kernel_optimize_test/drivers/bcma
Rafał Miłecki 0510931ef5 bcma: use module_init for the main part of bus initialization
So far we were using fs_initcall. It was (and still is) needed because
struct bus_type has to be registered early. However main bus
initialization has to happen later as it requires SPROM which depends on
NVRAM which depends on mtd.
Solve it by using fs_initcall only for bus_register call and module_init
for the rest. It affects bcma only when built-in obviously.

This was tested with BCM4706 and BCM5357C0 (BCM47XX), BCM4708A0
(ARCH_BCM_5301X) and BCM43225 (PCIe card with bcma as module).

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2015-12-31 10:17:05 +02:00
..
bcma_private.h bcma: fix access to host_pdev for PCIe devices 2015-08-10 22:20:46 +03:00
core.c
driver_chipcommon_b.c
driver_chipcommon_nflash.c
driver_chipcommon_pmu.c
driver_chipcommon_sflash.c
driver_chipcommon.c bcma: fix watchdog on some ARM chipsets 2015-01-29 10:44:44 +02:00
driver_gmac_cmn.c
driver_gpio.c bcma: switch GPIO portions to use GPIOLIB_IRQCHIP 2015-08-18 09:08:47 +03:00
driver_mips.c MIPS: BCM47xx: Move NVRAM header to the include/linux/. 2015-04-01 17:22:00 +02:00
driver_pci_host.c bcma: add missing includes 2015-03-03 15:26:38 +02:00
driver_pci.c bcma: move PCI IRQ control function to host specific code 2015-03-13 16:25:50 +02:00
driver_pcie2.c bcma: add missing includes 2015-03-03 15:26:38 +02:00
host_pci.c bcma: move PCI IRQ control function to host specific code 2015-03-13 16:25:50 +02:00
host_soc.c bcma: use standard bus scanning during early register 2015-01-23 21:47:55 +02:00
Kconfig bcma: switch GPIO portions to use GPIOLIB_IRQCHIP 2015-08-18 09:08:47 +03:00
main.c bcma: use module_init for the main part of bus initialization 2015-12-31 10:17:05 +02:00
Makefile bcma: prepare Kconfig symbol for PCI driver 2015-03-05 14:11:45 +02:00
README
scan.c bcma: use standard bus scanning during early register 2015-01-23 21:47:55 +02:00
scan.h
sprom.c bcma: detect SPROM revision 11 2015-01-29 10:49:28 +02:00
TODO

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.