ARM: OMAP2+: gpmc: Print error message in set_gpmc_timing_reg()
Simplify set_gpmc_timing_reg() and always print error message
if the requested timing cannot be achieved due to a too fast
GPMC functional clock, irrespective if whether DEBUG is defined
or not. This should help us debug timing configuration issues,
which were otherwise simply not being displayed in the kernel log.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 5fa3755..45f680f 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -283,13 +283,8 @@
p->cycle2cyclediffcsen);
}
-#ifdef DEBUG
static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
int time, const char *name)
-#else
-static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
- int time)
-#endif
{
u32 l;
int ticks, mask, nr_bits;
@@ -299,15 +294,15 @@
else
ticks = gpmc_ns_to_ticks(time);
nr_bits = end_bit - st_bit + 1;
- if (ticks >= 1 << nr_bits) {
-#ifdef DEBUG
- printk(KERN_INFO "GPMC CS%d: %-10s* %3d ns, %3d ticks >= %d\n",
- cs, name, time, ticks, 1 << nr_bits);
-#endif
+ mask = (1 << nr_bits) - 1;
+
+ if (ticks > mask) {
+ pr_err("%s: GPMC error! CS%d: %s: %d ns, %d ticks > %d\n",
+ __func__, cs, name, time, ticks, mask);
+
return -1;
}
- mask = (1 << nr_bits) - 1;
l = gpmc_cs_read_reg(cs, reg);
#ifdef DEBUG
printk(KERN_INFO
@@ -322,16 +317,10 @@
return 0;
}
-#ifdef DEBUG
#define GPMC_SET_ONE(reg, st, end, field) \
if (set_gpmc_timing_reg(cs, (reg), (st), (end), \
t->field, #field) < 0) \
return -1
-#else
-#define GPMC_SET_ONE(reg, st, end, field) \
- if (set_gpmc_timing_reg(cs, (reg), (st), (end), t->field) < 0) \
- return -1
-#endif
int gpmc_calc_divider(unsigned int sync_clk)
{