[people/ms/u-boot.git] / drivers / i2c / Kconfig

#
# I2C subsystem configuration
#

menu "I2C support"

config DM_I2C
	bool "Enable Driver Model for I2C drivers"
	depends on DM
	help
	  Enable driver model for I2C. The I2C uclass interface: probe, read,
	  write and speed, is implemented with the bus drivers operations,
	  which provide methods for bus setting and data transfer. Each chip
	  device (bus child) info is kept as parent platdata. The interface
	  is defined in include/i2c.h. When i2c bus driver supports the i2c
	  uclass, but the device drivers not, then DM_I2C_COMPAT config can
	  be used as compatibility layer.

config DM_I2C_COMPAT
	bool "Enable I2C compatibility layer"
	depends on DM
	help
	  Enable old-style I2C functions for compatibility with existing code.
	  This option can be enabled as a temporary measure to avoid needing
	  to convert all code for a board in a single commit. It should not
	  be enabled for any board in an official release.

config I2C_CROS_EC_TUNNEL
	tristate "Chrome OS EC tunnel I2C bus"
	depends on CROS_EC
	help
	  This provides an I2C bus that will tunnel i2c commands through to
	  the other side of the Chrome OS EC to the I2C bus connected there.
	  This will work whatever the interface used to talk to the EC (SPI,
	  I2C or LPC). Some Chromebooks use this when the hardware design
	  does not allow direct access to the main PMIC from the AP.

config I2C_CROS_EC_LDO
	bool "Provide access to LDOs on the Chrome OS EC"
	depends on CROS_EC
	---help---
	On many Chromebooks the main PMIC is inaccessible to the AP. This is
	often dealt with by using an I2C pass-through interface provided by
	the EC. On some unfortunate models (e.g. Spring) the pass-through
	is not available, and an LDO message is available instead. This
	option enables a driver which provides very basic access to those
	regulators, via the EC. We implement this as an I2C bus	which
	emulates just the TPS65090 messages we know about. This is done to
	avoid duplicating the logic in the TPS65090 regulator driver for
	enabling/disabling an LDO.

config I2C_SET_DEFAULT_BUS_NUM
	bool "Set default I2C bus number"
	depends on DM_I2C
	help
	  Set default number of I2C bus to be accessed. This option provides
	  behaviour similar to old (i.e. pre DM) I2C bus driver.

config I2C_DEFAULT_BUS_NUMBER
	hex "I2C default bus number"
	depends on I2C_SET_DEFAULT_BUS_NUM
	default 0x0
	help
	  Number of default I2C bus to use

config DM_I2C_GPIO
	bool "Enable Driver Model for software emulated I2C bus driver"
	depends on DM_I2C && DM_GPIO
	help
	  Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
	  configuration is given by the device tree. Kernel-style device tree
	  bindings are supported.
	  Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt

config SYS_I2C_AT91
	bool "Atmel I2C driver"
	depends on DM_I2C && ARCH_AT91
	help
	  Add support for the Atmel I2C driver. A serious problem is that there
	  is no documented way to issue repeated START conditions for more than
	  two messages, as needed to support combined I2C messages. Use the
	  i2c-gpio driver unless your system can cope with this limitation.
	  Binding info: doc/device-tree-bindings/i2c/i2c-at91.txt

config SYS_I2C_FSL
       bool "Freescale I2C bus driver"
       depends on DM_I2C
       help
	  Add support for Freescale I2C busses as used on MPC8240, MPC8245, and
	  MPC85xx processors.

config SYS_I2C_CADENCE
	tristate "Cadence I2C Controller"
	depends on DM_I2C && (ARCH_ZYNQ || ARM64)
	help
	  Say yes here to select Cadence I2C Host Controller. This controller is
	  e.g. used by Xilinx Zynq.

config SYS_I2C_DW
	bool "Designware I2C Controller"
	default n
	help
	  Say yes here to select the Designware I2C Host Controller. This
	  controller is used in various SoCs, e.g. the ST SPEAr, Altera
	  SoCFPGA, Synopsys ARC700 and some Intel x86 SoCs.

config SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED
	bool "DW I2C Enable Status Register not supported"
	depends on SYS_I2C_DW && (TARGET_SPEAR300 || TARGET_SPEAR310 || \
		TARGET_SPEAR320 || TARGET_SPEAR600 || TARGET_X600)
	default y
	help
	  Some versions of the Designware I2C controller do not support the
	  enable status register. This config option can be enabled in such
	  cases.

config SYS_I2C_ASPEED
	bool "Aspeed I2C Controller"
	depends on DM_I2C && ARCH_ASPEED
	help
	  Say yes here to select Aspeed I2C Host Controller. The driver
	  supports AST2500 and AST2400 controllers, but is very limited.
	  Only single master mode is supported and only byte-by-byte
	  synchronous reads and writes are supported, no Pool Buffers or DMA.

config SYS_I2C_INTEL
	bool "Intel I2C/SMBUS driver"
	depends on DM_I2C
	help
	  Add support for the Intel SMBUS driver. So far this driver is just
	  a stub which perhaps some basic init. There is no implementation of
	  the I2C API meaning that any I2C operations will immediately fail
	  for now.

config SYS_I2C_IMX_LPI2C
	bool "NXP i.MX LPI2C driver"
	help
	  Add support for the NXP i.MX LPI2C driver.

config SYS_I2C_MESON
	bool "Amlogic Meson I2C driver"
	depends on DM_I2C && ARCH_MESON
	help
	  Add support for the I2C controller available in Amlogic Meson
	  SoCs. The controller supports programmable bus speed including
	  standard (100kbits/s) and fast (400kbit/s) speed and allows the
	  software to define a flexible format of the bit streams. It has an
	  internal buffer holding up to 8 bytes for transfers and supports
	  both 7-bit and 10-bit addresses.

config SYS_I2C_MXC
	bool "NXP i.MX I2C driver"
	depends on MX6
	help
	  Add support for the NXP i.MX I2C driver. This supports upto for bus
	  channels and operating on standard mode upto 100 kbits/s and fast
	  mode upto 400 kbits/s.

config SYS_I2C_OMAP24XX
	bool "TI OMAP2+ I2C driver"
	depends on ARCH_OMAP2PLUS
	help
	  Add support for the OMAP2+ I2C driver.

config SYS_I2C_RCAR_IIC
	bool "Renesas RCar Gen3 IIC driver"
	depends on RCAR_GEN3 && DM_I2C
	help
	  Support for Renesas RCar Gen3 IIC controller.

config SYS_I2C_ROCKCHIP
	bool "Rockchip I2C driver"
	depends on DM_I2C
	help
	  Add support for the Rockchip I2C driver. This is used with various
	  Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips
	  have several I2C ports and all are provided, controled by the
	  device tree.

config SYS_I2C_SANDBOX
	bool "Sandbox I2C driver"
	depends on SANDBOX && DM_I2C
	help
	  Enable I2C support for sandbox. This is an emulation of a real I2C
	  bus. Devices can be attached to the bus using the device tree
	  which specifies the driver to use.  See sandbox.dts as an example.

config SYS_I2C_S3C24X0
	bool "Samsung I2C driver"
	depends on ARCH_EXYNOS4 && DM_I2C
	help
	  Support for Samsung I2C controller as Samsung SoCs.

config SYS_I2C_STM32F7
	bool "STMicroelectronics STM32F7 I2C support"
	depends on (STM32F7 || STM32H7) && DM_I2C
	help
	  Enable this option to add support for STM32 I2C controller
	  introduced with STM32F7/H7 SoCs. This I2C controller supports :
	   _ Slave and master modes
	   _ Multimaster capability
	   _ Standard-mode (up to 100 kHz)
	   _ Fast-mode (up to 400 kHz)
	   _ Fast-mode Plus (up to 1 MHz)
	   _ 7-bit and 10-bit addressing mode
	   _ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)
	   _ All 7-bit addresses acknowledge mode
	   _ General call
	   _ Programmable setup and hold times
	   _ Easy to use event management
	   _ Optional clock stretching
	   _ Software reset

config SYS_I2C_UNIPHIER
	bool "UniPhier I2C driver"
	depends on ARCH_UNIPHIER && DM_I2C
	default y
	help
	  Support for UniPhier I2C controller driver.  This I2C controller
	  is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.

config SYS_I2C_UNIPHIER_F
	bool "UniPhier FIFO-builtin I2C driver"
	depends on ARCH_UNIPHIER && DM_I2C
	default y
	help
	  Support for UniPhier FIFO-builtin I2C controller driver.
	  This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.

config SYS_I2C_MVTWSI
	bool "Marvell I2C driver"
	depends on DM_I2C
	help
	  Support for Marvell I2C controllers as used on the orion5x and
	  kirkwood SoC families.

config TEGRA186_BPMP_I2C
	bool "Enable Tegra186 BPMP-based I2C driver"
	depends on TEGRA186_BPMP
	help
	  Support for Tegra I2C controllers managed by the BPMP (Boot and
	  Power Management Processor). On Tegra186, some I2C controllers are
	  directly controlled by the main CPU, whereas others are controlled
	  by the BPMP, and can only be accessed by the main CPU via IPC
	  requests to the BPMP. This driver covers the latter case.

config SYS_I2C_BUS_MAX
	int "Max I2C busses"
	depends on ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_SOCFPGA
	default 2 if TI816X
	default 3 if OMAP34XX || AM33XX || AM43XX || ARCH_KEYSTONE
	default 4 if ARCH_SOCFPGA || OMAP44XX || TI814X
	default 5 if OMAP54XX
	help
	  Define the maximum number of available I2C buses.

source "drivers/i2c/muxes/Kconfig"

endmenu
Commit	Line	Data
0b11dbf7 MY	1	#
	2	# I2C subsystem configuration
	3	#
	4
	5	menu "I2C support"
	6
b6036bcd MY	7	config DM_I2C
	8	bool "Enable Driver Model for I2C drivers"
	9	depends on DM
	10	help
705fcf4d PM	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.
26f820f3	18
4bba9d3f SG	19	config DM_I2C_COMPAT
	20	bool "Enable I2C compatibility layer"
	21	depends on DM
	22	help
	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.
	27
cc456bd7 SG	28	config I2C_CROS_EC_TUNNEL
	29	tristate "Chrome OS EC tunnel I2C bus"
	30	depends on CROS_EC
	31	help
	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.
	37
f48eaf01 SG	38	config I2C_CROS_EC_LDO
	39	bool "Provide access to LDOs on the Chrome OS EC"
	40	depends on CROS_EC
	41	---help---
	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.
cc456bd7	51
e46f8a33 LM	52	config I2C_SET_DEFAULT_BUS_NUM
	53	bool "Set default I2C bus number"
	54	depends on DM_I2C
	55	help
	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.
	58
	59	config I2C_DEFAULT_BUS_NUMBER
	60	hex "I2C default bus number"
	61	depends on I2C_SET_DEFAULT_BUS_NUM
	62	default 0x0
	63	help
	64	Number of default I2C bus to use
	65
c54473cb PM	66	config DM_I2C_GPIO
	67	bool "Enable Driver Model for software emulated I2C bus driver"
	68	depends on DM_I2C && DM_GPIO
	69	help
	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
	74
8800e0fa SW	75	config SYS_I2C_AT91
	76	bool "Atmel I2C driver"
	77	depends on DM_I2C && ARCH_AT91
	78	help
	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
	84
dbc82ce3	85	config SYS_I2C_FSL
	86	bool "Freescale I2C bus driver"
	87	depends on DM_I2C
	88	help
	89	Add support for Freescale I2C busses as used on MPC8240, MPC8245, and
	90	MPC85xx processors.
	91
fdec2d21 MF	92	config SYS_I2C_CADENCE
	93	tristate "Cadence I2C Controller"
	94	depends on DM_I2C && (ARCH_ZYNQ \|\| ARM64)
	95	help
	96	Say yes here to select Cadence I2C Host Controller. This controller is
	97	e.g. used by Xilinx Zynq.
	98
e32d0db7 SR	99	config SYS_I2C_DW
	100	bool "Designware I2C Controller"
	101	default n
	102	help
	103	Say yes here to select the Designware I2C Host Controller. This
	104	controller is used in various SoCs, e.g. the ST SPEAr, Altera
	105	SoCFPGA, Synopsys ARC700 and some Intel x86 SoCs.
	106
3a370528 SR	107	config SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED
	108	bool "DW I2C Enable Status Register not supported"
	109	depends on SYS_I2C_DW && (TARGET_SPEAR300 \|\| TARGET_SPEAR310 \|\| \
	110	TARGET_SPEAR320 \|\| TARGET_SPEAR600 \|\| TARGET_X600)
	111	default y
	112	help
	113	Some versions of the Designware I2C controller do not support the
	114	enable status register. This config option can be enabled in such
	115	cases.
	116
4dc038f3	117	config SYS_I2C_ASPEED
	118	bool "Aspeed I2C Controller"
	119	depends on DM_I2C && ARCH_ASPEED
	120	help
	121	Say yes here to select Aspeed I2C Host Controller. The driver
	122	supports AST2500 and AST2400 controllers, but is very limited.
	123	Only single master mode is supported and only byte-by-byte
	124	synchronous reads and writes are supported, no Pool Buffers or DMA.
	125
abb0b01e SG	126	config SYS_I2C_INTEL
	127	bool "Intel I2C/SMBUS driver"
	128	depends on DM_I2C
	129	help
	130	Add support for the Intel SMBUS driver. So far this driver is just
	131	a stub which perhaps some basic init. There is no implementation of
	132	the I2C API meaning that any I2C operations will immediately fail
	133	for now.
	134
7ee3f149 PF	135	config SYS_I2C_IMX_LPI2C
7ee3f149 PF	136	bool "NXP i.MX LPI2C driver"
7ee3f149 PF	137	help
	138	Add support for the NXP i.MX LPI2C driver.
	139
f8d9ca18 BG	140	config SYS_I2C_MESON
	141	bool "Amlogic Meson I2C driver"
	142	depends on DM_I2C && ARCH_MESON
	143	help
4ecbb8b6 BG	144	Add support for the I2C controller available in Amlogic Meson
	145	SoCs. The controller supports programmable bus speed including
	146	standard (100kbits/s) and fast (400kbit/s) speed and allows the
	147	software to define a flexible format of the bit streams. It has an
	148	internal buffer holding up to 8 bytes for transfers and supports
	149	both 7-bit and 10-bit addresses.
f8d9ca18	150
72c8c10b JT	151	config SYS_I2C_MXC
	152	bool "NXP i.MX I2C driver"
	153	depends on MX6
	154	help
	155	Add support for the NXP i.MX I2C driver. This supports upto for bus
	156	channels and operating on standard mode upto 100 kbits/s and fast
	157	mode upto 400 kbits/s.
	158
daa0f050 AF	159	config SYS_I2C_OMAP24XX
	160	bool "TI OMAP2+ I2C driver"
	161	depends on ARCH_OMAP2PLUS
	162	help
	163	Add support for the OMAP2+ I2C driver.
	164
9e75ea46 MV	165	config SYS_I2C_RCAR_IIC
	166	bool "Renesas RCar Gen3 IIC driver"
	167	depends on RCAR_GEN3 && DM_I2C
	168	help
	169	Support for Renesas RCar Gen3 IIC controller.
	170
34374699 SG	171	config SYS_I2C_ROCKCHIP
	172	bool "Rockchip I2C driver"
	173	depends on DM_I2C
	174	help
	175	Add support for the Rockchip I2C driver. This is used with various
	176	Rockchip parts such as RK3126, RK3128, RK3036 and RK3288. All chips
	177	have several I2C ports and all are provided, controled by the
	178	device tree.
	179
1174aada SG	180	config SYS_I2C_SANDBOX
	181	bool "Sandbox I2C driver"
	182	depends on SANDBOX && DM_I2C
	183	help
	184	Enable I2C support for sandbox. This is an emulation of a real I2C
	185	bus. Devices can be attached to the bus using the device tree
c77c7db5	186	which specifies the driver to use. See sandbox.dts as an example.
1174aada	187
1d61ad95 JC	188	config SYS_I2C_S3C24X0
	189	bool "Samsung I2C driver"
	190	depends on ARCH_EXYNOS4 && DM_I2C
	191	help
	192	Support for Samsung I2C controller as Samsung SoCs.
1174aada	193
4fadcaf0 PC	194	config SYS_I2C_STM32F7
	195	bool "STMicroelectronics STM32F7 I2C support"
	196	depends on (STM32F7 \|\| STM32H7) && DM_I2C
	197	help
	198	Enable this option to add support for STM32 I2C controller
	199	introduced with STM32F7/H7 SoCs. This I2C controller supports :
	200	_ Slave and master modes
	201	_ Multimaster capability
	202	_ Standard-mode (up to 100 kHz)
	203	_ Fast-mode (up to 400 kHz)
	204	_ Fast-mode Plus (up to 1 MHz)
	205	_ 7-bit and 10-bit addressing mode
	206	_ Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)
	207	_ All 7-bit addresses acknowledge mode
	208	_ General call
	209	_ Programmable setup and hold times
	210	_ Easy to use event management
	211	_ Optional clock stretching
	212	_ Software reset
	213
26f820f3 MY	214	config SYS_I2C_UNIPHIER
	215	bool "UniPhier I2C driver"
	216	depends on ARCH_UNIPHIER && DM_I2C
	217	default y
	218	help
b6ef3a3f MY	219	Support for UniPhier I2C controller driver. This I2C controller
b6ef3a3f MY	220	is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
238bd0b8 MY	221
	222	config SYS_I2C_UNIPHIER_F
	223	bool "UniPhier FIFO-builtin I2C driver"
	224	depends on ARCH_UNIPHIER && DM_I2C
	225	default y
	226	help
b6ef3a3f	227	Support for UniPhier FIFO-builtin I2C controller driver.
238bd0b8	228	This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
3d1957f0	229
14a6ff2c	230	config SYS_I2C_MVTWSI
	231	bool "Marvell I2C driver"
	232	depends on DM_I2C
	233	help
	234	Support for Marvell I2C controllers as used on the orion5x and
	235	kirkwood SoC families.
	236
34f1c9fe SW	237	config TEGRA186_BPMP_I2C
	238	bool "Enable Tegra186 BPMP-based I2C driver"
	239	depends on TEGRA186_BPMP
	240	help
	241	Support for Tegra I2C controllers managed by the BPMP (Boot and
	242	Power Management Processor). On Tegra186, some I2C controllers are
	243	directly controlled by the main CPU, whereas others are controlled
	244	by the BPMP, and can only be accessed by the main CPU via IPC
	245	requests to the BPMP. This driver covers the latter case.
	246
fc760cc6 AF	247	config SYS_I2C_BUS_MAX
	248	int "Max I2C busses"
	249	depends on ARCH_KEYSTONE \|\| ARCH_OMAP2PLUS \|\| ARCH_SOCFPGA
	250	default 2 if TI816X
	251	default 3 if OMAP34XX \|\| AM33XX \|\| AM43XX \|\| ARCH_KEYSTONE
	252	default 4 if ARCH_SOCFPGA \|\| OMAP44XX \|\| TI814X
	253	default 5 if OMAP54XX
	254	help
	255	Define the maximum number of available I2C buses.
	256
3d1957f0	257	source "drivers/i2c/muxes/Kconfig"
0b11dbf7 MY	258
0b11dbf7 MY	259	endmenu