renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-15 16:53:54 +08:00
Code
8100091d02
linux-next/drivers/bcma
History
Jia-Ju Bai 8100091d02 bcma: Replace mdelay with usleep_range in bcma_pmu_resources_init 
After checking all possible call chains to bcma_pmu_resources_init() here,
my tool finds that this function is never called in atomic context,
namely never in an interrupt handler or holding a spinlock.
Thus mdelay can be replaced with usleep_range to avoid busy wait.

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-02-27 15:52:13 +02:00
..
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 bcma: update core (en|dis)abling functions 2013-06-17 14:38:53 -04:00
driver_chipcommon_b.c bcma: define ChipCommon B MII registers 2016-07-19 21:13:10 +03:00
driver_chipcommon_nflash.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2013-02-14 14:23:33 -05:00
driver_chipcommon_pflash.c bcma: move parallel flash support to separated file 2016-03-07 14:41:08 +02:00
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 mtd: bcm47xxsflash: use ioremap_cache() instead of KSEG0ADDR() 2016-04-04 00:07:57 -07:00
driver_chipcommon.c Revert "bcma: init serial console directly from ChipCommon code" 2017-01-17 14:23:44 +02:00
driver_gmac_cmn.c Drivers: bcma: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
driver_gpio.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
driver_mips.c bcma: Use bcma_debug and not pr_cont in MIPS driver 2017-10-27 11:01:37 +03:00
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: Adjust block comment 2017-12-07 15:33:02 +02:00
host_pci.c bcma: add Dell Inspiron 3148 2016-11-29 17:35:14 +02:00
host_soc.c bcma: use standard bus scanning during early register 2015-01-23 21:47:55 +02:00
Kconfig bcma: Fix 'allmodconfig' and BCMA builds on MIPS targets 2018-01-16 21:13:55 +02:00
main.c bcma: fill core OF info independently of bus type 2017-03-20 19:12:01 +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
scan.c bcma: support chipsets with PMU and GCI cores (devices) 2016-02-06 13:34:51 +02:00
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 bcma: detect SPROM revision 11 2015-01-29 10:49:28 +02:00
TODO

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.