[PATCH 14/18] drivers: tee: optee: add support for dynamic optee memory base address

[Marco Felsch <m.felsch@pengutronix.de>]

Make use of the platform provided optee memory base address. Fallback to
the current behaviour if the platform doesn't provide the optee memory
base.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
 drivers/tee/optee/of.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/tee/optee/of.c b/drivers/tee/optee/of.c
index 8295a1751c52..cdf650592e90 100644
--- a/drivers/tee/optee/of.c
+++ b/drivers/tee/optee/of.c
@@ -4,12 +4,14 @@
 #include <linux/ioport.h>
 #include <asm/barebox-arm.h>
 #include <asm/optee.h>
+#include <tee/optee.h>
 
 int of_optee_fixup(struct device_node *root, void *_data)
 {
 	struct of_optee_fixup_data *fixup_data = _data;
 	struct resource res = {};
 	struct device_node *node;
+	u64 optee_membase;
 	int ret;
 
 	node = of_create_node(root, "/firmware/optee");
@@ -24,8 +26,13 @@ int of_optee_fixup(struct device_node *root, void *_data)
 	if (ret)
 		return ret;
 
-	res.start = arm_mem_endmem_get() - OPTEE_SIZE;
-	res.end = arm_mem_endmem_get() - fixup_data->shm_size -1;
+	if (!optee_get_membase(&optee_membase)) {
+		res.start = optee_membase;
+		res.end = optee_membase + OPTEE_SIZE - fixup_data->shm_size - 1;
+	} else {
+		res.start = arm_mem_endmem_get() - OPTEE_SIZE;
+		res.end = arm_mem_endmem_get() - fixup_data->shm_size - 1;
+	}
 	res.flags = IORESOURCE_BUSY;
 	res.name = "optee_core";
 
@@ -33,8 +40,13 @@ int of_optee_fixup(struct device_node *root, void *_data)
 	if (ret)
 		return ret;
 
-	res.start = arm_mem_endmem_get() - fixup_data->shm_size;
-	res.end = arm_mem_endmem_get() - 1;
+	if (!optee_get_membase(&optee_membase)) {
+		res.start = optee_membase + OPTEE_SIZE - fixup_data->shm_size;
+		res.end = optee_membase + OPTEE_SIZE - 1;
+	} else {
+		res.start = arm_mem_endmem_get() - fixup_data->shm_size;
+		res.end = arm_mem_endmem_get() - 1;
+	}
 	res.flags &= ~IORESOURCE_BUSY;
 	res.name = "optee_shm";
 
-- 
2.39.2