From: Eugen Hristev eugen.hristev@microchip.com
Add a function in SFR implementation that will open the DDR input buffers. This can be called at DRAM initialization time.
Signed-off-by: Eugen Hristev eugen.hristev@microchip.com --- arch/arm/mach-at91/atmel_sfr.c | 11 +++++++++++ arch/arm/mach-at91/include/mach/at91_common.h | 3 +++ 2 files changed, 14 insertions(+)
diff --git a/arch/arm/mach-at91/atmel_sfr.c b/arch/arm/mach-at91/atmel_sfr.c index 07bd8ab..13cfba0 100644 --- a/arch/arm/mach-at91/atmel_sfr.c +++ b/arch/arm/mach-at91/atmel_sfr.c @@ -29,3 +29,14 @@ void configure_2nd_sram_as_l2_cache(void) } #endif
+void configure_ddrcfg_input_buffers(bool open) +{ + struct atmel_sfr *sfr = (struct atmel_sfr *)ATMEL_BASE_SFR; + + if (open) + writel(ATMEL_SFR_DDRCFG_FDQIEN | ATMEL_SFR_DDRCFG_FDQSIEN, + &sfr->ddrcfg); + else + writel(0, &sfr->ddrcfg); +} + diff --git a/arch/arm/mach-at91/include/mach/at91_common.h b/arch/arm/mach-at91/include/mach/at91_common.h index df7d0e7..e929b5e 100644 --- a/arch/arm/mach-at91/include/mach/at91_common.h +++ b/arch/arm/mach-at91/include/mach/at91_common.h @@ -35,6 +35,9 @@ void at91_disable_wdt(void); void matrix_init(void); void redirect_int_from_saic_to_aic(void); void configure_2nd_sram_as_l2_cache(void); +#ifdef CONFIG_ATMEL_SFR +void configure_ddrcfg_input_buffers(bool open); +#endif
int at91_set_ethaddr(int offset); int at91_video_show_board_info(void);