diff mbox series

misc: aspeed-lpc-ctrl: make parameter optional

Message ID 20190501223411.1655854-1-vijaykhemka@fb.com (mailing list archive)
State New, archived
Headers show
Series misc: aspeed-lpc-ctrl: make parameter optional | expand

Commit Message

Vijay Khemka May 1, 2019, 10:34 p.m. UTC 
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 <vijaykhemka@fb.com>
---
 drivers/misc/aspeed-lpc-ctrl.c | 58 +++++++++++++++++++++-------------
 1 file changed, 36 insertions(+), 22 deletions(-)

Comments

Greg Kroah-Hartman May 24, 2019, 3:59 p.m. UTC | #1 
On Wed, May 01, 2019 at 03:34:11PM -0700, Vijay Khemka wrote:
> 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 <vijaykhemka@fb.com>
> ---
>  drivers/misc/aspeed-lpc-ctrl.c | 58 +++++++++++++++++++++-------------
>  1 file changed, 36 insertions(+), 22 deletions(-)

File is no longer at this location :(
Vijay Khemka May 29, 2019, 5:22 p.m. UTC | #2 
On 5/24/19, 8:59 AM, "Greg Kroah-Hartman" <gregkh@linuxfoundation.org> wrote:

    On Wed, May 01, 2019 at 03:34:11PM -0700, Vijay Khemka wrote:
    > 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 <vijaykhemka@fb.com>
    > ---
    >  drivers/misc/aspeed-lpc-ctrl.c | 58 +++++++++++++++++++++-------------
    >  1 file changed, 36 insertions(+), 22 deletions(-)
    
    File is no longer at this location :(

I have rebased to new location and combined both patches and submitted again. __

Regards
-Vijay
diff mbox series

Patch

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: