arm: mvebu: Don't call arch_cpu_init() from SPL at all

This patch removes the call to arch_cpu_init() in the SPL U-Boot version.
As SPL does not need all the configuration done in this function. And
also does not need the reconfiguration of the internal register
address to 0xf1000000. This will be done by the main U-Boot later on.

This also fixes a problem with the timer not beeing initialized on AXP,
as needed for the mdelay in the setup_usb_phys(). This will now only
be called once in main U-Boot.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>

3 files changed, 8 insertions, 21 deletions

diff --git a/arch/arm/mach-mvebu/cpu.c b/arch/arm/mach-mvebu/cpu.c
index fd56c99..071b13b 100644
--- a/arch/arm/mach-mvebu/cpu.c
+++ b/arch/arm/mach-mvebu/cpu.c
@@ -220,9 +220,11 @@ static void setup_usb_phys(void)
 	}
 }
 
+/*
+ * This function is not called from the SPL U-Boot version
+ */
 int arch_cpu_init(void)
 {
-#if !defined(CONFIG_SPL_BUILD)
 	struct pl310_regs *const pl310 =
 		(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
 
@@ -233,13 +235,11 @@ int arch_cpu_init(void)
 	 * still locked to cache.
 	 */
 	mmu_disable();
-#endif
 
 	/* Linux expects the internal registers to be at 0xf1000000 */
 	writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG);
 	set_cbar(SOC_REGS_PHY_BASE + 0xC000);
 
-#if !defined(CONFIG_SPL_BUILD)
 	/*
 	 * From this stage on, the SoC detection is working. As we have
 	 * configured the internal register base to the value used
@@ -253,7 +253,6 @@ int arch_cpu_init(void)
 	icache_disable();
 	dcache_disable();
 	clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
-#endif
 
 	/*
 	 * We need to call mvebu_mbus_probe() before calling
diff --git a/arch/arm/mach-mvebu/include/mach/soc.h b/arch/arm/mach-mvebu/include/mach/soc.h
index 2be8cba..b78da25 100644
--- a/arch/arm/mach-mvebu/include/mach/soc.h
+++ b/arch/arm/mach-mvebu/include/mach/soc.h
@@ -33,10 +33,11 @@
 #define INTREG_BASE_ADDR_REG	(INTREG_BASE + 0x20080)
 #if defined(CONFIG_SPL_BUILD)
 /*
- * On A38x switching the regs base address without running from
- * SDRAM doesn't seem to work. So let the SPL still use the
- * default base address and switch to the new address in the
- * main u-boot later.
+ * The SPL U-Boot version still runs with the default
+ * address for the internal registers, configured by
+ * the BootROM. Only the main U-Boot version uses the
+ * new internal register base address, that also is
+ * required for the Linux kernel.
  */
 #define SOC_REGS_PHY_BASE	0xd0000000
 #else
diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c
index 4eeef2d..832df0a 100644
--- a/arch/arm/mach-mvebu/spl.c
+++ b/arch/arm/mach-mvebu/spl.c
@@ -36,19 +36,6 @@ void board_init_f(ulong dummy)
 {
 	int ret;
 
-#ifndef CONFIG_MVEBU_BOOTROM_UARTBOOT
-	/*
-	 * Only call arch_cpu_init() when not returning to the
-	 * Marvell BootROM, which is done when booting via
-	 * the xmodem protocol (kwboot tool). Otherwise the
-	 * internal register will get remapped and the BootROM
-	 * can't continue to run correctly.
-	 */
-
-	/* Linux expects the internal registers to be at 0xf1000000 */
-	arch_cpu_init();
-#endif
-
 	/*
 	 * Pin muxing needs to be done before UART output, since
 	 * on A38x the UART pins need some re-muxing for output