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| author | David Box <david.e.box@linux.intel.com> | 2015-01-15 10:12:17 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2015-01-26 12:26:25 +0100 |
| commit | 894acb2f823b13afacfe40b02efbd9146af58586 (patch) | |
| tree | 0f4b01bb796bfbceaf1764111a356581502bedcd /drivers/i2c/busses/Kconfig | |
| parent | i2c: designware: Add i2c bus locking support (diff) | |
| download | linux-894acb2f823b13afacfe40b02efbd9146af58586.tar.xz linux-894acb2f823b13afacfe40b02efbd9146af58586.zip | |
i2c: designware: Add Intel Baytrail PMIC I2C bus support
This patch implements an I2C bus sharing mechanism between the host and platform
hardware on select Intel BayTrail SoC platforms using the X-Powers AXP288 PMIC.
On these platforms access to the PMIC must be shared with platform hardware. The
hardware unit assumes full control of the I2C bus and the host must request
access through a special semaphore. Hardware control of the bus also makes it
necessary to disable runtime pm to avoid interfering with hardware transactions.
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/busses/Kconfig')
| -rw-r--r-- | drivers/i2c/busses/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index 31e8308ba899..83062b2c0e6b 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -465,6 +465,17 @@ config I2C_DESIGNWARE_PCI This driver can also be built as a module. If so, the module will be called i2c-designware-pci. +config I2C_DESIGNWARE_BAYTRAIL + bool "Intel Baytrail I2C semaphore support" + depends on I2C_DESIGNWARE_PLATFORM + select IOSF_MBI + help + This driver enables managed host access to the PMIC I2C bus on select + Intel BayTrail platforms using the X-Powers AXP288 PMIC. It allows + the host to request uninterrupted access to the PMIC's I2C bus from + the platform firmware controlling it. You should say Y if running on + a BayTrail system using the AXP288. + config I2C_EFM32 tristate "EFM32 I2C controller" depends on ARCH_EFM32 || COMPILE_TEST |