Re: [ts-7000] Help - confused by platform driver code.

[Petr Štetiar <>]

Dom Storey <> [2010-02-28 07:08:38]:

> This location should be done in the probe routine of the driver. Yet on all
> the other drivers I have examined, I can't see how they locate specific
> locations in memory.

Take a look at Matthieu's patches[1], for example at his 
0006-ts72xx_ts_ser1.patch.

> Most drivers seem to have
> 
> r_data = platform_get_resource(pdev, IORESOURCE_MEM, 0);

but to use this, you would need to define resource first:

        static struct resource ts72xx_mydrv_resources[] = {
        {
                .start = TS72XX_PC104_8BIT_IO_PHYS_BASE,
                .end   = TS72XX_PC104_8BIT_IO_PHYS_BASE + 
TS72XX_PC104_8BIT_IO_SIZE,
                .flags = IORESOURCE_MEM,
        }

then assign the resource to your platform_device:

        static struct platform_device ts72xx_mydrv_device = {
                .resource       = ts72xx_mydrv_resources,
                .num_resources  = ARRAY_SIZE(ts72xx_mydrv_resources),
        }

then register it:

        platform_device_register(&ts72xx_mydrv_device);

and now you can do:

        mem_resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);

But I think, that you can do it easily using ioremap, __raw{read, write}b as
Matthieu is doing in his ts_ser1 driver.

1. http://mcrapet.free.fr/

-- ynezz


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