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Old 08-12-2018, 07:19 AM   #1
tdrs
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Registered: Aug 2018
Posts: 1

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how to loop over multiple registers in linux device tree node?


I implemented a generic driver, in the driver I just want to go over each registered device and do something.
my driver is generic so I don't want to know anything in advance about the devices.

I have some device tree nodes:

uart0: uart@1000000 {
compatible = "generic-driver";
reg = <0x1000000 0x1000>,<0x1001000 0x1000>,<0x1002000 0x1000>;
};

uart1: uart@2000000 {
compatible = "generic-driver";
reg = <0x2000000 0x1000>,<0x2001000 0x1000>,<0x2002000 0x1000>;
};

in the driver I know how to get first offset and size with platform_get_resource, but what if I have multiple ranges?
I saw an option to get it by add reg-names:

reg = <0x2000000 0x1000>,<0x2001000 0x1000>,<0x2002000 0x1000>;
reg-names = "uart0_0","urat0_1","uart0_2";
so in the driver I can use platform_get_resource_byname, but there I need to know in the driver the regs names in advance - but it'll be no more generic - unwanted!!

so my question is, is there a way to loop over these regs without early information in the driver?

Thanks in advance!!
 
  


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