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powerpc: fix fsl_upm nand driver modular build 

The fsl_upm nand driver fails to build because fsl_lbc_lock isn't
exported, the lock is needed by the inlined fsl_upm_run_pattern()
function:

ERROR: "fsl_lbc_lock" [drivers/mtd/nand/fsl_upm.ko] undefined!

Dave Jones purposed to export the lock, but it is better to just uninline
the fsl_upm_run_pattern().

When uninlined we also no longer need the exported fsl_lbc_regs, and
both fsl_lbc_lock and fsl_lbc_regs could be marked static.

While at it, also add some missing includes that we should have included
explicitly.

Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Anton Vorontsov 2008-10-09 04:32:59 +04:00 committed by Kumar Gala
parent 1fb25be1e7
commit c0da99d5f7
2 changed files with 53 additions and 48 deletions
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48
arch/powerpc/include/asm/fsl_lbc.h
View File

@ -23,9 +23,9 @@
#ifndef __ASM_FSL_LBC_H
#define __ASM_FSL_LBC_H
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <linux/io.h>
struct fsl_lbc_bank {
__be32 br; /**< Base Register */
@ -227,9 +227,6 @@ struct fsl_lbc_regs {
u8 res8[0xF00];
};
extern struct fsl_lbc_regs __iomem *fsl_lbc_regs;
extern spinlock_t fsl_lbc_lock;
/*
* FSL UPM routines
*/
@ -268,44 +265,7 @@ static inline void fsl_upm_end_pattern(struct fsl_upm *upm)
cpu_relax();
}
/**
* fsl_upm_run_pattern - actually run an UPM pattern
* @upm: pointer to the fsl_upm structure obtained via fsl_upm_find
* @io_base: remapped pointer to where memory access should happen
* @mar: MAR register content during pattern execution
*
* This function triggers dummy write to the memory specified by the io_base,
* thus UPM pattern actually executed. Note that mar usage depends on the
* pre-programmed AMX bits in the UPM RAM.
*/
static inline int fsl_upm_run_pattern(struct fsl_upm *upm,
void __iomem *io_base, u32 mar)
{
int ret = 0;
unsigned long flags;
spin_lock_irqsave(&fsl_lbc_lock, flags);
out_be32(&fsl_lbc_regs->mar, mar << (32 - upm->width));
switch (upm->width) {
case 8:
out_8(io_base, 0x0);
break;
case 16:
out_be16(io_base, 0x0);
break;
case 32:
out_be32(io_base, 0x0);
break;
default:
ret = -EINVAL;
break;
}
spin_unlock_irqrestore(&fsl_lbc_lock, flags);
return ret;
}
extern int fsl_upm_run_pattern(struct fsl_upm *upm, void __iomem *io_base,
u32 mar);
#endif /* __ASM_FSL_LBC_H */

53
arch/powerpc/sysdev/fsl_lbc.c
View File

@ -11,14 +11,19 @@
* (at your option) any later version.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/io.h>
#include <linux/of.h>
#include <asm/prom.h>
#include <asm/fsl_lbc.h>
spinlock_t fsl_lbc_lock = __SPIN_LOCK_UNLOCKED(fsl_lbc_lock);
struct fsl_lbc_regs __iomem *fsl_lbc_regs;
EXPORT_SYMBOL(fsl_lbc_regs);
static spinlock_t fsl_lbc_lock = __SPIN_LOCK_UNLOCKED(fsl_lbc_lock);
static struct fsl_lbc_regs __iomem *fsl_lbc_regs;
static char __initdata *compat_lbc[] = {
"fsl,pq2-localbus",
@ -127,3 +132,43 @@ int fsl_upm_find(phys_addr_t addr_base, struct fsl_upm *upm)
return 0;
}
EXPORT_SYMBOL(fsl_upm_find);
/**
* fsl_upm_run_pattern - actually run an UPM pattern
* @upm: pointer to the fsl_upm structure obtained via fsl_upm_find
* @io_base: remapped pointer to where memory access should happen
* @mar: MAR register content during pattern execution
*
* This function triggers dummy write to the memory specified by the io_base,
* thus UPM pattern actually executed. Note that mar usage depends on the
* pre-programmed AMX bits in the UPM RAM.
*/
int fsl_upm_run_pattern(struct fsl_upm *upm, void __iomem *io_base, u32 mar)
{
int ret = 0;
unsigned long flags;
spin_lock_irqsave(&fsl_lbc_lock, flags);
out_be32(&fsl_lbc_regs->mar, mar << (32 - upm->width));
switch (upm->width) {
case 8:
out_8(io_base, 0x0);
break;
case 16:
out_be16(io_base, 0x0);
break;
case 32:
out_be32(io_base, 0x0);
break;
default:
ret = -EINVAL;
break;
}
spin_unlock_irqrestore(&fsl_lbc_lock, flags);
return ret;
}
EXPORT_SYMBOL(fsl_upm_run_pattern);