JR3 is used by the secure firmware. We have to remove the node from
the Linux device tree to prevent Linux from using it.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
arch/arm/mach-layerscape/ppa.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/arm/mach-layerscape/ppa.c b/arch/arm/mach-layerscape/ppa.c
index 6070451020..c5eba35b33 100644
--- a/arch/arm/mach-layerscape/ppa.c
+++ b/arch/arm/mach-layerscape/ppa.c
@@ -18,14 +18,33 @@
int ppa_entry(const void *, u32 *, u32 *);
void dma_flush_range(void *ptr, size_t size);
+#define SEC_JR3_OFFSET 0x40000
+
static int of_psci_do_fixup(struct device_node *root, void *unused)
{
unsigned long psci_version;
+ struct device_node *np;
struct arm_smccc_res res = {};
arm_smccc_smc(ARM_PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0, 0, 0, 0, 0, &res);
psci_version = res.a0;
+ for_each_compatible_node_from(np, root, NULL, "fsl,sec-v4.0-job-ring") {
+ const void *reg;
+ int na = of_n_addr_cells(np);
+ u64 offset;
+
+ reg = of_get_property(np, "reg", NULL);
+ if (!reg)
+ continue;
+
+ offset = of_read_number(reg, na);
+ if (offset != SEC_JR3_OFFSET)
+ continue;
+
+ of_delete_node(np);
+ }
+
return of_psci_fixup(root, psci_version);
}
--
2.24.0
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