Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-03 18:10:13 +00:00
Code Issues Projects Releases Packages Wiki Activity
u-boot/drivers/i2c/Kconfig

243 lines
8.1 KiB
Text
Raw Normal View History

drivers: hierarchize drivers Kconfig menu The menuconfig for drivers are getting more and more cluttered and unreadable because too many entries are displayed in a single flat menu. Use hierarchic menu for each category. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Simon Glass <sjg@chromium.org> [trini: Update to apply again in a few places, drop USB hunk] Signed-off-by: Tom Rini <trini@konsulko.com>
2015-07-25 17:46:26 +00:00
#
# I2C subsystem configuration
#
menu "I2C support"
i2c: add CONFIG_DM_I2C to Kconfig Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
2015-01-13 03:44:35 +00:00
config DM_I2C
bool "Enable Driver Model for I2C drivers"
depends on DM
help
Kconfig: i2c: fix help message related to dm i2c Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org>
2015-03-31 16:57:17 +00:00
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.
i2c: UniPhier: add driver for UniPhier i2c controller This commit adds on-chip I2C driver used on some old Panasonic UniPhier SoCs. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
2015-01-13 03:44:36 +00:00
dm: Move CONFIG_I2C_COMPAT to Kconfig Make this option available in Kconfig and clean up the board that uses it. Note there is also an entry in exynos5-common.h but this affects multiple boards and should be dropped as part of the Samsung I2C migration to driver model. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-02-13 19:20:48 +00:00
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.
dm: cros_ec: Convert the I2C tunnel code to use driver model The Chrome OS EC supports tunnelling through to an I2C bus on the EC. This currently uses a copy of the I2C command code and a special 'crosec' sub-command. With driver model we can define an I2C bus which tunnels through to the EC, and use the normal 'i2c' command to access it. This simplifies the code and removes some duplication. Add an I2C driver which tunnels through to the EC. Adjust the EC code to support binding child devices so that it can be set up. Adjust the existing I2C xfer function to fit driver model better. For now the old code remains to allow things to still work. It will be removed in a later patch once the new flow is fully enabled. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-03 14:19:23 +00:00
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.
cros_ec: Support the LDO access method used by spring Add a driver to support the special LDO access used by spring. This is a custom method in the cros_ec protocol - it does not use an I2C pass-through. There are two implementation choices: 1. Write a special LDO driver which can talk across the EC. Duplicate all the logic from TPS65090 for retrying when the LDO fails to come up. 2. Write a special I2C bus driver which pretends to be a TPS65090 and transfers reads and writes using the LDO message. Either is distasteful. The latter method is chosen since it results in less code duplication and a fairly simple (30-line) implementation of the core logic. The crosec 'ldo' subcommand could be removed (since i2c md/mw will work instead) but is retained as a convenience. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-03 14:19:24 +00:00
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.
dm: cros_ec: Convert the I2C tunnel code to use driver model The Chrome OS EC supports tunnelling through to an I2C bus on the EC. This currently uses a copy of the I2C command code and a special 'crosec' sub-command. With driver model we can define an I2C bus which tunnels through to the EC, and use the normal 'i2c' command to access it. This simplifies the code and removes some duplication. Add an I2C driver which tunnels through to the EC. Adjust the EC code to support binding child devices so that it can be set up. Adjust the existing I2C xfer function to fit driver model better. For now the old code remains to allow things to still work. It will be removed in a later patch once the new flow is fully enabled. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-03 14:19:23 +00:00
i2c: Set default I2C bus number This patch allows using i2c commands (e.g. "i2c probe", "i2c md", etc) without the need to first select the bus number with e.g. "i2c dev 0". This is the "i2c" command behavior similar to the one from pre DM, where by default bus 0 was immediately accessible. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2017-03-21 11:08:25 +00:00
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
dm: i2c: add i2c-gpio driver This commit adds driver model support to software emulated i2c bus driver. This driver supports kernel-style device tree bindings. Fdt properties in use: - compatible - "i2c-gpio" - gpios - data and clock GPIO pin phandles - delay-us - micro seconds delay between GPIOs toggle operations, which is 1/4 of I2C speed clock period. Added: - Config: CONFIG_DM_I2C_GPIO - File: drivers/i2c/i2c-gpio.c - File: doc/device-tree-bindings/i2c/i2c-gpio.txt Driver base code is taken from: drivers/i2c/soft-i2c.c, changes: - use "i2c-gpio" naming - update comments style - move preprocesor macros into functions - add device tree support - add driver model i2c support - code cleanup, - add Kconfig entry Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Added braces in i2c_gpio_xfer() to fix style nit: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-03-31 16:57:18 +00:00
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
i2c: atmel: add i2c driver Add i2c driver. Signed-off-by: Songjun Wu <songjun.wu@atmel.com> Reviewed-by: Heiko Schocher <hs@denx.de> Acked-by: Heiko Schocher <hs@denx.de>
2016-06-20 05:22:38 +00:00
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
dm: fsl_i2c: Enable DM for FSL I2C Signed-off-by: Mario Six <mario.six@gdsys.cc>
2016-04-25 06:31:09 +00:00
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.
dm: i2c: Add driver for Cadence I2C IP This is a possible drop in replacement for drivers/i2c/zynq-i2c.c Since this is cadence IP it has been renamed to cdns-i2c, to make sense with the compatible string. Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com> Reviewed-by: Heiko Schocher <hs@denx.de> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2015-12-28 17:47:11 +00:00
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.
i2c: Add entry for Designware I2C driver in Kconfig This patch adds an entry for the Designware I2C driver in Kconfig. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Heiko Schocher <hs@denx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-04-28 07:47:17 +00:00
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.
i2c: Select SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED for SPEAr The DW I2C controller in the SPEAr SoCs doesn't support the enable status register check. This patch selects SYS_I2C_DW_ENABLE_STATUS_UNSUPPORTED for these boards. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Heiko Schocher <hs@denx.de>
2016-04-28 07:47:19 +00:00
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.
aspeed: Add I2C Driver Add Device Model based I2C driver for ast2500/ast2400 SoCs. The driver is very limited, it only supports master mode and synchronous byte-by-byte reads/writes, no DMA or Pool Buffers. Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
2017-04-17 19:00:30 +00:00
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.
x86: i2c: Add a stub driver for Intel I2C/SMbus This is used on most Intel platforms. We don't have a driver for it yet, but add a stub to handle the init. For now this targets ivybridge so we may want to add a device tree binding and generalise it when other platforms are supported. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-17 23:11:44 +00:00
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.
i2c: lpi2c: add lpi2c driver for i.MX7ULP Add lpi2c driver for i.MX7ULP. Need to enable the two options to use this driver: CONFIG_DM_I2C=y CONFIG_SYS_I2C_IMX_LPI2C=y Signed-off-by: Peng Fan <peng.fan@nxp.com> Acked-by: Heiko Schocher <hs@denx.de> Cc: Stefano Babic <sbabic@denx.de>
2017-02-24 01:54:18 +00:00
config SYS_I2C_IMX_LPI2C
bool "NXP i.MX LPI2C driver"
help
Add support for the NXP i.MX LPI2C driver.
i2c: Kconfig: Add SYS_I2C_MXC entry Added kconfig for SYS_I2C_MXC driver. Cc: Stefano Babic <sbabic@denx.de> Cc: Heiko Schocher <hs@denx.de> Cc: Matteo Lisi <matteo.lisi@engicam.com> Cc: Michael Trimarchi <michael@amarulasolutions.com> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
2016-12-05 23:00:57 +00:00
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.
Convert CONFIG_SYS_I2C_OMAP24XX to Kconfig This converts the following to Kconfig: CONFIG_SYS_I2C_OMAP24XX Signed-off-by: Adam Ford <aford173@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2017-08-07 18:11:34 +00:00
config SYS_I2C_OMAP24XX
bool "TI OMAP2+ I2C driver"
depends on ARCH_OMAP2PLUS
help
Add support for the OMAP2+ I2C driver.
rockchip: Add I2C driver Add an I2C driver for the Rockchip RK3288, using driver model. It should work for other Rockchip SoCs also. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-30 22:55:39 +00:00
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.
sandbox: Move CONFIG_SYS_I2C_SANDBOX to Kconfig Move this over to Kconfig and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher<hs@denx.de>
2015-03-06 20:19:04 +00:00
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
i2c: sandbox: remove code snippet from Kconfig help With the Kconfig re-sync with Linux 4.10, characters such as '}', ';' in Kconfig help message cause warnings: $ make defconfig *** Default configuration is based on 'sandbox_defconfig' drivers/i2c/Kconfig:132:warning: ignoring unsupported character '}' drivers/i2c/Kconfig:132:warning: ignoring unsupported character ';' Drop the Device Tree fragment from the help. Acked-by: Heiko Schocher <hs@denx.de> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-02-11 03:39:55 +00:00
which specifies the driver to use. See sandbox.dts as an example.
sandbox: Move CONFIG_SYS_I2C_SANDBOX to Kconfig Move this over to Kconfig and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher<hs@denx.de>
2015-03-06 20:19:04 +00:00
i2c: Kconfig: Add SYS_I2C_S3C24X0 entry Adding Kconfig for SYS_I2C_S3C24X0. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2017-01-09 05:47:52 +00:00
config SYS_I2C_S3C24X0
bool "Samsung I2C driver"
depends on ARCH_EXYNOS4 && DM_I2C
help
Support for Samsung I2C controller as Samsung SoCs.
sandbox: Move CONFIG_SYS_I2C_SANDBOX to Kconfig Move this over to Kconfig and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher<hs@denx.de>
2015-03-06 20:19:04 +00:00
i2c: add i2c driver for stm32 Add i2c driver which can be used on both STM32F7 and STM32H7. This I2C block supports the following features: _ 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 Signed-off-by: Christophe Kerello <christophe.kerello@st.com> Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-08-09 12:45:27 +00:00
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
i2c: UniPhier: add driver for UniPhier i2c controller This commit adds on-chip I2C driver used on some old Panasonic UniPhier SoCs. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
2015-01-13 03:44:36 +00:00
config SYS_I2C_UNIPHIER
bool "UniPhier I2C driver"
depends on ARCH_UNIPHIER && DM_I2C
default y
help
ARM: UniPhier: update the vendor name of UniPhier in Kconfig The business for UniPhier Soc family has been transferred from Panasonic Corporation to Socionext Inc. Update the SoC select menu in Kconfig. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-05-29 08:30:01 +00:00
Support for UniPhier I2C controller driver. This I2C controller
is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
i2c: UniPhier: add driver for UniPhier FIFO-builtin i2c controller This commit adds on-chip I2C driver used on newer SoCs of Panasonic UniPhier platform. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
2015-01-13 03:44:37 +00:00
config SYS_I2C_UNIPHIER_F
bool "UniPhier FIFO-builtin I2C driver"
depends on ARCH_UNIPHIER && DM_I2C
default y
help
ARM: UniPhier: update the vendor name of UniPhier in Kconfig The business for UniPhier Soc family has been transferred from Panasonic Corporation to Socionext Inc. Update the SoC select menu in Kconfig. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-05-29 08:30:01 +00:00
Support for UniPhier FIFO-builtin I2C controller driver.
i2c: UniPhier: add driver for UniPhier FIFO-builtin i2c controller This commit adds on-chip I2C driver used on newer SoCs of Panasonic UniPhier platform. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
2015-01-13 03:44:37 +00:00
This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
dm: i2c: Add support for multiplexed I2C buses Add a new I2C_MUX uclass. Devices in this class can multiplex between several I2C buses, selecting them one at a time for use by the system. The multiplexing mechanism is left to the driver to decide - it may be controlled by GPIOs, for example. The uclass supports only two methods: select() and deselect(). The current mux state is expected to be stored in the mux itself since it is the only thing that knows how to make things work. The mux can record the current state and then avoid switching unless it is necessary. So select() can be skipped if the mux is already in the correct state. Also deselect() can be made a nop if required. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-03 14:19:21 +00:00
i2c: mvtwsi: Add compatibility to DM This patch adds the necessary functions and Kconfig entry to make the MVTWSI I2C driver compatible with the driver model. A possible device tree entry might look like this: i2c@11100 { compatible = "marvell,mv64xxx-i2c"; reg = <0x11000 0x20>; clock-frequency = <100000>; u-boot,i2c-slave-addr = <0x0>; }; Signed-off-by: Mario Six <mario.six@gdsys.cc> Reviewed-by: Stefan Roese <sr@denx.de>
2016-07-21 09:57:10 +00:00
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.
i2c: add Tegra186 BPMP driver 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. Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de> Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-08-08 17:28:27 +00:00
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.
Convert CONFIG_SYS_I2C_BUS_MAX to Kconfig This converts the following to Kconfig: CONFIG_SYS_I2C_BUS_MAX Signed-off-by: Adam Ford <aford173@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de> [trini: Fix AM43XX drop AM44XX] Signed-off-by: Tom Rini <trini@konsulko.com>
2017-08-11 11:39:34 +00:00
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.
dm: i2c: Add support for multiplexed I2C buses Add a new I2C_MUX uclass. Devices in this class can multiplex between several I2C buses, selecting them one at a time for use by the system. The multiplexing mechanism is left to the driver to decide - it may be controlled by GPIOs, for example. The uclass supports only two methods: select() and deselect(). The current mux state is expected to be stored in the mux itself since it is the only thing that knows how to make things work. The mux can record the current state and then avoid switching unless it is necessary. So select() can be skipped if the mux is already in the correct state. Also deselect() can be made a nop if required. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-03 14:19:21 +00:00
source "drivers/i2c/muxes/Kconfig"
drivers: hierarchize drivers Kconfig menu The menuconfig for drivers are getting more and more cluttered and unreadable because too many entries are displayed in a single flat menu. Use hierarchic menu for each category. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Simon Glass <sjg@chromium.org> [trini: Update to apply again in a few places, drop USB hunk] Signed-off-by: Tom Rini <trini@konsulko.com>
2015-07-25 17:46:26 +00:00
endmenu
Reference in a new issue Copy permalink