[U-Boot] [PATCH 1/4] SPEAr : SMI erase and write timeouts increased

[Tom <Tom.Rix@windriver.com>]

Vipin KUMAR wrote:
> SMI driver fails because of low timeout values. Increasing the erase and write
> timeouts to 3 seconds

This is a huge timeout change.
2ms to 3000ms.
If something goes wrong, it will seem like the board is hung.
Is this ok?

> 
> Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
> ---
>  drivers/mtd/spr_smi.c                |    8 ++++----
>  include/asm-arm/arch-spear/spr_smi.h |    6 +++---
>  2 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/mtd/spr_smi.c b/drivers/mtd/spr_smi.c
> index 9a70a19..189ee6d 100755
> --- a/drivers/mtd/spr_smi.c
> +++ b/drivers/mtd/spr_smi.c
> @@ -60,11 +60,11 @@ static struct flash_dev flash_ids[] = {
>   */
>  static void smi_wait_xfer_finish(int timeout)
>  {
> -	while (timeout--) {
> +	do {
>  		if (readl(&smicntl->smi_sr) & TFF)
>  			break;
>  		udelay(1000);
> -	}
> +	} while (timeout--);

This changes the function to wait at least 1ms even if timeout == 0.
Why was the original logic changed?

>  }
>  
>  /*
> @@ -215,11 +215,11 @@ static int smi_write_enable(int bank)
>  	/* Restore the CTRL REG1 state */
>  	writel(ctrlreg1, &smicntl->smi_cr1);
>  
> -	while (timeout--) {
> +	do {
>  		if (smi_read_sr(bank) & (1 << (bank + WM_SHIFT)))
>  			break;
>  		udelay(1000);
> -	}
> +	} while (timeout--);
>  
>  	if (timeout)
>  		return 0;
> diff --git a/include/asm-arm/arch-spear/spr_smi.h b/include/asm-arm/arch-spear/spr_smi.h
> index 06df745..e2e5e8f 100755
> --- a/include/asm-arm/arch-spear/spr_smi.h
> +++ b/include/asm-arm/arch-spear/spr_smi.h
> @@ -108,8 +108,8 @@ struct flash_dev {
>  	ushort sector_count;
>  };
>  
> -#define SFLASH_PAGE_SIZE	0x100	/* flash page size */
> -#define XFER_FINISH_TOUT	2	/* xfer finish timeout */
> -#define WMODE_TOUT		2	/* write enable timeout */
> +#define SFLASH_PAGE_SIZE	0x100		/* flash page size */
> +#define XFER_FINISH_TOUT	(3 * CONFIG_SYS_HZ)
> +#define WMODE_TOUT		(3 * CONFIG_SYS_HZ)
>  
>  #endif

Tom