The commit 9bf448c66d ("ARM: pxa: use generic gpio operation instead of
gpio register") from Oct 17, 2011, leads to the following static checker
warning:
arch/arm/mach-pxa/spitz_pm.c:172 spitz_charger_wakeup()
warn: double left shift '!gpio_get_value(SPITZ_GPIO_KEY_INT)
<< (1 << ((SPITZ_GPIO_KEY_INT) & 31))'
As Dan reported, the value is shifted three times :
- once by gpio_get_value(), which returns either 0 or BIT(gpio)
- once by the shift operation '<<'
- a last time by GPIO_bit(gpio) which is BIT(gpio)
Therefore the calculation lead to a chained or operator of :
- (1 << gpio) << (1 << gpio) = (2^gpio)^gpio = 2 ^ (gpio * gpio)
It is be sheer luck the former statement works, only because each gpio
used is strictly smaller than 6, and therefore 2^(gpio^2) never
overflows a 32 bits value, and because it is used as a boolean value to
check a gpio activation.
As the xxx_charger_wakeup() functions are used as a true/false detection
mechanism, take that opportunity to change their prototypes from integer
return value to boolean one.
Fixes: 9bf448c66d ("ARM: pxa: use generic gpio operation instead of
gpio register")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Lots of header files are never included outside of a mach-pxa
directory and do not need to be made visible in include/mach,
so let's just move them all down one level.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
CONFIG_HOTPLUG is going away as an option. As a result, the __dev*
markings need to be removed.
This change removes the use of __devinit, __devexit_p, __devinitdata,
and __devexit from these drivers.
Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.
Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Devices that use spitz_pm.c will fail to resume
from STR (Suspend To Ram) when the charger plug is inserted
or removed when a device is in STR mode. The culprit is
a misconfigured gpio line - GPIO18. GPIO18 should be configured as a
regular GPIO input but it gets configured as an alternate function
GPIO18_RDY. And then later in postsuspend() it gets configured as
a regular GPIO18 input line.
Fix this by removing the GPIO18_RDY configuration so that GPIO18
only gets configured as a regular gpio input.
Signed-off-by: Marko Katic <dromede@gmail.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
(~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 &
GPIO_bit(SPITZ_GPIO_SYNC));
After using gpio_get_value, the statement should be in below.
((!gpio_get_value(SPITZ_GPIO_KEY_INT)
<< GPIO_bit(SPITZ_GPIO_KEY_INT))
| gpio_get_value(SPITZ_GPIO_SYNC));
Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
arch/arm/mach-pxa/spitz_pm.c: In function ‘spitz_presuspend’:
arch/arm/mach-pxa/spitz_pm.c:112:2: error: implicit declaration of
function ‘GPIO_bit’
make[1]: *** [arch/arm/mach-pxa/spitz_pm.o] Error 1
GPIO_bit() is moved into <linux/gpio-pxa.h>.
Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Some files use GPIOF_ macros but don't include the header file
for them. These macros are being moved to <linux/gpio.h>, so add
includes for <linux/gpio.h> where needed.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
READ_GPIO_BIT() is no way generic by accessing GPIO registers directly,
replace it with gpio_get_value().
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
BACKLIGHT_CORGI was later renamed to BACKLIGHT_GENERIC and has not been
used since then. As it's now safe to completely transition to LCD_CORGI
driver, which incorprates both the LCD and backlight device.
Signed-off-by: Christoph Egger <siccegge@cs.fau.de>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
REVISIT: change to GPIO18 is ugly, need to make sure whether that's
really necessary - GPIO18_RDY as an VLIO input signal - we don't
normally need to do such kind of trick during low power mode.
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Battery power levels are shared between spitz and corgi, rename
variable to reflect it.
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This fixes checkpatch/style problems in sharpsl_pm.c, allowing me to
submit real fixes next.
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
As pxa now is the only user of sharpsl_pm we can drop several startup
functions into generic code thus dropping several global functions.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
The remaining registers are separated into:
- <mach/regs-ost.h>
- <mach/regs-rtc.h>
- <mach/regs-intc.h>
and then we can remove pxa-regs.h completely. Instead of #include this
file, let's:
1. include the specific <mach/regs-*.h> with care (if that's absolutely
necessary)
2. define the registers in the driver, make cleanly defined API to expose
the register access to external with sufficient reason
Signed-off-by: Eric Miao <eric.miao@marvell.com>
corgi_lcd has symbol conflict with corgi_bl driver.
Fix it by renaming common symbol in new corgi_lcd driver.
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Original patch from Dmitry Baryshkov's inital scoop gpio conversion
work at http://git.infradead.org/users/dbaryshkov/zaurus-2.6.git.
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Remove includes of asm/hardware.h in addition to asm/arch/hardware.h.
Then, since asm/hardware.h only exists to include asm/arch/hardware.h,
update everything to directly include asm/arch/hardware.h and remove
asm/hardware.h.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Acked-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
If CONFIG_BACKLIGHT_CORGI is not selected, then corgibl_limit_intensity()
is not present. However, both corgi_pm.c and sharp_pm.c reference this
symbol, resulting in a link error.
Wrap the references with the relevant ifdefs, and avoid the resulting
NULL pointer dereference by making the code in sharpsl_pm.c also
conditional on the config symbol.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Related to d3930614e6.
RCSR is only present on PXA2xx CPUs, not on PXA3xx CPUs. Therefore,
we should not be unconditionally writing to RCSR from generic code.
Since we now clear the RCSR status from the SoC specific PXA PM code
and before reset in the arch_reset() function, the duplication in
the corgi, poodle, spitz and tosa code can be removed.
Acked-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
two reasons:
1. GPIO namings and their mode definitions are conceptually not part
of the PXA register definitions
2. this is actually a temporary move in the transition of PXA2xx to
use MFP-alike APIs (as what PXA3xx is now doing), so that legacy
code will still work and new code can be added in step by step
Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Richard Purdie
Abstract some machine specific parameters from the sharpsl_pm core
into the machine specific drivers. This allows the core to support
tosa/poodle.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Richard Purdie
Fix a gcc4 build error (incomplete element type) in the pxa SharpSL
PM code.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Richard Purdie
This patch moves a large chunk of the sharpsl_pm driver to
arch/arm/common so that it can be reused on other devices such as the
SL-5500 (collie). It also abstracts some functions from the core into
the machine and platform specific parts of the driver to aid reuse.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Richard Purdie
Add a SharpSL PM device driver for the SL-Cxx00 machines.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
