arm: mvebu: a37x: Detect CONFIG_SYS_TCLK from SAR register

Bit 20 in SAR register specifies if TCLK is running at 200 MHz or 166 MHz.
Use this information instead of manual configuration in every board file.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/arch/arm/mach-mvebu/include/mach/soc.h b/arch/arm/mach-mvebu/include/mach/soc.h
index cb323aa59a761fd06c4f5f8f763b366600ece089..eb6906ad802743e18b78ec447b4b3f960c64885a 100644 (file)
--- a/arch/arm/mach-mvebu/include/mach/soc.h
+++ b/arch/arm/mach-mvebu/include/mach/soc.h
@@ -145,6 +145,9 @@
 
 #define BOOT_FROM_UART         0x30
 #define BOOT_FROM_SPI          0x38
+
+#define CONFIG_SYS_TCLK                ((readl(CONFIG_SAR_REG) & BIT(20)) ? \
+                                200000000 : 166000000)
 #elif defined(CONFIG_ARMADA_38X)
 /* SAR values for Armada 38x */
 #define CONFIG_SAR_REG         (MVEBU_REGISTER(0x18600))

diff --git a/include/configs/db-88f6720.h b/include/configs/db-88f6720.h
index 410a40af3e63e31362c8aaaff015b3761fca12ce..18f4707e6be791dbf7a9e58b1404dfc15824ff7f 100644 (file)
--- a/include/configs/db-88f6720.h
+++ b/include/configs/db-88f6720.h
@@ -15,7 +15,6 @@
  * for DDR ECC byte filling in the SPL before loading the main
  * U-Boot into it.
  */
-#define CONFIG_SYS_TCLK                200000000       /* 200MHz */
 
 /* I2C */
 #define CONFIG_SYS_I2C_LEGACY