Messages in this thread | | | Date | Fri, 27 May 2011 16:29:17 +0800 | From | Shawn Guo <> | Subject | Re: [PATCH 2/3] ARM: mxs: add gpio-mxs platform devices |
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On Fri, May 20, 2011 at 12:23:00PM +0200, Arnd Bergmann wrote: [...] > > +#define mxs_gpio_data_entry_single(soc, _id) \ > > + { \ > > + .id = _id, \ > > + .iobase = soc ## _PINCTRL ## _BASE_ADDR, \ > > + .irq = soc ## _INT_GPIO ## _id, \ > > + } > > + > > +#define mxs_gpio_data_entry(soc, _id) \ > > + [_id] = mxs_gpio_data_entry_single(soc, _id) > > + > > +#ifdef CONFIG_SOC_IMX23 > > +const struct mxs_gpio_data mx23_gpio_data[] __initconst = { > > +#define mx23_gpio_data_entry(_id) \ > > + mxs_gpio_data_entry(MX23, _id) > > I know it's tempting to use macros for these, but I think it obscures > the code a lot, especially when you use them to concatenate identifier > names. Why not just do: > > struct platform_device *gpios; > gpios = platform_device_register_simple(mxs_host_bus, "mxs-gpio-master", 0, NULL, 0); > platform_device_register_simple does not have parameter for 'parent', and it sets 'parent' NULL anyway.
-- Regards, Shawn
> mxs_register_gpio(gpios, 0, MX23_PINCTRL_BASE_ADDR, MX23_INT_GPIO_0); > mxs_register_gpio(gpios, 1, MX23_PINCTRL_BASE_ADDR, MX23_INT_GPIO_1); > mxs_register_gpio(gpios, 2, MX23_PINCTRL_BASE_ADDR, MX23_INT_GPIO_2); > mxs_register_gpio(gpios, 3, MX23_PINCTRL_BASE_ADDR, MX23_INT_GPIO_3); > > This is actually shorter and it makes it possible to grep for the > macros you use. > > > +struct platform_device *__init mxs_add_gpio( > > + const struct mxs_gpio_data *data) > > +{ > > + struct resource res[] = { > > + { > > + .start = data->iobase, > > + .end = data->iobase + SZ_8K - 1, > > + .flags = IORESOURCE_MEM, > > + }, { > > + .start = data->irq, > > + .end = data->irq, > > + .flags = IORESOURCE_IRQ, > > + }, > > + }; > > + > > + return mxs_add_platform_device("mxs-gpio", data->id, > > + res, ARRAY_SIZE(res), NULL, 0); > > +} > > mxs_add_platform_device doesn't set the parent pointer correctly, I think you > should either fix that or open-code the platform device creation to do it > right. >
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