Makiing memory-region and flash as optional parameter in device
tree if user needs to use these parameter through ioctl then
need to define in devicetree.
Signed-off-by: Vijay Khemka <vijaykhe...@fb.com>
---
drivers/misc/aspeed-lpc-ctrl.c | 58 +++++++++++++++++++++-------------
1 file changed, 36 insertions(+), 22 deletions(-)
diff --git a/drivers/misc/aspeed-lpc-ctrl.c b/drivers/misc/aspeed-lpc-ctrl.c
index a024f8042259..332210e06e98 100644
--- a/drivers/misc/aspeed-lpc-ctrl.c
+++ b/drivers/misc/aspeed-lpc-ctrl.c
@@ -68,6 +68,7 @@ static long aspeed_lpc_ctrl_ioctl(struct file *file, unsigned
int cmd,
unsigned long param)
{
struct aspeed_lpc_ctrl *lpc_ctrl = file_aspeed_lpc_ctrl(file);
+ struct device *dev = file->private_data;
void __user *p = (void __user *)param;
struct aspeed_lpc_ctrl_mapping map;
u32 addr;
@@ -90,6 +91,12 @@ static long aspeed_lpc_ctrl_ioctl(struct file *file,
unsigned int cmd,
if (map.window_id != 0)
return -EINVAL;
+ /* If memory-region is not described in device tree */
+ if (!lpc_ctrl->mem_size) {
+ dev_err(dev, "Didn't find reserved memory\n");
+ return -EINVAL;
+ }
+
map.size = lpc_ctrl->mem_size;
return copy_to_user(p, &map, sizeof(map)) ? -EFAULT : 0;
@@ -126,9 +133,18 @@ static long aspeed_lpc_ctrl_ioctl(struct file *file,
unsigned int cmd,
return -EINVAL;
if (map.window_type == ASPEED_LPC_CTRL_WINDOW_FLASH) {
+ if (!lpc_ctrl->pnor_size) {
+ dev_err(dev, "Didn't find host pnor flash\n");
+ return -EINVAL;
+ }
addr = lpc_ctrl->pnor_base;
size = lpc_ctrl->pnor_size;
} else if (map.window_type == ASPEED_LPC_CTRL_WINDOW_MEMORY) {
+ /* If memory-region is not described in device tree */
+ if (!lpc_ctrl->mem_size) {
+ dev_err(dev, "Didn't find reserved memory\n");
+ return -EINVAL;
+ }
addr = lpc_ctrl->mem_base;
size = lpc_ctrl->mem_size;
} else {
@@ -196,17 +212,17 @@ static int aspeed_lpc_ctrl_probe(struct platform_device
*pdev)
if (!lpc_ctrl)
return -ENOMEM;
+ /* If flash is described in device tree then store */
node = of_parse_phandle(dev->of_node, "flash", 0);
if (!node) {
- dev_err(dev, "Didn't find host pnor flash node\n");
- return -ENODEV;
- }
-
- rc = of_address_to_resource(node, 1, &resm);
- of_node_put(node);
- if (rc) {
- dev_err(dev, "Couldn't address to resource for flash\n");
- return rc;
+ dev_dbg(dev, "Didn't find host pnor flash node\n");
+ } else {
+ rc = of_address_to_resource(node, 1, &resm);
+ of_node_put(node);
+ if (rc) {
+ dev_err(dev, "Couldn't address to resource for
flash\n");
+ return rc;
+ }
}
lpc_ctrl->pnor_size = resource_size(&resm);
@@ -214,22 +230,22 @@ static int aspeed_lpc_ctrl_probe(struct platform_device
*pdev)
dev_set_drvdata(&pdev->dev, lpc_ctrl);
+ /* If memory-region is described in device tree then store */
node = of_parse_phandle(dev->of_node, "memory-region", 0);
if (!node) {
- dev_err(dev, "Didn't find reserved memory\n");
- return -EINVAL;
- }
+ dev_dbg(dev, "Didn't find reserved memory\n");
+ } else {
+ rc = of_address_to_resource(node, 0, &resm);
+ of_node_put(node);
+ if (rc) {
+ dev_err(dev, "Couldn't address to resource for reserved
memory\n");
+ return -ENOMEM;
+ }
- rc = of_address_to_resource(node, 0, &resm);
- of_node_put(node);
- if (rc) {
- dev_err(dev, "Couldn't address to resource for reserved
memory\n");
- return -ENOMEM;
+ lpc_ctrl->mem_size = resource_size(&resm);
+ lpc_ctrl->mem_base = resm.start;
}
- lpc_ctrl->mem_size = resource_size(&resm);
- lpc_ctrl->mem_base = resm.start;
-
lpc_ctrl->regmap = syscon_node_to_regmap(
pdev->dev.parent->of_node);
if (IS_ERR(lpc_ctrl->regmap)) {
@@ -258,8 +274,6 @@ static int aspeed_lpc_ctrl_probe(struct platform_device
*pdev)
goto err;
}
- dev_info(dev, "Loaded at %pr\n", &resm);
-
return 0;
err:
--
2.17.1
