARGET_SPEAR300 || TARGET_SPEAR310 || \
105 TARGET_SPEAR320 || TARGET_SPEAR600 || TARGET_X600)
108 Some versions of the Designware I2C controller do not support the
109 enable status register. This config option can be enabled in such
112 config SYS_I2C_ASPEED
113 bool "Aspeed I2C Controller"
114 depends on DM_I2C && ARCH_ASPEED
116 Say yes here to select Aspeed I2C Host Controller. The driver
117 supports AST2500 and AST2400 controllers, but is very limited.
118 Only single master mode is supported and only byte-by-byte
119 synchronous reads and writes are supported, no Pool Buffers or DMA.
122 bool "Intel I2C/SMBUS driver"
125 Add support for the Intel SMBUS driver. So far this driver is just
126 a stub which perhaps some basic init. There is no implementation of
127 the I2C API meaning that any I2C operations will immediately fail
130 config SYS_I2C_IMX_LPI2C
131 bool "NXP i.MX LPI2C driver"
133 Add support for the NXP i.MX LPI2C driver.
136 bool "Amlogic Meson I2C driver"
137 depends on DM_I2C && ARCH_MESON
139 Add support for the I2C controller available in Amlogic Meson
140 SoCs. The controller supports programmable bus speed including
141 standard (100kbits/s) and fast (400kbit/s) speed and allows the
142 software to define a flexible format of the bit streams. It has an
143 internal buffer holding up to 8 bytes for transfers and supports
144 both 7-bit and 10-bit addresses.
147 bool "NXP MXC I2C driver"
149 Add support for the NXP I2C driver. This supports up to four bus
150 channels and operating on standard mode up to 100 kbits/s and fast
151 mode up to 400 kbits/s.
153 # These settings are not used with DM_I2C, however SPL doesn't use
154 # DM_I2C even if DM_I2C is enabled, and so might use these settings even
155 # when main u-boot does not!
156 if SYS_I2C_MXC && (!DM_I2C || SPL)
157 config SYS_I2C_MXC_I2C1
160 Add support for NXP MXC I2C Controller 1.
161 Required for SoCs which have I2C MXC controller 1 eg LS1088A, LS2080A
163 config SYS_I2C_MXC_I2C2
166 Add support for NXP MXC I2C Controller 2.
167 Required for SoCs which have I2C MXC controller 2 eg LS1088A, LS2080A
169 config SYS_I2C_MXC_I2C3
172 Add support for NXP MXC I2C Controller 3.
173 Required for SoCs which have I2C MXC controller 3 eg LS1088A, LS2080A
175 config SYS_I2C_MXC_I2C4
178 Add support for NXP MXC I2C Controller 4.
179 Required for SoCs which have I2C MXC controller 4 eg LS1088A, LS2080A
181 config SYS_I2C_MXC_I2C5
184 Add support for NXP MXC I2C Controller 5.
185 Required for SoCs which have I2C MXC controller 5 eg LX2160A
187 config SYS_I2C_MXC_I2C6
190 Add support for NXP MXC I2C Controller 6.
191 Required for SoCs which have I2C MXC controller 6 eg LX2160A
193 config SYS_I2C_MXC_I2C7
196 Add support for NXP MXC I2C Controller 7.
197 Required for SoCs which have I2C MXC controller 7 eg LX2160A
199 config SYS_I2C_MXC_I2C8
202 Add support for NXP MXC I2C Controller 8.
203 Required for SoCs which have I2C MXC controller 8 eg LX2160A
207 config SYS_MXC_I2C1_SPEED
208 int "I2C Channel 1 speed"
209 default 40000000 if TARGET_LS2080A_SIMU || TARGET_LS2080A_EMU
212 MXC I2C Channel 1 speed
214 config SYS_MXC_I2C1_SLAVE
222 config SYS_MXC_I2C2_SPEED
223 int "I2C Channel 2 speed"
224 default 40000000 if TARGET_LS2080A_SIMU || TARGET_LS2080A_EMU
227 MXC I2C Channel 2 speed
229 config SYS_MXC_I2C2_SLAVE
237 config SYS_MXC_I2C3_SPEED
238 int "I2C Channel 3 speed"
241 MXC I2C Channel 3 speed
243 config SYS_MXC_I2C3_SLAVE
251 config SYS_MXC_I2C4_SPEED
252 int "I2C Channel 4 speed"
255 MXC I2C Channel 4 speed
257 config SYS_MXC_I2C4_SLAVE
265 config SYS_MXC_I2C5_SPEED
266 int "I2C Channel 5 speed"
269 MXC I2C Channel 5 speed
271 config SYS_MXC_I2C5_SLAVE
279 config SYS_MXC_I2C6_SPEED
280 int "I2C Channel 6 speed"
283 MXC I2C Channel 6 speed
285 config SYS_MXC_I2C6_SLAVE
293 config SYS_MXC_I2C7_SPEED
294 int "I2C Channel 7 speed"
297 MXC I2C Channel 7 speed
299 config SYS_MXC_I2C7_SLAVE
307 config SYS_MXC_I2C8_SPEED
308 int "I2C Channel 8 speed"
311 MXC I2C Channel 8 speed
313 config SYS_MXC_I2C8_SLAVE
320 config SYS_I2C_OMAP24XX
321 bool "TI OMAP2+ I2C driver"
322 depends on ARCH_OMAP2PLUS || ARCH_K3
324 Add support for the OMAP2+ I2C driver.
327 config SYS_OMAP24_I2C_SLAVE
328 int "I2C Slave addr channel 0"
331 OMAP24xx I2C Slave address channel 0
333 config SYS_OMAP24_I2C_SPEED
334 int "I2C Slave channel 0 speed"
337 OMAP24xx Slave speed channel 0
340 config SYS_I2C_RCAR_I2C
341 bool "Renesas RCar I2C driver"
342 depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
344 Support for Renesas RCar I2C controller.
346 config SYS_I2C_RCAR_IIC
347 bool "Renesas RCar Gen3 IIC driver"
348 depends on (RCAR_GEN3 || RCAR_GEN2) && DM_I2C
350 Support for Renesas RCar Gen3 IIC controller.
352 config SYS_I2C_ROCKCHIP
353 bool "Rockchip I2C driver"
356 Add support for the Rockchip I2C driver. This is used with various
357 Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips
358 have several I2C ports and all are provided, controlled by the
361 config SYS_I2C_SANDBOX
362 bool "Sandbox I2C driver"
363 depends on SANDBOX && DM_I2C
365 Enable I2C support for sandbox. This is an emulation of a real I2C
366 bus. Devices can be attached to the bus using the device tree
367 which specifies the driver to use. See sandbox.dts as an example.
369 config SYS_I2C_S3C24X0
370 bool "Samsung I2C driver"
371 depends on ARCH_EXYNOS4 && DM_I2C
373 Support for Samsung I2C controller as Samsung SoCs.
375 config SYS_I2C_STM32F7
376 bool "STMicroelectronics STM32F7 I2C support"
377 depends on (STM32F7 || STM32H7 || ARCH_STM32MP) && DM_I2C
379 Enable this option to add support for STM32 I2C controller
380 introduced with STM32F7/H7 SoCs. This I2C controller supports :
381 _ Slave and master modes
382 _ Multimaster capability
383 _ Standard-mode (up to 100 kHz)
384 _ Fast-mode (up to 400 kHz)
385 _ Fast-mode Plus (up to 1 MHz)
386 _ 7-bit and 10-bit addressing mode
387 _ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)
388 _ All 7-bit addresses acknowledge mode
390 _ Programmable setup and hold times
391 _ Easy to use event management
392 _ Optional clock stretching
396 bool "NVIDIA Tegra internal I2C controller"
399 Support for NVIDIA I2C controller available in Tegra SoCs.
401 config SYS_I2C_UNIPHIER
402 bool "UniPhier I2C driver"
403 depends on ARCH_UNIPHIER && DM_I2C
406 Support for UniPhier I2C controller driver. This I2C controller
407 is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
409 config SYS_I2C_UNIPHIER_F
410 bool "UniPhier FIFO-builtin I2C driver"
411 depends on ARCH_UNIPHIER && DM_I2C
414 Support for UniPhier FIFO-builtin I2C controller driver.
415 This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
417 config SYS_I2C_VERSATILE
418 bool "Arm Ltd Versatile I2C bus driver"
419 depends on DM_I2C && (TARGET_VEXPRESS_CA15_TC2 || TARGET_VEXPRESS64_JUNO)
421 Add support for the Arm Ltd Versatile Express I2C driver. The I2C host
422 controller is present in the development boards manufactured by Arm Ltd.
424 config SYS_I2C_MVTWSI
425 bool "Marvell I2C driver"
428 Support for Marvell I2C controllers as used on the orion5x and
429 kirkwood SoC families.
431 config TEGRA186_BPMP_I2C
432 bool "Enable Tegra186 BPMP-based I2C driver"
433 depends on TEGRA186_BPMP
435 Support for Tegra I2C controllers managed by the BPMP (Boot and
436 Power Management Processor). On Tegra186, some I2C controllers are
437 directly controlled by the main CPU, whereas others are controlled
438 by the BPMP, and can only be accessed by the main CPU via IPC
439 requests to the BPMP. This driver covers the latter case.
441 config SYS_I2C_BUS_MAX
443 depends on ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_SOCFPGA
445 default 3 if OMAP34XX || AM33XX || AM43XX || ARCH_KEYSTONE
446 default 4 if ARCH_SOCFPGA || OMAP44XX || TI814X
447 default 5 if OMAP54XX
449 Define the maximum number of available I2C buses.
451 config SYS_I2C_XILINX_XIIC
452 bool "Xilinx AXI I2C driver"
455 Support for Xilinx AXI I2C controller.
458 bool "gdsys IHS I2C driver"
461 Support for gdsys IHS I2C driver on FPGA bus.
463 source "drivers/i2c/muxes/Kconfig"