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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/mach-imx/cpu-imx35.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
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.c | 47 |
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 000000000..1fe75b39c --- /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); |