X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Fdrivers%2Fbootcount%2Fbootcount_i2c.c;fp=qemu%2Froms%2Fu-boot%2Fdrivers%2Fbootcount%2Fbootcount_i2c.c;h=e27b168c55cc556f5006894d63e284bcc08f654e;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/roms/u-boot/drivers/bootcount/bootcount_i2c.c b/qemu/roms/u-boot/drivers/bootcount/bootcount_i2c.c
new file mode 100644
index 000000000..e27b168c5
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/bootcount/bootcount_i2c.c
@@ -0,0 +1,44 @@
+/*
+ * (C) Copyright 2013
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <bootcount.h>
+#include <linux/compiler.h>
+#include <i2c.h>
+
+#define BC_MAGIC	0xbc
+
+void bootcount_store(ulong a)
+{
+	unsigned char buf[3];
+	int ret;
+
+	buf[0] = BC_MAGIC;
+	buf[1] = (a & 0xff);
+	ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, CONFIG_SYS_BOOTCOUNT_ADDR,
+		  CONFIG_BOOTCOUNT_ALEN, buf, 2);
+	if (ret != 0)
+		puts("Error writing bootcount\n");
+}
+
+ulong bootcount_load(void)
+{
+	unsigned char buf[3];
+	int ret;
+
+	ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, CONFIG_SYS_BOOTCOUNT_ADDR,
+		       CONFIG_BOOTCOUNT_ALEN, buf, 2);
+	if (ret != 0) {
+		puts("Error loading bootcount\n");
+		return 0;
+	}
+	if (buf[0] == BC_MAGIC)
+		return buf[1];
+
+	bootcount_store(0);
+
+	return 0;
+}