[U-Boot] [PATCH] arm64: zynqmp: Use zynqmp_mmio_read/write functions

[Michal Simek]

From: T Karthik Reddy <t.karthik.reddy at xilinx.com>

Changed the return type of reset_reason() to int from u32, because
zynqmp_mmio_read/write() returns signed value on error.
Replaced readl and writel functions with zynqmp_mmio_read &
zynqmp_mmio_write functions to access RESET_REASON(CRL_APB) registers.

Signed-off-by: T Karthik Reddy <t.karthik.reddy at xilinx.com>
Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu at xilinx.com>
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

 board/xilinx/zynqmp/zynqmp.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index 0ac9b46b5f4b..cfe772a9cf48 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -487,18 +487,20 @@ static const struct {
 	{}
 };
 
-static u32 reset_reason(void)
+static int reset_reason(void)
 {
-	u32 ret;
-	int i;
+	u32 reg;
+	int i, ret;
 	const char *reason = NULL;
 
-	ret = readl(&crlapb_base->reset_reason);
+	ret = zynqmp_mmio_read((ulong)&crlapb_base->reset_reason, &reg);
+	if (ret)
+		return -EINVAL;
 
 	puts("Reset reason:\t");
 
 	for (i = 0; i < ARRAY_SIZE(reset_reasons); i++) {
-		if (ret & reset_reasons[i].bit) {
+		if (reg & reset_reasons[i].bit) {
 			reason = reset_reasons[i].name;
 			printf("%s ", reset_reasons[i].name);
 			break;
@@ -509,7 +511,9 @@ static u32 reset_reason(void)
 
 	env_set("reset_reason", reason);
 
-	writel(~0, &crlapb_base->reset_reason);
+	ret = zynqmp_mmio_write(~0, ~0, (ulong)&crlapb_base->reset_reason);
+	if (ret)
+		return -EINVAL;
 
 	return ret;
 }
-- 
1.9.1