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OMAP2/3: gpmc-onenand: correct use of async timings 

Use async timings when sync timings are not requested.

Also ensure that OneNAND is in async mode when async
timings are used.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Adrian Hunter 2009-06-23 13:30:24 +03:00 committed by Tony Lindgren
parent aecedb94b3
commit 6d453e84b5
1 changed files with 19 additions and 2 deletions
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21
arch/arm/mach-omap2/gpmc-onenand.c
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@ -31,6 +31,8 @@ static struct platform_device gpmc_onenand_device = {
static int omap2_onenand_set_async_mode(int cs, void __iomem *onenand_base)
{
struct gpmc_timings t;
u32 reg;
int err;
const int t_cer = 15;
const int t_avdp = 12;
@ -43,6 +45,11 @@ static int omap2_onenand_set_async_mode(int cs, void __iomem *onenand_base)
const int t_wpl = 40;
const int t_wph = 30;
/* Ensure sync read and sync write are disabled */
reg = readw(onenand_base + ONENAND_REG_SYS_CFG1);
reg &= ~ONENAND_SYS_CFG1_SYNC_READ & ~ONENAND_SYS_CFG1_SYNC_WRITE;
writew(reg, onenand_base + ONENAND_REG_SYS_CFG1);
memset(&t, 0, sizeof(t));
t.sync_clk = 0;
t.cs_on = 0;
@ -74,7 +81,16 @@ static int omap2_onenand_set_async_mode(int cs, void __iomem *onenand_base)
GPMC_CONFIG1_DEVICESIZE_16 |
GPMC_CONFIG1_MUXADDDATA);
return gpmc_cs_set_timings(cs, &t);
err = gpmc_cs_set_timings(cs, &t);
if (err)
return err;
/* Ensure sync read and sync write are disabled */
reg = readw(onenand_base + ONENAND_REG_SYS_CFG1);
reg &= ~ONENAND_SYS_CFG1_SYNC_READ & ~ONENAND_SYS_CFG1_SYNC_WRITE;
writew(reg, onenand_base + ONENAND_REG_SYS_CFG1);
return 0;
}
static void set_onenand_cfg(void __iomem *onenand_base, int latency,
@ -124,7 +140,8 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg,
} else if (cfg->flags & ONENAND_SYNC_READWRITE) {
sync_read = 1;
sync_write = 1;
}
} else
return omap2_onenand_set_async_mode(cs, onenand_base);
if (!freq) {
/* Very first call freq is not known */