[PATCH 2/3] nvmem: mediatek: Add Mediatek EFUSE driver

Sascha Hauer
2015-10-26T10:28:34Z

On Mon, Oct 26, 2015 at 09:56:24AM +0000, Srinivas Kandagatla wrote:
> >+ .val_bits = 32,
> >+ .reg_stride = 4,
> >+};
> >+
> >+static int mtk_efuse_probe(struct platform_device *pdev)
> >+{
> >+ struct device *dev = &pdev->dev;
> >+ struct resource *res;
> >+ struct nvmem_device *nvmem;
> >+ struct nvmem_config *econfig;
> >+ struct regmap *regmap;
> >+ void __iomem *base;
> >+
> >+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> >+ base = devm_ioremap_resource(dev, res);
> >+ if (IS_ERR(base))
> >+ return PTR_ERR(base);
> >+
> >+ econfig = devm_kzalloc(dev, sizeof(*econfig), GFP_KERNEL);
> >+ if (!econfig)
> >+ return -ENOMEM;
> Why not use static econfig variable?

Because drivers should not assume there is only one instance of them in
the system. The qfprom driver does this and it's only a matter of
putting a second qcom,qfprom node into the device tree to break the
driver.

Sascha

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