The pwm hardware only checks the compare register after a decrement,
so the pin never toggles if tcmp = tcnt.
This happens when a very low duty cycle is requested. Fix it by always
ensuring that tcmp < tcnt.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
The commit ec976d6eb0
removed a number of gpio definitions from <mach/hardware.h>
but misssed updating these two files:
Fix the following build errors by including <linux/gpio.h>:
arch/arm/plat-s3c24xx/spi-bus1-gpg5_6_7.c: In function 's3c24xx_spi_gpiocfg_bus1_gpg5_6_7':
arch/arm/plat-s3c24xx/spi-bus1-gpg5_6_7.c:25: error: implicit declaration of function 's3c2410_gpio_cfgpin'
arch/arm/plat-s3c24xx/spi-bus1-gpg5_6_7.c:28: error: implicit declaration of function 's3c2410_gpio_pullup'
arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c: In function 's3c24xx_spi_gpiocfg_bus0_gpe11_12_13':
arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c:25: error: implicit declaration of function 's3c2410_gpio_cfgpin'
arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c:28: error: implicit declaration of function 's3c2410_gpio_pullup'
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
CONFIG_S3C24XX_PWM was defined in arch/arm/plat-s3c24xx/Kconfig but
not used anywhere else as the corresponding makefile used
CONFIG_HAVE_PWM (selected by CONFIG_S3C24XX_PWM) to compile the PWM
driver.
Change the makefile to use CONFIG_S3C24XX_PWM to compile this driver
to ensure it is only build when needed.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
The arch_initcall() is too late for board initialisation to use
gpiolib when doing their machine specific initilisation via the
.init_machine callback.
Bring the file into line with the s3c64xx implementation and use
the core_initcall() to register the GPIO chips.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Several GPIO functions have been returning -1 to indicate
an error instead of returning a proper error code. Change
to return -EINVAL for invalid argument(s).
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Prepare to remove the large number of S3C2410_GPxn defines
by moving to S3C2410_GPx(n) in arch/arm.
The following perl was used to change the files:
perl -pi~ -e 's/S3C2410_GP([A-Z])([0-9]+)([^_^0-9])/S3C2410_GP\1\(\2\)\3/g'
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
The S3C24XX_GPIO_BASE makes it difficult to compress the
GPIO number space, and is only used in a few places of
which everything outside arch/arm/plat-s3c24xx/gpiolib.c
will be removed as soon as possible.
Change gpiolib.c to use the S3C2410_GPxCON register addresses
as the base for each bank, thus eliminating S3C24XX_GPIO_BASE.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
In our recent changes, arch/arm/plat-s3c24xx/gpiolib.c needs
to have <linux/sysdev.h> included for it to build.
This fixes the following error/warnings:
arch/arm/plat-s3c/include/plat/pm.h:104: error: expected declaration specifiers or '...' before 'pm_message_t'
arch/arm/plat-s3c/include/plat/pm.h:104: warning: 'struct sys_device' declared inside parameter list
arch/arm/plat-s3c/include/plat/pm.h:104: warning: its scope is only this definition or declaration, which is probably not what you want
arch/arm/plat-s3c/include/plat/pm.h:105: warning: 'struct sys_device' declared inside parameter list
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Move all the gpio functions out of <mach/hardware.h> as
this file is for defining the generic IO base addresses
for the kernel IO calls.
Make a new header <mach/gpio-fns.h> to take this and
include it via the chain from <linux/gpio.h> which is
what most of these files should be using (and will be
changed as soon as possible).
Note, this does make minor changes to some drivers but
should not mess up any pending merges.
CC: Richard Purdie <rpurdie@rpsys.net>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
CC: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
The use of S3C2410_GP[A-Z]x_INP and S3C2410_GP[A-Z]x_OUTP are
very rare and are taking up large amounts of space in the
regs-gpio.h header.
The GPIO layer has had generic input and out defines called
S3C2410_GPIO_INPUT and S3C2410_GPIO_OUTPUT for a while which work
for all S3C24XX GPIOs.
Do the following replacements:
S3C2410_GP[A-Z][0-9]*_\OUTP => S3C2410_GPIO_OUTPUT
S3C2410_GP[A-Z][0-9]*_\INP => /S3C2410_GPIO_INPUT
S3C2410_GPA[0-9]*_OUT => S3C2410_GPIO_OUTPUT
to remove any usages of these and prepare the header for
the removal of these.
The following command was used to acheive this:
find . -type f -writable ! -name regs-gpio.h ! -name "*~" | xargs sed -i~ -e 's/S3C2410_GP[A-Z][0-9]*_\OUTP/S3C2410_GPIO_OUTPUT/g' -e 's/S3C2410_GP[A-Z][0-9]*_\INP/S3C2410_GPIO_INPUT/g' -e 's/S3C2410_GPA[0-9]*_OUT/S3C2410_GPIO_OUTPUT/g'
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Remove the s3c2410_gpio_irq2pin() function as it is not being
used in any in kernel driver and the function is probably not
being used anywhere else.
This is also part of the effort to remove any of the s3c24xx gpio
specific code that cannot be recreated by using the gpiolib
framework now in the kernel.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
convert callback
This patch allow us to efficiently modify the number of
remaining conversions from the client side. This us useful
when we do not know in advance how many conversions we will
need or when we need to cancel pending conversions.
This change is simple enough to be compatible with existing
code that can just define the new pointer in the callback
and ignore it.
Sample usage:
http://tinyurl.com/s3c2410-ts-c (function stylus_adc_action).
Signed-off-by: Nelson Castillo <arhuaco@freaks-unidos.net>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Fix unused code warning in arch/arm/plat-s3c24xx/dma.c if there
is no PM support enabled. The function to_dma_chan() should
be marked inline so that the compiler will eliminate it without
warning if it isn't used.
arch/arm/plat-s3c24xx/dma.c:1239: warning: 'to_dma_chan' defined but not used
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Move the GPIO suspend/resume support inline with the gpiolib support
so that it will work with both the S3C24XX and S3C64XX series.
The s3c_gpio_chip is extended to have a pm callback and a save block
to keep the state of the GPIO over suspend, and the code from the
s3c24xx implementation is added to a new common file.
The suspend process now uses the list of registered chips to go through
saving and restoring each one as appropriate, using the pm callback to
select the appropriate routine depending on the type of control register
present.
This change also means that any additional GPIO added should not require
changes to the PM.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Add a simple debug message on saving the UART state and add a per-arch
pre-restore function to be used by the s3c64xx restore code to ensure
the UARTs control registers do not go through any illegal state changes.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
The USB host base address is available on both the S3C24XX and S3C64XX
ranges.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Add common definition for USB OHCI platform device, add a Kconfig
to selectively compile it and add update all the users.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Change the name of S3C2410_DMA_CHANNELS to S3C_DMA_CHANNELS in the process.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
The <plat/dma-regs.h> pre-date the invention of the TAB character,
so fix the indentation of the register defines.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
The <mach/dma.h> is for the driver API for the DMA system and should
not have anything relying on the CPU specific registers.
Remove the registers to <plat/dma-regs.h> for the code that really
needs to know about them.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
calls
The S3C24XX DMA API channel configuration registers are being passed
values comprised of register values which makes it hard to move the
API to cover both the S3C24XX and S3C64XX.
These values can be calculated from knowing which device the channel
is connected to, so remove them from the two calls s3c2410_dma_config
and s3c2410_dma_devconfig.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Move the platform dma.h to dma-plat.h to ensure it doen't get
confused with plat/dma.h
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Check pending queue and remove the adc client being released.
Signed-off-by: Ramax Lo <ramaxlo@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
The symbol 's3c_adc_try' in arch/arm/plat-s3c24xx/adc.c
does not need to be exported and thus should be static.
This fixes the following sparse warning:
adc.c:103:6: warning: symbol 's3c_adc_try' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Fix the following sparse error generated by including
<plat/gpio-core.h> instead of <mach/gpio-core.h>
gpiolib.c:78:22: warning: symbol 's3c24xx_gpios' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
OMAP wishes to pass state to the boot loader upon reboot in order to
instruct it whether to wait for USB-based reflashing or not. There is
already a facility to do this via the reboot() syscall, except we ignore
the string passed to machine_restart().
This patch fixes things to pass this string to arch_reset(). This means
that we keep the reboot mode limited to telling the kernel _how_ to
perform the reboot which should be independent of what we request the
boot loader to do.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
As noted by Russell King, the sleep code path is not
elegant and makes use of leaving items on the stack
between calls.
Change the code that does the following:
if (s3c_cpu_save(regs_save) == 0) {
flush_cache_all();
S3C_PMDBG("preparing to sleep\n");
pm_cpu_sleep();
}
to simply call s3c_cpu_save, and let that do the
necessary calls to quiesce and sleep the system.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Change the way the UART state is saved over suspend to allow the s3c64xx
code to modify the settings on resume to avoid any illegal state changes
to the UART clocks. This will also allow us to save the UDIVSLOT register
on newer SoCs.
Move to using a structure for the UART use the extant Kconfig configuration
specifying the number of UARTs.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Rename s3c2410_cpu_resume to s3c_cpu_resume and s3c2410_cpu_save to
s3c_cpu_save to remove the CPU specific naming of these functions
which are now in the generic PM code.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Since we have moved a large proportion of the PM code to the common
support area, remove the cpu specific name from the initialisation
function.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Move the IRQ_EINT sleep control to be available to all
s3c impelmentations. Since s3c_irqext_wake is not large,
place it in arch/arm/plat-s3c/pm.c as adding it to a new
file would be a waste of compile time.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Split the PM code out of arch/arm/plat-s3c24xx/irq.c to
remove some of the #ifdefs being used. Also fix a couple
of places where the absecnce of a function was redefined
to the same thing.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Split the optional memory check code out of the pm.c file
as it is quite a big #ifdef block and as-such can be moved
out and simply compiled when the configuration is set.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Start moving the PM code by moving all the common support functions
to a common location in arch/arm/plat-s3c. With the move we rename
the functions from s3cxxx_ to s3c_ to fit the new location.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Move the <plat/pm.h> header to plat-s3c as preparation
for moving parts of the s3c24xx pm support which are
common into the plat-s3c support.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Move the IIS headers to their correct place.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
arch/arm/mach-at91/at91cap9.c:337: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91rm9200.c:301: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9260.c:351: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9261.c:287: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9263.c:312: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-at91/at91sam9rl.c:304: error: 'NR_AIC_IRQS' undeclared here (not in a function)
arch/arm/mach-h720x/h7202-eval.c:38: error: implicit declaration of function 'IRQ_CHAINED_GPIOB'
arch/arm/mach-ks8695/devices.c:46: error: 'KS8695_IRQ_WAN_RX_STATUS' undeclared here (not in a function)
arch/arm/mach-msm/devices.c:28: error: 'INT_UART1' undeclared here (not in a function)
arch/arm/mach-mx2/devices.c:233: error: 'MXC_GPIO_IRQ_START' undeclared here (not in a function)
arch/arm/mach-mx3/devices.c:128: error: 'MXC_GPIO_IRQ_START' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:140: error: 'INT_730_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:165: error: 'INT_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap1/mcbsp.c:200: error: 'INT_McBSP1RX' undeclared here (not in a function)
arch/arm/mach-omap2/board-apollon.c:286: error: implicit declaration of function 'omap_set_gpio_direction'
arch/arm/mach-omap2/mcbsp.c:154: error: 'INT_24XX_MCBSP1_IRQ_RX' undeclared here (not in a function)
arch/arm/mach-omap2/mcbsp.c:181: error: 'INT_24XX_MCBSP1_IRQ_RX' undeclared here (not in a function)
arch/arm/mach-pxa/e350.c:36: error: 'IRQ_BOARD_START' undeclared here (not in a function)
arch/arm/plat-s3c/dev-i2c0.c:32: error: 'IRQ_IIC' undeclared here (not in a function)
...
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
As per Russell King's last review comment, find and remove
all unnecessary includes of <linux/delay.h> in the files
that do not need them.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Add the fourth UART definition for the S3C2443, and at the
same time fixup the problems caused by the enlarging of the
UART array in the previous commits.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
