From ddb9028fe1063971f0f928782d66052bd6bc19c4 Mon Sep 17 00:00:00 2001 From: Steve Sakoman Date: Thu, 4 Nov 2010 12:04:52 -0700 Subject: ARMV7: Overo: Automatically set clock rate to maximum if mpurate env variable is "auto" The maximum clock rate for the OMAP3 processors on Overo depends on the processor type and revision. This patch sets the clock rate to the spec sheet maximum if the mpurate environment variable is set to "auto". Otherwise it passes the mpurate variable unchanged on the kernel command line. Signed-off-by: Steve Sakoman --- board/overo/overo.c | 16 ++++++++++++++++ include/configs/omap3_overo.h | 2 +- 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/board/overo/overo.c b/board/overo/overo.c index 4eafdb1df..40512a997 100644 --- a/board/overo/overo.c +++ b/board/overo/overo.c @@ -281,6 +281,22 @@ int misc_init_r(void) dieid_num_r(); + if (strcmp(getenv("mpurate"), "auto") == 0) + switch (get_cpu_family()) { + case CPU_OMAP34XX: + if ((get_cpu_rev() >= CPU_3XX_ES31) && + (get_sku_id() == SKUID_CLK_720MHZ)) + setenv("mpurate", "720"); + else + setenv("mpurate", "600"); + break; + case CPU_OMAP36XX: + setenv("mpurate", "720"); + break; + default: + setenv("mpurate", "500"); + } + return 0; } diff --git a/include/configs/omap3_overo.h b/include/configs/omap3_overo.h index 242b317d0..112e6f8b9 100644 --- a/include/configs/omap3_overo.h +++ b/include/configs/omap3_overo.h @@ -157,7 +157,7 @@ #define CONFIG_EXTRA_ENV_SETTINGS \ "loadaddr=0x82000000\0" \ "console=ttyS2,115200n8\0" \ - "mpurate=500\0" \ + "mpurate=auto\0" \ "vram=12M\0" \ "dvimode=1024x768MR-16@60\0" \ "defaultdisplay=dvi\0" \ -- cgit v1.2.3