GPIO and LED drivers were replaced by generic ones for DT boards. These drivers
were remaining: delete them now. Modifications are also done on the
corresponding header files.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
[nicolas.ferre@atmel.com: split patch]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Remove irc.c and associated header file. The related code was idendified by
the CONFIG_OLD_IRQ_AT91 option that was removed previously. It has been spotted
by following coccinelle semantic match:

@rule1@
expression E;
statement S;
@@
(
- if (IS_ENABLED(CONFIG_OLD_IRQ_AT91)) S
|
- if (IS_ENABLED(CONFIG_OLD_IRQ_AT91) && E) S
)

Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: NBoris BREZILLON <boris.brezillon@free-electrons.com>

Both the reset and poweroff drivers are now implementing what the
show_reset_status function used to do. Hence, we can remove this rather hackish
function that prevents us from doing further cleanup.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Enclose at91_aic_xx calls in IS_ENABLED(CONFIG_OLD_IRQ_AT91) blocks in
order to prepare migration to the new AIC driver.

In the new AIC driver the suspend/resume functions are called by the
generic irq framework and are no longer needed in the PM specific code.

Moreover, the new AIC driver no longer exposes the at91_aic_base variable
which is used by the at91_aic_read functions.
Signed-off-by: NBoris BREZILLON <boris.brezillon@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

This moves the <mach/gpio.h> header in the AT91 platform down
into the machine directory and removes the reliance on
MACH_NEED_GPIO_H from the AT91.

This does not move the platform to GENERIC_GPIO but localize
the remaining work to be done for this to the mach-at91
folder.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
[nicolas.ferre@atmel.com: adapt to newer kernel, add rsi-ews board]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

The platform specific <mach/timex.h> will be removed in a later patch.
So move its only still used symbol to a different header specific for
the only machine still using it. Also add a few explicit includes of
<mach/hardware.h> that are implicitly available through <mach/timex.h>.
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>

This AT91 specific Kconfig option removed the code that dealt with
programmable clocks. Each AT91 SoC embeds programmable clocks and
there is little gain to remove this code in case that such a clock
is not used.
If this option is not selected, it causes certain drivers to fail
to build. We simply remove this option instead of adding code just
to build a workaround.
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NKevin Hilman <khilman@linaro.org>

This patch moves at91_pmc.h header from machine specific directory
(arch/arm/mach-at91/include/mach/at91_pmc.h) to clk include directory
(include/linux/clk/at91_pmc.h).
We need this to avoid reference to machine specific headers in clk
drivers.
Signed-off-by: NBoris BREZILLON <b.brezillon@overkiz.com>
Acked-by: NFelipe Balbi <balbi@ti.com>
Acked-by: NMike Turquette <mturquette@linaro.org>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Using the platform driver model is a good way to separate the cpuidle specific
code from the low level pm code. It allows to remove the dependency between
these two components.

The platform_device is located in the pm code and a 'set' function has been
added to set the standby function from the AT91_SOC_START initialization
function. Each SoC with a cpuidle driver will set the standby function in the
platform_data field at init time. Then pm code will register the cpuidle
platform device.

The cpuidle driver will register the platform_driver and use the device's
platform_data as a standby callback in the idle path.

The at91_pm_enter function contains a { if then else } based on cpu_is_xx
similar to what was in cpuidle. This is considered dangerous when adding a new
SoC. Like the cpuidle driver, a standby ops is defined and assigned when the
SoC init function specifies what is its standby function and reused in the
at91_pm_enter's 'case' block.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Since 4b68520dc0ec96153bc0d87bca5ffba508edfcf
ARM: at91: add AIC5 support

we allocate the at91_extern_irq.

This patch makes it static and stores the non-dt extern irq in the soc
structure. It is then possible to use a at91_get_extern_irq() function
to get the value for outside of the irq driver. It is useful for passing
its value to at91_aic_init().
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NLudovic Desroches <ludovic.desroches@atmel.com>
[nicolas.ferre@atmel.com: rework commit message]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

For the past three years, we have had a #warning in
mach-at91 about the sdram_selfrefresh_enable or
at91sam9_standby functions possibly not working on
at91sam9263. In the meantime a function was added
to do the right thing on at91sam9g45, which looks like
it should also work on '9263.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
[nicolas.ferre@atmel.com: remove paragraph in commit message]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>

gpio suspend/resume and wakeup sources where not managed when using pinctrl so
it was impossible to wake up the system with a gpio.
Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>

This is only used by old boards style or via core code.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>

as this is only used board old style board old mach code
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>

The code using the variable 'i' in this function is conditional which
results in a harmless compiler warning. Using the IS_ENABLED macro
instead of #ifdef makes the code look nicer and gets rid of the
warning.

Without this patch, building at91sam9263_defconfig results in:

/home/arnd/linux-arm/arch/arm/mach-at91/pm.c: In function 'at91_pm_verify_clocks':
/home/arnd/linux-arm/arch/arm/mach-at91/pm.c:137:6: warning: unused variable 'i' [-Wunused-variable]
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>

Enable sparse irq support for multisoc image. It involves to add the
NR_IRQS_LEGACY offset to static SoC irq number definitions since NR_IRQS_LEGACY
irq descs are allocated before AIC requests irq descs allocation.
Move NR_AIC_IRQS macro to a more appropiate place with the purpose to
remove mach/irqs.h later.
Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
[nicolas.ferre@atmel.com: add cpuidle modification]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

We can now drop the call to ioremap_registers() as we have the binding for the
SDRAM/DDR Controller.

Drop ioremap_registers() for sam9x5 too.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NRob Herring <rob.herring@calxeda.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Reviewed-by: NRyan Mallon <rmallon@gmail.com>

This will allow to have all SoC in one kernel image.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>

This cleanup is done to allow to have multiple SoC in the same image.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Change slow_clock()/at91_slow_clock() prototype to accept the PMC
base address and one or two RAM controller addresses by parameters.
The r0, r1 and r2 registers are used differently and preserved during
function call.
Those values are defined in pm.c and slow_clock() function is called
from there with its new parameters.

This will allow to have a soc independent pm_slowclock.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Ached-by: NNicolas Ferre <nicolas.ferre@atmel.com>

This patch groups the self-refresh on/cpu_do_idle/self-refresh off into
a single 'standby' function.

The standby routine for rm9200 has been turned into an asm routine to have
a better control of the self refresh and to prevent a memory access when
running this code.

Draining the write buffer is done automatically when switching for the self
refresh on sam9, so the instruction is added to the rm9200 only.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

All the "wait_for_interrupt" definition are aliases to cpu_do_idle.
Only the rm9200 has an asm routine to switch to wfi. But the cpu_do_idle
for this platform has exactly the same asm routine.

arch/arm/mm/proc-arm920.S
..
ENTRY(cpu_arm920_do_idle)
        mcr     p15, 0, r0, c7, c0, 4           @ Wait for interrupt
..

Then it is safe to invoke cpu_do_idle for this platform. As all the
wait_for_interrupts are definition for cpu_do_idle, let's remove it
and replace its invokation by cpu_do_idle.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Following removal announce and addition to feature-removal-schedule.txt,
here is the actual source code deletion for Atmel CAP9 family.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>

on all at91 have the Advanced Interrupt Controller starts at address
0xfffff000
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Convert arch/arm includes of mach/gpio.h and asm/gpio.h to linux/gpio.h
before we start consolidating the individual platform implementations
of the gpio header files.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This allows us to move duplicated code in <asm/atomic.h>
(atomic_inc_not_zero() for now) to <linux/atomic.h>
Signed-off-by: NArun Sharma <asharma@fb.com>
Reviewed-by: NEric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: NMike Frysinger <vapier@gentoo.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

While at it, fix two checkpatch errors.
Several non-const struct instances constified by this patch were added after
the introduction of platform_suspend_ops in checkpatch.pl's list of "should
be const" structs (79404849).

Patch against mainline.
Inspired by hunks of the grsecurity patch, updated for newer kernels.
Signed-off-by: NLionel Debroux <lionel_debroux@yahoo.fr>
Acked-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

When using CP15 cache operations (c7), we make sure that Rd (r0)
is actually 0 as ARM 926 TRM is saying.
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

For power management at91_pm_enter() routine, use the cpu_do_idle() for a
rock solid "wait for interrupt" implementation.
For AT91SAM9 ARM 926 based chips, we can exceed the cache line length as
we can access RAM even while in self-refresh mode.
We keep plain access to CP15 for at91rm9200 as this feature is not
available: instructions have to be in a single cache line.
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

This patch adds the support for cpuidle on AT91 SoCs, taken from the
cpuidle support in mach-kirkwood.
cpuidle needs sdram_selfrefresh_enable and _disable, so move their
definition to a separate header file instead of duplicating the code
already used in pm.c.
Tested-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NAlbin Tonnerre <albin.tonnerre@free-electrons.com>
Acked-by: NAndrew Victor <linux@maxim.org.za>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

From: Hong Xu <hong.xu@atmel.com>

Here are the modification to at91sam9261 files dedicated to the support of
at91sam9g10. This direction has been adopted to minimize code duplication.

All at91sam9261 drivers are enabled in _devices and board- files. Modificaton
to peripherals that support at91sam9g10 will be added in future patches.
Signed-off-by: NHong Xu <hong.xu@atmel.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: NAndrew Victor <linux@maxim.org.za>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Change pr_debug to pr_err on error paths in the AT91 power management
code. All of the errors will result in the cpu not going into the
suspend state. This patch makes it possible to identify problems with
suspend when power management debugging is not enabled.
Signed-off-by: NRyan Mallon <ryan@bluewatersys.com>
Acked-by: NAndrew Victor <linux@maxim.org.za>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

We've discovered that our AT91SAM9260 board consumed too much power when
returning from a slowclock low-power mode.  RAM self-refresh is enabled in
a bootloader in our case, this is how we saw a difference.  Estimated ca.
30mA more on 4V battery than the same state before powersaving.

After a small research we found that there seems to be a bogus
sdram_selfrefresh_disable() call at the end of at91_pm_enter() call, which
overwrites the LPR register with uninitialized value.  Please find the
suggested patch attached.

This patch fixes correct restoring of LPR register of the Atmel AT91 SDRAM
controller when returning from a power saving mode.
Signed-off-by: NAndrei Birjukov <andrei.birjukov@artecdesign.ee>
Acked-by: NAndrew Victor <linux@maxim.org.za>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>