diff options
| author | Eugen Hristev | 2019-08-08 07:48:30 +0000 |
|---|---|---|
| committer | Eugen Hristev | 2019-10-08 09:16:11 +0300 |
| commit | b1c7b33be20e81adc45a4f25bba30f9439ce4e17 (patch) | |
| tree | ef53892c0bcf53346b87920087c460e1137f676e /arch/arm | |
| parent | d231e37a2056c18159f2fbe5518518a9a86ca8a4 (diff) | |
ARM: at91: sfr: implement DDR input buffers open function
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>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-at91/atmel_sfr.c | 11 | ||||
| -rw-r--r-- | arch/arm/mach-at91/include/mach/at91_common.h | 3 |
2 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/atmel_sfr.c b/arch/arm/mach-at91/atmel_sfr.c index 07bd8abe939..13cfba0ba0c 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 df7d0e7051f..e929b5e1d20 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); |