On Mon, Nov 03, 2014 at 11:10:23AM +0100, Wadim Egorov wrote:
> "Silicon revision 1.0 devices only provide the MMC2_DAT7 signal when Mode3 is
> selected. Silicon revision 2.0 and newer devices implement another level of
> pin multiplexing which provides the original MMC2_DAT7 signal or RMII2_CRS_DV
> signal when Mode3 is selected. This new level of of pin multiplexing is
> selected with bit zero of the SMA2 register."
>
> See AM335x Sitara Processors Manual.
>
> Signed-off-by: Wadim Egorov <w.egorov@xxxxxxxxx>
Applied, thanks
Sascha
> ---
> v2: Added silicon revision check. SMA2 register does not exist in revision 1.0
>
> arch/arm/mach-omap/am33xx_generic.c | 17 +++++++++++++++++
> arch/arm/mach-omap/include/mach/am33xx-generic.h | 1 +
> 2 files changed, 18 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap/am33xx_generic.c b/arch/arm/mach-omap/am33xx_generic.c
> index f293134..7fe8881 100644
> --- a/arch/arm/mach-omap/am33xx_generic.c
> +++ b/arch/arm/mach-omap/am33xx_generic.c
> @@ -428,3 +428,20 @@ void am335x_sdram_init(int ioctrl, const struct am33xx_cmd_control *cmd_ctrl,
>
> am33xx_config_sdram(emif_regs);
> }
> +
> +#define AM33XX_CONTROL_SMA2_OFS 0x1320
> +
> +/**
> + * am33xx_select_rmii2_crs_dv - Select RMII2_CRS_DV on GPMC_A9 pin in MODE3
> + */
> +void am33xx_select_rmii2_crs_dv(void)
> +{
> + uint32_t val;
> +
> + if (am33xx_get_cpu_rev() == AM335X_ES1_0)
> + return;
> +
> + val = readl(AM33XX_CTRL_BASE + AM33XX_CONTROL_SMA2_OFS);
> + val |= 0x00000001;
> + writel(val, AM33XX_CTRL_BASE + AM33XX_CONTROL_SMA2_OFS);
> +}
> diff --git a/arch/arm/mach-omap/include/mach/am33xx-generic.h b/arch/arm/mach-omap/include/mach/am33xx-generic.h
> index 6c85d51..1264e7e 100644
> --- a/arch/arm/mach-omap/include/mach/am33xx-generic.h
> +++ b/arch/arm/mach-omap/include/mach/am33xx-generic.h
> @@ -33,5 +33,6 @@ void __noreturn am33xx_reset_cpu(unsigned long addr);
> void am33xx_enable_per_clocks(void);
> int am33xx_init(void);
> int am33xx_devices_init(void);
> +void am33xx_select_rmii2_crs_dv(void);
>
> #endif /* __MACH_AM33XX_GENERIC_H */
> --
> 1.7.0.4
>
>
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