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linux/drivers/i2c
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Sagar Shrikant Kadam c45d4ba867 i2c: ocores: add polling mode workaround for Sifive FU540-C000 SoC 
The i2c-ocore driver already has a polling mode interface.But it needs
a workaround for FU540 Chipset on HiFive unleashed board (RevA00).
There is an erratum in FU540 chip that prevents interrupt driven i2c
transfers from working, and also the I2C controller's interrupt bit
cannot be cleared if set, due to this the existing i2c polling mode
interface added in mainline earlier doesn't work, and CPU stall's
infinitely, when-ever i2c transfer is initiated.

Ref:
	commit dd7dbf0eb0 ("i2c: ocores: refactor setup for polling")

The workaround / fix under OCORES_FLAG_BROKEN_IRQ is particularly for
FU540-COOO SoC.

The polling function identifies a SiFive device based on the device node
and enables the workaround.

Signed-off-by: Sagar Shrikant Kadam <sagar.kadam@sifive.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2019-06-14 23:24:33 +02:00
..
algos treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
busses i2c: ocores: add polling mode workaround for Sifive FU540-C000 SoC 2019-06-14 23:24:33 +02:00
muxes treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
i2c-boardinfo.c
i2c-core-acpi.c i2c: acpi: export i2c_acpi_find_adapter_by_handle 2019-06-02 21:56:04 +02:00
i2c-core-base.c i2c: core: add device-managed version of i2c_new_dummy 2019-05-17 19:29:40 +02:00
i2c-core-of.c i2c: of: Try to find an I2C adapter matching the parent 2019-02-05 13:41:49 +01:00
i2c-core-slave.c i2c: remove i2c_lock_adapter and use i2c_lock_bus directly 2018-07-13 00:09:37 +02:00
i2c-core-smbus.c i2c: core: apply 'is_suspended' check for SMBus, too 2019-05-03 16:44:51 +02:00
i2c-core.h i2c: core: apply 'is_suspended' check for SMBus, too 2019-05-03 16:44:51 +02:00
i2c-dev.c i2c: expand minor range when registering chrdev region 2019-02-15 09:53:34 +01:00
i2c-mux.c i2c: mux: populate the new *_atomic callbacks 2019-04-16 13:08:12 +02:00
i2c-slave-eeprom.c
i2c-smbus.c
i2c-stub.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile i2c: don't use any __deprecated handling anymore 2018-08-24 17:26:43 +02:00