2 #include <linux/module.h>
5 #include <linux/of_address.h>
6 #include <linux/slab.h>
7 #include <linux/sys_soc.h>
12 unsigned int __mxc_cpu_type;
13 static unsigned int imx_soc_revision;
15 void mxc_set_cpu_type(unsigned int type)
17 __mxc_cpu_type = type;
20 void imx_set_soc_revision(unsigned int rev)
22 imx_soc_revision = rev;
25 unsigned int imx_get_soc_revision(void)
27 return imx_soc_revision;
30 void imx_print_silicon_rev(const char *cpu, int srev)
32 if (srev == IMX_CHIP_REVISION_UNKNOWN)
33 pr_info("CPU identified as %s, unknown revision\n", cpu);
35 pr_info("CPU identified as %s, silicon rev %d.%d\n",
36 cpu, (srev >> 4) & 0xf, srev & 0xf);
39 void __init imx_set_aips(void __iomem *base)
43 * Set all MPROTx to be non-bufferable, trusted for R/W,
44 * not forced to user-mode.
46 imx_writel(0x77777777, base + 0x0);
47 imx_writel(0x77777777, base + 0x4);
50 * Set all OPACRx to be non-bufferable, to not require
51 * supervisor privilege level for access, allow for
52 * write access and untrusted master access.
54 imx_writel(0x0, base + 0x40);
55 imx_writel(0x0, base + 0x44);
56 imx_writel(0x0, base + 0x48);
57 imx_writel(0x0, base + 0x4C);
58 reg = imx_readl(base + 0x50) & 0x00FFFFFF;
59 imx_writel(reg, base + 0x50);
62 void __init imx_aips_allow_unprivileged_access(
65 void __iomem *aips_base_addr;
66 struct device_node *np;
68 for_each_compatible_node(np, NULL, compat) {
69 aips_base_addr = of_iomap(np, 0);
70 imx_set_aips(aips_base_addr);
74 struct device * __init imx_soc_device_init(void)
76 struct soc_device_attribute *soc_dev_attr;
77 struct soc_device *soc_dev;
78 struct device_node *root;
82 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
86 soc_dev_attr->family = "Freescale i.MX";
88 root = of_find_node_by_path("/");
89 ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
94 switch (__mxc_cpu_type) {
134 case MXC_CPU_IMX6ULL:
143 soc_dev_attr->soc_id = soc_id;
145 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
146 (imx_soc_revision >> 4) & 0xf,
147 imx_soc_revision & 0xf);
148 if (!soc_dev_attr->revision)
151 soc_dev = soc_device_register(soc_dev_attr);
155 return soc_device_to_device(soc_dev);
158 kfree(soc_dev_attr->revision);