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memory: fix build when CONFIG_OF && !CONFIG_DDR 

Commit e6b42eb "memory: emif: add device tree support to emif driver"
added drivers/memory/of_memory.c, which references tables defined in
lib/jedec_ddr_data.c. of_memory.c is compiled when CONFIG_OF, whereas
jedec_ddr_data.c is compiled when CONFIG_DDR. This breaks the build
when CONFIG_OF is defined but not CONFIG_DDR:

drivers/built-in.o: In function `of_get_ddr_timings':
drivers/memory/of_memory.c:138: undefined reference to `lpddr2_jedec_timings'
drivers/built-in.o: In function `of_get_min_tck':
drivers/memory/of_memory.c:62: undefined reference to `lpddr2_jedec_min_tck'
make: *** [vmlinux] Error 1

To solve this, only compile of_memory.c when CONFIG_OF && CONFIG_DDR,
otherwise, stub out the functions.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stephen Warren 2012-09-05 12:29:23 -06:00 committed by Greg Kroah-Hartman
parent e6b42eb6a6
commit 7c304d7e24
2 changed files with 4 additions and 2 deletions
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2
drivers/memory/Makefile
View File

@ -2,7 +2,9 @@
# Makefile for memory devices
#
ifeq ($(CONFIG_DDR),y)
obj-$(CONFIG_OF) += of_memory.o
endif
obj-$(CONFIG_TI_EMIF) += emif.o
obj-$(CONFIG_TEGRA20_MC) += tegra20-mc.o
obj-$(CONFIG_TEGRA30_MC) += tegra30-mc.o

4
drivers/memory/of_memory.h
View File

@ -12,7 +12,7 @@
#ifndef __LINUX_MEMORY_OF_REG_H
#define __LINUX_MEMORY_OF_REG_H
#ifdef CONFIG_OF
#if defined(CONFIG_OF) && defined(CONFIG_DDR)
extern const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
struct device *dev);
extern const struct lpddr2_timings
@ -31,6 +31,6 @@ static inline const struct lpddr2_timings
{
return NULL;
}
#endif /* CONFIG_OF */
#endif /* CONFIG_OF && CONFIG_DDR */
#endif /* __LINUX_MEMORY_OF_REG_ */