arm: mvebu: Avoid reading MVEBU_REG_PCIE_DEVID register too many times
Change detection of platform/cpu from runtime to compile time via config
define. This completely eliminates compiling code which is not going to run
on selected platform. Code which parses and prints device / revision id
still reads device id from MVEBU_REG_PCIE_DEVID register, but only once.
Signed-off-by: Pali Rohár <pali@kernel.org>
Acked-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/mach-mvebu/dram.c b/arch/arm/mach-mvebu/dram.c
index 349e0cc..d398d0f 100644
--- a/arch/arm/mach-mvebu/dram.c
+++ b/arch/arm/mach-mvebu/dram.c
@@ -220,7 +220,7 @@
return 0;
}
-/* Return the width of the DRAM bus, or 0 for unknown. */
+/* Return the width of the DRAM bus. */
static int bus_width(void)
{
int full_width = 0;
@@ -228,17 +228,11 @@
if (reg_read(REG_SDRAM_CONFIG_ADDR) & (1 << REG_SDRAM_CONFIG_WIDTH_OFFS))
full_width = 1;
- switch (mvebu_soc_family()) {
- case MVEBU_SOC_AXP:
- return full_width ? 64 : 32;
- break;
- case MVEBU_SOC_A375:
- case MVEBU_SOC_A38X:
- case MVEBU_SOC_MSYS:
- return full_width ? 32 : 16;
- default:
- return 0;
- }
+#ifdef CONFIG_ARMADA_XP
+ return full_width ? 64 : 32;
+#else
+ return full_width ? 32 : 16;
+#endif
}
static int cycle_mode(void)