ARM: OMAP: Enable OneNAND driver to build as a module

[linux-2.6-omap-h63xx.git] / arch / arm / mach-omap2 / gpmc.c

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index da7409e2e7329d2526af115a31aa1fed0462cad3..da3cf90d9617f1a1a08299d7f8baad2766cfea12 100644 (file)
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -15,6 +15,7 @@
 #include <linux/clk.h>
 #include <linux/ioport.h>
 #include <linux/spinlock.h>
+#include <linux/module.h>
 
 #include <asm/io.h>
 #include <asm/mach-types.h>
@@ -24,7 +25,7 @@
 
 #if defined(CONFIG_ARCH_OMAP2420)
 #define GPMC_BASE              0x6800a000
-#elif defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430)
+#elif defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP34XX)
 #define GPMC_BASE              0x6e000000
 #endif
 
@@ -94,8 +95,17 @@ u32 gpmc_cs_read_reg(int cs, int idx)
 /* TODO: Add support for gpmc_fck to clock framework and use it */
 unsigned long gpmc_get_fclk_period(void)
 {
-       /* In picoseconds */
-       return 1000000000 / ((clk_get_rate(gpmc_l3_clk)) / 1000);
+       unsigned long rate = clk_get_rate(gpmc_l3_clk);
+
+       if (rate == 0) {
+               printk(KERN_WARNING "gpmc_l3_clk no enabled\n");
+               return 0;
+       }
+
+       rate /= 1000;
+       rate = 1000000000 / rate;       /* In picoseconds */
+
+       return rate;
 }
 
 unsigned int gpmc_ns_to_ticks(unsigned int time_ns)
@@ -108,6 +118,11 @@ unsigned int gpmc_ns_to_ticks(unsigned int time_ns)
        return (time_ns * 1000 + tick_ps - 1) / tick_ps;
 }
 
+unsigned int gpmc_ticks_to_ns(unsigned int ticks)
+{
+       return ticks * gpmc_get_fclk_period() / 1000;
+}
+
 unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns)
 {
        unsigned long ticks = gpmc_ns_to_ticks(time_ns);
@@ -348,6 +363,7 @@ out:
        spin_unlock(&gpmc_mem_lock);
        return r;
 }
+EXPORT_SYMBOL(gpmc_cs_request);
 
 void gpmc_cs_free(int cs)
 {
@@ -363,6 +379,7 @@ void gpmc_cs_free(int cs)
        gpmc_cs_set_reserved(cs, 0);
        spin_unlock(&gpmc_mem_lock);
 }
+EXPORT_SYMBOL(gpmc_cs_free);
 
 void __init gpmc_mem_init(void)
 {