[PATCH v5 1/4] mfd: add syscon driver based on regmap
Sergei Shtylyov
sshtylyov at mvista.com
Tue Sep 4 22:16:59 EST 2012
Hello.
On 04-09-2012 15:35, Andi Shyti wrote:
>> +static int __devinit syscon_probe(struct platform_device *pdev)
>> +{
>> + struct device *dev = &pdev->dev;
> Do we really need this variable? Anyway you are using it only
> once in the dev_info.
But Dong definitely could use it more than once, so it seems useful.
>> + struct device_node *np = dev->of_node;
>> + struct syscon *syscon;
>> + struct resource res;
>> + int ret;
>> +
>> + if (!np)
>> + return -ENOENT;
>> +
>> + syscon = devm_kzalloc(&pdev->dev, sizeof(struct syscon),
>> + GFP_KERNEL);
>> + if (!syscon)
>> + return -ENOMEM;
>> +
>> + syscon->base = of_iomap(np, 0);
>> + if (!syscon->base)
>> + return -EADDRNOTAVAIL;
>> +
>> + ret = of_address_to_resource(np, 0, &res);
>> + if (ret)
>> + return ret;
>> +
>> + syscon_regmap_config.max_register = res.end - res.start - 3;
>> + syscon->regmap = devm_regmap_init_mmio(&pdev->dev, syscon->base,
>> + &syscon_regmap_config);
>> + if (IS_ERR(syscon->regmap)) {
>> + dev_err(&pdev->dev, "regmap init failed\n");
>> + return PTR_ERR(syscon->regmap);
>> + }
>> +
>> + syscon->dev = &pdev->dev;
>> + platform_set_drvdata(pdev, syscon);
>> +
>> + dev_info(dev, "syscon regmap start 0x%x end 0x%x registered\n",
>> + res.start, res.end);
>> +
>> + return 0;
> in case of error you are not freeing syscon.
It's allocated using devm_kzalloc(), so is freed automaticelly upon probe
error.
> Moreover, in my opinion, some dev_err more should not heart
Hurt, you mean?
> Andi
WBR, Sergei
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