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drivers: sh: compile drivers/sh/pm_runtime.c if ARCH_SHMOBILE_MULTI 

If the kernel is built to support multi-ARM configuration with shmobile
support built in, then drivers/sh is not built. This contains the PM
runtime code in drivers/sh/pm_runtime.c, which implicitly enables the
module clocks for all devices, and thus is quite essential.
Without this, the state of clocks depends on implicit reset state, or on
the bootloader.

If ARCH_SHMOBILE_MULTI then build the drivers/sh directory, but ensure that
bits that may conflict (drivers/sh/clk if the common clock framework is
enabled) or are not used (drivers/sh/intc), are not built.
Also, only enable the PM runtime code when actually running on a shmobile
SoCs that needs it.

ARCH_SHMOBILE_MULTI was added a while ago by commit
efacfce5f8 ("ARM: shmobile: Introduce
ARCH_SHMOBILE_MULTI"), but drivers/sh was compiled for both
ARCH_SHMOBILE_LEGACY and ARCH_SHMOBILE_MULTI until commit
bf98c1eac1 ("ARM: Rename ARCH_SHMOBILE to
ARCH_SHMOBILE_LEGACY").

Inspired by a patch from Ben Dooks <ben.dooks@codethink.co.uk>.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
hifive-unleashed-5.1
Geert Uytterhoeven 2014-05-06 23:26:19 +02:00 committed by Simon Horman
parent c9eaa447e7
commit 3c90c55dcd
3 changed files with 28 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/Makefile
View File

@ -119,7 +119,7 @@ obj-$(CONFIG_SGI_SN) += sn/
obj-y += firmware/
obj-$(CONFIG_CRYPTO) += crypto/
obj-$(CONFIG_SUPERH) += sh/
obj-$(CONFIG_ARCH_SHMOBILE_LEGACY) += sh/
obj-$(CONFIG_ARCH_SHMOBILE) += sh/
ifndef CONFIG_ARCH_USES_GETTIMEOFFSET
obj-y += clocksource/
endif

14
drivers/sh/Makefile
View File

@ -1,10 +1,12 @@
#
# Makefile for the SuperH specific drivers.
#
obj-y := intc/
obj-$(CONFIG_SUPERH) += intc/
obj-$(CONFIG_ARCH_SHMOBILE_LEGACY) += intc/
ifneq ($(CONFIG_COMMON_CLK),y)
obj-$(CONFIG_HAVE_CLK) += clk/
endif
obj-$(CONFIG_MAPLE) += maple/
obj-$(CONFIG_SUPERHYWAY) += superhyway/
obj-$(CONFIG_HAVE_CLK) += clk/
obj-$(CONFIG_MAPLE) += maple/
obj-$(CONFIG_SUPERHYWAY) += superhyway/
obj-y += pm_runtime.o
obj-y += pm_runtime.o

20
drivers/sh/pm_runtime.c
View File

@ -50,8 +50,25 @@ static struct pm_clk_notifier_block platform_bus_notifier = {
.con_ids = { NULL, },
};
static bool default_pm_on;
static int __init sh_pm_runtime_init(void)
{
if (IS_ENABLED(CONFIG_ARCH_SHMOBILE_MULTI)) {
if (!of_machine_is_compatible("renesas,emev2") &&
!of_machine_is_compatible("renesas,r7s72100") &&
!of_machine_is_compatible("renesas,r8a73a4") &&
!of_machine_is_compatible("renesas,r8a7740") &&
!of_machine_is_compatible("renesas,r8a7778") &&
!of_machine_is_compatible("renesas,r8a7779") &&
!of_machine_is_compatible("renesas,r8a7790") &&
!of_machine_is_compatible("renesas,r8a7791") &&
!of_machine_is_compatible("renesas,sh7372") &&
!of_machine_is_compatible("renesas,sh73a0"))
return 0;
}
default_pm_on = true;
pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
return 0;
}
@ -59,7 +76,8 @@ core_initcall(sh_pm_runtime_init);
static int __init sh_pm_runtime_late_init(void)
{
pm_genpd_poweroff_unused();
if (default_pm_on)
pm_genpd_poweroff_unused();
return 0;
}
late_initcall(sh_pm_runtime_late_init);