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Date: Mon, 04 Jul 2011 11:37:01 +0200
From: Nicolas Ferre <nicolas.ferre@...el.com>
To: Arnd Bergmann <arnd@...db.de>
CC: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
patrice.vilchez@...el.com
Subject: Re: [PATCH for 3.0] AT91: Change nand buswidth logic to match hardware
default configuration
Le 01/07/2011 12:25, Nicolas Ferre :
> The recently modified nand buswitth configuration is not aligned with
> board reality: the double footprint on boards is always populated with 8bits
> buswidth nand flashes.
> So we have to consider that without particular configuration the 8bits
> buswidth is selected by default.
> Moreover, the previous logic was always using !board_have_nand_8bit(), we
> change it to a simpler: board_have_nand_16bit().
>
> Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
> Tested-by: Ludovic Desroches <ludovic.desroches@...el.com>
Arnd,
Can you please handle this parch for 3.0-final as a bug fix through the
arm-soc.git tree?
You can queue it in addition of the pull request sent by
Jean-Christophe: "AT91: Fix pull requset".
Thanks, best regards,
> ---
> arch/arm/mach-at91/board-cap9adk.c | 2 +-
> arch/arm/mach-at91/board-sam9260ek.c | 2 +-
> arch/arm/mach-at91/board-sam9261ek.c | 2 +-
> arch/arm/mach-at91/board-sam9263ek.c | 2 +-
> arch/arm/mach-at91/board-sam9g20ek.c | 2 +-
> arch/arm/mach-at91/board-sam9m10g45ek.c | 2 +-
> arch/arm/mach-at91/include/mach/system_rev.h | 10 +++++-----
> 7 files changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/arch/arm/mach-at91/board-cap9adk.c b/arch/arm/mach-at91/board-cap9adk.c
> index 1904fdf..cdb65d4 100644
> --- a/arch/arm/mach-at91/board-cap9adk.c
> +++ b/arch/arm/mach-at91/board-cap9adk.c
> @@ -215,7 +215,7 @@ static void __init cap9adk_add_device_nand(void)
> csa = at91_sys_read(AT91_MATRIX_EBICSA);
> at91_sys_write(AT91_MATRIX_EBICSA, csa | AT91_MATRIX_EBI_VDDIOMSEL_3_3V);
>
> - cap9adk_nand_data.bus_width_16 = !board_have_nand_8bit();
> + cap9adk_nand_data.bus_width_16 = board_have_nand_16bit();
> /* setup bus-width (8 or 16) */
> if (cap9adk_nand_data.bus_width_16)
> cap9adk_nand_smc_config.mode |= AT91_SMC_DBW_16;
> diff --git a/arch/arm/mach-at91/board-sam9260ek.c b/arch/arm/mach-at91/board-sam9260ek.c
> index d600dc1..5c24074 100644
> --- a/arch/arm/mach-at91/board-sam9260ek.c
> +++ b/arch/arm/mach-at91/board-sam9260ek.c
> @@ -214,7 +214,7 @@ static struct sam9_smc_config __initdata ek_nand_smc_config = {
>
> static void __init ek_add_device_nand(void)
> {
> - ek_nand_data.bus_width_16 = !board_have_nand_8bit();
> + ek_nand_data.bus_width_16 = board_have_nand_16bit();
> /* setup bus-width (8 or 16) */
> if (ek_nand_data.bus_width_16)
> ek_nand_smc_config.mode |= AT91_SMC_DBW_16;
> diff --git a/arch/arm/mach-at91/board-sam9261ek.c b/arch/arm/mach-at91/board-sam9261ek.c
> index f897f84..b60c22b 100644
> --- a/arch/arm/mach-at91/board-sam9261ek.c
> +++ b/arch/arm/mach-at91/board-sam9261ek.c
> @@ -220,7 +220,7 @@ static struct sam9_smc_config __initdata ek_nand_smc_config = {
>
> static void __init ek_add_device_nand(void)
> {
> - ek_nand_data.bus_width_16 = !board_have_nand_8bit();
> + ek_nand_data.bus_width_16 = board_have_nand_16bit();
> /* setup bus-width (8 or 16) */
> if (ek_nand_data.bus_width_16)
> ek_nand_smc_config.mode |= AT91_SMC_DBW_16;
> diff --git a/arch/arm/mach-at91/board-sam9263ek.c b/arch/arm/mach-at91/board-sam9263ek.c
> index 605b26f..9bbdc92 100644
> --- a/arch/arm/mach-at91/board-sam9263ek.c
> +++ b/arch/arm/mach-at91/board-sam9263ek.c
> @@ -221,7 +221,7 @@ static struct sam9_smc_config __initdata ek_nand_smc_config = {
>
> static void __init ek_add_device_nand(void)
> {
> - ek_nand_data.bus_width_16 = !board_have_nand_8bit();
> + ek_nand_data.bus_width_16 = board_have_nand_16bit();
> /* setup bus-width (8 or 16) */
> if (ek_nand_data.bus_width_16)
> ek_nand_smc_config.mode |= AT91_SMC_DBW_16;
> diff --git a/arch/arm/mach-at91/board-sam9g20ek.c b/arch/arm/mach-at91/board-sam9g20ek.c
> index 7624cf0..1325a50 100644
> --- a/arch/arm/mach-at91/board-sam9g20ek.c
> +++ b/arch/arm/mach-at91/board-sam9g20ek.c
> @@ -198,7 +198,7 @@ static struct sam9_smc_config __initdata ek_nand_smc_config = {
>
> static void __init ek_add_device_nand(void)
> {
> - ek_nand_data.bus_width_16 = !board_have_nand_8bit();
> + ek_nand_data.bus_width_16 = board_have_nand_16bit();
> /* setup bus-width (8 or 16) */
> if (ek_nand_data.bus_width_16)
> ek_nand_smc_config.mode |= AT91_SMC_DBW_16;
> diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c
> index 063c95d..33eaa13 100644
> --- a/arch/arm/mach-at91/board-sam9m10g45ek.c
> +++ b/arch/arm/mach-at91/board-sam9m10g45ek.c
> @@ -178,7 +178,7 @@ static struct sam9_smc_config __initdata ek_nand_smc_config = {
>
> static void __init ek_add_device_nand(void)
> {
> - ek_nand_data.bus_width_16 = !board_have_nand_8bit();
> + ek_nand_data.bus_width_16 = board_have_nand_16bit();
> /* setup bus-width (8 or 16) */
> if (ek_nand_data.bus_width_16)
> ek_nand_smc_config.mode |= AT91_SMC_DBW_16;
> diff --git a/arch/arm/mach-at91/include/mach/system_rev.h b/arch/arm/mach-at91/include/mach/system_rev.h
> index b855ee7..8f48660 100644
> --- a/arch/arm/mach-at91/include/mach/system_rev.h
> +++ b/arch/arm/mach-at91/include/mach/system_rev.h
> @@ -13,13 +13,13 @@
> * the 16-31 bit are reserved for at91 generic information
> *
> * bit 31:
> - * 0 => nand 16 bit
> - * 1 => nand 8 bit
> + * 0 => nand 8 bit
> + * 1 => nand 16 bit
> */
> -#define BOARD_HAVE_NAND_8BIT (1 << 31)
> -static int inline board_have_nand_8bit(void)
> +#define BOARD_HAVE_NAND_16BIT (1 << 31)
> +static inline int board_have_nand_16bit(void)
> {
> - return system_rev & BOARD_HAVE_NAND_8BIT;
> + return system_rev & BOARD_HAVE_NAND_16BIT;
> }
>
> #endif /* __ARCH_SYSTEM_REV_H__ */
--
Nicolas Ferre
--
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