linux/drivers/bcma
Boris Brezillon a58d0b4d51 bcma: Allow selection of this driver when COMPILE_TEST=y
This allows us to increase compile-test coverage without having to build
a kernel for MIPS.  That's particularly interesting for subsystem
maintainers that want to test as many drivers as possible in a single
build.

We also add a dependency on HAS_IOMEM in BCMA_HOST_SOC to make sure the
driver is not selected when the arch does not implement IO accessors.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
2018-07-18 09:34:19 +02:00
..
Kconfig bcma: Allow selection of this driver when COMPILE_TEST=y 2018-07-18 09:34:19 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
README
TODO
bcma_private.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
core.c
driver_chipcommon.c
driver_chipcommon_b.c
driver_chipcommon_nflash.c
driver_chipcommon_pflash.c
driver_chipcommon_pmu.c bcma: Replace mdelay with usleep_range in bcma_pmu_resources_init 2018-02-27 15:52:13 +02:00
driver_chipcommon_sflash.c
driver_gmac_cmn.c
driver_gpio.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
driver_mips.c bcma: fix buffer size caused crash in bcma_core_mips_print_irq() 2018-05-12 11:36:59 +03:00
driver_pci.c
driver_pci_host.c
driver_pcie2.c bcma: Adjust block comment 2017-12-07 15:33:02 +02:00
host_pci.c bcma: add HP Stream Notebook 2018-02-28 16:37:22 +02:00
host_soc.c
main.c drivers: remove force dma flag from buses 2018-05-03 16:25:08 +02:00
scan.c
scan.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sprom.c

README

Broadcom introduced new bus as replacement for older SSB. It is based on AMBA,
however from programming point of view there is nothing AMBA specific we use.

Standard AMBA drivers are platform specific, have hardcoded addresses and use
AMBA standard fields like CID and PID.

In case of Broadcom's cards every device consists of:
1) Broadcom specific AMBA device. It is put on AMBA bus, but can not be treated
   as standard AMBA device. Reading it's CID or PID can cause machine lockup.
2) AMBA standard devices called ports or wrappers. They have CIDs (AMBA_CID)
   and PIDs (0x103BB369), but we do not use that info for anything. One of that
   devices is used for managing Broadcom specific core.

Addresses of AMBA devices are not hardcoded in driver and have to be read from
EPROM.

In this situation we decided to introduce separated bus. It can contain up to
16 devices identified by Broadcom specific fields: manufacturer, id, revision
and class.