v4.19.13 snapshot.
diff --git a/arch/arm/mach-imx/cpu-imx35.c b/arch/arm/mach-imx/cpu-imx35.c
new file mode 100644
index 0000000..8a54234
--- /dev/null
+++ b/arch/arm/mach-imx/cpu-imx35.c
@@ -0,0 +1,43 @@
+/*
+ * MX35 CPU type detection
+ *
+ * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#include <linux/module.h>
+#include <linux/io.h>
+
+#include "hardware.h"
+#include "iim.h"
+
+static int mx35_cpu_rev = -1;
+
+static int mx35_read_cpu_rev(void)
+{
+ u32 rev;
+
+ rev = imx_readl(MX35_IO_ADDRESS(MX35_IIM_BASE_ADDR + MXC_IIMSREV));
+ switch (rev) {
+ case 0x00:
+ return IMX_CHIP_REVISION_1_0;
+ case 0x10:
+ return IMX_CHIP_REVISION_2_0;
+ case 0x11:
+ return IMX_CHIP_REVISION_2_1;
+ default:
+ return IMX_CHIP_REVISION_UNKNOWN;
+ }
+}
+
+int mx35_revision(void)
+{
+ if (mx35_cpu_rev == -1)
+ mx35_cpu_rev = mx35_read_cpu_rev();
+
+ return mx35_cpu_rev;
+}
+EXPORT_SYMBOL(mx35_revision);