This diver doesn't applies only on SAM9 SoC families but on SAMA5 families
as well.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Commit dca1a4b5ff ("clk: at91: keep slow clk enabled to prevent system
hang") added a workaround for the slow clock as it is not properly handled
by its users.
Get and use the slow clock as it is necessary for the at91 reset
controller.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
It was not possible to compile at91-reset as a module. Implement .remove()
to allow it. Also switch to module_platform_driver_probe() as it is not
hotpluggable.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Since all the at91 platforms are now DT only, at91_reset_platform_probe()
is now useless, remove it.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This patch introduces a new compatible string: "atmel,sama5d3-rstc" and
new reset function for sama5d3 and later chips.
As in sama5d3 or later chips, we don't have to shutdown the DDR
controller before reset. Shutdown the DDR controller before reset is a
workaround to avoid DDR signal driving the bus, but since sama5d3 and
later chips there is no such a conflict.
So in this patch:
1. the sama5d3 reset function only need to write the rstc register
and return.
2. we can remove the code related with sama5d3 DDR controller as
we don't use it at all.
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
The platform_device_id is not modified by the driver and core uses it as
const.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
In case of error, the function devm_ioremap() returns NULL
not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.
Fixes: ecfe64d8c5 ("power: reset: Add AT91 reset driver")
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Fix the passing of big endian data to routines that will be writing
it to the bus in the wrong order.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)
Signed-off-by: Fabian Frederick <fabf@skynet.be>
[for vexpress]
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Register with kernel restart handler instead of setting arm_pm_restart
directly. Register with high priority since the driver unconditionally
overwrites other restart handlers if instantiated.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Move the (DDR) SDRAM controller headers to include/soc/at91 to remove the
dependency on mach/ headers from the at91-reset driver.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
In the case of at91sam9g45_restart(), the driver is writing
AT91_DDRSDRC_LPCB_POWER_DOWN to AT91_DDRSDRC_RTR, this should actually be
AT91_DDRSDRC_LPR.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Implement the reset behaviour of the various AT91 SoCS in drivers/power/reset.
It used to be (and still is) located in arch/arm/mach-at91, and in order to
preserve bisectability is not removed yet, but every board should be converted
to use this driver instead.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Nicolas Ferre