linux-kernel - [PATCH v3 4/6] ARM: at91: handle CONFIG

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Date:   Wed, 31 May 2017 03:06:22 +0200
From:   Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:     Nicolas Ferre <nicolas.ferre@...rochip.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Szemző András <sza@....hu>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: [PATCH v3 4/6] ARM: at91: handle CONFIG_PM for armv7m configurations

There is currently no PM support for samx7 but the symbol can still be
selected. This avoids compilation issues.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
 arch/arm/mach-at91/Kconfig  | 6 ++++++
 arch/arm/mach-at91/Makefile | 3 +--
 arch/arm/mach-at91/samx7.c  | 9 +++++++++
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index bade64e0cb49..34fa561aa853 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -59,6 +59,7 @@ config SOC_AT91RM9200
 	bool "AT91RM9200"
 	depends on ARCH_MULTI_V4T
 	select ATMEL_AIC_IRQ
+	select ATMEL_PM if PM
 	select ATMEL_ST
 	select CPU_ARM920T
 	select HAVE_AT91_USB_CLK
@@ -72,6 +73,7 @@ config SOC_AT91SAM9
 	bool "AT91SAM9"
 	depends on ARCH_MULTI_V5
 	select ATMEL_AIC_IRQ
+	select ATMEL_PM if PM
 	select ATMEL_SDRAMC
 	select CPU_ARM926T
 	select HAVE_AT91_SMD
@@ -130,9 +132,13 @@ config SOC_SAM_V7
 config SOC_SAMA5
 	bool
 	select ATMEL_AIC5_IRQ
+	select ATMEL_PM if PM
 	select ATMEL_SDRAMC
 	select MEMORY
 	select SOC_SAM_V7
 	select SRAM if PM
 
+config ATMEL_PM
+	bool
+
 endif
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index 55a88c104e5d..1db023ad4dc0 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -9,8 +9,7 @@ obj-$(CONFIG_SOC_SAMA5)		+= sama5.o
 obj-$(CONFIG_SOC_SAMX7)		+= samx7.o
 
 # Power Management
-obj-$(CONFIG_PM)		+= pm.o
-obj-$(CONFIG_PM)		+= pm_suspend.o
+obj-$(CONFIG_ATMEL_PM)		+= pm.o pm_suspend.o
 
 ifeq ($(CONFIG_CPU_V7),y)
 AFLAGS_pm_suspend.o := -march=armv7-a
diff --git a/arch/arm/mach-at91/samx7.c b/arch/arm/mach-at91/samx7.c
index e2e7d153a7b9..24c40306714e 100644
--- a/arch/arm/mach-at91/samx7.c
+++ b/arch/arm/mach-at91/samx7.c
@@ -15,6 +15,15 @@
 #include <asm/system_misc.h>
 #include "generic.h"
 
+#ifdef CONFIG_PM
+/* This function has to be defined for various drivers that are using it */
+int at91_suspend_entering_slow_clock(void)
+{
+	return 0;
+}
+EXPORT_SYMBOL(at91_suspend_entering_slow_clock);
+#endif
+
 static const char *const samx7_dt_board_compat[] __initconst = {
 	"atmel,samx7",
 	NULL
-- 
2.11.0