linux-stable.git/arch/powerpc/sysdev/qe_lib, branch linux-2.6.31.y

powerpc: Don't use alloc_bootmem() in init_IRQ() path

2009-07-08T03:50:25+00:00

This patch fixes various badnesses like this for all interrupt
controllers:

------------[ cut here ]------------
Badness at c04db9dc [verbose debug info unavailable]
NIP: c04db9dc LR: c04db9ac CTR: 00000000
REGS: c053de30 TRAP: 0700   Not tainted  (2.6.31-rc1-00432-ge69b2b5-dirty)
MSR: 00021000   CR: 22020084  XER: 00000000
TASK = c0500480[0] 'swapper' THREAD: c053c000
GPR00: 00000001 c053dee0 c0500480 00000000 00000050 00000020 3fffffff 00000000
GPR08: 00000001 c0540000 e0080080 00000000 22000084 64183600 3ff8f800 00000000
GPR16: 841b0240 449a0303 00000000 00000000 00000000 00000000 00000000 c04f5bf4
GPR24: 00000000 00000000 00000000 00000050 00000020 00000000 3fffffff 00000050
NIP [c04db9dc] alloc_arch_preferred_bootmem+0x48/0x74
LR [c04db9ac] alloc_arch_preferred_bootmem+0x18/0x74
Call Trace:
[c053dee0] [c000a5a4] __of_address_to_resource+0x44/0xd0 (unreliable)
[c053def0] [c04dba58] ___alloc_bootmem_nopanic+0x50/0x108
[c053df20] [c04dbb28] ___alloc_bootmem+0x18/0x50
[c053df30] [c04d5de0] qe_ic_init+0x5c/0x1b0
[c053df70] [c04d77b0] mpc85xx_mds_pic_init+0xb8/0x10c
[c053dfb0] [c04cf374] init_IRQ+0x28/0x3c

p.s. commit 85355bb272db31a3f2dd99d547eef794805e1319 ("powerpc: Fix
mpic alloc warning") missed some alloc_bootmem() instances, this is
now fixed.

Signed-off-by: Anton Vorontsov 
Acked-by: Timur Tabi 
Signed-off-by: Benjamin Herrenschmidt

powerpc/qe: add polling timeout to qe_issue_cmd()

2009-06-23T13:09:41+00:00

The qe_issue_cmd() function (Freescale PowerPC QUICC Engine library) polls
on a register until a status bit changes, but does not include a timeout
to handle the situation if the bit never changes.  Change the code to use
the new spin_event_timeout() macro, which simplifies polling on a register
without a timeout.

Signed-off-by: Timur Tabi 
Signed-off-by: Kumar Gala

powerpc/qe: update QE Serial Number

2009-05-19T05:50:24+00:00

The latest QE chip may have more Serial Number(SNUM)s of thread to use. We
will get the number of SNUMs from device tree by reading the new property
"fsl,qe-num-snums", and set 28 as the default number of SNUMs so that it is
compatible with the old QE chips' device trees which don't have this new
property. The macro QE_NUM_OF_SNUM is defined as the maximum number in QE
snum table which is 256.

Also we update the snum_init[] array with 18 more new SNUMs which are
confirmed to be useful on new chip.

Signed-off-by: Haiying Wang 
Acked-by: Timur Tabi 
Signed-off-by: Kumar Gala

powerpc/qe: update risc allocation for QE

2009-05-19T05:50:22+00:00

Change the RISC allocation to macros instead of enum, add function to read
the number of risc engines from the new property "fsl,qe-num-riscs" under
the qe node in dts. Add new property "fsl,qe-num-riscs" description in
qe.txt

Signed-off-by: Haiying Wang 
Acked-by: Timur Tabi 
Signed-off-by: Kumar Gala

powerpc/qe: Select QE_USB with USB_GADGET_FSL_QE

2008-12-30T18:12:12+00:00

Boards should know when QE_USB is used, so that they can configure USB
clocks and pins.

Another option would be to add 'select QE_USB' into USB_GADGET_FSL_QE,
but selects are evil since they don't support dependencies.

While at it, also remove 'host' from the symbol description, since the
QE_USB code is used to support the gadget driver as well.

Signed-off-by: Anton Vorontsov 
Signed-off-by: Kumar Gala

powerpc/qe: Implement QE Pin Multiplexing API

2008-12-30T17:13:43+00:00

With this API we're able to set a QE pin to the GPIO mode or a dedicated
peripheral function.

The API relies on the fact that QE gpio controllers are registered. If
they aren't, the API won't work (gracefully though).

There is one caveat though: if anybody occupied the node->data before us,
or overwrote it, then bad things will happen. Luckily this is all in the
platform code that we fully control, so this should never happen.

I could implement more checks (for example we could create a list of
successfully registered QE controllers, and compare the node->data in the
qe_pin_request()), but this is unneeded if nobody is going to do silly
things behind our back.

Signed-off-by: Anton Vorontsov 
Signed-off-by: Kumar Gala

powerpc/qe: Move cmxgcr_lock definition from the ucc.c into the qe.c

2008-12-03T16:47:36+00:00

With this patch we can compile the qe_lib/usb.c without the UCC
support (that is, without UCC_GETH and/or SERIAL_QE).

Fixes following link error (CONFIG_SMP should be =y to trigger this):

arch/powerpc/sysdev/built-in.o: In function `qe_usb_clock_set':
(.text+0x3cae): undefined reference to `cmxgcr_lock'
make: *** [.tmp_vmlinux1] Error 1

While at it, also add missing spinlock.h includes.

Signed-off-by: Anton Vorontsov 
Acked-By: Timur Tabi 
Signed-off-by: Kumar Gala

powerpc/QE: move QE_GPIO Kconfig symbol into the platforms/Kconfig

2008-10-13T16:09:58+00:00

Specifying user-selectable option in the qe_lib/Kconfig was a bad idea
because the qe_lib/Kconfig is included into the top level Kconfig, and
thus the QE_GPIO option appears at the top level menu.

This patch effectively moves the QE_GPIO option under the platform menu
instead.

Signed-off-by: Anton Vorontsov 
Signed-off-by: Kumar Gala

powerpc: fix memory leaks in QE library

2008-08-21T04:58:12+00:00

Fix two memory leaks in the Freescale QE library: add a missing kfree() in
ucc_fast_init() and ucc_slow_init() if the ioremap() fails, and update
ucc_fast_free() and ucc_slow_free() to call iounmap() if necessary.

Based on a patch from Tony Breeds .

Signed-off-by: Timur Tabi 
Signed-off-by: Kumar Gala

gpiolib: allow user-selection

2008-07-25T17:53:30+00:00

This patch adds functionality to the gpio-lib subsystem to make it
possible to enable the gpio-lib code even if the architecture code didn't
request to get it built in.

The archtitecture code does still need to implement the gpiolib accessor
functions in its asm/gpio.h file.  This patch adds the implementations for
x86 and PPC.

With these changes it is possible to run generic GPIO expansion cards on
every architecture that implements the trivial wrapper functions.  Support
for more architectures can easily be added.

Signed-off-by: Michael Buesch 
Cc: Benjamin Herrenschmidt 
Cc: Stephen Rothwell 
Cc: David Brownell 
Cc: Russell King 
Cc: Haavard Skinnemoen 
Cc: Jesper Nilsson 
Cc: Ralf Baechle 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: Jean Delvare 
Cc: Samuel Ortiz 
Cc: Kumar Gala 
Cc: Sam Ravnborg 
Cc: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds