diff options
| -rw-r--r-- | recipes/at91bootstrap/at91bootstrap-2.13/mtcdp/sdram_slow_slew_rate.patch | 15 | ||||
| -rw-r--r-- | recipes/at91bootstrap/at91bootstrap_2.13.bb | 8 |
2 files changed, 21 insertions, 2 deletions
diff --git a/recipes/at91bootstrap/at91bootstrap-2.13/mtcdp/sdram_slow_slew_rate.patch b/recipes/at91bootstrap/at91bootstrap-2.13/mtcdp/sdram_slow_slew_rate.patch new file mode 100644 index 0000000000..a2cb3d4f7c --- /dev/null +++ b/recipes/at91bootstrap/at91bootstrap-2.13/mtcdp/sdram_slow_slew_rate.patch @@ -0,0 +1,15 @@ +Index: at91bootstrap-2.13/board/at91sam9g20ek/at91sam9g20ek.c +=================================================================== +--- at91bootstrap-2.13.orig/board/at91sam9g20ek/at91sam9g20ek.c 2011-10-31 13:20:49.207272783 -0500 ++++ at91bootstrap-2.13/board/at91sam9g20ek/at91sam9g20ek.c 2011-10-31 13:21:39.099957717 -0500 +@@ -116,8 +116,8 @@ + #endif /* CONFIG_VERBOSE */ + + #ifdef CONFIG_SDRAM +- /* Initialize the matrix (memory voltage = 3.3) */ +- writel((readl(AT91C_BASE_CCFG + CCFG_EBICSA)) | AT91C_EBI_CS1A_SDRAMC | (1<<16), AT91C_BASE_CCFG + CCFG_EBICSA); ++ /* Initialize the matrix (memory voltage = 3.3, slow slew rate) */ ++ writel((readl(AT91C_BASE_CCFG + CCFG_EBICSA)) | AT91C_EBI_CS1A_SDRAMC | (1<<16) | (1<<17), AT91C_BASE_CCFG + CCFG_EBICSA); + + /* Configure SDRAM Controller */ + sdram_init( AT91C_SDRAMC_NC_9 | diff --git a/recipes/at91bootstrap/at91bootstrap_2.13.bb b/recipes/at91bootstrap/at91bootstrap_2.13.bb index 8db73b8904..04121b3f3b 100644 --- a/recipes/at91bootstrap/at91bootstrap_2.13.bb +++ b/recipes/at91bootstrap/at91bootstrap_2.13.bb @@ -1,11 +1,15 @@ require at91bootstrap.inc -PR = "r0" +PR = "r1" DEFAULT_PREFERENCE = "-1" DEFAULT_PREFERENCE_at91sam9g45ek = "1" DEFAULT_PREFERENCE_at91sam9g45ekes = "1" DEFAULT_PREFERENCE_at91sam9m10ek = "1" +# slow slew rate for SDRAM +SRC_URI_append_mtcdp = "file://sdram_slow_slew_rate.patch;patch=1" + # run memory bus at 1.8v for mtcdp-embedded -SRC_URI_append_mtcdp-embedded = "file://memory_bus_1.8v.patch;patch=1" +SRC_URI_append_mtcdp-embedded = "file://memory_bus_1.8v.patch;patch=1 \ + file://sdram_slow_slew_rate.patch;patch=1" AT91BOOTSTRAP_FLAGS_append_mtcdp-embedded = "-DCONFIG_USER_EBI_1V8" |