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Date:   Fri, 14 Jun 2019 21:41:39 +0000
From:   Vijay Khemka <vijaykhemka@...com>
To:     Joel Stanley <joel@....id.au>, Andrew Jeffery <andrew@...id.au>,
        "Patrick Venture" <venture@...gle.com>,
        Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-aspeed@...ts.ozlabs.org" <linux-aspeed@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Sai Dasari <sdasari@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v2] soc: aspeed: lpc-ctrl: make parameter optional

Hi Andrew,
Any update on this patch or do I need any more rework.

Regards
-Vijay

´╗┐On 6/6/19, 11:51 AM, "Vijay Khemka" <vijaykhemka@...com> wrote:

    Please update on this patch.
    
    On 5/30/19, 1:37 PM, "Vijay Khemka" <vijaykhemka@...com> wrote:
    
        Making 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@...com>
        Reviewed-by: Andrew Jeffery <andrew@...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
        
        
    
    

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