Re: [PATCH] soc: aspeed: lpc-ctrl: make parameter optional

[Vijay Khemka <vijaykhemka@fb.com>]

On 5/29/19, 9:02 PM, "Andrew Jeffery" <andrew@aj.id.au> wrote:

    
    
    On Thu, 30 May 2019, at 02:51, Vijay Khemka wrote:
    > Makiing
    
    Typo here, but I'd prefer to see this patch go in, so
Corrected in next version v2.
    
    > 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>
    
    Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
    
    > ---
    >  drivers/soc/aspeed/aspeed-lpc-ctrl.c | 58 +++++++++++++++++-----------
    >  1 file changed, 36 insertions(+), 22 deletions(-)
    > 
    > diff --git a/drivers/soc/aspeed/aspeed-lpc-ctrl.c 
    > b/drivers/soc/aspeed/aspeed-lpc-ctrl.c
    > index a024f8042259..aca13779764a 100644
    > --- a/drivers/soc/aspeed/aspeed-lpc-ctrl.c
    > +++ b/drivers/soc/aspeed/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_dbg(dev, "Didn't find reserved memory\n");
    > +			return -ENXIO;
    > +		}
    > +
    >  		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_dbg(dev, "Didn't find host pnor flash\n");
    > +				return -ENXIO;
    > +			}
    >  			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_dbg(dev, "Didn't find reserved memory\n");
    > +				return -ENXIO;
    > +			}
    >  			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 -ENXIO;
    > +		}
    >  
    > -	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
    > 
    >