[PATCH] ARM: imx6: fix !CONFIG_PM and !CONFIG_CPU_IDLE build

[Shawn Guo]

Hi Lucas,

On Wed, Feb 12, 2014 at 11:45:48AM +0100, Lucas Stach wrote:
> When building a kernel with only CONFIG_CPU_IDLE, but no
> CONFIG_PM we still need the functions to set the lpm mode
> and chicken bits.
> 
> Also if both options are unset, we have to stub out the
> set_lpm function, as this one is called from the clk
> driver directly.
> 
> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
> ---
> This fix depends on an earlier one by Philipp:
> "ARM: imx6: Initialize low-power mode early again"
> 
> Both should go to stable after a sensible sinking time.
> ---
>  arch/arm/mach-imx/Makefile   |   9 +++-
>  arch/arm/mach-imx/common.h   |  11 +++--
>  arch/arm/mach-imx/pm-imx6q.c | 112 ++++++++++++++++++++++---------------------
>  3 files changed, 72 insertions(+), 60 deletions(-)

Since we already have so many stuff in pm-imx6q.c needed by a !CONFIG_PM
build, maybe we should build pm-imx6q.c without CONFIG_PM condition,
something like the following?

Shawn

---8<-----------

diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index befcaf5..ec41964 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -101,11 +101,9 @@ obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
 obj-$(CONFIG_SOC_IMX6Q) += clk-imx6q.o mach-imx6q.o
 obj-$(CONFIG_SOC_IMX6SL) += clk-imx6sl.o mach-imx6sl.o

-ifeq ($(CONFIG_PM),y)
 obj-$(CONFIG_SOC_IMX6Q) += pm-imx6q.o headsmp.o
 # i.MX6SL reuses i.MX6Q code
 obj-$(CONFIG_SOC_IMX6SL) += pm-imx6q.o headsmp.o
-endif

 # i.MX5 based machines
 obj-$(CONFIG_MACH_MX51_BABBAGE) += mach-mx51_babbage.o
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index 59c3b9b..baf439d 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -144,13 +144,11 @@ void imx6q_set_chicken_bit(void);
 void imx_cpu_die(unsigned int cpu);
 int imx_cpu_kill(unsigned int cpu);

-#ifdef CONFIG_PM
 void imx6q_pm_init(void);
 void imx6q_pm_set_ccm_base(void __iomem *base);
+#ifdef CONFIG_PM
 void imx5_pm_init(void);
 #else
-static inline void imx6q_pm_init(void) {}
-static inline void imx6q_pm_set_ccm_base(void __iomem *base) {}
 static inline void imx5_pm_init(void) {}
 #endif