clk: add common of_clk_init() function

Modify of_clk_init function so that it will determine which
driver to initialize based on device tree instead of each driver
registering to it.

Based on a similar patch for drivers/irqchip by Thomas Petazzoni and
drivers/clocksource by Stephen Warren.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Tested-by: Tony Prisk <linux@prisktech.co.nz>
Tested-by: Pawel Moll <pawel.moll@arm.com>
Tested-by: Rob Herring <rob.herring@calxeda.com>
Tested-by: Josh Cartwright <josh.cartwright@ni.com>
Reviewed-by: Josh Cartwright <josh.cartwright@ni.com>
Acked-by: Maxime Ripard <maxime.ripard@anandra.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: merge conflict from missing CLKSRC_OF_TABLES()]

Signed-off-by: Mike Turquette <mturquette@linaro.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index d1ea7ce0b4cb..c1fe60ad1540 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -150,6 +150,15 @@
 #endif
 
 
+#ifdef CONFIG_COMMON_CLK
+#define CLK_OF_TABLES() . = ALIGN(8);                           \
+                        VMLINUX_SYMBOL(__clk_of_table) = .;     \
+                        *(__clk_of_table)                       \
+                        *(__clk_of_table_end)
+#else
+#define CLK_OF_TABLES()
+#endif
+
 #define KERNEL_DTB()                                                    \
         STRUCT_ALIGN();                                                 \
         VMLINUX_SYMBOL(__dtb_start) = .;                                \
@@ -493,6 +502,7 @@
         DEV_DISCARD(init.rodata)                                        \
         CPU_DISCARD(init.rodata)                                        \
         MEM_DISCARD(init.rodata)                                        \
+        CLK_OF_TABLES()                                                 \
         KERNEL_DTB()
 
 #define INIT_TEXT                                                       \