X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farm926ejs%2Fmxs%2Fspl_boot.c;h=74bc009dc5b0bc1a5aba1fc07d54a55036408a19;hp=0392afd9be4b024083be19f7e359dc7f0d4d9957;hb=8ec346e17b5bf6897f038b8ecc3ecd073e097a22;hpb=a78dac79ede7fbb4c9e816abc879655540c3f076

diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_boot.c b/arch/arm/cpu/arm926ejs/mxs/spl_boot.c
index 0392afd9be..74bc009dc5 100644
--- a/arch/arm/cpu/arm926ejs/mxs/spl_boot.c
+++ b/arch/arm/cpu/arm926ejs/mxs/spl_boot.c
@@ -22,15 +22,18 @@
  * takes a few seconds to roll. The boot doesn't take that long, so to keep the
  * code simple, it doesn't take rolling into consideration.
  */
+/*
+ * There's nothing to be taken into consideration for the rollover.
+ * Two's complement arithmetic used correctly does all that's needed
+ * automagically.
+ */
 void early_delay(int delay)
 {
 	struct mxs_digctl_regs *digctl_regs =
 		(struct mxs_digctl_regs *)MXS_DIGCTL_BASE;
+	u32 start = readl(&digctl_regs->hw_digctl_microseconds);
 
-	uint32_t st = readl(&digctl_regs->hw_digctl_microseconds);
-	st += delay;
-	while (st > readl(&digctl_regs->hw_digctl_microseconds))
-		;
+	while (readl(&digctl_regs->hw_digctl_microseconds) - start < delay);
 }
 
 #define	MUX_CONFIG_BOOTMODE_PAD	(MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
@@ -120,7 +123,7 @@ void mxs_common_spl_init(const iomux_cfg_t *iomux_setup,
 	mxs_power_wait_pswitch();
 }
 
-/* Support aparatus */
+/* Support apparatus */
 inline void board_init_f(unsigned long bootflag)
 {
 	for (;;)