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Diffstat (limited to 'arch/arm/mach-zynq/common.c')
-rw-r--r--arch/arm/mach-zynq/common.c75
1 files changed, 71 insertions, 4 deletions
diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c
index 6fcc584c1a11..31a6fa40ba37 100644
--- a/arch/arm/mach-zynq/common.c
+++ b/arch/arm/mach-zynq/common.c
@@ -29,6 +29,8 @@
#include <linux/memblock.h>
#include <linux/irqchip.h>
#include <linux/irqchip/arm-gic.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
@@ -37,10 +39,15 @@
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/smp_scu.h>
+#include <asm/system_info.h>
#include <asm/hardware/cache-l2x0.h>
#include "common.h"
+#define ZYNQ_DEVCFG_MCTRL 0x80
+#define ZYNQ_DEVCFG_PS_VERSION_SHIFT 28
+#define ZYNQ_DEVCFG_PS_VERSION_MASK 0xF
+
void __iomem *zynq_scu_base;
/**
@@ -60,19 +67,76 @@ static struct platform_device zynq_cpuidle_device = {
};
/**
+ * zynq_get_revision - Get Zynq silicon revision
+ *
+ * Return: Silicon version or -1 otherwise
+ */
+static int __init zynq_get_revision(void)
+{
+ struct device_node *np;
+ void __iomem *zynq_devcfg_base;
+ u32 revision;
+
+ np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-devcfg-1.0");
+ if (!np) {
+ pr_err("%s: no devcfg node found\n", __func__);
+ return -1;
+ }
+
+ zynq_devcfg_base = of_iomap(np, 0);
+ if (!zynq_devcfg_base) {
+ pr_err("%s: Unable to map I/O memory\n", __func__);
+ return -1;
+ }
+
+ revision = readl(zynq_devcfg_base + ZYNQ_DEVCFG_MCTRL);
+ revision >>= ZYNQ_DEVCFG_PS_VERSION_SHIFT;
+ revision &= ZYNQ_DEVCFG_PS_VERSION_MASK;
+
+ iounmap(zynq_devcfg_base);
+
+ return revision;
+}
+
+/**
* zynq_init_machine - System specific initialization, intended to be
* called from board specific initialization.
*/
static void __init zynq_init_machine(void)
{
struct platform_device_info devinfo = { .name = "cpufreq-cpu0", };
+ struct soc_device_attribute *soc_dev_attr;
+ struct soc_device *soc_dev;
+ struct device *parent = NULL;
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ goto out;
+
+ system_rev = zynq_get_revision();
+ soc_dev_attr->family = kasprintf(GFP_KERNEL, "Xilinx Zynq");
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "0x%x", system_rev);
+ soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "0x%x",
+ zynq_slcr_get_device_id());
+
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR(soc_dev)) {
+ kfree(soc_dev_attr->family);
+ kfree(soc_dev_attr->revision);
+ kfree(soc_dev_attr->soc_id);
+ kfree(soc_dev_attr);
+ goto out;
+ }
+
+ parent = soc_device_to_device(soc_dev);
+
+out:
/*
- * 64KB way size, 8-way associativity, parity disabled
+ * Finished with the static registrations now; fill in the missing
+ * devices
*/
- l2x0_of_init(0x02060000, 0xF0F0FFFF);
-
- of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, parent);
platform_device_register(&zynq_cpuidle_device);
platform_device_register_full(&devinfo);
@@ -133,6 +197,9 @@ static const char * const zynq_dt_match[] = {
};
DT_MACHINE_START(XILINX_EP107, "Xilinx Zynq Platform")
+ /* 64KB way size, 8-way associativity, parity disabled */
+ .l2c_aux_val = 0x02000000,
+ .l2c_aux_mask = 0xf0ffffff,
.smp = smp_ops(zynq_smp_ops),
.map_io = zynq_map_io,
.init_irq = zynq_irq_init,