Hi,
in a watchdog driver on an ARM platform, I have the need to write a hw
register managed by another driver (system reset controller).
I'm wondering what is the correct/clean way of doing that.
What I've done until now is adding a second couple in the "reg" property
of the device-tree
&wdog1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_wdog>;
reg = <0x30280000 0x10000>, <0x30390000 0x10000>;
fsl,wdog_b;
};
and then in the wdog driver adding the following code:
static void __iomem *src_base;
...
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
src_base = devm_ioremap(&pdev->dev, res->start, res->end - res->start + 1);
if (IS_ERR(src_base))
return PTR_ERR(src_base);
...
writel(0x3, src_base + 4);
In this way it works as expected, but I'm not sure if this is correct?
Thanks
Best regards
Luca
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