Simplify the power request code by passing an "on" flag, and picking the
right status bit and register offset in the innermost function, based on
this flag.
This allows to remove the rcar_sysc_pwr_{off,on}() helper functions, and
the function pointer through which they were called.
Make sr_bit and reg_offs unsigned while we're at it.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
The passed struct rcar_sysc_ch is never modified, so it can be const.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
rcar_sysc_update() loops (with interrupts disabled and while holding a
spinlock) until submitting a power shutoff or resume request fails, or
until the submitted request was accepted.
If none of these conditions becomes true, this forms an infinite loop.
Put a limit on the maximum number of loop iterations, and add a small
delay to each iteration, to fix this.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Add more SYSC register documentation.
Use definitions instead of hardcoded numbers.
Comment important operations.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Add a CONFIG_PM_RCAR entry and enable it for R-Car
Generation 1 or 2 in case CONFIG_PM or CONFIG_SMP
is set. Consolidate power management objects and
get rid of #ifdefs in the C code.
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Change location of pm-rcar.h so it can be used as #include "pm-rcar.h"
instead of the old style #include <mach/pm-rcar.h>. Also clean up
the r8a7779 case to move some unused header file cruft into a C
file.
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Move the rcar_sysc_base variable to inside #ifdefs to avoid
triggering build warnings in case PM or SMP is not selected.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Break out the R-Car SYSC power management code from
the r8a7779 SoC code. With this new shared R-Car SYSC
code base it is possible to hook in Generation 2 SoCs
as well.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
