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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm/mach-imx/cpu-imx35.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-imx/cpu-imx35.c')
-rw-r--r--arch/arm/mach-imx/cpu-imx35.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/cpu-imx35.c b/arch/arm/mach-imx/cpu-imx35.c
new file mode 100644
index 0000000000..1fe75b39c2
--- /dev/null
+++ b/arch/arm/mach-imx/cpu-imx35.c
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * MX35 CPU type detection
+ *
+ * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
+ */
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+
+#include "hardware.h"
+#include "iim.h"
+
+static int mx35_cpu_rev = -1;
+
+static int mx35_read_cpu_rev(void)
+{
+ void __iomem *iim_base;
+ struct device_node *np;
+ u32 rev;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,imx35-iim");
+ iim_base = of_iomap(np, 0);
+ of_node_put(np);
+ BUG_ON(!iim_base);
+
+ rev = imx_readl(iim_base + 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);