diff options
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/s3c2410.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c index 66f76e9618dd..512acfc89012 100644 --- a/drivers/mtd/nand/s3c2410.c +++ b/drivers/mtd/nand/s3c2410.c @@ -120,6 +120,8 @@ struct s3c2410_nand_info { int sel_bit; int mtd_count; + unsigned long save_nfconf; + enum s3c_cpu_type cpu_type; }; @@ -810,6 +812,16 @@ static int s3c24xx_nand_suspend(struct platform_device *dev, pm_message_t pm) struct s3c2410_nand_info *info = platform_get_drvdata(dev); if (info) { + info->save_nfconf = readl(info->regs + S3C2410_NFCONF); + + /* For the moment, we must ensure nFCE is high during + * the time we are suspended. This really should be + * handled by suspending the MTDs we are using, but + * that is currently not the case. */ + + writel(info->save_nfconf | info->sel_bit, + info->regs + S3C2410_NFCONF); + if (!allow_clk_stop(info)) clk_disable(info->clk); } @@ -820,11 +832,19 @@ static int s3c24xx_nand_suspend(struct platform_device *dev, pm_message_t pm) static int s3c24xx_nand_resume(struct platform_device *dev) { struct s3c2410_nand_info *info = platform_get_drvdata(dev); + unsigned long nfconf; if (info) { clk_enable(info->clk); s3c2410_nand_inithw(info, dev); + /* Restore the state of the nFCE line. */ + + nfconf = readl(info->regs + S3C2410_NFCONF); + nfconf &= ~info->sel_bit; + nfconf |= info->save_nfconf & info->sel_bit; + writel(nfconf, info->regs + S3C2410_NFCONF); + if (allow_clk_stop(info)) clk_disable(info->clk); } |